19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2006 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage android.util; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport com.android.internal.util.ArrayUtils; 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * SparseBooleanArrays map integers to booleans. 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unlike a normal array of booleans 24b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * there can be gaps in the indices. It is intended to be more memory efficient 25b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * than using a HashMap to map Integers to Booleans, both because it avoids 26b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * auto-boxing keys and values and its data structure doesn't rely on an extra entry object 27b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * for each mapping. 28b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * 29b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * <p>Note that this container keeps its mappings in an array data structure, 30b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * using a binary search to find keys. The implementation is not intended to be appropriate for 31b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * data structures 32b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * that may contain large numbers of items. It is generally slower than a traditional 33b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * HashMap, since lookups require a binary search and adds and removes require inserting 34b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * and deleting entries in the array. For containers holding up to hundreds of items, 35b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * the performance difference is not significant, less than 50%.</p> 365771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * 375771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * <p>It is possible to iterate over the items in this container using 385771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * {@link #keyAt(int)} and {@link #valueAt(int)}. Iterating over the keys using 395771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * <code>keyAt(int)</code> with ascending values of the index will return the 405771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * keys in ascending order, or the values corresponding to the keys in ascending 415771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * order in the case of <code>valueAt(int)<code>.</p> 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4335bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganovpublic class SparseBooleanArray implements Cloneable { 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Creates a new SparseBooleanArray containing no mappings. 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public SparseBooleanArray() { 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(10); 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Creates a new SparseBooleanArray containing no mappings that will not 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * require any additional memory allocation to store the specified 54f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn * number of mappings. If you supply an initial capacity of 0, the 55f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn * sparse array will be initialized with a light-weight representation 56f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn * not requiring any additional array allocations. 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public SparseBooleanArray(int initialCapacity) { 59f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn if (initialCapacity == 0) { 603e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn mKeys = ContainerHelpers.EMPTY_INTS; 613e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn mValues = ContainerHelpers.EMPTY_BOOLEANS; 62f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn } else { 63f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn initialCapacity = ArrayUtils.idealIntArraySize(initialCapacity); 64f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn mKeys = new int[initialCapacity]; 65f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn mValues = new boolean[initialCapacity]; 66f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn } 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSize = 0; 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7035bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov @Override 7135bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov public SparseBooleanArray clone() { 7235bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov SparseBooleanArray clone = null; 7335bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov try { 7435bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov clone = (SparseBooleanArray) super.clone(); 7535bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov clone.mKeys = mKeys.clone(); 7635bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov clone.mValues = mValues.clone(); 7735bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov } catch (CloneNotSupportedException cnse) { 7835bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov /* ignore */ 7935bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov } 8035bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov return clone; 8135bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov } 8235bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Gets the boolean mapped from the specified key, or <code>false</code> 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * if no such mapping has been made. 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean get(int key) { 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return get(key, false); 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Gets the boolean mapped from the specified key, or the specified value 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * if no such mapping has been made. 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean get(int key, boolean valueIfKeyNotFound) { 963e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn int i = ContainerHelpers.binarySearch(mKeys, mSize, key); 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (i < 0) { 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return valueIfKeyNotFound; 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mValues[i]; 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Removes the mapping from the specified key, if there was any. 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void delete(int key) { 1093e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn int i = ContainerHelpers.binarySearch(mKeys, mSize, key); 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (i >= 0) { 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project System.arraycopy(mKeys, i + 1, mKeys, i, mSize - (i + 1)); 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project System.arraycopy(mValues, i + 1, mValues, i, mSize - (i + 1)); 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSize--; 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Adds a mapping from the specified key to the specified value, 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * replacing the previous mapping from the specified key if there 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * was one. 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void put(int key, boolean value) { 1243e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn int i = ContainerHelpers.binarySearch(mKeys, mSize, key); 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (i >= 0) { 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mValues[i] = value; 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project i = ~i; 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSize >= mKeys.length) { 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int n = ArrayUtils.idealIntArraySize(mSize + 1); 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int[] nkeys = new int[n]; 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean[] nvalues = new boolean[n]; 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Log.e("SparseBooleanArray", "grow " + mKeys.length + " to " + n); 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project System.arraycopy(mKeys, 0, nkeys, 0, mKeys.length); 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project System.arraycopy(mValues, 0, nvalues, 0, mValues.length); 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mKeys = nkeys; 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mValues = nvalues; 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSize - i != 0) { 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Log.e("SparseBooleanArray", "move " + (mSize - i)); 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project System.arraycopy(mKeys, i, mKeys, i + 1, mSize - i); 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project System.arraycopy(mValues, i, mValues, i + 1, mSize - i); 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mKeys[i] = key; 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mValues[i] = value; 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSize++; 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns the number of key-value mappings that this SparseBooleanArray 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * currently stores. 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int size() { 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSize; 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Given an index in the range <code>0...size()-1</code>, returns 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the key from the <code>index</code>th key-value mapping that this 1685771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * SparseBooleanArray stores. 1695771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * 1705771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * <p>The keys corresponding to indices in ascending order are guaranteed to 1715771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * be in ascending order, e.g., <code>keyAt(0)</code> will return the 1725771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * smallest key and <code>keyAt(size()-1)</code> will return the largest 1735771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * key.</p> 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int keyAt(int index) { 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mKeys[index]; 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1785771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Given an index in the range <code>0...size()-1</code>, returns 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the value from the <code>index</code>th key-value mapping that this 1825771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * SparseBooleanArray stores. 1835771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * 1845771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * <p>The values corresponding to indices in ascending order are guaranteed 1855771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * to be associated with keys in ascending order, e.g., 1865771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * <code>valueAt(0)</code> will return the value associated with the 1875771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * smallest key and <code>valueAt(size()-1)</code> will return the value 1885771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * associated with the largest key.</p> 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean valueAt(int index) { 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mValues[index]; 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns the index for which {@link #keyAt} would return the 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * specified key, or a negative number if the specified 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * key is not mapped. 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int indexOfKey(int key) { 2003e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn return ContainerHelpers.binarySearch(mKeys, mSize, key); 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns an index for which {@link #valueAt} would return the 2059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * specified key, or a negative number if no keys map to the 2069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * specified value. 2079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Beware that this is a linear search, unlike lookups by key, 2089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * and that multiple keys can map to the same value and this will 2099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * find only one of them. 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int indexOfValue(boolean value) { 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < mSize; i++) 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mValues[i] == value) 2149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return i; 2159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return -1; 2179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Removes all key-value mappings from this SparseBooleanArray. 2219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void clear() { 2239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSize = 0; 2249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Puts a key/value pair into the array, optimizing for the case where 2289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the key is greater than all existing keys in the array. 2299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void append(int key, boolean value) { 2319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSize != 0 && key <= mKeys[mSize - 1]) { 2329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project put(key, value); 2339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 2349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int pos = mSize; 2379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (pos >= mKeys.length) { 2389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int n = ArrayUtils.idealIntArraySize(pos + 1); 2399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int[] nkeys = new int[n]; 2419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean[] nvalues = new boolean[n]; 2429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Log.e("SparseBooleanArray", "grow " + mKeys.length + " to " + n); 2449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project System.arraycopy(mKeys, 0, nkeys, 0, mKeys.length); 2459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project System.arraycopy(mValues, 0, nvalues, 0, mValues.length); 2469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mKeys = nkeys; 2489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mValues = nvalues; 2499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mKeys[pos] = key; 2529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mValues[pos] = value; 2539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSize = pos + 1; 2549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2553e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn 2563e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn /** 2573e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn * {@inheritDoc} 2583e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn * 2593e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn * <p>This implementation composes a string by iterating over its mappings. 2603e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn */ 2613e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn @Override 2623e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn public String toString() { 2633e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn if (size() <= 0) { 2643e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn return "{}"; 2653e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn } 2663e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn 2673e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn StringBuilder buffer = new StringBuilder(mSize * 28); 2683e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append('{'); 2693e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn for (int i=0; i<mSize; i++) { 2703e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn if (i > 0) { 2713e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append(", "); 2723e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn } 2733e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn int key = keyAt(i); 2743e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append(key); 2753e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append('='); 2763e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn boolean value = valueAt(i); 2773e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append(value); 2783e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn } 2793e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append('}'); 2803e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn return buffer.toString(); 2813e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn } 2823e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn 2839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int[] mKeys; 2849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean[] mValues; 2859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mSize; 2869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 287