Parcel.java revision aa861666ed537389e335f586bc84fe8ddb9fb026
1/* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.os; 18 19import android.text.TextUtils; 20import android.util.ArrayMap; 21import android.util.Log; 22import android.util.Size; 23import android.util.SizeF; 24import android.util.SparseArray; 25import android.util.SparseBooleanArray; 26 27import java.io.ByteArrayInputStream; 28import java.io.ByteArrayOutputStream; 29import java.io.FileDescriptor; 30import java.io.FileNotFoundException; 31import java.io.IOException; 32import java.io.ObjectInputStream; 33import java.io.ObjectOutputStream; 34import java.io.ObjectStreamClass; 35import java.io.Serializable; 36import java.lang.reflect.Field; 37import java.util.ArrayList; 38import java.util.Arrays; 39import java.util.HashMap; 40import java.util.List; 41import java.util.Map; 42import java.util.Set; 43 44/** 45 * Container for a message (data and object references) that can 46 * be sent through an IBinder. A Parcel can contain both flattened data 47 * that will be unflattened on the other side of the IPC (using the various 48 * methods here for writing specific types, or the general 49 * {@link Parcelable} interface), and references to live {@link IBinder} 50 * objects that will result in the other side receiving a proxy IBinder 51 * connected with the original IBinder in the Parcel. 52 * 53 * <p class="note">Parcel is <strong>not</strong> a general-purpose 54 * serialization mechanism. This class (and the corresponding 55 * {@link Parcelable} API for placing arbitrary objects into a Parcel) is 56 * designed as a high-performance IPC transport. As such, it is not 57 * appropriate to place any Parcel data in to persistent storage: changes 58 * in the underlying implementation of any of the data in the Parcel can 59 * render older data unreadable.</p> 60 * 61 * <p>The bulk of the Parcel API revolves around reading and writing data 62 * of various types. There are six major classes of such functions available.</p> 63 * 64 * <h3>Primitives</h3> 65 * 66 * <p>The most basic data functions are for writing and reading primitive 67 * data types: {@link #writeByte}, {@link #readByte}, {@link #writeDouble}, 68 * {@link #readDouble}, {@link #writeFloat}, {@link #readFloat}, {@link #writeInt}, 69 * {@link #readInt}, {@link #writeLong}, {@link #readLong}, 70 * {@link #writeString}, {@link #readString}. Most other 71 * data operations are built on top of these. The given data is written and 72 * read using the endianess of the host CPU.</p> 73 * 74 * <h3>Primitive Arrays</h3> 75 * 76 * <p>There are a variety of methods for reading and writing raw arrays 77 * of primitive objects, which generally result in writing a 4-byte length 78 * followed by the primitive data items. The methods for reading can either 79 * read the data into an existing array, or create and return a new array. 80 * These available types are:</p> 81 * 82 * <ul> 83 * <li> {@link #writeBooleanArray(boolean[])}, 84 * {@link #readBooleanArray(boolean[])}, {@link #createBooleanArray()} 85 * <li> {@link #writeByteArray(byte[])}, 86 * {@link #writeByteArray(byte[], int, int)}, {@link #readByteArray(byte[])}, 87 * {@link #createByteArray()} 88 * <li> {@link #writeCharArray(char[])}, {@link #readCharArray(char[])}, 89 * {@link #createCharArray()} 90 * <li> {@link #writeDoubleArray(double[])}, {@link #readDoubleArray(double[])}, 91 * {@link #createDoubleArray()} 92 * <li> {@link #writeFloatArray(float[])}, {@link #readFloatArray(float[])}, 93 * {@link #createFloatArray()} 94 * <li> {@link #writeIntArray(int[])}, {@link #readIntArray(int[])}, 95 * {@link #createIntArray()} 96 * <li> {@link #writeLongArray(long[])}, {@link #readLongArray(long[])}, 97 * {@link #createLongArray()} 98 * <li> {@link #writeStringArray(String[])}, {@link #readStringArray(String[])}, 99 * {@link #createStringArray()}. 100 * <li> {@link #writeSparseBooleanArray(SparseBooleanArray)}, 101 * {@link #readSparseBooleanArray()}. 102 * </ul> 103 * 104 * <h3>Parcelables</h3> 105 * 106 * <p>The {@link Parcelable} protocol provides an extremely efficient (but 107 * low-level) protocol for objects to write and read themselves from Parcels. 108 * You can use the direct methods {@link #writeParcelable(Parcelable, int)} 109 * and {@link #readParcelable(ClassLoader)} or 110 * {@link #writeParcelableArray} and 111 * {@link #readParcelableArray(ClassLoader)} to write or read. These 112 * methods write both the class type and its data to the Parcel, allowing 113 * that class to be reconstructed from the appropriate class loader when 114 * later reading.</p> 115 * 116 * <p>There are also some methods that provide a more efficient way to work 117 * with Parcelables: {@link #writeTypedArray}, 118 * {@link #writeTypedList(List)}, 119 * {@link #readTypedArray} and {@link #readTypedList}. These methods 120 * do not write the class information of the original object: instead, the 121 * caller of the read function must know what type to expect and pass in the 122 * appropriate {@link Parcelable.Creator Parcelable.Creator} instead to 123 * properly construct the new object and read its data. (To more efficient 124 * write and read a single Parceable object, you can directly call 125 * {@link Parcelable#writeToParcel Parcelable.writeToParcel} and 126 * {@link Parcelable.Creator#createFromParcel Parcelable.Creator.createFromParcel} 127 * yourself.)</p> 128 * 129 * <h3>Bundles</h3> 130 * 131 * <p>A special type-safe container, called {@link Bundle}, is available 132 * for key/value maps of heterogeneous values. This has many optimizations 133 * for improved performance when reading and writing data, and its type-safe 134 * API avoids difficult to debug type errors when finally marshalling the 135 * data contents into a Parcel. The methods to use are 136 * {@link #writeBundle(Bundle)}, {@link #readBundle()}, and 137 * {@link #readBundle(ClassLoader)}. 138 * 139 * <h3>Active Objects</h3> 140 * 141 * <p>An unusual feature of Parcel is the ability to read and write active 142 * objects. For these objects the actual contents of the object is not 143 * written, rather a special token referencing the object is written. When 144 * reading the object back from the Parcel, you do not get a new instance of 145 * the object, but rather a handle that operates on the exact same object that 146 * was originally written. There are two forms of active objects available.</p> 147 * 148 * <p>{@link Binder} objects are a core facility of Android's general cross-process 149 * communication system. The {@link IBinder} interface describes an abstract 150 * protocol with a Binder object. Any such interface can be written in to 151 * a Parcel, and upon reading you will receive either the original object 152 * implementing that interface or a special proxy implementation 153 * that communicates calls back to the original object. The methods to use are 154 * {@link #writeStrongBinder(IBinder)}, 155 * {@link #writeStrongInterface(IInterface)}, {@link #readStrongBinder()}, 156 * {@link #writeBinderArray(IBinder[])}, {@link #readBinderArray(IBinder[])}, 157 * {@link #createBinderArray()}, 158 * {@link #writeBinderList(List)}, {@link #readBinderList(List)}, 159 * {@link #createBinderArrayList()}.</p> 160 * 161 * <p>FileDescriptor objects, representing raw Linux file descriptor identifiers, 162 * can be written and {@link ParcelFileDescriptor} objects returned to operate 163 * on the original file descriptor. The returned file descriptor is a dup 164 * of the original file descriptor: the object and fd is different, but 165 * operating on the same underlying file stream, with the same position, etc. 166 * The methods to use are {@link #writeFileDescriptor(FileDescriptor)}, 167 * {@link #readFileDescriptor()}. 168 * 169 * <h3>Untyped Containers</h3> 170 * 171 * <p>A final class of methods are for writing and reading standard Java 172 * containers of arbitrary types. These all revolve around the 173 * {@link #writeValue(Object)} and {@link #readValue(ClassLoader)} methods 174 * which define the types of objects allowed. The container methods are 175 * {@link #writeArray(Object[])}, {@link #readArray(ClassLoader)}, 176 * {@link #writeList(List)}, {@link #readList(List, ClassLoader)}, 177 * {@link #readArrayList(ClassLoader)}, 178 * {@link #writeMap(Map)}, {@link #readMap(Map, ClassLoader)}, 179 * {@link #writeSparseArray(SparseArray)}, 180 * {@link #readSparseArray(ClassLoader)}. 181 */ 182public final class Parcel { 183 private static final boolean DEBUG_RECYCLE = false; 184 private static final boolean DEBUG_ARRAY_MAP = false; 185 private static final String TAG = "Parcel"; 186 187 @SuppressWarnings({"UnusedDeclaration"}) 188 private long mNativePtr; // used by native code 189 190 /** 191 * Flag indicating if {@link #mNativePtr} was allocated by this object, 192 * indicating that we're responsible for its lifecycle. 193 */ 194 private boolean mOwnsNativeParcelObject; 195 196 private RuntimeException mStack; 197 198 private static final int POOL_SIZE = 6; 199 private static final Parcel[] sOwnedPool = new Parcel[POOL_SIZE]; 200 private static final Parcel[] sHolderPool = new Parcel[POOL_SIZE]; 201 202 private static final int VAL_NULL = -1; 203 private static final int VAL_STRING = 0; 204 private static final int VAL_INTEGER = 1; 205 private static final int VAL_MAP = 2; 206 private static final int VAL_BUNDLE = 3; 207 private static final int VAL_PARCELABLE = 4; 208 private static final int VAL_SHORT = 5; 209 private static final int VAL_LONG = 6; 210 private static final int VAL_FLOAT = 7; 211 private static final int VAL_DOUBLE = 8; 212 private static final int VAL_BOOLEAN = 9; 213 private static final int VAL_CHARSEQUENCE = 10; 214 private static final int VAL_LIST = 11; 215 private static final int VAL_SPARSEARRAY = 12; 216 private static final int VAL_BYTEARRAY = 13; 217 private static final int VAL_STRINGARRAY = 14; 218 private static final int VAL_IBINDER = 15; 219 private static final int VAL_PARCELABLEARRAY = 16; 220 private static final int VAL_OBJECTARRAY = 17; 221 private static final int VAL_INTARRAY = 18; 222 private static final int VAL_LONGARRAY = 19; 223 private static final int VAL_BYTE = 20; 224 private static final int VAL_SERIALIZABLE = 21; 225 private static final int VAL_SPARSEBOOLEANARRAY = 22; 226 private static final int VAL_BOOLEANARRAY = 23; 227 private static final int VAL_CHARSEQUENCEARRAY = 24; 228 private static final int VAL_PERSISTABLEBUNDLE = 25; 229 private static final int VAL_SIZE = 26; 230 private static final int VAL_SIZEF = 27; 231 232 // The initial int32 in a Binder call's reply Parcel header: 233 private static final int EX_SECURITY = -1; 234 private static final int EX_BAD_PARCELABLE = -2; 235 private static final int EX_ILLEGAL_ARGUMENT = -3; 236 private static final int EX_NULL_POINTER = -4; 237 private static final int EX_ILLEGAL_STATE = -5; 238 private static final int EX_NETWORK_MAIN_THREAD = -6; 239 private static final int EX_UNSUPPORTED_OPERATION = -7; 240 private static final int EX_HAS_REPLY_HEADER = -128; // special; see below 241 242 private static native int nativeDataSize(long nativePtr); 243 private static native int nativeDataAvail(long nativePtr); 244 private static native int nativeDataPosition(long nativePtr); 245 private static native int nativeDataCapacity(long nativePtr); 246 private static native void nativeSetDataSize(long nativePtr, int size); 247 private static native void nativeSetDataPosition(long nativePtr, int pos); 248 private static native void nativeSetDataCapacity(long nativePtr, int size); 249 250 private static native boolean nativePushAllowFds(long nativePtr, boolean allowFds); 251 private static native void nativeRestoreAllowFds(long nativePtr, boolean lastValue); 252 253 private static native void nativeWriteByteArray(long nativePtr, byte[] b, int offset, int len); 254 private static native void nativeWriteBlob(long nativePtr, byte[] b, int offset, int len); 255 private static native void nativeWriteInt(long nativePtr, int val); 256 private static native void nativeWriteLong(long nativePtr, long val); 257 private static native void nativeWriteFloat(long nativePtr, float val); 258 private static native void nativeWriteDouble(long nativePtr, double val); 259 private static native void nativeWriteString(long nativePtr, String val); 260 private static native void nativeWriteStrongBinder(long nativePtr, IBinder val); 261 private static native void nativeWriteFileDescriptor(long nativePtr, FileDescriptor val); 262 263 private static native byte[] nativeCreateByteArray(long nativePtr); 264 private static native byte[] nativeReadBlob(long nativePtr); 265 private static native int nativeReadInt(long nativePtr); 266 private static native long nativeReadLong(long nativePtr); 267 private static native float nativeReadFloat(long nativePtr); 268 private static native double nativeReadDouble(long nativePtr); 269 private static native String nativeReadString(long nativePtr); 270 private static native IBinder nativeReadStrongBinder(long nativePtr); 271 private static native FileDescriptor nativeReadFileDescriptor(long nativePtr); 272 273 private static native long nativeCreate(); 274 private static native void nativeFreeBuffer(long nativePtr); 275 private static native void nativeDestroy(long nativePtr); 276 277 private static native byte[] nativeMarshall(long nativePtr); 278 private static native void nativeUnmarshall( 279 long nativePtr, byte[] data, int offset, int length); 280 private static native void nativeAppendFrom( 281 long thisNativePtr, long otherNativePtr, int offset, int length); 282 private static native boolean nativeHasFileDescriptors(long nativePtr); 283 private static native void nativeWriteInterfaceToken(long nativePtr, String interfaceName); 284 private static native void nativeEnforceInterface(long nativePtr, String interfaceName); 285 286 private static native long nativeGetBlobAshmemSize(long nativePtr); 287 288 public final static Parcelable.Creator<String> STRING_CREATOR 289 = new Parcelable.Creator<String>() { 290 public String createFromParcel(Parcel source) { 291 return source.readString(); 292 } 293 public String[] newArray(int size) { 294 return new String[size]; 295 } 296 }; 297 298 /** 299 * Retrieve a new Parcel object from the pool. 300 */ 301 public static Parcel obtain() { 302 final Parcel[] pool = sOwnedPool; 303 synchronized (pool) { 304 Parcel p; 305 for (int i=0; i<POOL_SIZE; i++) { 306 p = pool[i]; 307 if (p != null) { 308 pool[i] = null; 309 if (DEBUG_RECYCLE) { 310 p.mStack = new RuntimeException(); 311 } 312 return p; 313 } 314 } 315 } 316 return new Parcel(0); 317 } 318 319 /** 320 * Put a Parcel object back into the pool. You must not touch 321 * the object after this call. 322 */ 323 public final void recycle() { 324 if (DEBUG_RECYCLE) mStack = null; 325 freeBuffer(); 326 327 final Parcel[] pool; 328 if (mOwnsNativeParcelObject) { 329 pool = sOwnedPool; 330 } else { 331 mNativePtr = 0; 332 pool = sHolderPool; 333 } 334 335 synchronized (pool) { 336 for (int i=0; i<POOL_SIZE; i++) { 337 if (pool[i] == null) { 338 pool[i] = this; 339 return; 340 } 341 } 342 } 343 } 344 345 /** @hide */ 346 public static native long getGlobalAllocSize(); 347 348 /** @hide */ 349 public static native long getGlobalAllocCount(); 350 351 /** 352 * Returns the total amount of data contained in the parcel. 353 */ 354 public final int dataSize() { 355 return nativeDataSize(mNativePtr); 356 } 357 358 /** 359 * Returns the amount of data remaining to be read from the 360 * parcel. That is, {@link #dataSize}-{@link #dataPosition}. 361 */ 362 public final int dataAvail() { 363 return nativeDataAvail(mNativePtr); 364 } 365 366 /** 367 * Returns the current position in the parcel data. Never 368 * more than {@link #dataSize}. 369 */ 370 public final int dataPosition() { 371 return nativeDataPosition(mNativePtr); 372 } 373 374 /** 375 * Returns the total amount of space in the parcel. This is always 376 * >= {@link #dataSize}. The difference between it and dataSize() is the 377 * amount of room left until the parcel needs to re-allocate its 378 * data buffer. 379 */ 380 public final int dataCapacity() { 381 return nativeDataCapacity(mNativePtr); 382 } 383 384 /** 385 * Change the amount of data in the parcel. Can be either smaller or 386 * larger than the current size. If larger than the current capacity, 387 * more memory will be allocated. 388 * 389 * @param size The new number of bytes in the Parcel. 390 */ 391 public final void setDataSize(int size) { 392 nativeSetDataSize(mNativePtr, size); 393 } 394 395 /** 396 * Move the current read/write position in the parcel. 397 * @param pos New offset in the parcel; must be between 0 and 398 * {@link #dataSize}. 399 */ 400 public final void setDataPosition(int pos) { 401 nativeSetDataPosition(mNativePtr, pos); 402 } 403 404 /** 405 * Change the capacity (current available space) of the parcel. 406 * 407 * @param size The new capacity of the parcel, in bytes. Can not be 408 * less than {@link #dataSize} -- that is, you can not drop existing data 409 * with this method. 410 */ 411 public final void setDataCapacity(int size) { 412 nativeSetDataCapacity(mNativePtr, size); 413 } 414 415 /** @hide */ 416 public final boolean pushAllowFds(boolean allowFds) { 417 return nativePushAllowFds(mNativePtr, allowFds); 418 } 419 420 /** @hide */ 421 public final void restoreAllowFds(boolean lastValue) { 422 nativeRestoreAllowFds(mNativePtr, lastValue); 423 } 424 425 /** 426 * Returns the raw bytes of the parcel. 427 * 428 * <p class="note">The data you retrieve here <strong>must not</strong> 429 * be placed in any kind of persistent storage (on local disk, across 430 * a network, etc). For that, you should use standard serialization 431 * or another kind of general serialization mechanism. The Parcel 432 * marshalled representation is highly optimized for local IPC, and as 433 * such does not attempt to maintain compatibility with data created 434 * in different versions of the platform. 435 */ 436 public final byte[] marshall() { 437 return nativeMarshall(mNativePtr); 438 } 439 440 /** 441 * Set the bytes in data to be the raw bytes of this Parcel. 442 */ 443 public final void unmarshall(byte[] data, int offset, int length) { 444 nativeUnmarshall(mNativePtr, data, offset, length); 445 } 446 447 public final void appendFrom(Parcel parcel, int offset, int length) { 448 nativeAppendFrom(mNativePtr, parcel.mNativePtr, offset, length); 449 } 450 451 /** 452 * Report whether the parcel contains any marshalled file descriptors. 453 */ 454 public final boolean hasFileDescriptors() { 455 return nativeHasFileDescriptors(mNativePtr); 456 } 457 458 /** 459 * Store or read an IBinder interface token in the parcel at the current 460 * {@link #dataPosition}. This is used to validate that the marshalled 461 * transaction is intended for the target interface. 462 */ 463 public final void writeInterfaceToken(String interfaceName) { 464 nativeWriteInterfaceToken(mNativePtr, interfaceName); 465 } 466 467 public final void enforceInterface(String interfaceName) { 468 nativeEnforceInterface(mNativePtr, interfaceName); 469 } 470 471 /** 472 * Write a byte array into the parcel at the current {@link #dataPosition}, 473 * growing {@link #dataCapacity} if needed. 474 * @param b Bytes to place into the parcel. 475 */ 476 public final void writeByteArray(byte[] b) { 477 writeByteArray(b, 0, (b != null) ? b.length : 0); 478 } 479 480 /** 481 * Write a byte array into the parcel at the current {@link #dataPosition}, 482 * growing {@link #dataCapacity} if needed. 483 * @param b Bytes to place into the parcel. 484 * @param offset Index of first byte to be written. 485 * @param len Number of bytes to write. 486 */ 487 public final void writeByteArray(byte[] b, int offset, int len) { 488 if (b == null) { 489 writeInt(-1); 490 return; 491 } 492 Arrays.checkOffsetAndCount(b.length, offset, len); 493 nativeWriteByteArray(mNativePtr, b, offset, len); 494 } 495 496 /** 497 * Write a blob of data into the parcel at the current {@link #dataPosition}, 498 * growing {@link #dataCapacity} if needed. 499 * @param b Bytes to place into the parcel. 500 * {@hide} 501 * {@SystemApi} 502 */ 503 public final void writeBlob(byte[] b) { 504 nativeWriteBlob(mNativePtr, b, 0, (b != null) ? b.length : 0); 505 } 506 507 /** 508 * Write an integer value into the parcel at the current dataPosition(), 509 * growing dataCapacity() if needed. 510 */ 511 public final void writeInt(int val) { 512 nativeWriteInt(mNativePtr, val); 513 } 514 515 /** 516 * Write a long integer value into the parcel at the current dataPosition(), 517 * growing dataCapacity() if needed. 518 */ 519 public final void writeLong(long val) { 520 nativeWriteLong(mNativePtr, val); 521 } 522 523 /** 524 * Write a floating point value into the parcel at the current 525 * dataPosition(), growing dataCapacity() if needed. 526 */ 527 public final void writeFloat(float val) { 528 nativeWriteFloat(mNativePtr, val); 529 } 530 531 /** 532 * Write a double precision floating point value into the parcel at the 533 * current dataPosition(), growing dataCapacity() if needed. 534 */ 535 public final void writeDouble(double val) { 536 nativeWriteDouble(mNativePtr, val); 537 } 538 539 /** 540 * Write a string value into the parcel at the current dataPosition(), 541 * growing dataCapacity() if needed. 542 */ 543 public final void writeString(String val) { 544 nativeWriteString(mNativePtr, val); 545 } 546 547 /** 548 * Write a CharSequence value into the parcel at the current dataPosition(), 549 * growing dataCapacity() if needed. 550 * @hide 551 */ 552 public final void writeCharSequence(CharSequence val) { 553 TextUtils.writeToParcel(val, this, 0); 554 } 555 556 /** 557 * Write an object into the parcel at the current dataPosition(), 558 * growing dataCapacity() if needed. 559 */ 560 public final void writeStrongBinder(IBinder val) { 561 nativeWriteStrongBinder(mNativePtr, val); 562 } 563 564 /** 565 * Write an object into the parcel at the current dataPosition(), 566 * growing dataCapacity() if needed. 567 */ 568 public final void writeStrongInterface(IInterface val) { 569 writeStrongBinder(val == null ? null : val.asBinder()); 570 } 571 572 /** 573 * Write a FileDescriptor into the parcel at the current dataPosition(), 574 * growing dataCapacity() if needed. 575 * 576 * <p class="caution">The file descriptor will not be closed, which may 577 * result in file descriptor leaks when objects are returned from Binder 578 * calls. Use {@link ParcelFileDescriptor#writeToParcel} instead, which 579 * accepts contextual flags and will close the original file descriptor 580 * if {@link Parcelable#PARCELABLE_WRITE_RETURN_VALUE} is set.</p> 581 */ 582 public final void writeFileDescriptor(FileDescriptor val) { 583 nativeWriteFileDescriptor(mNativePtr, val); 584 } 585 586 /** 587 * Write a byte value into the parcel at the current dataPosition(), 588 * growing dataCapacity() if needed. 589 */ 590 public final void writeByte(byte val) { 591 writeInt(val); 592 } 593 594 /** 595 * Please use {@link #writeBundle} instead. Flattens a Map into the parcel 596 * at the current dataPosition(), 597 * growing dataCapacity() if needed. The Map keys must be String objects. 598 * The Map values are written using {@link #writeValue} and must follow 599 * the specification there. 600 * 601 * <p>It is strongly recommended to use {@link #writeBundle} instead of 602 * this method, since the Bundle class provides a type-safe API that 603 * allows you to avoid mysterious type errors at the point of marshalling. 604 */ 605 public final void writeMap(Map val) { 606 writeMapInternal((Map<String, Object>) val); 607 } 608 609 /** 610 * Flatten a Map into the parcel at the current dataPosition(), 611 * growing dataCapacity() if needed. The Map keys must be String objects. 612 */ 613 /* package */ void writeMapInternal(Map<String,Object> val) { 614 if (val == null) { 615 writeInt(-1); 616 return; 617 } 618 Set<Map.Entry<String,Object>> entries = val.entrySet(); 619 writeInt(entries.size()); 620 for (Map.Entry<String,Object> e : entries) { 621 writeValue(e.getKey()); 622 writeValue(e.getValue()); 623 } 624 } 625 626 /** 627 * Flatten an ArrayMap into the parcel at the current dataPosition(), 628 * growing dataCapacity() if needed. The Map keys must be String objects. 629 */ 630 /* package */ void writeArrayMapInternal(ArrayMap<String, Object> val) { 631 if (val == null) { 632 writeInt(-1); 633 return; 634 } 635 final int N = val.size(); 636 writeInt(N); 637 if (DEBUG_ARRAY_MAP) { 638 RuntimeException here = new RuntimeException("here"); 639 here.fillInStackTrace(); 640 Log.d(TAG, "Writing " + N + " ArrayMap entries", here); 641 } 642 int startPos; 643 for (int i=0; i<N; i++) { 644 if (DEBUG_ARRAY_MAP) startPos = dataPosition(); 645 writeString(val.keyAt(i)); 646 writeValue(val.valueAt(i)); 647 if (DEBUG_ARRAY_MAP) Log.d(TAG, " Write #" + i + " " 648 + (dataPosition()-startPos) + " bytes: key=0x" 649 + Integer.toHexString(val.keyAt(i) != null ? val.keyAt(i).hashCode() : 0) 650 + " " + val.keyAt(i)); 651 } 652 } 653 654 /** 655 * @hide For testing only. 656 */ 657 public void writeArrayMap(ArrayMap<String, Object> val) { 658 writeArrayMapInternal(val); 659 } 660 661 /** 662 * Flatten a Bundle into the parcel at the current dataPosition(), 663 * growing dataCapacity() if needed. 664 */ 665 public final void writeBundle(Bundle val) { 666 if (val == null) { 667 writeInt(-1); 668 return; 669 } 670 671 val.writeToParcel(this, 0); 672 } 673 674 /** 675 * Flatten a PersistableBundle into the parcel at the current dataPosition(), 676 * growing dataCapacity() if needed. 677 */ 678 public final void writePersistableBundle(PersistableBundle val) { 679 if (val == null) { 680 writeInt(-1); 681 return; 682 } 683 684 val.writeToParcel(this, 0); 685 } 686 687 /** 688 * Flatten a Size into the parcel at the current dataPosition(), 689 * growing dataCapacity() if needed. 690 */ 691 public final void writeSize(Size val) { 692 writeInt(val.getWidth()); 693 writeInt(val.getHeight()); 694 } 695 696 /** 697 * Flatten a SizeF into the parcel at the current dataPosition(), 698 * growing dataCapacity() if needed. 699 */ 700 public final void writeSizeF(SizeF val) { 701 writeFloat(val.getWidth()); 702 writeFloat(val.getHeight()); 703 } 704 705 /** 706 * Flatten a List into the parcel at the current dataPosition(), growing 707 * dataCapacity() if needed. The List values are written using 708 * {@link #writeValue} and must follow the specification there. 709 */ 710 public final void writeList(List val) { 711 if (val == null) { 712 writeInt(-1); 713 return; 714 } 715 int N = val.size(); 716 int i=0; 717 writeInt(N); 718 while (i < N) { 719 writeValue(val.get(i)); 720 i++; 721 } 722 } 723 724 /** 725 * Flatten an Object array into the parcel at the current dataPosition(), 726 * growing dataCapacity() if needed. The array values are written using 727 * {@link #writeValue} and must follow the specification there. 728 */ 729 public final void writeArray(Object[] val) { 730 if (val == null) { 731 writeInt(-1); 732 return; 733 } 734 int N = val.length; 735 int i=0; 736 writeInt(N); 737 while (i < N) { 738 writeValue(val[i]); 739 i++; 740 } 741 } 742 743 /** 744 * Flatten a generic SparseArray into the parcel at the current 745 * dataPosition(), growing dataCapacity() if needed. The SparseArray 746 * values are written using {@link #writeValue} and must follow the 747 * specification there. 748 */ 749 public final void writeSparseArray(SparseArray<Object> val) { 750 if (val == null) { 751 writeInt(-1); 752 return; 753 } 754 int N = val.size(); 755 writeInt(N); 756 int i=0; 757 while (i < N) { 758 writeInt(val.keyAt(i)); 759 writeValue(val.valueAt(i)); 760 i++; 761 } 762 } 763 764 public final void writeSparseBooleanArray(SparseBooleanArray val) { 765 if (val == null) { 766 writeInt(-1); 767 return; 768 } 769 int N = val.size(); 770 writeInt(N); 771 int i=0; 772 while (i < N) { 773 writeInt(val.keyAt(i)); 774 writeByte((byte)(val.valueAt(i) ? 1 : 0)); 775 i++; 776 } 777 } 778 779 public final void writeBooleanArray(boolean[] val) { 780 if (val != null) { 781 int N = val.length; 782 writeInt(N); 783 for (int i=0; i<N; i++) { 784 writeInt(val[i] ? 1 : 0); 785 } 786 } else { 787 writeInt(-1); 788 } 789 } 790 791 public final boolean[] createBooleanArray() { 792 int N = readInt(); 793 // >>2 as a fast divide-by-4 works in the create*Array() functions 794 // because dataAvail() will never return a negative number. 4 is 795 // the size of a stored boolean in the stream. 796 if (N >= 0 && N <= (dataAvail() >> 2)) { 797 boolean[] val = new boolean[N]; 798 for (int i=0; i<N; i++) { 799 val[i] = readInt() != 0; 800 } 801 return val; 802 } else { 803 return null; 804 } 805 } 806 807 public final void readBooleanArray(boolean[] val) { 808 int N = readInt(); 809 if (N == val.length) { 810 for (int i=0; i<N; i++) { 811 val[i] = readInt() != 0; 812 } 813 } else { 814 throw new RuntimeException("bad array lengths"); 815 } 816 } 817 818 public final void writeCharArray(char[] val) { 819 if (val != null) { 820 int N = val.length; 821 writeInt(N); 822 for (int i=0; i<N; i++) { 823 writeInt((int)val[i]); 824 } 825 } else { 826 writeInt(-1); 827 } 828 } 829 830 public final char[] createCharArray() { 831 int N = readInt(); 832 if (N >= 0 && N <= (dataAvail() >> 2)) { 833 char[] val = new char[N]; 834 for (int i=0; i<N; i++) { 835 val[i] = (char)readInt(); 836 } 837 return val; 838 } else { 839 return null; 840 } 841 } 842 843 public final void readCharArray(char[] val) { 844 int N = readInt(); 845 if (N == val.length) { 846 for (int i=0; i<N; i++) { 847 val[i] = (char)readInt(); 848 } 849 } else { 850 throw new RuntimeException("bad array lengths"); 851 } 852 } 853 854 public final void writeIntArray(int[] val) { 855 if (val != null) { 856 int N = val.length; 857 writeInt(N); 858 for (int i=0; i<N; i++) { 859 writeInt(val[i]); 860 } 861 } else { 862 writeInt(-1); 863 } 864 } 865 866 public final int[] createIntArray() { 867 int N = readInt(); 868 if (N >= 0 && N <= (dataAvail() >> 2)) { 869 int[] val = new int[N]; 870 for (int i=0; i<N; i++) { 871 val[i] = readInt(); 872 } 873 return val; 874 } else { 875 return null; 876 } 877 } 878 879 public final void readIntArray(int[] val) { 880 int N = readInt(); 881 if (N == val.length) { 882 for (int i=0; i<N; i++) { 883 val[i] = readInt(); 884 } 885 } else { 886 throw new RuntimeException("bad array lengths"); 887 } 888 } 889 890 public final void writeLongArray(long[] val) { 891 if (val != null) { 892 int N = val.length; 893 writeInt(N); 894 for (int i=0; i<N; i++) { 895 writeLong(val[i]); 896 } 897 } else { 898 writeInt(-1); 899 } 900 } 901 902 public final long[] createLongArray() { 903 int N = readInt(); 904 // >>3 because stored longs are 64 bits 905 if (N >= 0 && N <= (dataAvail() >> 3)) { 906 long[] val = new long[N]; 907 for (int i=0; i<N; i++) { 908 val[i] = readLong(); 909 } 910 return val; 911 } else { 912 return null; 913 } 914 } 915 916 public final void readLongArray(long[] val) { 917 int N = readInt(); 918 if (N == val.length) { 919 for (int i=0; i<N; i++) { 920 val[i] = readLong(); 921 } 922 } else { 923 throw new RuntimeException("bad array lengths"); 924 } 925 } 926 927 public final void writeFloatArray(float[] val) { 928 if (val != null) { 929 int N = val.length; 930 writeInt(N); 931 for (int i=0; i<N; i++) { 932 writeFloat(val[i]); 933 } 934 } else { 935 writeInt(-1); 936 } 937 } 938 939 public final float[] createFloatArray() { 940 int N = readInt(); 941 // >>2 because stored floats are 4 bytes 942 if (N >= 0 && N <= (dataAvail() >> 2)) { 943 float[] val = new float[N]; 944 for (int i=0; i<N; i++) { 945 val[i] = readFloat(); 946 } 947 return val; 948 } else { 949 return null; 950 } 951 } 952 953 public final void readFloatArray(float[] val) { 954 int N = readInt(); 955 if (N == val.length) { 956 for (int i=0; i<N; i++) { 957 val[i] = readFloat(); 958 } 959 } else { 960 throw new RuntimeException("bad array lengths"); 961 } 962 } 963 964 public final void writeDoubleArray(double[] val) { 965 if (val != null) { 966 int N = val.length; 967 writeInt(N); 968 for (int i=0; i<N; i++) { 969 writeDouble(val[i]); 970 } 971 } else { 972 writeInt(-1); 973 } 974 } 975 976 public final double[] createDoubleArray() { 977 int N = readInt(); 978 // >>3 because stored doubles are 8 bytes 979 if (N >= 0 && N <= (dataAvail() >> 3)) { 980 double[] val = new double[N]; 981 for (int i=0; i<N; i++) { 982 val[i] = readDouble(); 983 } 984 return val; 985 } else { 986 return null; 987 } 988 } 989 990 public final void readDoubleArray(double[] val) { 991 int N = readInt(); 992 if (N == val.length) { 993 for (int i=0; i<N; i++) { 994 val[i] = readDouble(); 995 } 996 } else { 997 throw new RuntimeException("bad array lengths"); 998 } 999 } 1000 1001 public final void writeStringArray(String[] val) { 1002 if (val != null) { 1003 int N = val.length; 1004 writeInt(N); 1005 for (int i=0; i<N; i++) { 1006 writeString(val[i]); 1007 } 1008 } else { 1009 writeInt(-1); 1010 } 1011 } 1012 1013 public final String[] createStringArray() { 1014 int N = readInt(); 1015 if (N >= 0) { 1016 String[] val = new String[N]; 1017 for (int i=0; i<N; i++) { 1018 val[i] = readString(); 1019 } 1020 return val; 1021 } else { 1022 return null; 1023 } 1024 } 1025 1026 public final void readStringArray(String[] val) { 1027 int N = readInt(); 1028 if (N == val.length) { 1029 for (int i=0; i<N; i++) { 1030 val[i] = readString(); 1031 } 1032 } else { 1033 throw new RuntimeException("bad array lengths"); 1034 } 1035 } 1036 1037 public final void writeBinderArray(IBinder[] val) { 1038 if (val != null) { 1039 int N = val.length; 1040 writeInt(N); 1041 for (int i=0; i<N; i++) { 1042 writeStrongBinder(val[i]); 1043 } 1044 } else { 1045 writeInt(-1); 1046 } 1047 } 1048 1049 /** 1050 * @hide 1051 */ 1052 public final void writeCharSequenceArray(CharSequence[] val) { 1053 if (val != null) { 1054 int N = val.length; 1055 writeInt(N); 1056 for (int i=0; i<N; i++) { 1057 writeCharSequence(val[i]); 1058 } 1059 } else { 1060 writeInt(-1); 1061 } 1062 } 1063 1064 /** 1065 * @hide 1066 */ 1067 public final void writeCharSequenceList(ArrayList<CharSequence> val) { 1068 if (val != null) { 1069 int N = val.size(); 1070 writeInt(N); 1071 for (int i=0; i<N; i++) { 1072 writeCharSequence(val.get(i)); 1073 } 1074 } else { 1075 writeInt(-1); 1076 } 1077 } 1078 1079 public final IBinder[] createBinderArray() { 1080 int N = readInt(); 1081 if (N >= 0) { 1082 IBinder[] val = new IBinder[N]; 1083 for (int i=0; i<N; i++) { 1084 val[i] = readStrongBinder(); 1085 } 1086 return val; 1087 } else { 1088 return null; 1089 } 1090 } 1091 1092 public final void readBinderArray(IBinder[] val) { 1093 int N = readInt(); 1094 if (N == val.length) { 1095 for (int i=0; i<N; i++) { 1096 val[i] = readStrongBinder(); 1097 } 1098 } else { 1099 throw new RuntimeException("bad array lengths"); 1100 } 1101 } 1102 1103 /** 1104 * Flatten a List containing a particular object type into the parcel, at 1105 * the current dataPosition() and growing dataCapacity() if needed. The 1106 * type of the objects in the list must be one that implements Parcelable. 1107 * Unlike the generic writeList() method, however, only the raw data of the 1108 * objects is written and not their type, so you must use the corresponding 1109 * readTypedList() to unmarshall them. 1110 * 1111 * @param val The list of objects to be written. 1112 * 1113 * @see #createTypedArrayList 1114 * @see #readTypedList 1115 * @see Parcelable 1116 */ 1117 public final <T extends Parcelable> void writeTypedList(List<T> val) { 1118 if (val == null) { 1119 writeInt(-1); 1120 return; 1121 } 1122 int N = val.size(); 1123 int i=0; 1124 writeInt(N); 1125 while (i < N) { 1126 T item = val.get(i); 1127 if (item != null) { 1128 writeInt(1); 1129 item.writeToParcel(this, 0); 1130 } else { 1131 writeInt(0); 1132 } 1133 i++; 1134 } 1135 } 1136 1137 /** 1138 * Flatten a List containing String objects into the parcel, at 1139 * the current dataPosition() and growing dataCapacity() if needed. They 1140 * can later be retrieved with {@link #createStringArrayList} or 1141 * {@link #readStringList}. 1142 * 1143 * @param val The list of strings to be written. 1144 * 1145 * @see #createStringArrayList 1146 * @see #readStringList 1147 */ 1148 public final void writeStringList(List<String> val) { 1149 if (val == null) { 1150 writeInt(-1); 1151 return; 1152 } 1153 int N = val.size(); 1154 int i=0; 1155 writeInt(N); 1156 while (i < N) { 1157 writeString(val.get(i)); 1158 i++; 1159 } 1160 } 1161 1162 /** 1163 * Flatten a List containing IBinder objects into the parcel, at 1164 * the current dataPosition() and growing dataCapacity() if needed. They 1165 * can later be retrieved with {@link #createBinderArrayList} or 1166 * {@link #readBinderList}. 1167 * 1168 * @param val The list of strings to be written. 1169 * 1170 * @see #createBinderArrayList 1171 * @see #readBinderList 1172 */ 1173 public final void writeBinderList(List<IBinder> val) { 1174 if (val == null) { 1175 writeInt(-1); 1176 return; 1177 } 1178 int N = val.size(); 1179 int i=0; 1180 writeInt(N); 1181 while (i < N) { 1182 writeStrongBinder(val.get(i)); 1183 i++; 1184 } 1185 } 1186 1187 /** 1188 * Flatten a heterogeneous array containing a particular object type into 1189 * the parcel, at 1190 * the current dataPosition() and growing dataCapacity() if needed. The 1191 * type of the objects in the array must be one that implements Parcelable. 1192 * Unlike the {@link #writeParcelableArray} method, however, only the 1193 * raw data of the objects is written and not their type, so you must use 1194 * {@link #readTypedArray} with the correct corresponding 1195 * {@link Parcelable.Creator} implementation to unmarshall them. 1196 * 1197 * @param val The array of objects to be written. 1198 * @param parcelableFlags Contextual flags as per 1199 * {@link Parcelable#writeToParcel(Parcel, int) Parcelable.writeToParcel()}. 1200 * 1201 * @see #readTypedArray 1202 * @see #writeParcelableArray 1203 * @see Parcelable.Creator 1204 */ 1205 public final <T extends Parcelable> void writeTypedArray(T[] val, 1206 int parcelableFlags) { 1207 if (val != null) { 1208 int N = val.length; 1209 writeInt(N); 1210 for (int i=0; i<N; i++) { 1211 T item = val[i]; 1212 if (item != null) { 1213 writeInt(1); 1214 item.writeToParcel(this, parcelableFlags); 1215 } else { 1216 writeInt(0); 1217 } 1218 } 1219 } else { 1220 writeInt(-1); 1221 } 1222 } 1223 1224 /** 1225 * Flatten a generic object in to a parcel. The given Object value may 1226 * currently be one of the following types: 1227 * 1228 * <ul> 1229 * <li> null 1230 * <li> String 1231 * <li> Byte 1232 * <li> Short 1233 * <li> Integer 1234 * <li> Long 1235 * <li> Float 1236 * <li> Double 1237 * <li> Boolean 1238 * <li> String[] 1239 * <li> boolean[] 1240 * <li> byte[] 1241 * <li> int[] 1242 * <li> long[] 1243 * <li> Object[] (supporting objects of the same type defined here). 1244 * <li> {@link Bundle} 1245 * <li> Map (as supported by {@link #writeMap}). 1246 * <li> Any object that implements the {@link Parcelable} protocol. 1247 * <li> Parcelable[] 1248 * <li> CharSequence (as supported by {@link TextUtils#writeToParcel}). 1249 * <li> List (as supported by {@link #writeList}). 1250 * <li> {@link SparseArray} (as supported by {@link #writeSparseArray(SparseArray)}). 1251 * <li> {@link IBinder} 1252 * <li> Any object that implements Serializable (but see 1253 * {@link #writeSerializable} for caveats). Note that all of the 1254 * previous types have relatively efficient implementations for 1255 * writing to a Parcel; having to rely on the generic serialization 1256 * approach is much less efficient and should be avoided whenever 1257 * possible. 1258 * </ul> 1259 * 1260 * <p class="caution">{@link Parcelable} objects are written with 1261 * {@link Parcelable#writeToParcel} using contextual flags of 0. When 1262 * serializing objects containing {@link ParcelFileDescriptor}s, 1263 * this may result in file descriptor leaks when they are returned from 1264 * Binder calls (where {@link Parcelable#PARCELABLE_WRITE_RETURN_VALUE} 1265 * should be used).</p> 1266 */ 1267 public final void writeValue(Object v) { 1268 if (v == null) { 1269 writeInt(VAL_NULL); 1270 } else if (v instanceof String) { 1271 writeInt(VAL_STRING); 1272 writeString((String) v); 1273 } else if (v instanceof Integer) { 1274 writeInt(VAL_INTEGER); 1275 writeInt((Integer) v); 1276 } else if (v instanceof Map) { 1277 writeInt(VAL_MAP); 1278 writeMap((Map) v); 1279 } else if (v instanceof Bundle) { 1280 // Must be before Parcelable 1281 writeInt(VAL_BUNDLE); 1282 writeBundle((Bundle) v); 1283 } else if (v instanceof Parcelable) { 1284 writeInt(VAL_PARCELABLE); 1285 writeParcelable((Parcelable) v, 0); 1286 } else if (v instanceof Short) { 1287 writeInt(VAL_SHORT); 1288 writeInt(((Short) v).intValue()); 1289 } else if (v instanceof Long) { 1290 writeInt(VAL_LONG); 1291 writeLong((Long) v); 1292 } else if (v instanceof Float) { 1293 writeInt(VAL_FLOAT); 1294 writeFloat((Float) v); 1295 } else if (v instanceof Double) { 1296 writeInt(VAL_DOUBLE); 1297 writeDouble((Double) v); 1298 } else if (v instanceof Boolean) { 1299 writeInt(VAL_BOOLEAN); 1300 writeInt((Boolean) v ? 1 : 0); 1301 } else if (v instanceof CharSequence) { 1302 // Must be after String 1303 writeInt(VAL_CHARSEQUENCE); 1304 writeCharSequence((CharSequence) v); 1305 } else if (v instanceof List) { 1306 writeInt(VAL_LIST); 1307 writeList((List) v); 1308 } else if (v instanceof SparseArray) { 1309 writeInt(VAL_SPARSEARRAY); 1310 writeSparseArray((SparseArray) v); 1311 } else if (v instanceof boolean[]) { 1312 writeInt(VAL_BOOLEANARRAY); 1313 writeBooleanArray((boolean[]) v); 1314 } else if (v instanceof byte[]) { 1315 writeInt(VAL_BYTEARRAY); 1316 writeByteArray((byte[]) v); 1317 } else if (v instanceof String[]) { 1318 writeInt(VAL_STRINGARRAY); 1319 writeStringArray((String[]) v); 1320 } else if (v instanceof CharSequence[]) { 1321 // Must be after String[] and before Object[] 1322 writeInt(VAL_CHARSEQUENCEARRAY); 1323 writeCharSequenceArray((CharSequence[]) v); 1324 } else if (v instanceof IBinder) { 1325 writeInt(VAL_IBINDER); 1326 writeStrongBinder((IBinder) v); 1327 } else if (v instanceof Parcelable[]) { 1328 writeInt(VAL_PARCELABLEARRAY); 1329 writeParcelableArray((Parcelable[]) v, 0); 1330 } else if (v instanceof int[]) { 1331 writeInt(VAL_INTARRAY); 1332 writeIntArray((int[]) v); 1333 } else if (v instanceof long[]) { 1334 writeInt(VAL_LONGARRAY); 1335 writeLongArray((long[]) v); 1336 } else if (v instanceof Byte) { 1337 writeInt(VAL_BYTE); 1338 writeInt((Byte) v); 1339 } else if (v instanceof PersistableBundle) { 1340 writeInt(VAL_PERSISTABLEBUNDLE); 1341 writePersistableBundle((PersistableBundle) v); 1342 } else if (v instanceof Size) { 1343 writeInt(VAL_SIZE); 1344 writeSize((Size) v); 1345 } else if (v instanceof SizeF) { 1346 writeInt(VAL_SIZEF); 1347 writeSizeF((SizeF) v); 1348 } else { 1349 Class<?> clazz = v.getClass(); 1350 if (clazz.isArray() && clazz.getComponentType() == Object.class) { 1351 // Only pure Object[] are written here, Other arrays of non-primitive types are 1352 // handled by serialization as this does not record the component type. 1353 writeInt(VAL_OBJECTARRAY); 1354 writeArray((Object[]) v); 1355 } else if (v instanceof Serializable) { 1356 // Must be last 1357 writeInt(VAL_SERIALIZABLE); 1358 writeSerializable((Serializable) v); 1359 } else { 1360 throw new RuntimeException("Parcel: unable to marshal value " + v); 1361 } 1362 } 1363 } 1364 1365 /** 1366 * Flatten the name of the class of the Parcelable and its contents 1367 * into the parcel. 1368 * 1369 * @param p The Parcelable object to be written. 1370 * @param parcelableFlags Contextual flags as per 1371 * {@link Parcelable#writeToParcel(Parcel, int) Parcelable.writeToParcel()}. 1372 */ 1373 public final void writeParcelable(Parcelable p, int parcelableFlags) { 1374 if (p == null) { 1375 writeString(null); 1376 return; 1377 } 1378 String name = p.getClass().getName(); 1379 writeString(name); 1380 p.writeToParcel(this, parcelableFlags); 1381 } 1382 1383 /** @hide */ 1384 public final void writeParcelableCreator(Parcelable p) { 1385 String name = p.getClass().getName(); 1386 writeString(name); 1387 } 1388 1389 /** 1390 * Write a generic serializable object in to a Parcel. It is strongly 1391 * recommended that this method be avoided, since the serialization 1392 * overhead is extremely large, and this approach will be much slower than 1393 * using the other approaches to writing data in to a Parcel. 1394 */ 1395 public final void writeSerializable(Serializable s) { 1396 if (s == null) { 1397 writeString(null); 1398 return; 1399 } 1400 String name = s.getClass().getName(); 1401 writeString(name); 1402 1403 ByteArrayOutputStream baos = new ByteArrayOutputStream(); 1404 try { 1405 ObjectOutputStream oos = new ObjectOutputStream(baos); 1406 oos.writeObject(s); 1407 oos.close(); 1408 1409 writeByteArray(baos.toByteArray()); 1410 } catch (IOException ioe) { 1411 throw new RuntimeException("Parcelable encountered " + 1412 "IOException writing serializable object (name = " + name + 1413 ")", ioe); 1414 } 1415 } 1416 1417 /** 1418 * Special function for writing an exception result at the header of 1419 * a parcel, to be used when returning an exception from a transaction. 1420 * Note that this currently only supports a few exception types; any other 1421 * exception will be re-thrown by this function as a RuntimeException 1422 * (to be caught by the system's last-resort exception handling when 1423 * dispatching a transaction). 1424 * 1425 * <p>The supported exception types are: 1426 * <ul> 1427 * <li>{@link BadParcelableException} 1428 * <li>{@link IllegalArgumentException} 1429 * <li>{@link IllegalStateException} 1430 * <li>{@link NullPointerException} 1431 * <li>{@link SecurityException} 1432 * <li>{@link NetworkOnMainThreadException} 1433 * </ul> 1434 * 1435 * @param e The Exception to be written. 1436 * 1437 * @see #writeNoException 1438 * @see #readException 1439 */ 1440 public final void writeException(Exception e) { 1441 int code = 0; 1442 if (e instanceof SecurityException) { 1443 code = EX_SECURITY; 1444 } else if (e instanceof BadParcelableException) { 1445 code = EX_BAD_PARCELABLE; 1446 } else if (e instanceof IllegalArgumentException) { 1447 code = EX_ILLEGAL_ARGUMENT; 1448 } else if (e instanceof NullPointerException) { 1449 code = EX_NULL_POINTER; 1450 } else if (e instanceof IllegalStateException) { 1451 code = EX_ILLEGAL_STATE; 1452 } else if (e instanceof NetworkOnMainThreadException) { 1453 code = EX_NETWORK_MAIN_THREAD; 1454 } else if (e instanceof UnsupportedOperationException) { 1455 code = EX_UNSUPPORTED_OPERATION; 1456 } 1457 writeInt(code); 1458 StrictMode.clearGatheredViolations(); 1459 if (code == 0) { 1460 if (e instanceof RuntimeException) { 1461 throw (RuntimeException) e; 1462 } 1463 throw new RuntimeException(e); 1464 } 1465 writeString(e.getMessage()); 1466 } 1467 1468 /** 1469 * Special function for writing information at the front of the Parcel 1470 * indicating that no exception occurred. 1471 * 1472 * @see #writeException 1473 * @see #readException 1474 */ 1475 public final void writeNoException() { 1476 // Despite the name of this function ("write no exception"), 1477 // it should instead be thought of as "write the RPC response 1478 // header", but because this function name is written out by 1479 // the AIDL compiler, we're not going to rename it. 1480 // 1481 // The response header, in the non-exception case (see also 1482 // writeException above, also called by the AIDL compiler), is 1483 // either a 0 (the default case), or EX_HAS_REPLY_HEADER if 1484 // StrictMode has gathered up violations that have occurred 1485 // during a Binder call, in which case we write out the number 1486 // of violations and their details, serialized, before the 1487 // actual RPC respons data. The receiving end of this is 1488 // readException(), below. 1489 if (StrictMode.hasGatheredViolations()) { 1490 writeInt(EX_HAS_REPLY_HEADER); 1491 final int sizePosition = dataPosition(); 1492 writeInt(0); // total size of fat header, to be filled in later 1493 StrictMode.writeGatheredViolationsToParcel(this); 1494 final int payloadPosition = dataPosition(); 1495 setDataPosition(sizePosition); 1496 writeInt(payloadPosition - sizePosition); // header size 1497 setDataPosition(payloadPosition); 1498 } else { 1499 writeInt(0); 1500 } 1501 } 1502 1503 /** 1504 * Special function for reading an exception result from the header of 1505 * a parcel, to be used after receiving the result of a transaction. This 1506 * will throw the exception for you if it had been written to the Parcel, 1507 * otherwise return and let you read the normal result data from the Parcel. 1508 * 1509 * @see #writeException 1510 * @see #writeNoException 1511 */ 1512 public final void readException() { 1513 int code = readExceptionCode(); 1514 if (code != 0) { 1515 String msg = readString(); 1516 readException(code, msg); 1517 } 1518 } 1519 1520 /** 1521 * Parses the header of a Binder call's response Parcel and 1522 * returns the exception code. Deals with lite or fat headers. 1523 * In the common successful case, this header is generally zero. 1524 * In less common cases, it's a small negative number and will be 1525 * followed by an error string. 1526 * 1527 * This exists purely for android.database.DatabaseUtils and 1528 * insulating it from having to handle fat headers as returned by 1529 * e.g. StrictMode-induced RPC responses. 1530 * 1531 * @hide 1532 */ 1533 public final int readExceptionCode() { 1534 int code = readInt(); 1535 if (code == EX_HAS_REPLY_HEADER) { 1536 int headerSize = readInt(); 1537 if (headerSize == 0) { 1538 Log.e(TAG, "Unexpected zero-sized Parcel reply header."); 1539 } else { 1540 // Currently the only thing in the header is StrictMode stacks, 1541 // but discussions around event/RPC tracing suggest we might 1542 // put that here too. If so, switch on sub-header tags here. 1543 // But for now, just parse out the StrictMode stuff. 1544 StrictMode.readAndHandleBinderCallViolations(this); 1545 } 1546 // And fat response headers are currently only used when 1547 // there are no exceptions, so return no error: 1548 return 0; 1549 } 1550 return code; 1551 } 1552 1553 /** 1554 * Throw an exception with the given message. Not intended for use 1555 * outside the Parcel class. 1556 * 1557 * @param code Used to determine which exception class to throw. 1558 * @param msg The exception message. 1559 */ 1560 public final void readException(int code, String msg) { 1561 switch (code) { 1562 case EX_SECURITY: 1563 throw new SecurityException(msg); 1564 case EX_BAD_PARCELABLE: 1565 throw new BadParcelableException(msg); 1566 case EX_ILLEGAL_ARGUMENT: 1567 throw new IllegalArgumentException(msg); 1568 case EX_NULL_POINTER: 1569 throw new NullPointerException(msg); 1570 case EX_ILLEGAL_STATE: 1571 throw new IllegalStateException(msg); 1572 case EX_NETWORK_MAIN_THREAD: 1573 throw new NetworkOnMainThreadException(); 1574 case EX_UNSUPPORTED_OPERATION: 1575 throw new UnsupportedOperationException(msg); 1576 } 1577 throw new RuntimeException("Unknown exception code: " + code 1578 + " msg " + msg); 1579 } 1580 1581 /** 1582 * Read an integer value from the parcel at the current dataPosition(). 1583 */ 1584 public final int readInt() { 1585 return nativeReadInt(mNativePtr); 1586 } 1587 1588 /** 1589 * Read a long integer value from the parcel at the current dataPosition(). 1590 */ 1591 public final long readLong() { 1592 return nativeReadLong(mNativePtr); 1593 } 1594 1595 /** 1596 * Read a floating point value from the parcel at the current 1597 * dataPosition(). 1598 */ 1599 public final float readFloat() { 1600 return nativeReadFloat(mNativePtr); 1601 } 1602 1603 /** 1604 * Read a double precision floating point value from the parcel at the 1605 * current dataPosition(). 1606 */ 1607 public final double readDouble() { 1608 return nativeReadDouble(mNativePtr); 1609 } 1610 1611 /** 1612 * Read a string value from the parcel at the current dataPosition(). 1613 */ 1614 public final String readString() { 1615 return nativeReadString(mNativePtr); 1616 } 1617 1618 /** 1619 * Read a CharSequence value from the parcel at the current dataPosition(). 1620 * @hide 1621 */ 1622 public final CharSequence readCharSequence() { 1623 return TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(this); 1624 } 1625 1626 /** 1627 * Read an object from the parcel at the current dataPosition(). 1628 */ 1629 public final IBinder readStrongBinder() { 1630 return nativeReadStrongBinder(mNativePtr); 1631 } 1632 1633 /** 1634 * Read a FileDescriptor from the parcel at the current dataPosition(). 1635 */ 1636 public final ParcelFileDescriptor readFileDescriptor() { 1637 FileDescriptor fd = nativeReadFileDescriptor(mNativePtr); 1638 return fd != null ? new ParcelFileDescriptor(fd) : null; 1639 } 1640 1641 /** {@hide} */ 1642 public final FileDescriptor readRawFileDescriptor() { 1643 return nativeReadFileDescriptor(mNativePtr); 1644 } 1645 1646 /*package*/ static native FileDescriptor openFileDescriptor(String file, 1647 int mode) throws FileNotFoundException; 1648 /*package*/ static native FileDescriptor dupFileDescriptor(FileDescriptor orig) 1649 throws IOException; 1650 /*package*/ static native void closeFileDescriptor(FileDescriptor desc) 1651 throws IOException; 1652 /*package*/ static native void clearFileDescriptor(FileDescriptor desc); 1653 1654 /** 1655 * Read a byte value from the parcel at the current dataPosition(). 1656 */ 1657 public final byte readByte() { 1658 return (byte)(readInt() & 0xff); 1659 } 1660 1661 /** 1662 * Please use {@link #readBundle(ClassLoader)} instead (whose data must have 1663 * been written with {@link #writeBundle}. Read into an existing Map object 1664 * from the parcel at the current dataPosition(). 1665 */ 1666 public final void readMap(Map outVal, ClassLoader loader) { 1667 int N = readInt(); 1668 readMapInternal(outVal, N, loader); 1669 } 1670 1671 /** 1672 * Read into an existing List object from the parcel at the current 1673 * dataPosition(), using the given class loader to load any enclosed 1674 * Parcelables. If it is null, the default class loader is used. 1675 */ 1676 public final void readList(List outVal, ClassLoader loader) { 1677 int N = readInt(); 1678 readListInternal(outVal, N, loader); 1679 } 1680 1681 /** 1682 * Please use {@link #readBundle(ClassLoader)} instead (whose data must have 1683 * been written with {@link #writeBundle}. Read and return a new HashMap 1684 * object from the parcel at the current dataPosition(), using the given 1685 * class loader to load any enclosed Parcelables. Returns null if 1686 * the previously written map object was null. 1687 */ 1688 public final HashMap readHashMap(ClassLoader loader) 1689 { 1690 int N = readInt(); 1691 if (N < 0) { 1692 return null; 1693 } 1694 HashMap m = new HashMap(N); 1695 readMapInternal(m, N, loader); 1696 return m; 1697 } 1698 1699 /** 1700 * Read and return a new Bundle object from the parcel at the current 1701 * dataPosition(). Returns null if the previously written Bundle object was 1702 * null. 1703 */ 1704 public final Bundle readBundle() { 1705 return readBundle(null); 1706 } 1707 1708 /** 1709 * Read and return a new Bundle object from the parcel at the current 1710 * dataPosition(), using the given class loader to initialize the class 1711 * loader of the Bundle for later retrieval of Parcelable objects. 1712 * Returns null if the previously written Bundle object was null. 1713 */ 1714 public final Bundle readBundle(ClassLoader loader) { 1715 int length = readInt(); 1716 if (length < 0) { 1717 if (Bundle.DEBUG) Log.d(TAG, "null bundle: length=" + length); 1718 return null; 1719 } 1720 1721 final Bundle bundle = new Bundle(this, length); 1722 if (loader != null) { 1723 bundle.setClassLoader(loader); 1724 } 1725 return bundle; 1726 } 1727 1728 /** 1729 * Read and return a new Bundle object from the parcel at the current 1730 * dataPosition(). Returns null if the previously written Bundle object was 1731 * null. 1732 */ 1733 public final PersistableBundle readPersistableBundle() { 1734 return readPersistableBundle(null); 1735 } 1736 1737 /** 1738 * Read and return a new Bundle object from the parcel at the current 1739 * dataPosition(), using the given class loader to initialize the class 1740 * loader of the Bundle for later retrieval of Parcelable objects. 1741 * Returns null if the previously written Bundle object was null. 1742 */ 1743 public final PersistableBundle readPersistableBundle(ClassLoader loader) { 1744 int length = readInt(); 1745 if (length < 0) { 1746 if (Bundle.DEBUG) Log.d(TAG, "null bundle: length=" + length); 1747 return null; 1748 } 1749 1750 final PersistableBundle bundle = new PersistableBundle(this, length); 1751 if (loader != null) { 1752 bundle.setClassLoader(loader); 1753 } 1754 return bundle; 1755 } 1756 1757 /** 1758 * Read a Size from the parcel at the current dataPosition(). 1759 */ 1760 public final Size readSize() { 1761 final int width = readInt(); 1762 final int height = readInt(); 1763 return new Size(width, height); 1764 } 1765 1766 /** 1767 * Read a SizeF from the parcel at the current dataPosition(). 1768 */ 1769 public final SizeF readSizeF() { 1770 final float width = readFloat(); 1771 final float height = readFloat(); 1772 return new SizeF(width, height); 1773 } 1774 1775 /** 1776 * Read and return a byte[] object from the parcel. 1777 */ 1778 public final byte[] createByteArray() { 1779 return nativeCreateByteArray(mNativePtr); 1780 } 1781 1782 /** 1783 * Read a byte[] object from the parcel and copy it into the 1784 * given byte array. 1785 */ 1786 public final void readByteArray(byte[] val) { 1787 // TODO: make this a native method to avoid the extra copy. 1788 byte[] ba = createByteArray(); 1789 if (ba.length == val.length) { 1790 System.arraycopy(ba, 0, val, 0, ba.length); 1791 } else { 1792 throw new RuntimeException("bad array lengths"); 1793 } 1794 } 1795 1796 /** 1797 * Read a blob of data from the parcel and return it as a byte array. 1798 * {@hide} 1799 * {@SystemApi} 1800 */ 1801 public final byte[] readBlob() { 1802 return nativeReadBlob(mNativePtr); 1803 } 1804 1805 /** 1806 * Read and return a String[] object from the parcel. 1807 * {@hide} 1808 */ 1809 public final String[] readStringArray() { 1810 String[] array = null; 1811 1812 int length = readInt(); 1813 if (length >= 0) 1814 { 1815 array = new String[length]; 1816 1817 for (int i = 0 ; i < length ; i++) 1818 { 1819 array[i] = readString(); 1820 } 1821 } 1822 1823 return array; 1824 } 1825 1826 /** 1827 * Read and return a CharSequence[] object from the parcel. 1828 * {@hide} 1829 */ 1830 public final CharSequence[] readCharSequenceArray() { 1831 CharSequence[] array = null; 1832 1833 int length = readInt(); 1834 if (length >= 0) 1835 { 1836 array = new CharSequence[length]; 1837 1838 for (int i = 0 ; i < length ; i++) 1839 { 1840 array[i] = readCharSequence(); 1841 } 1842 } 1843 1844 return array; 1845 } 1846 1847 /** 1848 * Read and return an ArrayList<CharSequence> object from the parcel. 1849 * {@hide} 1850 */ 1851 public final ArrayList<CharSequence> readCharSequenceList() { 1852 ArrayList<CharSequence> array = null; 1853 1854 int length = readInt(); 1855 if (length >= 0) { 1856 array = new ArrayList<CharSequence>(length); 1857 1858 for (int i = 0 ; i < length ; i++) { 1859 array.add(readCharSequence()); 1860 } 1861 } 1862 1863 return array; 1864 } 1865 1866 /** 1867 * Read and return a new ArrayList object from the parcel at the current 1868 * dataPosition(). Returns null if the previously written list object was 1869 * null. The given class loader will be used to load any enclosed 1870 * Parcelables. 1871 */ 1872 public final ArrayList readArrayList(ClassLoader loader) { 1873 int N = readInt(); 1874 if (N < 0) { 1875 return null; 1876 } 1877 ArrayList l = new ArrayList(N); 1878 readListInternal(l, N, loader); 1879 return l; 1880 } 1881 1882 /** 1883 * Read and return a new Object array from the parcel at the current 1884 * dataPosition(). Returns null if the previously written array was 1885 * null. The given class loader will be used to load any enclosed 1886 * Parcelables. 1887 */ 1888 public final Object[] readArray(ClassLoader loader) { 1889 int N = readInt(); 1890 if (N < 0) { 1891 return null; 1892 } 1893 Object[] l = new Object[N]; 1894 readArrayInternal(l, N, loader); 1895 return l; 1896 } 1897 1898 /** 1899 * Read and return a new SparseArray object from the parcel at the current 1900 * dataPosition(). Returns null if the previously written list object was 1901 * null. The given class loader will be used to load any enclosed 1902 * Parcelables. 1903 */ 1904 public final SparseArray readSparseArray(ClassLoader loader) { 1905 int N = readInt(); 1906 if (N < 0) { 1907 return null; 1908 } 1909 SparseArray sa = new SparseArray(N); 1910 readSparseArrayInternal(sa, N, loader); 1911 return sa; 1912 } 1913 1914 /** 1915 * Read and return a new SparseBooleanArray object from the parcel at the current 1916 * dataPosition(). Returns null if the previously written list object was 1917 * null. 1918 */ 1919 public final SparseBooleanArray readSparseBooleanArray() { 1920 int N = readInt(); 1921 if (N < 0) { 1922 return null; 1923 } 1924 SparseBooleanArray sa = new SparseBooleanArray(N); 1925 readSparseBooleanArrayInternal(sa, N); 1926 return sa; 1927 } 1928 1929 /** 1930 * Read and return a new ArrayList containing a particular object type from 1931 * the parcel that was written with {@link #writeTypedList} at the 1932 * current dataPosition(). Returns null if the 1933 * previously written list object was null. The list <em>must</em> have 1934 * previously been written via {@link #writeTypedList} with the same object 1935 * type. 1936 * 1937 * @return A newly created ArrayList containing objects with the same data 1938 * as those that were previously written. 1939 * 1940 * @see #writeTypedList 1941 */ 1942 public final <T> ArrayList<T> createTypedArrayList(Parcelable.Creator<T> c) { 1943 int N = readInt(); 1944 if (N < 0) { 1945 return null; 1946 } 1947 ArrayList<T> l = new ArrayList<T>(N); 1948 while (N > 0) { 1949 if (readInt() != 0) { 1950 l.add(c.createFromParcel(this)); 1951 } else { 1952 l.add(null); 1953 } 1954 N--; 1955 } 1956 return l; 1957 } 1958 1959 /** 1960 * Read into the given List items containing a particular object type 1961 * that were written with {@link #writeTypedList} at the 1962 * current dataPosition(). The list <em>must</em> have 1963 * previously been written via {@link #writeTypedList} with the same object 1964 * type. 1965 * 1966 * @return A newly created ArrayList containing objects with the same data 1967 * as those that were previously written. 1968 * 1969 * @see #writeTypedList 1970 */ 1971 public final <T> void readTypedList(List<T> list, Parcelable.Creator<T> c) { 1972 int M = list.size(); 1973 int N = readInt(); 1974 int i = 0; 1975 for (; i < M && i < N; i++) { 1976 if (readInt() != 0) { 1977 list.set(i, c.createFromParcel(this)); 1978 } else { 1979 list.set(i, null); 1980 } 1981 } 1982 for (; i<N; i++) { 1983 if (readInt() != 0) { 1984 list.add(c.createFromParcel(this)); 1985 } else { 1986 list.add(null); 1987 } 1988 } 1989 for (; i<M; i++) { 1990 list.remove(N); 1991 } 1992 } 1993 1994 /** 1995 * Read and return a new ArrayList containing String objects from 1996 * the parcel that was written with {@link #writeStringList} at the 1997 * current dataPosition(). Returns null if the 1998 * previously written list object was null. 1999 * 2000 * @return A newly created ArrayList containing strings with the same data 2001 * as those that were previously written. 2002 * 2003 * @see #writeStringList 2004 */ 2005 public final ArrayList<String> createStringArrayList() { 2006 int N = readInt(); 2007 if (N < 0) { 2008 return null; 2009 } 2010 ArrayList<String> l = new ArrayList<String>(N); 2011 while (N > 0) { 2012 l.add(readString()); 2013 N--; 2014 } 2015 return l; 2016 } 2017 2018 /** 2019 * Read and return a new ArrayList containing IBinder objects from 2020 * the parcel that was written with {@link #writeBinderList} at the 2021 * current dataPosition(). Returns null if the 2022 * previously written list object was null. 2023 * 2024 * @return A newly created ArrayList containing strings with the same data 2025 * as those that were previously written. 2026 * 2027 * @see #writeBinderList 2028 */ 2029 public final ArrayList<IBinder> createBinderArrayList() { 2030 int N = readInt(); 2031 if (N < 0) { 2032 return null; 2033 } 2034 ArrayList<IBinder> l = new ArrayList<IBinder>(N); 2035 while (N > 0) { 2036 l.add(readStrongBinder()); 2037 N--; 2038 } 2039 return l; 2040 } 2041 2042 /** 2043 * Read into the given List items String objects that were written with 2044 * {@link #writeStringList} at the current dataPosition(). 2045 * 2046 * @return A newly created ArrayList containing strings with the same data 2047 * as those that were previously written. 2048 * 2049 * @see #writeStringList 2050 */ 2051 public final void readStringList(List<String> list) { 2052 int M = list.size(); 2053 int N = readInt(); 2054 int i = 0; 2055 for (; i < M && i < N; i++) { 2056 list.set(i, readString()); 2057 } 2058 for (; i<N; i++) { 2059 list.add(readString()); 2060 } 2061 for (; i<M; i++) { 2062 list.remove(N); 2063 } 2064 } 2065 2066 /** 2067 * Read into the given List items IBinder objects that were written with 2068 * {@link #writeBinderList} at the current dataPosition(). 2069 * 2070 * @return A newly created ArrayList containing strings with the same data 2071 * as those that were previously written. 2072 * 2073 * @see #writeBinderList 2074 */ 2075 public final void readBinderList(List<IBinder> list) { 2076 int M = list.size(); 2077 int N = readInt(); 2078 int i = 0; 2079 for (; i < M && i < N; i++) { 2080 list.set(i, readStrongBinder()); 2081 } 2082 for (; i<N; i++) { 2083 list.add(readStrongBinder()); 2084 } 2085 for (; i<M; i++) { 2086 list.remove(N); 2087 } 2088 } 2089 2090 /** 2091 * Read and return a new array containing a particular object type from 2092 * the parcel at the current dataPosition(). Returns null if the 2093 * previously written array was null. The array <em>must</em> have 2094 * previously been written via {@link #writeTypedArray} with the same 2095 * object type. 2096 * 2097 * @return A newly created array containing objects with the same data 2098 * as those that were previously written. 2099 * 2100 * @see #writeTypedArray 2101 */ 2102 public final <T> T[] createTypedArray(Parcelable.Creator<T> c) { 2103 int N = readInt(); 2104 if (N < 0) { 2105 return null; 2106 } 2107 T[] l = c.newArray(N); 2108 for (int i=0; i<N; i++) { 2109 if (readInt() != 0) { 2110 l[i] = c.createFromParcel(this); 2111 } 2112 } 2113 return l; 2114 } 2115 2116 public final <T> void readTypedArray(T[] val, Parcelable.Creator<T> c) { 2117 int N = readInt(); 2118 if (N == val.length) { 2119 for (int i=0; i<N; i++) { 2120 if (readInt() != 0) { 2121 val[i] = c.createFromParcel(this); 2122 } else { 2123 val[i] = null; 2124 } 2125 } 2126 } else { 2127 throw new RuntimeException("bad array lengths"); 2128 } 2129 } 2130 2131 /** 2132 * @deprecated 2133 * @hide 2134 */ 2135 @Deprecated 2136 public final <T> T[] readTypedArray(Parcelable.Creator<T> c) { 2137 return createTypedArray(c); 2138 } 2139 2140 /** 2141 * Write a heterogeneous array of Parcelable objects into the Parcel. 2142 * Each object in the array is written along with its class name, so 2143 * that the correct class can later be instantiated. As a result, this 2144 * has significantly more overhead than {@link #writeTypedArray}, but will 2145 * correctly handle an array containing more than one type of object. 2146 * 2147 * @param value The array of objects to be written. 2148 * @param parcelableFlags Contextual flags as per 2149 * {@link Parcelable#writeToParcel(Parcel, int) Parcelable.writeToParcel()}. 2150 * 2151 * @see #writeTypedArray 2152 */ 2153 public final <T extends Parcelable> void writeParcelableArray(T[] value, 2154 int parcelableFlags) { 2155 if (value != null) { 2156 int N = value.length; 2157 writeInt(N); 2158 for (int i=0; i<N; i++) { 2159 writeParcelable(value[i], parcelableFlags); 2160 } 2161 } else { 2162 writeInt(-1); 2163 } 2164 } 2165 2166 /** 2167 * Read a typed object from a parcel. The given class loader will be 2168 * used to load any enclosed Parcelables. If it is null, the default class 2169 * loader will be used. 2170 */ 2171 public final Object readValue(ClassLoader loader) { 2172 int type = readInt(); 2173 2174 switch (type) { 2175 case VAL_NULL: 2176 return null; 2177 2178 case VAL_STRING: 2179 return readString(); 2180 2181 case VAL_INTEGER: 2182 return readInt(); 2183 2184 case VAL_MAP: 2185 return readHashMap(loader); 2186 2187 case VAL_PARCELABLE: 2188 return readParcelable(loader); 2189 2190 case VAL_SHORT: 2191 return (short) readInt(); 2192 2193 case VAL_LONG: 2194 return readLong(); 2195 2196 case VAL_FLOAT: 2197 return readFloat(); 2198 2199 case VAL_DOUBLE: 2200 return readDouble(); 2201 2202 case VAL_BOOLEAN: 2203 return readInt() == 1; 2204 2205 case VAL_CHARSEQUENCE: 2206 return readCharSequence(); 2207 2208 case VAL_LIST: 2209 return readArrayList(loader); 2210 2211 case VAL_BOOLEANARRAY: 2212 return createBooleanArray(); 2213 2214 case VAL_BYTEARRAY: 2215 return createByteArray(); 2216 2217 case VAL_STRINGARRAY: 2218 return readStringArray(); 2219 2220 case VAL_CHARSEQUENCEARRAY: 2221 return readCharSequenceArray(); 2222 2223 case VAL_IBINDER: 2224 return readStrongBinder(); 2225 2226 case VAL_OBJECTARRAY: 2227 return readArray(loader); 2228 2229 case VAL_INTARRAY: 2230 return createIntArray(); 2231 2232 case VAL_LONGARRAY: 2233 return createLongArray(); 2234 2235 case VAL_BYTE: 2236 return readByte(); 2237 2238 case VAL_SERIALIZABLE: 2239 return readSerializable(loader); 2240 2241 case VAL_PARCELABLEARRAY: 2242 return readParcelableArray(loader); 2243 2244 case VAL_SPARSEARRAY: 2245 return readSparseArray(loader); 2246 2247 case VAL_SPARSEBOOLEANARRAY: 2248 return readSparseBooleanArray(); 2249 2250 case VAL_BUNDLE: 2251 return readBundle(loader); // loading will be deferred 2252 2253 case VAL_PERSISTABLEBUNDLE: 2254 return readPersistableBundle(loader); 2255 2256 case VAL_SIZE: 2257 return readSize(); 2258 2259 case VAL_SIZEF: 2260 return readSizeF(); 2261 2262 default: 2263 int off = dataPosition() - 4; 2264 throw new RuntimeException( 2265 "Parcel " + this + ": Unmarshalling unknown type code " + type + " at offset " + off); 2266 } 2267 } 2268 2269 /** 2270 * Read and return a new Parcelable from the parcel. The given class loader 2271 * will be used to load any enclosed Parcelables. If it is null, the default 2272 * class loader will be used. 2273 * @param loader A ClassLoader from which to instantiate the Parcelable 2274 * object, or null for the default class loader. 2275 * @return Returns the newly created Parcelable, or null if a null 2276 * object has been written. 2277 * @throws BadParcelableException Throws BadParcelableException if there 2278 * was an error trying to instantiate the Parcelable. 2279 */ 2280 public final <T extends Parcelable> T readParcelable(ClassLoader loader) { 2281 Parcelable.Creator<T> creator = readParcelableCreator(loader); 2282 if (creator == null) { 2283 return null; 2284 } 2285 if (creator instanceof Parcelable.ClassLoaderCreator<?>) { 2286 return ((Parcelable.ClassLoaderCreator<T>)creator).createFromParcel(this, loader); 2287 } 2288 return creator.createFromParcel(this); 2289 } 2290 2291 /** @hide */ 2292 public final <T extends Parcelable> T readCreator(Parcelable.Creator<T> creator, 2293 ClassLoader loader) { 2294 if (creator instanceof Parcelable.ClassLoaderCreator<?>) { 2295 return ((Parcelable.ClassLoaderCreator<T>)creator).createFromParcel(this, loader); 2296 } 2297 return creator.createFromParcel(this); 2298 } 2299 2300 /** @hide */ 2301 public final <T extends Parcelable> Parcelable.Creator<T> readParcelableCreator( 2302 ClassLoader loader) { 2303 String name = readString(); 2304 if (name == null) { 2305 return null; 2306 } 2307 Parcelable.Creator<T> creator; 2308 synchronized (mCreators) { 2309 HashMap<String,Parcelable.Creator> map = mCreators.get(loader); 2310 if (map == null) { 2311 map = new HashMap<String,Parcelable.Creator>(); 2312 mCreators.put(loader, map); 2313 } 2314 creator = map.get(name); 2315 if (creator == null) { 2316 try { 2317 Class c = loader == null ? 2318 Class.forName(name) : Class.forName(name, true, loader); 2319 Field f = c.getField("CREATOR"); 2320 creator = (Parcelable.Creator)f.get(null); 2321 } 2322 catch (IllegalAccessException e) { 2323 Log.e(TAG, "Illegal access when unmarshalling: " 2324 + name, e); 2325 throw new BadParcelableException( 2326 "IllegalAccessException when unmarshalling: " + name); 2327 } 2328 catch (ClassNotFoundException e) { 2329 Log.e(TAG, "Class not found when unmarshalling: " 2330 + name, e); 2331 throw new BadParcelableException( 2332 "ClassNotFoundException when unmarshalling: " + name); 2333 } 2334 catch (ClassCastException e) { 2335 throw new BadParcelableException("Parcelable protocol requires a " 2336 + "Parcelable.Creator object called " 2337 + " CREATOR on class " + name); 2338 } 2339 catch (NoSuchFieldException e) { 2340 throw new BadParcelableException("Parcelable protocol requires a " 2341 + "Parcelable.Creator object called " 2342 + " CREATOR on class " + name); 2343 } 2344 catch (NullPointerException e) { 2345 throw new BadParcelableException("Parcelable protocol requires " 2346 + "the CREATOR object to be static on class " + name); 2347 } 2348 if (creator == null) { 2349 throw new BadParcelableException("Parcelable protocol requires a " 2350 + "Parcelable.Creator object called " 2351 + " CREATOR on class " + name); 2352 } 2353 2354 map.put(name, creator); 2355 } 2356 } 2357 2358 return creator; 2359 } 2360 2361 /** 2362 * Read and return a new Parcelable array from the parcel. 2363 * The given class loader will be used to load any enclosed 2364 * Parcelables. 2365 * @return the Parcelable array, or null if the array is null 2366 */ 2367 public final Parcelable[] readParcelableArray(ClassLoader loader) { 2368 int N = readInt(); 2369 if (N < 0) { 2370 return null; 2371 } 2372 Parcelable[] p = new Parcelable[N]; 2373 for (int i = 0; i < N; i++) { 2374 p[i] = (Parcelable) readParcelable(loader); 2375 } 2376 return p; 2377 } 2378 2379 /** 2380 * Read and return a new Serializable object from the parcel. 2381 * @return the Serializable object, or null if the Serializable name 2382 * wasn't found in the parcel. 2383 */ 2384 public final Serializable readSerializable() { 2385 return readSerializable(null); 2386 } 2387 2388 private final Serializable readSerializable(final ClassLoader loader) { 2389 String name = readString(); 2390 if (name == null) { 2391 // For some reason we were unable to read the name of the Serializable (either there 2392 // is nothing left in the Parcel to read, or the next value wasn't a String), so 2393 // return null, which indicates that the name wasn't found in the parcel. 2394 return null; 2395 } 2396 2397 byte[] serializedData = createByteArray(); 2398 ByteArrayInputStream bais = new ByteArrayInputStream(serializedData); 2399 try { 2400 ObjectInputStream ois = new ObjectInputStream(bais) { 2401 @Override 2402 protected Class<?> resolveClass(ObjectStreamClass osClass) 2403 throws IOException, ClassNotFoundException { 2404 // try the custom classloader if provided 2405 if (loader != null) { 2406 Class<?> c = Class.forName(osClass.getName(), false, loader); 2407 if (c != null) { 2408 return c; 2409 } 2410 } 2411 return super.resolveClass(osClass); 2412 } 2413 }; 2414 return (Serializable) ois.readObject(); 2415 } catch (IOException ioe) { 2416 throw new RuntimeException("Parcelable encountered " + 2417 "IOException reading a Serializable object (name = " + name + 2418 ")", ioe); 2419 } catch (ClassNotFoundException cnfe) { 2420 throw new RuntimeException("Parcelable encountered " + 2421 "ClassNotFoundException reading a Serializable object (name = " 2422 + name + ")", cnfe); 2423 } 2424 } 2425 2426 // Cache of previously looked up CREATOR.createFromParcel() methods for 2427 // particular classes. Keys are the names of the classes, values are 2428 // Method objects. 2429 private static final HashMap<ClassLoader,HashMap<String,Parcelable.Creator>> 2430 mCreators = new HashMap<ClassLoader,HashMap<String,Parcelable.Creator>>(); 2431 2432 /** @hide for internal use only. */ 2433 static protected final Parcel obtain(int obj) { 2434 throw new UnsupportedOperationException(); 2435 } 2436 2437 /** @hide */ 2438 static protected final Parcel obtain(long obj) { 2439 final Parcel[] pool = sHolderPool; 2440 synchronized (pool) { 2441 Parcel p; 2442 for (int i=0; i<POOL_SIZE; i++) { 2443 p = pool[i]; 2444 if (p != null) { 2445 pool[i] = null; 2446 if (DEBUG_RECYCLE) { 2447 p.mStack = new RuntimeException(); 2448 } 2449 p.init(obj); 2450 return p; 2451 } 2452 } 2453 } 2454 return new Parcel(obj); 2455 } 2456 2457 private Parcel(long nativePtr) { 2458 if (DEBUG_RECYCLE) { 2459 mStack = new RuntimeException(); 2460 } 2461 //Log.i(TAG, "Initializing obj=0x" + Integer.toHexString(obj), mStack); 2462 init(nativePtr); 2463 } 2464 2465 private void init(long nativePtr) { 2466 if (nativePtr != 0) { 2467 mNativePtr = nativePtr; 2468 mOwnsNativeParcelObject = false; 2469 } else { 2470 mNativePtr = nativeCreate(); 2471 mOwnsNativeParcelObject = true; 2472 } 2473 } 2474 2475 private void freeBuffer() { 2476 if (mOwnsNativeParcelObject) { 2477 nativeFreeBuffer(mNativePtr); 2478 } 2479 } 2480 2481 private void destroy() { 2482 if (mNativePtr != 0) { 2483 if (mOwnsNativeParcelObject) { 2484 nativeDestroy(mNativePtr); 2485 } 2486 mNativePtr = 0; 2487 } 2488 } 2489 2490 @Override 2491 protected void finalize() throws Throwable { 2492 if (DEBUG_RECYCLE) { 2493 if (mStack != null) { 2494 Log.w(TAG, "Client did not call Parcel.recycle()", mStack); 2495 } 2496 } 2497 destroy(); 2498 } 2499 2500 /* package */ void readMapInternal(Map outVal, int N, 2501 ClassLoader loader) { 2502 while (N > 0) { 2503 Object key = readValue(loader); 2504 Object value = readValue(loader); 2505 outVal.put(key, value); 2506 N--; 2507 } 2508 } 2509 2510 /* package */ void readArrayMapInternal(ArrayMap outVal, int N, 2511 ClassLoader loader) { 2512 if (DEBUG_ARRAY_MAP) { 2513 RuntimeException here = new RuntimeException("here"); 2514 here.fillInStackTrace(); 2515 Log.d(TAG, "Reading " + N + " ArrayMap entries", here); 2516 } 2517 int startPos; 2518 while (N > 0) { 2519 if (DEBUG_ARRAY_MAP) startPos = dataPosition(); 2520 String key = readString(); 2521 Object value = readValue(loader); 2522 if (DEBUG_ARRAY_MAP) Log.d(TAG, " Read #" + (N-1) + " " 2523 + (dataPosition()-startPos) + " bytes: key=0x" 2524 + Integer.toHexString((key != null ? key.hashCode() : 0)) + " " + key); 2525 outVal.append(key, value); 2526 N--; 2527 } 2528 outVal.validate(); 2529 } 2530 2531 /* package */ void readArrayMapSafelyInternal(ArrayMap outVal, int N, 2532 ClassLoader loader) { 2533 if (DEBUG_ARRAY_MAP) { 2534 RuntimeException here = new RuntimeException("here"); 2535 here.fillInStackTrace(); 2536 Log.d(TAG, "Reading safely " + N + " ArrayMap entries", here); 2537 } 2538 while (N > 0) { 2539 String key = readString(); 2540 if (DEBUG_ARRAY_MAP) Log.d(TAG, " Read safe #" + (N-1) + ": key=0x" 2541 + (key != null ? key.hashCode() : 0) + " " + key); 2542 Object value = readValue(loader); 2543 outVal.put(key, value); 2544 N--; 2545 } 2546 } 2547 2548 /** 2549 * @hide For testing only. 2550 */ 2551 public void readArrayMap(ArrayMap outVal, ClassLoader loader) { 2552 final int N = readInt(); 2553 if (N < 0) { 2554 return; 2555 } 2556 readArrayMapInternal(outVal, N, loader); 2557 } 2558 2559 private void readListInternal(List outVal, int N, 2560 ClassLoader loader) { 2561 while (N > 0) { 2562 Object value = readValue(loader); 2563 //Log.d(TAG, "Unmarshalling value=" + value); 2564 outVal.add(value); 2565 N--; 2566 } 2567 } 2568 2569 private void readArrayInternal(Object[] outVal, int N, 2570 ClassLoader loader) { 2571 for (int i = 0; i < N; i++) { 2572 Object value = readValue(loader); 2573 //Log.d(TAG, "Unmarshalling value=" + value); 2574 outVal[i] = value; 2575 } 2576 } 2577 2578 private void readSparseArrayInternal(SparseArray outVal, int N, 2579 ClassLoader loader) { 2580 while (N > 0) { 2581 int key = readInt(); 2582 Object value = readValue(loader); 2583 //Log.i(TAG, "Unmarshalling key=" + key + " value=" + value); 2584 outVal.append(key, value); 2585 N--; 2586 } 2587 } 2588 2589 2590 private void readSparseBooleanArrayInternal(SparseBooleanArray outVal, int N) { 2591 while (N > 0) { 2592 int key = readInt(); 2593 boolean value = this.readByte() == 1; 2594 //Log.i(TAG, "Unmarshalling key=" + key + " value=" + value); 2595 outVal.append(key, value); 2596 N--; 2597 } 2598 } 2599 2600 /** 2601 * @hide For testing 2602 */ 2603 public long getBlobAshmemSize() { 2604 return nativeGetBlobAshmemSize(mNativePtr); 2605 } 2606} 2607