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/*
* 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;
static int
ctor(JNIEnv* env, jobject clazz)
{
return (int)new RestoreHelperBase();
}
static void
dtor(JNIEnv* env, jobject clazz, jint ptr)
{
delete (RestoreHelperBase*)ptr;
}
static int
performBackup_native(JNIEnv* env, jobject clazz, jobject oldState, int data,
jobject newState, jobjectArray files, jobjectArray keys)
{
int err;
// all parameters have already been checked against null
int oldStateFD = oldState != NULL ? env->GetIntField(oldState, s_descriptorField) : -1;
int newStateFD = env->GetIntField(newState, s_descriptorField);
BackupDataWriter* dataStream = (BackupDataWriter*)data;
const int fileCount = env->GetArrayLength(files);
char const** filesUTF = (char const**)malloc(sizeof(char*)*fileCount);
for (int i=0; i<fileCount; i++) {
filesUTF[i] = env->GetStringUTFChars((jstring)env->GetObjectArrayElement(files, i), NULL);
}
const int keyCount = env->GetArrayLength(keys);
char const** keysUTF = (char const**)malloc(sizeof(char*)*keyCount);
for (int i=0; i<keyCount; i++) {
keysUTF[i] = env->GetStringUTFChars((jstring)env->GetObjectArrayElement(keys, i), NULL);
}
err = back_up_files(oldStateFD, dataStream, newStateFD, filesUTF, keysUTF, fileCount);
for (int i=0; i<fileCount; i++) {
env->ReleaseStringUTFChars((jstring)env->GetObjectArrayElement(files, i), filesUTF[i]);
}
free(filesUTF);
for (int i=0; i<keyCount; i++) {
env->ReleaseStringUTFChars((jstring)env->GetObjectArrayElement(keys, i), keysUTF[i]);
}
free(keysUTF);
return err;
}
static int
writeFile_native(JNIEnv* env, jobject clazz, jint ptr, jstring filenameObj, int backupReaderPtr)
{
int err;
RestoreHelperBase* restore = (RestoreHelperBase*)ptr;
BackupDataReader* reader = (BackupDataReader*)backupReaderPtr;
char const* filename;
filename = env->GetStringUTFChars(filenameObj, NULL);
err = restore->WriteFile(String8(filename), reader);
env->ReleaseStringUTFChars(filenameObj, filename);
return err;
}
static int
writeSnapshot_native(JNIEnv* env, jobject clazz, jint ptr, jobject fileDescriptor)
{
int err;
RestoreHelperBase* restore = (RestoreHelperBase*)ptr;
int fd = env->GetIntField(fileDescriptor, s_descriptorField);
err = restore->WriteSnapshot(fd);
return err;
}
static const JNINativeMethod g_methods[] = {
{ "ctor", "()I", (void*)ctor },
{ "dtor", "(I)V", (void*)dtor },
{ "performBackup_native",
"(Ljava/io/FileDescriptor;ILjava/io/FileDescriptor;[Ljava/lang/String;[Ljava/lang/String;)I",
(void*)performBackup_native },
{ "writeFile_native", "(ILjava/lang/String;I)I", (void*)writeFile_native },
{ "writeSnapshot_native", "(ILjava/io/FileDescriptor;)I", (void*)writeSnapshot_native },
};
int register_android_backup_FileBackupHelperBase(JNIEnv* env)
{
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");
return AndroidRuntime::registerNativeMethods(env, "android/app/backup/FileBackupHelperBase",
g_methods, NELEM(g_methods));
}
}
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