137 lines
4.2 KiB
C++
137 lines
4.2 KiB
C++
/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "FileBackupHelper_native"
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#include <utils/Log.h>
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#include "JNIHelp.h"
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#include <android_runtime/AndroidRuntime.h>
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#include <utils/BackupHelpers.h>
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namespace android
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{
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// java.io.FileDescriptor
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static jfieldID s_descriptorField = 0;
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static int
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ctor(JNIEnv* env, jobject clazz)
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{
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return (int)new RestoreHelperBase();
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}
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static void
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dtor(JNIEnv* env, jobject clazz, jint ptr)
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{
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delete (RestoreHelperBase*)ptr;
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}
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static int
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performBackup_native(JNIEnv* env, jobject clazz, jobject oldState, int data,
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jobject newState, jobjectArray files, jobjectArray keys)
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{
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int err;
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// all parameters have already been checked against null
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int oldStateFD = oldState != NULL ? env->GetIntField(oldState, s_descriptorField) : -1;
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int newStateFD = env->GetIntField(newState, s_descriptorField);
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BackupDataWriter* dataStream = (BackupDataWriter*)data;
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const int fileCount = env->GetArrayLength(files);
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char const** filesUTF = (char const**)malloc(sizeof(char*)*fileCount);
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for (int i=0; i<fileCount; i++) {
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filesUTF[i] = env->GetStringUTFChars((jstring)env->GetObjectArrayElement(files, i), NULL);
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}
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const int keyCount = env->GetArrayLength(keys);
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char const** keysUTF = (char const**)malloc(sizeof(char*)*keyCount);
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for (int i=0; i<keyCount; i++) {
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keysUTF[i] = env->GetStringUTFChars((jstring)env->GetObjectArrayElement(keys, i), NULL);
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}
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err = back_up_files(oldStateFD, dataStream, newStateFD, filesUTF, keysUTF, fileCount);
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for (int i=0; i<fileCount; i++) {
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env->ReleaseStringUTFChars((jstring)env->GetObjectArrayElement(files, i), filesUTF[i]);
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}
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free(filesUTF);
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for (int i=0; i<keyCount; i++) {
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env->ReleaseStringUTFChars((jstring)env->GetObjectArrayElement(keys, i), keysUTF[i]);
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}
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free(keysUTF);
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return err;
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}
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static int
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writeFile_native(JNIEnv* env, jobject clazz, jint ptr, jstring filenameObj, int backupReaderPtr)
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{
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int err;
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RestoreHelperBase* restore = (RestoreHelperBase*)ptr;
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BackupDataReader* reader = (BackupDataReader*)backupReaderPtr;
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char const* filename;
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filename = env->GetStringUTFChars(filenameObj, NULL);
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err = restore->WriteFile(String8(filename), reader);
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env->ReleaseStringUTFChars(filenameObj, filename);
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return err;
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}
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static int
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writeSnapshot_native(JNIEnv* env, jobject clazz, jint ptr, jobject fileDescriptor)
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{
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int err;
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RestoreHelperBase* restore = (RestoreHelperBase*)ptr;
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int fd = env->GetIntField(fileDescriptor, s_descriptorField);
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err = restore->WriteSnapshot(fd);
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return err;
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}
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static const JNINativeMethod g_methods[] = {
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{ "ctor", "()I", (void*)ctor },
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{ "dtor", "(I)V", (void*)dtor },
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{ "performBackup_native",
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"(Ljava/io/FileDescriptor;ILjava/io/FileDescriptor;[Ljava/lang/String;[Ljava/lang/String;)I",
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(void*)performBackup_native },
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{ "writeFile_native", "(ILjava/lang/String;I)I", (void*)writeFile_native },
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{ "writeSnapshot_native", "(ILjava/io/FileDescriptor;)I", (void*)writeSnapshot_native },
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};
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int register_android_backup_FileBackupHelperBase(JNIEnv* env)
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{
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jclass clazz;
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clazz = env->FindClass("java/io/FileDescriptor");
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LOG_FATAL_IF(clazz == NULL, "Unable to find class java.io.FileDescriptor");
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s_descriptorField = env->GetFieldID(clazz, "descriptor", "I");
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LOG_FATAL_IF(s_descriptorField == NULL,
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"Unable to find descriptor field in java.io.FileDescriptor");
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return AndroidRuntime::registerNativeMethods(env, "android/app/backup/FileBackupHelperBase",
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g_methods, NELEM(g_methods));
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}
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}
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