android_mtp_MtpDatabase.cpp revision 3977472d9f3380a8323156dbc7d0090cf2f2d310 
1/*
2 * Copyright (C) 2010 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
17#define LOG_TAG "MtpDatabaseJNI"
18#include "utils/Log.h"
19
20#include <stdio.h>
21#include <assert.h>
22#include <limits.h>
23#include <unistd.h>
24#include <fcntl.h>
25
26#include "jni.h"
27#include "JNIHelp.h"
28#include "android_runtime/AndroidRuntime.h"
29
30#include "MtpDatabase.h"
31#include "MtpDataPacket.h"
32#include "MtpProperty.h"
33#include "MtpStringBuffer.h"
34#include "MtpUtils.h"
35#include "mtp.h"
36
37using namespace android;
38
39// ----------------------------------------------------------------------------
40
41static jmethodID method_beginSendObject;
42static jmethodID method_endSendObject;
43static jmethodID method_getObjectList;
44static jmethodID method_getNumObjects;
45static jmethodID method_getSupportedPlaybackFormats;
46static jmethodID method_getSupportedCaptureFormats;
47static jmethodID method_getSupportedObjectProperties;
48static jmethodID method_getSupportedDeviceProperties;
49static jmethodID method_setObjectProperty;
50static jmethodID method_getDeviceProperty;
51static jmethodID method_setDeviceProperty;
52static jmethodID method_getObjectPropertyList;
53static jmethodID method_getObjectInfo;
54static jmethodID method_getObjectFilePath;
55static jmethodID method_deleteFile;
56static jmethodID method_getObjectReferences;
57static jmethodID method_setObjectReferences;
58static jmethodID method_sessionStarted;
59static jmethodID method_sessionEnded;
60
61static jfieldID field_context;
62
63// MtpPropertyList fields
64static jfieldID field_mCount;
65static jfieldID field_mResult;
66static jfieldID field_mObjectHandles;
67static jfieldID field_mPropertyCodes;
68static jfieldID field_mDataTypes;
69static jfieldID field_mLongValues;
70static jfieldID field_mStringValues;
71
72
73MtpDatabase* getMtpDatabase(JNIEnv *env, jobject database) {
74    return (MtpDatabase *)env->GetIntField(database, field_context);
75}
76
77#ifdef HAVE_ANDROID_OS
78// ----------------------------------------------------------------------------
79
80class MyMtpDatabase : public MtpDatabase {
81private:
82    jobject         mDatabase;
83    jintArray       mIntBuffer;
84    jlongArray      mLongBuffer;
85    jcharArray      mStringBuffer;
86
87public:
88                                    MyMtpDatabase(JNIEnv *env, jobject client);
89    virtual                         ~MyMtpDatabase();
90    void                            cleanup(JNIEnv *env);
91
92    virtual MtpObjectHandle         beginSendObject(const char* path,
93                                            MtpObjectFormat format,
94                                            MtpObjectHandle parent,
95                                            MtpStorageID storage,
96                                            uint64_t size,
97                                            time_t modified);
98
99    virtual void                    endSendObject(const char* path,
100                                            MtpObjectHandle handle,
101                                            MtpObjectFormat format,
102                                            bool succeeded);
103
104    virtual MtpObjectHandleList*    getObjectList(MtpStorageID storageID,
105                                    MtpObjectFormat format,
106                                    MtpObjectHandle parent);
107
108    virtual int                     getNumObjects(MtpStorageID storageID,
109                                            MtpObjectFormat format,
110                                            MtpObjectHandle parent);
111
112    // callee should delete[] the results from these
113    // results can be NULL
114    virtual MtpObjectFormatList*    getSupportedPlaybackFormats();
115    virtual MtpObjectFormatList*    getSupportedCaptureFormats();
116    virtual MtpObjectPropertyList*  getSupportedObjectProperties(MtpObjectFormat format);
117    virtual MtpDevicePropertyList*  getSupportedDeviceProperties();
118
119    virtual MtpResponseCode         getObjectPropertyValue(MtpObjectHandle handle,
120                                            MtpObjectProperty property,
121                                            MtpDataPacket& packet);
122
123    virtual MtpResponseCode         setObjectPropertyValue(MtpObjectHandle handle,
124                                            MtpObjectProperty property,
125                                            MtpDataPacket& packet);
126
127    virtual MtpResponseCode         getDevicePropertyValue(MtpDeviceProperty property,
128                                            MtpDataPacket& packet);
129
130    virtual MtpResponseCode         setDevicePropertyValue(MtpDeviceProperty property,
131                                            MtpDataPacket& packet);
132
133    virtual MtpResponseCode         resetDeviceProperty(MtpDeviceProperty property);
134
135    virtual MtpResponseCode         getObjectPropertyList(MtpObjectHandle handle,
136                                            uint32_t format, uint32_t property,
137                                            int groupCode, int depth,
138                                            MtpDataPacket& packet);
139
140    virtual MtpResponseCode         getObjectInfo(MtpObjectHandle handle,
141                                            MtpDataPacket& packet);
142
143    virtual MtpResponseCode         getObjectFilePath(MtpObjectHandle handle,
144                                            MtpString& outFilePath,
145                                            int64_t& outFileLength,
146                                            MtpObjectFormat& outFormat);
147    virtual MtpResponseCode         deleteFile(MtpObjectHandle handle);
148
149    bool                            getObjectPropertyInfo(MtpObjectProperty property, int& type);
150    bool                            getDevicePropertyInfo(MtpDeviceProperty property, int& type);
151
152    virtual MtpObjectHandleList*    getObjectReferences(MtpObjectHandle handle);
153
154    virtual MtpResponseCode         setObjectReferences(MtpObjectHandle handle,
155                                            MtpObjectHandleList* references);
156
157    virtual MtpProperty*            getObjectPropertyDesc(MtpObjectProperty property,
158                                            MtpObjectFormat format);
159
160    virtual MtpProperty*            getDevicePropertyDesc(MtpDeviceProperty property);
161
162    virtual void                    sessionStarted();
163
164    virtual void                    sessionEnded();
165};
166
167// ----------------------------------------------------------------------------
168
169static void checkAndClearExceptionFromCallback(JNIEnv* env, const char* methodName) {
170    if (env->ExceptionCheck()) {
171        LOGE("An exception was thrown by callback '%s'.", methodName);
172        LOGE_EX(env);
173        env->ExceptionClear();
174    }
175}
176
177// ----------------------------------------------------------------------------
178
179MyMtpDatabase::MyMtpDatabase(JNIEnv *env, jobject client)
180    :   mDatabase(env->NewGlobalRef(client)),
181        mIntBuffer(NULL),
182        mLongBuffer(NULL),
183        mStringBuffer(NULL)
184{
185    jintArray intArray;
186    jlongArray longArray;
187    jcharArray charArray;
188
189    // create buffers for out arguments
190    // we don't need to be thread-safe so this is OK
191    intArray = env->NewIntArray(3);
192    if (!intArray)
193        goto out_of_memory;
194    mIntBuffer = (jintArray)env->NewGlobalRef(intArray);
195    longArray = env->NewLongArray(2);
196    if (!longArray)
197        goto out_of_memory;
198    mLongBuffer = (jlongArray)env->NewGlobalRef(longArray);
199    charArray = env->NewCharArray(256);
200    if (!charArray)
201        goto out_of_memory;
202    mStringBuffer = (jcharArray)env->NewGlobalRef(charArray);
203    return;
204
205out_of_memory:
206    env->ThrowNew(env->FindClass("java/lang/OutOfMemoryError"), NULL);
207}
208
209void MyMtpDatabase::cleanup(JNIEnv *env) {
210    env->DeleteGlobalRef(mDatabase);
211    env->DeleteGlobalRef(mIntBuffer);
212    env->DeleteGlobalRef(mLongBuffer);
213    env->DeleteGlobalRef(mStringBuffer);
214}
215
216MyMtpDatabase::~MyMtpDatabase() {
217}
218
219MtpObjectHandle MyMtpDatabase::beginSendObject(const char* path,
220                                            MtpObjectFormat format,
221                                            MtpObjectHandle parent,
222                                            MtpStorageID storage,
223                                            uint64_t size,
224                                            time_t modified) {
225    JNIEnv* env = AndroidRuntime::getJNIEnv();
226    jstring pathStr = env->NewStringUTF(path);
227    MtpObjectHandle result = env->CallIntMethod(mDatabase, method_beginSendObject,
228            pathStr, (jint)format, (jint)parent, (jint)storage,
229            (jlong)size, (jlong)modified);
230
231    if (pathStr)
232        env->DeleteLocalRef(pathStr);
233    checkAndClearExceptionFromCallback(env, __FUNCTION__);
234    return result;
235}
236
237void MyMtpDatabase::endSendObject(const char* path, MtpObjectHandle handle,
238                                MtpObjectFormat format, bool succeeded) {
239    JNIEnv* env = AndroidRuntime::getJNIEnv();
240    jstring pathStr = env->NewStringUTF(path);
241    env->CallVoidMethod(mDatabase, method_endSendObject, pathStr,
242                        (jint)handle, (jint)format, (jboolean)succeeded);
243
244    if (pathStr)
245        env->DeleteLocalRef(pathStr);
246    checkAndClearExceptionFromCallback(env, __FUNCTION__);
247}
248
249MtpObjectHandleList* MyMtpDatabase::getObjectList(MtpStorageID storageID,
250                                    MtpObjectFormat format,
251                                    MtpObjectHandle parent) {
252    JNIEnv* env = AndroidRuntime::getJNIEnv();
253    jintArray array = (jintArray)env->CallObjectMethod(mDatabase, method_getObjectList,
254                (jint)storageID, (jint)format, (jint)parent);
255    if (!array)
256        return NULL;
257    MtpObjectHandleList* list = new MtpObjectHandleList();
258    jint* handles = env->GetIntArrayElements(array, 0);
259    jsize length = env->GetArrayLength(array);
260    for (int i = 0; i < length; i++)
261        list->push(handles[i]);
262    env->ReleaseIntArrayElements(array, handles, 0);
263    env->DeleteLocalRef(array);
264
265    checkAndClearExceptionFromCallback(env, __FUNCTION__);
266    return list;
267}
268
269int MyMtpDatabase::getNumObjects(MtpStorageID storageID,
270                                MtpObjectFormat format,
271                                MtpObjectHandle parent) {
272    JNIEnv* env = AndroidRuntime::getJNIEnv();
273    int result = env->CallIntMethod(mDatabase, method_getNumObjects,
274                (jint)storageID, (jint)format, (jint)parent);
275
276    checkAndClearExceptionFromCallback(env, __FUNCTION__);
277    return result;
278}
279
280MtpObjectFormatList* MyMtpDatabase::getSupportedPlaybackFormats() {
281    JNIEnv* env = AndroidRuntime::getJNIEnv();
282    jintArray array = (jintArray)env->CallObjectMethod(mDatabase,
283            method_getSupportedPlaybackFormats);
284    if (!array)
285        return NULL;
286    MtpObjectFormatList* list = new MtpObjectFormatList();
287    jint* formats = env->GetIntArrayElements(array, 0);
288    jsize length = env->GetArrayLength(array);
289    for (int i = 0; i < length; i++)
290        list->push(formats[i]);
291    env->ReleaseIntArrayElements(array, formats, 0);
292    env->DeleteLocalRef(array);
293
294    checkAndClearExceptionFromCallback(env, __FUNCTION__);
295    return list;
296}
297
298MtpObjectFormatList* MyMtpDatabase::getSupportedCaptureFormats() {
299    JNIEnv* env = AndroidRuntime::getJNIEnv();
300    jintArray array = (jintArray)env->CallObjectMethod(mDatabase,
301            method_getSupportedCaptureFormats);
302    if (!array)
303        return NULL;
304    MtpObjectFormatList* list = new MtpObjectFormatList();
305    jint* formats = env->GetIntArrayElements(array, 0);
306    jsize length = env->GetArrayLength(array);
307    for (int i = 0; i < length; i++)
308        list->push(formats[i]);
309    env->ReleaseIntArrayElements(array, formats, 0);
310    env->DeleteLocalRef(array);
311
312    checkAndClearExceptionFromCallback(env, __FUNCTION__);
313    return list;
314}
315
316MtpObjectPropertyList* MyMtpDatabase::getSupportedObjectProperties(MtpObjectFormat format) {
317    JNIEnv* env = AndroidRuntime::getJNIEnv();
318    jintArray array = (jintArray)env->CallObjectMethod(mDatabase,
319            method_getSupportedObjectProperties, (jint)format);
320    if (!array)
321        return NULL;
322    MtpObjectPropertyList* list = new MtpObjectPropertyList();
323    jint* properties = env->GetIntArrayElements(array, 0);
324    jsize length = env->GetArrayLength(array);
325    for (int i = 0; i < length; i++)
326        list->push(properties[i]);
327    env->ReleaseIntArrayElements(array, properties, 0);
328    env->DeleteLocalRef(array);
329
330    checkAndClearExceptionFromCallback(env, __FUNCTION__);
331    return list;
332}
333
334MtpDevicePropertyList* MyMtpDatabase::getSupportedDeviceProperties() {
335    JNIEnv* env = AndroidRuntime::getJNIEnv();
336    jintArray array = (jintArray)env->CallObjectMethod(mDatabase,
337            method_getSupportedDeviceProperties);
338    if (!array)
339        return NULL;
340    MtpDevicePropertyList* list = new MtpDevicePropertyList();
341    jint* properties = env->GetIntArrayElements(array, 0);
342    jsize length = env->GetArrayLength(array);
343    for (int i = 0; i < length; i++)
344        list->push(properties[i]);
345    env->ReleaseIntArrayElements(array, properties, 0);
346    env->DeleteLocalRef(array);
347
348    checkAndClearExceptionFromCallback(env, __FUNCTION__);
349    return list;
350}
351
352MtpResponseCode MyMtpDatabase::getObjectPropertyValue(MtpObjectHandle handle,
353                                            MtpObjectProperty property,
354                                            MtpDataPacket& packet) {
355    JNIEnv* env = AndroidRuntime::getJNIEnv();
356    jobject list = env->CallObjectMethod(mDatabase, method_getObjectPropertyList,
357                (jlong)handle, 0, (jlong)property, 0, 0);
358    MtpResponseCode result = env->GetIntField(list, field_mResult);
359    int count = env->GetIntField(list, field_mCount);
360    if (result == MTP_RESPONSE_OK && count != 1)
361        result = MTP_RESPONSE_GENERAL_ERROR;
362
363    if (result == MTP_RESPONSE_OK) {
364        jintArray objectHandlesArray = (jintArray)env->GetObjectField(list, field_mObjectHandles);
365        jintArray propertyCodesArray = (jintArray)env->GetObjectField(list, field_mPropertyCodes);
366        jintArray dataTypesArray = (jintArray)env->GetObjectField(list, field_mDataTypes);
367        jlongArray longValuesArray = (jlongArray)env->GetObjectField(list, field_mLongValues);
368        jobjectArray stringValuesArray = (jobjectArray)env->GetObjectField(list, field_mStringValues);
369
370        jint* objectHandles = env->GetIntArrayElements(objectHandlesArray, 0);
371        jint* propertyCodes = env->GetIntArrayElements(propertyCodesArray, 0);
372        jint* dataTypes = env->GetIntArrayElements(dataTypesArray, 0);
373        jlong* longValues = (longValuesArray ? env->GetLongArrayElements(longValuesArray, 0) : NULL);
374
375        int type = dataTypes[0];
376        jlong longValue = (longValues ? longValues[0] : 0);
377
378        // special case date properties, which are strings to MTP
379        // but stored internally as a uint64
380        if (property == MTP_PROPERTY_DATE_MODIFIED || property == MTP_PROPERTY_DATE_ADDED) {
381            char    date[20];
382            formatDateTime(longValue, date, sizeof(date));
383            packet.putString(date);
384            goto out;
385        }
386        // release date is stored internally as just the year
387        if (property == MTP_PROPERTY_ORIGINAL_RELEASE_DATE) {
388            char    date[20];
389            snprintf(date, sizeof(date), "%04lld0101T000000", longValue);
390            packet.putString(date);
391            goto out;
392        }
393
394        switch (type) {
395            case MTP_TYPE_INT8:
396                packet.putInt8(longValue);
397                break;
398            case MTP_TYPE_UINT8:
399                packet.putUInt8(longValue);
400                break;
401            case MTP_TYPE_INT16:
402                packet.putInt16(longValue);
403                break;
404            case MTP_TYPE_UINT16:
405                packet.putUInt16(longValue);
406                break;
407            case MTP_TYPE_INT32:
408                packet.putInt32(longValue);
409                break;
410            case MTP_TYPE_UINT32:
411                packet.putUInt32(longValue);
412                break;
413            case MTP_TYPE_INT64:
414                packet.putInt64(longValue);
415                break;
416            case MTP_TYPE_UINT64:
417                packet.putUInt64(longValue);
418                break;
419            case MTP_TYPE_INT128:
420                packet.putInt128(longValue);
421                break;
422            case MTP_TYPE_UINT128:
423                packet.putInt128(longValue);
424                break;
425            case MTP_TYPE_STR:
426            {
427                jstring stringValue = (jstring)env->GetObjectArrayElement(stringValuesArray, 0);
428                if (stringValue) {
429                    const char* str = env->GetStringUTFChars(stringValue, NULL);
430                    if (str == NULL) {
431                        return MTP_RESPONSE_GENERAL_ERROR;
432                    }
433                    packet.putString(str);
434                    env->ReleaseStringUTFChars(stringValue, str);
435                } else {
436                    packet.putEmptyString();
437                }
438                break;
439             }
440            default:
441                LOGE("unsupported type in getObjectPropertyValue\n");
442                result = MTP_RESPONSE_INVALID_OBJECT_PROP_FORMAT;
443        }
444out:
445        env->ReleaseIntArrayElements(objectHandlesArray, objectHandles, 0);
446        env->ReleaseIntArrayElements(propertyCodesArray, propertyCodes, 0);
447        env->ReleaseIntArrayElements(dataTypesArray, dataTypes, 0);
448        if (longValues)
449            env->ReleaseLongArrayElements(longValuesArray, longValues, 0);
450
451        env->DeleteLocalRef(objectHandlesArray);
452        env->DeleteLocalRef(propertyCodesArray);
453        env->DeleteLocalRef(dataTypesArray);
454        if (longValuesArray)
455            env->DeleteLocalRef(longValuesArray);
456        if (stringValuesArray)
457            env->DeleteLocalRef(stringValuesArray);
458    }
459
460    env->DeleteLocalRef(list);
461    checkAndClearExceptionFromCallback(env, __FUNCTION__);
462    return result;
463}
464
465MtpResponseCode MyMtpDatabase::setObjectPropertyValue(MtpObjectHandle handle,
466                                            MtpObjectProperty property,
467                                            MtpDataPacket& packet) {
468    int         type;
469
470    if (!getObjectPropertyInfo(property, type))
471        return MTP_RESPONSE_OBJECT_PROP_NOT_SUPPORTED;
472
473    JNIEnv* env = AndroidRuntime::getJNIEnv();
474    jlong longValue = 0;
475    jstring stringValue = NULL;
476
477    switch (type) {
478        case MTP_TYPE_INT8:
479            longValue = packet.getInt8();
480            break;
481        case MTP_TYPE_UINT8:
482            longValue = packet.getUInt8();
483            break;
484        case MTP_TYPE_INT16:
485            longValue = packet.getInt16();
486            break;
487        case MTP_TYPE_UINT16:
488            longValue = packet.getUInt16();
489            break;
490        case MTP_TYPE_INT32:
491            longValue = packet.getInt32();
492            break;
493        case MTP_TYPE_UINT32:
494            longValue = packet.getUInt32();
495            break;
496        case MTP_TYPE_INT64:
497            longValue = packet.getInt64();
498            break;
499        case MTP_TYPE_UINT64:
500            longValue = packet.getUInt64();
501            break;
502        case MTP_TYPE_STR:
503        {
504            MtpStringBuffer buffer;
505            packet.getString(buffer);
506            stringValue = env->NewStringUTF((const char *)buffer);
507            break;
508         }
509        default:
510            LOGE("unsupported type in getObjectPropertyValue\n");
511            return MTP_RESPONSE_INVALID_OBJECT_PROP_FORMAT;
512    }
513
514    jint result = env->CallIntMethod(mDatabase, method_setObjectProperty,
515                (jint)handle, (jint)property, longValue, stringValue);
516    if (stringValue)
517        env->DeleteLocalRef(stringValue);
518
519    checkAndClearExceptionFromCallback(env, __FUNCTION__);
520    return result;
521}
522
523MtpResponseCode MyMtpDatabase::getDevicePropertyValue(MtpDeviceProperty property,
524                                            MtpDataPacket& packet) {
525    int         type;
526
527    if (!getDevicePropertyInfo(property, type))
528        return MTP_RESPONSE_DEVICE_PROP_NOT_SUPPORTED;
529
530    JNIEnv* env = AndroidRuntime::getJNIEnv();
531    jint result = env->CallIntMethod(mDatabase, method_getDeviceProperty,
532                (jint)property, mLongBuffer, mStringBuffer);
533    if (result != MTP_RESPONSE_OK) {
534        checkAndClearExceptionFromCallback(env, __FUNCTION__);
535        return result;
536    }
537
538    jlong* longValues = env->GetLongArrayElements(mLongBuffer, 0);
539    jlong longValue = longValues[0];
540    env->ReleaseLongArrayElements(mLongBuffer, longValues, 0);
541
542    switch (type) {
543        case MTP_TYPE_INT8:
544            packet.putInt8(longValue);
545            break;
546        case MTP_TYPE_UINT8:
547            packet.putUInt8(longValue);
548            break;
549        case MTP_TYPE_INT16:
550            packet.putInt16(longValue);
551            break;
552        case MTP_TYPE_UINT16:
553            packet.putUInt16(longValue);
554            break;
555        case MTP_TYPE_INT32:
556            packet.putInt32(longValue);
557            break;
558        case MTP_TYPE_UINT32:
559            packet.putUInt32(longValue);
560            break;
561        case MTP_TYPE_INT64:
562            packet.putInt64(longValue);
563            break;
564        case MTP_TYPE_UINT64:
565            packet.putUInt64(longValue);
566            break;
567        case MTP_TYPE_INT128:
568            packet.putInt128(longValue);
569            break;
570        case MTP_TYPE_UINT128:
571            packet.putInt128(longValue);
572            break;
573        case MTP_TYPE_STR:
574        {
575            jchar* str = env->GetCharArrayElements(mStringBuffer, 0);
576            packet.putString(str);
577            env->ReleaseCharArrayElements(mStringBuffer, str, 0);
578            break;
579         }
580        default:
581            LOGE("unsupported type in getDevicePropertyValue\n");
582            return MTP_RESPONSE_INVALID_DEVICE_PROP_FORMAT;
583    }
584
585    checkAndClearExceptionFromCallback(env, __FUNCTION__);
586    return MTP_RESPONSE_OK;
587}
588
589MtpResponseCode MyMtpDatabase::setDevicePropertyValue(MtpDeviceProperty property,
590                                            MtpDataPacket& packet) {
591    int         type;
592
593    if (!getDevicePropertyInfo(property, type))
594        return MTP_RESPONSE_DEVICE_PROP_NOT_SUPPORTED;
595
596    JNIEnv* env = AndroidRuntime::getJNIEnv();
597    jlong longValue = 0;
598    jstring stringValue = NULL;
599
600    switch (type) {
601        case MTP_TYPE_INT8:
602            longValue = packet.getInt8();
603            break;
604        case MTP_TYPE_UINT8:
605            longValue = packet.getUInt8();
606            break;
607        case MTP_TYPE_INT16:
608            longValue = packet.getInt16();
609            break;
610        case MTP_TYPE_UINT16:
611            longValue = packet.getUInt16();
612            break;
613        case MTP_TYPE_INT32:
614            longValue = packet.getInt32();
615            break;
616        case MTP_TYPE_UINT32:
617            longValue = packet.getUInt32();
618            break;
619        case MTP_TYPE_INT64:
620            longValue = packet.getInt64();
621            break;
622        case MTP_TYPE_UINT64:
623            longValue = packet.getUInt64();
624            break;
625        case MTP_TYPE_STR:
626        {
627            MtpStringBuffer buffer;
628            packet.getString(buffer);
629            stringValue = env->NewStringUTF((const char *)buffer);
630            break;
631         }
632        default:
633            LOGE("unsupported type in setDevicePropertyValue\n");
634            return MTP_RESPONSE_INVALID_OBJECT_PROP_FORMAT;
635    }
636
637    jint result = env->CallIntMethod(mDatabase, method_setDeviceProperty,
638                (jint)property, longValue, stringValue);
639    if (stringValue)
640        env->DeleteLocalRef(stringValue);
641
642    checkAndClearExceptionFromCallback(env, __FUNCTION__);
643    return result;
644}
645
646MtpResponseCode MyMtpDatabase::resetDeviceProperty(MtpDeviceProperty property) {
647    return -1;
648}
649
650MtpResponseCode MyMtpDatabase::getObjectPropertyList(MtpObjectHandle handle,
651                                            uint32_t format, uint32_t property,
652                                            int groupCode, int depth,
653                                            MtpDataPacket& packet) {
654    JNIEnv* env = AndroidRuntime::getJNIEnv();
655    jobject list = env->CallObjectMethod(mDatabase, method_getObjectPropertyList,
656                (jlong)handle, (jint)format, (jlong)property, (jint)groupCode, (jint)depth);
657    checkAndClearExceptionFromCallback(env, __FUNCTION__);
658    if (!list)
659        return MTP_RESPONSE_GENERAL_ERROR;
660    int count = env->GetIntField(list, field_mCount);
661    MtpResponseCode result = env->GetIntField(list, field_mResult);
662
663    packet.putUInt32(count);
664    if (count > 0) {
665        jintArray objectHandlesArray = (jintArray)env->GetObjectField(list, field_mObjectHandles);
666        jintArray propertyCodesArray = (jintArray)env->GetObjectField(list, field_mPropertyCodes);
667        jintArray dataTypesArray = (jintArray)env->GetObjectField(list, field_mDataTypes);
668        jlongArray longValuesArray = (jlongArray)env->GetObjectField(list, field_mLongValues);
669        jobjectArray stringValuesArray = (jobjectArray)env->GetObjectField(list, field_mStringValues);
670
671        jint* objectHandles = env->GetIntArrayElements(objectHandlesArray, 0);
672        jint* propertyCodes = env->GetIntArrayElements(propertyCodesArray, 0);
673        jint* dataTypes = env->GetIntArrayElements(dataTypesArray, 0);
674        jlong* longValues = (longValuesArray ? env->GetLongArrayElements(longValuesArray, 0) : NULL);
675
676        for (int i = 0; i < count; i++) {
677            packet.putUInt32(objectHandles[i]);
678            packet.putUInt16(propertyCodes[i]);
679            int type = dataTypes[i];
680            packet.putUInt16(type);
681
682            switch (type) {
683                case MTP_TYPE_INT8:
684                    packet.putInt8(longValues[i]);
685                    break;
686                case MTP_TYPE_UINT8:
687                    packet.putUInt8(longValues[i]);
688                    break;
689                case MTP_TYPE_INT16:
690                    packet.putInt16(longValues[i]);
691                    break;
692                case MTP_TYPE_UINT16:
693                    packet.putUInt16(longValues[i]);
694                    break;
695                case MTP_TYPE_INT32:
696                    packet.putInt32(longValues[i]);
697                    break;
698                case MTP_TYPE_UINT32:
699                    packet.putUInt32(longValues[i]);
700                    break;
701                case MTP_TYPE_INT64:
702                    packet.putInt64(longValues[i]);
703                    break;
704                case MTP_TYPE_UINT64:
705                    packet.putUInt64(longValues[i]);
706                    break;
707                case MTP_TYPE_INT128:
708                    packet.putInt128(longValues[i]);
709                    break;
710                case MTP_TYPE_UINT128:
711                    packet.putUInt128(longValues[i]);
712                    break;
713                case MTP_TYPE_STR: {
714                    jstring value = (jstring)env->GetObjectArrayElement(stringValuesArray, i);
715                    const char *valueStr = (value ? env->GetStringUTFChars(value, NULL) : NULL);
716                    if (valueStr) {
717                        packet.putString(valueStr);
718                        env->ReleaseStringUTFChars(value, valueStr);
719                    } else {
720                        packet.putEmptyString();
721                    }
722                    env->DeleteLocalRef(value);
723                    break;
724                }
725                default:
726                    LOGE("bad or unsupported data type in MyMtpDatabase::getObjectPropertyList");
727                    break;
728            }
729        }
730
731        env->ReleaseIntArrayElements(objectHandlesArray, objectHandles, 0);
732        env->ReleaseIntArrayElements(propertyCodesArray, propertyCodes, 0);
733        env->ReleaseIntArrayElements(dataTypesArray, dataTypes, 0);
734        if (longValues)
735            env->ReleaseLongArrayElements(longValuesArray, longValues, 0);
736
737        env->DeleteLocalRef(objectHandlesArray);
738        env->DeleteLocalRef(propertyCodesArray);
739        env->DeleteLocalRef(dataTypesArray);
740        if (longValuesArray)
741            env->DeleteLocalRef(longValuesArray);
742        if (stringValuesArray)
743            env->DeleteLocalRef(stringValuesArray);
744    }
745
746    env->DeleteLocalRef(list);
747    checkAndClearExceptionFromCallback(env, __FUNCTION__);
748    return result;
749}
750
751MtpResponseCode MyMtpDatabase::getObjectInfo(MtpObjectHandle handle,
752                                            MtpDataPacket& packet) {
753    char    date[20];
754
755    JNIEnv* env = AndroidRuntime::getJNIEnv();
756    jboolean result = env->CallBooleanMethod(mDatabase, method_getObjectInfo,
757                (jint)handle, mIntBuffer, mStringBuffer, mLongBuffer);
758    if (!result)
759        return MTP_RESPONSE_INVALID_OBJECT_HANDLE;
760
761    jint* intValues = env->GetIntArrayElements(mIntBuffer, 0);
762    MtpStorageID storageID = intValues[0];
763    MtpObjectFormat format = intValues[1];
764    MtpObjectHandle parent = intValues[2];
765    env->ReleaseIntArrayElements(mIntBuffer, intValues, 0);
766
767    jlong* longValues = env->GetLongArrayElements(mLongBuffer, 0);
768    uint64_t size = longValues[0];
769    uint64_t modified = longValues[1];
770    env->ReleaseLongArrayElements(mLongBuffer, longValues, 0);
771
772//    int associationType = (format == MTP_FORMAT_ASSOCIATION ?
773//                            MTP_ASSOCIATION_TYPE_GENERIC_FOLDER :
774//                            MTP_ASSOCIATION_TYPE_UNDEFINED);
775    int associationType = MTP_ASSOCIATION_TYPE_UNDEFINED;
776
777    packet.putUInt32(storageID);
778    packet.putUInt16(format);
779    packet.putUInt16(0);   // protection status
780    packet.putUInt32((size > 0xFFFFFFFFLL ? 0xFFFFFFFF : size));
781    packet.putUInt16(0);   // thumb format
782    packet.putUInt32(0);   // thumb compressed size
783    packet.putUInt32(0);   // thumb pix width
784    packet.putUInt32(0);   // thumb pix height
785    packet.putUInt32(0);   // image pix width
786    packet.putUInt32(0);   // image pix height
787    packet.putUInt32(0);   // image bit depth
788    packet.putUInt32(parent);
789    packet.putUInt16(associationType);
790    packet.putUInt32(0);   // association desc
791    packet.putUInt32(0);   // sequence number
792
793    jchar* str = env->GetCharArrayElements(mStringBuffer, 0);
794    packet.putString(str);   // file name
795    env->ReleaseCharArrayElements(mStringBuffer, str, 0);
796
797    packet.putEmptyString();
798    formatDateTime(modified, date, sizeof(date));
799    packet.putString(date);   // date modified
800    packet.putEmptyString();   // keywords
801
802    checkAndClearExceptionFromCallback(env, __FUNCTION__);
803    return MTP_RESPONSE_OK;
804}
805
806MtpResponseCode MyMtpDatabase::getObjectFilePath(MtpObjectHandle handle,
807                                            MtpString& outFilePath,
808                                            int64_t& outFileLength,
809                                            MtpObjectFormat& outFormat) {
810    JNIEnv* env = AndroidRuntime::getJNIEnv();
811    jint result = env->CallIntMethod(mDatabase, method_getObjectFilePath,
812                (jint)handle, mStringBuffer, mLongBuffer);
813    if (result != MTP_RESPONSE_OK) {
814        checkAndClearExceptionFromCallback(env, __FUNCTION__);
815        return result;
816    }
817
818    jchar* str = env->GetCharArrayElements(mStringBuffer, 0);
819    outFilePath.setTo(str, strlen16(str));
820    env->ReleaseCharArrayElements(mStringBuffer, str, 0);
821
822    jlong* longValues = env->GetLongArrayElements(mLongBuffer, 0);
823    outFileLength = longValues[0];
824    outFormat = longValues[1];
825    env->ReleaseLongArrayElements(mLongBuffer, longValues, 0);
826
827    checkAndClearExceptionFromCallback(env, __FUNCTION__);
828    return result;
829}
830
831MtpResponseCode MyMtpDatabase::deleteFile(MtpObjectHandle handle) {
832    JNIEnv* env = AndroidRuntime::getJNIEnv();
833    MtpResponseCode result = env->CallIntMethod(mDatabase, method_deleteFile, (jint)handle);
834
835    checkAndClearExceptionFromCallback(env, __FUNCTION__);
836    return result;
837}
838
839struct PropertyTableEntry {
840    MtpObjectProperty   property;
841    int                 type;
842};
843
844static const PropertyTableEntry   kObjectPropertyTable[] = {
845    {   MTP_PROPERTY_STORAGE_ID,        MTP_TYPE_UINT32     },
846    {   MTP_PROPERTY_OBJECT_FORMAT,     MTP_TYPE_UINT16     },
847    {   MTP_PROPERTY_PROTECTION_STATUS, MTP_TYPE_UINT16     },
848    {   MTP_PROPERTY_OBJECT_SIZE,       MTP_TYPE_UINT64     },
849    {   MTP_PROPERTY_OBJECT_FILE_NAME,  MTP_TYPE_STR        },
850    {   MTP_PROPERTY_DATE_MODIFIED,     MTP_TYPE_STR        },
851    {   MTP_PROPERTY_PARENT_OBJECT,     MTP_TYPE_UINT32     },
852    {   MTP_PROPERTY_PERSISTENT_UID,    MTP_TYPE_UINT128    },
853    {   MTP_PROPERTY_NAME,              MTP_TYPE_STR        },
854    {   MTP_PROPERTY_DISPLAY_NAME,      MTP_TYPE_STR        },
855    {   MTP_PROPERTY_DATE_ADDED,        MTP_TYPE_STR        },
856    {   MTP_PROPERTY_ARTIST,            MTP_TYPE_STR        },
857    {   MTP_PROPERTY_ALBUM_NAME,        MTP_TYPE_STR        },
858    {   MTP_PROPERTY_ALBUM_ARTIST,      MTP_TYPE_STR        },
859    {   MTP_PROPERTY_TRACK,             MTP_TYPE_UINT16     },
860    {   MTP_PROPERTY_ORIGINAL_RELEASE_DATE, MTP_TYPE_STR    },
861    {   MTP_PROPERTY_GENRE,             MTP_TYPE_STR        },
862    {   MTP_PROPERTY_COMPOSER,          MTP_TYPE_STR        },
863    {   MTP_PROPERTY_DURATION,          MTP_TYPE_UINT32     },
864    {   MTP_PROPERTY_DESCRIPTION,       MTP_TYPE_STR        },
865};
866
867static const PropertyTableEntry   kDevicePropertyTable[] = {
868    {   MTP_DEVICE_PROPERTY_SYNCHRONIZATION_PARTNER,    MTP_TYPE_STR },
869    {   MTP_DEVICE_PROPERTY_DEVICE_FRIENDLY_NAME,       MTP_TYPE_STR },
870    {   MTP_DEVICE_PROPERTY_IMAGE_SIZE,                 MTP_TYPE_STR },
871};
872
873bool MyMtpDatabase::getObjectPropertyInfo(MtpObjectProperty property, int& type) {
874    int count = sizeof(kObjectPropertyTable) / sizeof(kObjectPropertyTable[0]);
875    const PropertyTableEntry* entry = kObjectPropertyTable;
876    for (int i = 0; i < count; i++, entry++) {
877        if (entry->property == property) {
878            type = entry->type;
879            return true;
880        }
881    }
882    return false;
883}
884
885bool MyMtpDatabase::getDevicePropertyInfo(MtpDeviceProperty property, int& type) {
886    int count = sizeof(kDevicePropertyTable) / sizeof(kDevicePropertyTable[0]);
887    const PropertyTableEntry* entry = kDevicePropertyTable;
888    for (int i = 0; i < count; i++, entry++) {
889        if (entry->property == property) {
890            type = entry->type;
891            return true;
892        }
893    }
894    return false;
895}
896
897MtpObjectHandleList* MyMtpDatabase::getObjectReferences(MtpObjectHandle handle) {
898    JNIEnv* env = AndroidRuntime::getJNIEnv();
899    jintArray array = (jintArray)env->CallObjectMethod(mDatabase, method_getObjectReferences,
900                (jint)handle);
901    if (!array)
902        return NULL;
903    MtpObjectHandleList* list = new MtpObjectHandleList();
904    jint* handles = env->GetIntArrayElements(array, 0);
905    jsize length = env->GetArrayLength(array);
906    for (int i = 0; i < length; i++)
907        list->push(handles[i]);
908    env->ReleaseIntArrayElements(array, handles, 0);
909    env->DeleteLocalRef(array);
910
911    checkAndClearExceptionFromCallback(env, __FUNCTION__);
912    return list;
913}
914
915MtpResponseCode MyMtpDatabase::setObjectReferences(MtpObjectHandle handle,
916                                                    MtpObjectHandleList* references) {
917    JNIEnv* env = AndroidRuntime::getJNIEnv();
918    int count = references->size();
919    jintArray array = env->NewIntArray(count);
920    if (!array) {
921        LOGE("out of memory in setObjectReferences");
922        return false;
923    }
924    jint* handles = env->GetIntArrayElements(array, 0);
925     for (int i = 0; i < count; i++)
926        handles[i] = (*references)[i];
927    env->ReleaseIntArrayElements(array, handles, 0);
928    MtpResponseCode result = env->CallIntMethod(mDatabase, method_setObjectReferences,
929                (jint)handle, array);
930    env->DeleteLocalRef(array);
931
932    checkAndClearExceptionFromCallback(env, __FUNCTION__);
933    return result;
934}
935
936MtpProperty* MyMtpDatabase::getObjectPropertyDesc(MtpObjectProperty property,
937                                            MtpObjectFormat format) {
938    MtpProperty* result = NULL;
939    switch (property) {
940        case MTP_PROPERTY_OBJECT_FORMAT:
941            // use format as default value
942            result = new MtpProperty(property, MTP_TYPE_UINT16, false, format);
943            break;
944        case MTP_PROPERTY_PROTECTION_STATUS:
945        case MTP_PROPERTY_TRACK:
946            result = new MtpProperty(property, MTP_TYPE_UINT16);
947            break;
948        case MTP_PROPERTY_STORAGE_ID:
949        case MTP_PROPERTY_PARENT_OBJECT:
950        case MTP_PROPERTY_DURATION:
951            result = new MtpProperty(property, MTP_TYPE_UINT32);
952            break;
953        case MTP_PROPERTY_OBJECT_SIZE:
954            result = new MtpProperty(property, MTP_TYPE_UINT64);
955            break;
956        case MTP_PROPERTY_PERSISTENT_UID:
957            result = new MtpProperty(property, MTP_TYPE_UINT128);
958            break;
959        case MTP_PROPERTY_NAME:
960        case MTP_PROPERTY_DISPLAY_NAME:
961        case MTP_PROPERTY_ARTIST:
962        case MTP_PROPERTY_ALBUM_NAME:
963        case MTP_PROPERTY_ALBUM_ARTIST:
964        case MTP_PROPERTY_GENRE:
965        case MTP_PROPERTY_COMPOSER:
966        case MTP_PROPERTY_DESCRIPTION:
967            result = new MtpProperty(property, MTP_TYPE_STR);
968            break;
969        case MTP_PROPERTY_DATE_MODIFIED:
970        case MTP_PROPERTY_DATE_ADDED:
971        case MTP_PROPERTY_ORIGINAL_RELEASE_DATE:
972            result = new MtpProperty(property, MTP_TYPE_STR);
973            result->setFormDateTime();
974            break;
975        case MTP_PROPERTY_OBJECT_FILE_NAME:
976            // We allow renaming files and folders
977            result = new MtpProperty(property, MTP_TYPE_STR, true);
978            break;
979    }
980
981    return result;
982}
983
984MtpProperty* MyMtpDatabase::getDevicePropertyDesc(MtpDeviceProperty property) {
985    JNIEnv* env = AndroidRuntime::getJNIEnv();
986    MtpProperty* result = NULL;
987    bool writable = false;
988
989    switch (property) {
990        case MTP_DEVICE_PROPERTY_SYNCHRONIZATION_PARTNER:
991        case MTP_DEVICE_PROPERTY_DEVICE_FRIENDLY_NAME:
992            writable = true;
993            // fall through
994        case MTP_DEVICE_PROPERTY_IMAGE_SIZE:
995            result = new MtpProperty(property, MTP_TYPE_STR, writable);
996
997            // get current value
998            jint ret = env->CallIntMethod(mDatabase, method_getDeviceProperty,
999                        (jint)property, mLongBuffer, mStringBuffer);
1000            if (ret == MTP_RESPONSE_OK) {
1001                jchar* str = env->GetCharArrayElements(mStringBuffer, 0);
1002                result->setCurrentValue(str);
1003                // for read-only properties it is safe to assume current value is default value
1004                if (!writable)
1005                    result->setDefaultValue(str);
1006                env->ReleaseCharArrayElements(mStringBuffer, str, 0);
1007            } else {
1008                LOGE("unable to read device property, response: %04X", ret);
1009            }
1010            break;
1011    }
1012
1013    checkAndClearExceptionFromCallback(env, __FUNCTION__);
1014    return result;
1015}
1016
1017void MyMtpDatabase::sessionStarted() {
1018    JNIEnv* env = AndroidRuntime::getJNIEnv();
1019    env->CallVoidMethod(mDatabase, method_sessionStarted);
1020    checkAndClearExceptionFromCallback(env, __FUNCTION__);
1021}
1022
1023void MyMtpDatabase::sessionEnded() {
1024    JNIEnv* env = AndroidRuntime::getJNIEnv();
1025    env->CallVoidMethod(mDatabase, method_sessionEnded);
1026    checkAndClearExceptionFromCallback(env, __FUNCTION__);
1027}
1028
1029#endif // HAVE_ANDROID_OS
1030
1031// ----------------------------------------------------------------------------
1032
1033static void
1034android_mtp_MtpDatabase_setup(JNIEnv *env, jobject thiz)
1035{
1036#ifdef HAVE_ANDROID_OS
1037    MyMtpDatabase* database = new MyMtpDatabase(env, thiz);
1038    env->SetIntField(thiz, field_context, (int)database);
1039    checkAndClearExceptionFromCallback(env, __FUNCTION__);
1040#endif
1041}
1042
1043static void
1044android_mtp_MtpDatabase_finalize(JNIEnv *env, jobject thiz)
1045{
1046#ifdef HAVE_ANDROID_OS
1047    MyMtpDatabase* database = (MyMtpDatabase *)env->GetIntField(thiz, field_context);
1048    database->cleanup(env);
1049    delete database;
1050    env->SetIntField(thiz, field_context, 0);
1051    checkAndClearExceptionFromCallback(env, __FUNCTION__);
1052#endif
1053}
1054
1055static jstring
1056android_mtp_MtpPropertyGroup_format_date_time(JNIEnv *env, jobject thiz, jlong seconds)
1057{
1058#ifdef HAVE_ANDROID_OS
1059    char    date[20];
1060    formatDateTime(seconds, date, sizeof(date));
1061    return env->NewStringUTF(date);
1062#else
1063    return NULL;
1064#endif
1065}
1066
1067// ----------------------------------------------------------------------------
1068
1069static JNINativeMethod gMtpDatabaseMethods[] = {
1070    {"native_setup",            "()V",  (void *)android_mtp_MtpDatabase_setup},
1071    {"native_finalize",         "()V",  (void *)android_mtp_MtpDatabase_finalize},
1072};
1073
1074static JNINativeMethod gMtpPropertyGroupMethods[] = {
1075    {"format_date_time",        "(J)Ljava/lang/String;",
1076                                        (void *)android_mtp_MtpPropertyGroup_format_date_time},
1077};
1078
1079static const char* const kClassPathName = "android/mtp/MtpDatabase";
1080
1081int register_android_mtp_MtpDatabase(JNIEnv *env)
1082{
1083    jclass clazz;
1084
1085    clazz = env->FindClass("android/mtp/MtpDatabase");
1086    if (clazz == NULL) {
1087        LOGE("Can't find android/mtp/MtpDatabase");
1088        return -1;
1089    }
1090    method_beginSendObject = env->GetMethodID(clazz, "beginSendObject", "(Ljava/lang/String;IIIJJ)I");
1091    if (method_beginSendObject == NULL) {
1092        LOGE("Can't find beginSendObject");
1093        return -1;
1094    }
1095    method_endSendObject = env->GetMethodID(clazz, "endSendObject", "(Ljava/lang/String;IIZ)V");
1096    if (method_endSendObject == NULL) {
1097        LOGE("Can't find endSendObject");
1098        return -1;
1099    }
1100    method_getObjectList = env->GetMethodID(clazz, "getObjectList", "(III)[I");
1101    if (method_getObjectList == NULL) {
1102        LOGE("Can't find getObjectList");
1103        return -1;
1104    }
1105    method_getNumObjects = env->GetMethodID(clazz, "getNumObjects", "(III)I");
1106    if (method_getNumObjects == NULL) {
1107        LOGE("Can't find getNumObjects");
1108        return -1;
1109    }
1110    method_getSupportedPlaybackFormats = env->GetMethodID(clazz, "getSupportedPlaybackFormats", "()[I");
1111    if (method_getSupportedPlaybackFormats == NULL) {
1112        LOGE("Can't find getSupportedPlaybackFormats");
1113        return -1;
1114    }
1115    method_getSupportedCaptureFormats = env->GetMethodID(clazz, "getSupportedCaptureFormats", "()[I");
1116    if (method_getSupportedCaptureFormats == NULL) {
1117        LOGE("Can't find getSupportedCaptureFormats");
1118        return -1;
1119    }
1120    method_getSupportedObjectProperties = env->GetMethodID(clazz, "getSupportedObjectProperties", "(I)[I");
1121    if (method_getSupportedObjectProperties == NULL) {
1122        LOGE("Can't find getSupportedObjectProperties");
1123        return -1;
1124    }
1125    method_getSupportedDeviceProperties = env->GetMethodID(clazz, "getSupportedDeviceProperties", "()[I");
1126    if (method_getSupportedDeviceProperties == NULL) {
1127        LOGE("Can't find getSupportedDeviceProperties");
1128        return -1;
1129    }
1130    method_setObjectProperty = env->GetMethodID(clazz, "setObjectProperty", "(IIJLjava/lang/String;)I");
1131    if (method_setObjectProperty == NULL) {
1132        LOGE("Can't find setObjectProperty");
1133        return -1;
1134    }
1135    method_getDeviceProperty = env->GetMethodID(clazz, "getDeviceProperty", "(I[J[C)I");
1136    if (method_getDeviceProperty == NULL) {
1137        LOGE("Can't find getDeviceProperty");
1138        return -1;
1139    }
1140    method_setDeviceProperty = env->GetMethodID(clazz, "setDeviceProperty", "(IJLjava/lang/String;)I");
1141    if (method_setDeviceProperty == NULL) {
1142        LOGE("Can't find setDeviceProperty");
1143        return -1;
1144    }
1145    method_getObjectPropertyList = env->GetMethodID(clazz, "getObjectPropertyList",
1146            "(JIJII)Landroid/mtp/MtpPropertyList;");
1147    if (method_getObjectPropertyList == NULL) {
1148        LOGE("Can't find getObjectPropertyList");
1149        return -1;
1150    }
1151    method_getObjectInfo = env->GetMethodID(clazz, "getObjectInfo", "(I[I[C[J)Z");
1152    if (method_getObjectInfo == NULL) {
1153        LOGE("Can't find getObjectInfo");
1154        return -1;
1155    }
1156    method_getObjectFilePath = env->GetMethodID(clazz, "getObjectFilePath", "(I[C[J)I");
1157    if (method_getObjectFilePath == NULL) {
1158        LOGE("Can't find getObjectFilePath");
1159        return -1;
1160    }
1161    method_deleteFile = env->GetMethodID(clazz, "deleteFile", "(I)I");
1162    if (method_deleteFile == NULL) {
1163        LOGE("Can't find deleteFile");
1164        return -1;
1165    }
1166    method_getObjectReferences = env->GetMethodID(clazz, "getObjectReferences", "(I)[I");
1167    if (method_getObjectReferences == NULL) {
1168        LOGE("Can't find getObjectReferences");
1169        return -1;
1170    }
1171    method_setObjectReferences = env->GetMethodID(clazz, "setObjectReferences", "(I[I)I");
1172    if (method_setObjectReferences == NULL) {
1173        LOGE("Can't find setObjectReferences");
1174        return -1;
1175    }
1176    method_sessionStarted = env->GetMethodID(clazz, "sessionStarted", "()V");
1177    if (method_sessionStarted == NULL) {
1178        LOGE("Can't find sessionStarted");
1179        return -1;
1180    }
1181    method_sessionEnded = env->GetMethodID(clazz, "sessionEnded", "()V");
1182    if (method_sessionEnded == NULL) {
1183        LOGE("Can't find sessionEnded");
1184        return -1;
1185    }
1186
1187    field_context = env->GetFieldID(clazz, "mNativeContext", "I");
1188    if (field_context == NULL) {
1189        LOGE("Can't find MtpDatabase.mNativeContext");
1190        return -1;
1191    }
1192
1193    // now set up fields for MtpPropertyList class
1194    clazz = env->FindClass("android/mtp/MtpPropertyList");
1195    if (clazz == NULL) {
1196        LOGE("Can't find android/mtp/MtpPropertyList");
1197        return -1;
1198    }
1199    field_mCount = env->GetFieldID(clazz, "mCount", "I");
1200    if (field_mCount == NULL) {
1201        LOGE("Can't find MtpPropertyList.mCount");
1202        return -1;
1203    }
1204    field_mResult = env->GetFieldID(clazz, "mResult", "I");
1205    if (field_mResult == NULL) {
1206        LOGE("Can't find MtpPropertyList.mResult");
1207        return -1;
1208    }
1209    field_mObjectHandles = env->GetFieldID(clazz, "mObjectHandles", "[I");
1210    if (field_mObjectHandles == NULL) {
1211        LOGE("Can't find MtpPropertyList.mObjectHandles");
1212        return -1;
1213    }
1214    field_mPropertyCodes = env->GetFieldID(clazz, "mPropertyCodes", "[I");
1215    if (field_mPropertyCodes == NULL) {
1216        LOGE("Can't find MtpPropertyList.mPropertyCodes");
1217        return -1;
1218    }
1219    field_mDataTypes = env->GetFieldID(clazz, "mDataTypes", "[I");
1220    if (field_mDataTypes == NULL) {
1221        LOGE("Can't find MtpPropertyList.mDataTypes");
1222        return -1;
1223    }
1224    field_mLongValues = env->GetFieldID(clazz, "mLongValues", "[J");
1225    if (field_mLongValues == NULL) {
1226        LOGE("Can't find MtpPropertyList.mLongValues");
1227        return -1;
1228    }
1229    field_mStringValues = env->GetFieldID(clazz, "mStringValues", "[Ljava/lang/String;");
1230    if (field_mStringValues == NULL) {
1231        LOGE("Can't find MtpPropertyList.mStringValues");
1232        return -1;
1233    }
1234
1235    if (AndroidRuntime::registerNativeMethods(env,
1236                "android/mtp/MtpDatabase", gMtpDatabaseMethods, NELEM(gMtpDatabaseMethods)))
1237        return -1;
1238
1239    return AndroidRuntime::registerNativeMethods(env,
1240                "android/mtp/MtpPropertyGroup", gMtpPropertyGroupMethods, NELEM(gMtpPropertyGroupMethods));
1241}
1242