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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.
*/
package android.backup;
import android.content.Context;
import java.io.FileDescriptor;
import java.io.IOException;
/** @hide */
public class BackupDataOutput {
int mBackupWriter;
public static final int OP_UPDATE = 1;
public static final int OP_DELETE = 2;
public BackupDataOutput(FileDescriptor fd) {
if (fd == null) throw new NullPointerException();
mBackupWriter = ctor(fd);
if (mBackupWriter == 0) {
throw new RuntimeException("Native initialization failed with fd=" + fd);
}
}
// A dataSize of -1 indicates that the record under this key should be deleted
public int writeEntityHeader(String key, int dataSize) throws IOException {
int result = writeEntityHeader_native(mBackupWriter, key, dataSize);
if (result >= 0) {
return result;
} else {
throw new IOException("result=0x" + Integer.toHexString(result));
}
}
public int writeEntityData(byte[] data, int size) throws IOException {
int result = writeEntityData_native(mBackupWriter, data, size);
if (result >= 0) {
return result;
} else {
throw new IOException("result=0x" + Integer.toHexString(result));
}
}
public void setKeyPrefix(String keyPrefix) {
setKeyPrefix_native(mBackupWriter, keyPrefix);
}
protected void finalize() throws Throwable {
try {
dtor(mBackupWriter);
} finally {
super.finalize();
}
}
private native static int ctor(FileDescriptor fd);
private native static void dtor(int mBackupWriter);
private native static int writeEntityHeader_native(int mBackupWriter, String key, int dataSize);
private native static int writeEntityData_native(int mBackupWriter, byte[] data, int size);
private native static void setKeyPrefix_native(int mBackupWriter, String keyPrefix);
}
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