/*
* Copyright 2016 Google Inc. All Rights Reserved.
*
* 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 com.google.devrel.gmscore.tools.apk.arsc;
import java.io.DataOutput;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.LinkedHashMap;
import java.util.Map;
import javax.annotation.Nullable;
/** Represents a chunk whose payload is a list of sub-chunks. */
public abstract class ChunkWithChunks extends Chunk {
private final Map<Integer, Chunk> chunks = new LinkedHashMap<>();
protected ChunkWithChunks(ByteBuffer buffer, @Nullable Chunk parent) {
super(buffer, parent);
}
@Override
protected void init(ByteBuffer buffer) {
super.init(buffer);
chunks.clear();
int start = this.offset + getHeaderSize();
int offset = start;
int end = this.offset + getOriginalChunkSize();
int position = buffer.position();
buffer.position(start);
while (offset < end) {
Chunk chunk = Chunk.newInstance(buffer, this);
chunks.put(offset, chunk);
offset += chunk.getOriginalChunkSize();
}
buffer.position(position);
}
/**
* Retrieves the @{code chunks} contained in this chunk.
*
* @return map of buffer offset -> chunk contained in this chunk.
*/
public final Map<Integer, Chunk> getChunks() {
return chunks;
}
@Override
protected void writePayload(DataOutput output, ByteBuffer header, boolean shrink)
throws IOException {
for (Chunk chunk : getChunks().values()) {
byte[] chunkBytes = chunk.toByteArray(shrink);
output.write(chunkBytes);
writePad(output, chunkBytes.length);
}
}
}