| /* |
| * Copyright (C) 2009 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define LOG_TAG "FileBackupHelper_native" |
| #include <utils/Log.h> |
| |
| #include "JNIHelp.h" |
| #include <android_runtime/AndroidRuntime.h> |
| |
| #include <utils/BackupHelpers.h> |
| |
| namespace android |
| { |
| |
| // java.io.FileDescriptor |
| static jfieldID s_descriptorField = 0; |
| |
| // android.app.backup.BackupDataInput$EntityHeader |
| static jfieldID s_keyField = 0; |
| static jfieldID s_dataSizeField = 0; |
| |
| static int |
| ctor_native(JNIEnv* env, jobject clazz, jobject fileDescriptor) |
| { |
| int err; |
| |
| int fd = env->GetIntField(fileDescriptor, s_descriptorField); |
| if (fd == -1) { |
| return NULL; |
| } |
| |
| return (int)new BackupDataReader(fd); |
| } |
| |
| static void |
| dtor_native(JNIEnv* env, jobject clazz, int r) |
| { |
| delete (BackupDataReader*)r; |
| } |
| |
| static jint |
| readNextHeader_native(JNIEnv* env, jobject clazz, int r, jobject entity) |
| { |
| int err; |
| bool done; |
| BackupDataReader* reader = (BackupDataReader*)r; |
| |
| int type = 0; |
| |
| err = reader->ReadNextHeader(&done, &type); |
| if (done) { |
| return 1; |
| } |
| |
| if (err != 0) { |
| return err < 0 ? err : -1; |
| } |
| |
| switch (type) { |
| case BACKUP_HEADER_ENTITY_V1: |
| { |
| String8 key; |
| size_t dataSize; |
| err = reader->ReadEntityHeader(&key, &dataSize); |
| if (err != 0) { |
| return err < 0 ? err : -1; |
| } |
| // TODO: Set the fields in the entity object |
| jstring keyStr = env->NewStringUTF(key.string()); |
| env->SetObjectField(entity, s_keyField, keyStr); |
| env->SetIntField(entity, s_dataSizeField, dataSize); |
| return 0; |
| } |
| default: |
| LOGD("Unknown header type: 0x%08x\n", type); |
| return -1; |
| } |
| |
| // done |
| return 1; |
| } |
| |
| static jint |
| readEntityData_native(JNIEnv* env, jobject clazz, int r, jbyteArray data, int offset, int size) |
| { |
| int err; |
| BackupDataReader* reader = (BackupDataReader*)r; |
| |
| if (env->GetArrayLength(data) < (size+offset)) { |
| // size mismatch |
| return -1; |
| } |
| |
| jbyte* dataBytes = env->GetByteArrayElements(data, NULL); |
| if (dataBytes == NULL) { |
| return -2; |
| } |
| |
| err = reader->ReadEntityData(dataBytes+offset, size); |
| |
| env->ReleaseByteArrayElements(data, dataBytes, 0); |
| |
| return err; |
| } |
| |
| static jint |
| skipEntityData_native(JNIEnv* env, jobject clazz, int r) |
| { |
| int err; |
| BackupDataReader* reader = (BackupDataReader*)r; |
| |
| err = reader->SkipEntityData(); |
| |
| return err; |
| } |
| |
| static const JNINativeMethod g_methods[] = { |
| { "ctor", "(Ljava/io/FileDescriptor;)I", (void*)ctor_native }, |
| { "dtor", "(I)V", (void*)dtor_native }, |
| { "readNextHeader_native", "(ILandroid/app/backup/BackupDataInput$EntityHeader;)I", |
| (void*)readNextHeader_native }, |
| { "readEntityData_native", "(I[BII)I", (void*)readEntityData_native }, |
| { "skipEntityData_native", "(I)I", (void*)skipEntityData_native }, |
| }; |
| |
| int register_android_backup_BackupDataInput(JNIEnv* env) |
| { |
| //LOGD("register_android_backup_BackupDataInput"); |
| |
| jclass clazz; |
| |
| clazz = env->FindClass("java/io/FileDescriptor"); |
| LOG_FATAL_IF(clazz == NULL, "Unable to find class java.io.FileDescriptor"); |
| s_descriptorField = env->GetFieldID(clazz, "descriptor", "I"); |
| LOG_FATAL_IF(s_descriptorField == NULL, |
| "Unable to find descriptor field in java.io.FileDescriptor"); |
| |
| clazz = env->FindClass("android/app/backup/BackupDataInput$EntityHeader"); |
| LOG_FATAL_IF(clazz == NULL, "Unable to find class android.app.backup.BackupDataInput.EntityHeader"); |
| s_keyField = env->GetFieldID(clazz, "key", "Ljava/lang/String;"); |
| LOG_FATAL_IF(s_keyField == NULL, |
| "Unable to find key field in android.app.backup.BackupDataInput.EntityHeader"); |
| s_dataSizeField = env->GetFieldID(clazz, "dataSize", "I"); |
| LOG_FATAL_IF(s_dataSizeField == NULL, |
| "Unable to find dataSize field in android.app.backup.BackupDataInput.EntityHeader"); |
| |
| return AndroidRuntime::registerNativeMethods(env, "android/app/backup/BackupDataInput", |
| g_methods, NELEM(g_methods)); |
| } |
| |
| } |