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/* Copyright 2017 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
package org.brotli.wrapper.enc;
import java.io.IOException;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.channels.ClosedChannelException;
import java.nio.channels.WritableByteChannel;
/**
* WritableByteChannel that wraps native brotli encoder.
*/
public class BrotliEncoderChannel extends Encoder implements WritableByteChannel {
/** The default internal buffer size used by the decoder. */
private static final int DEFAULT_BUFFER_SIZE = 16384;
private final Object mutex = new Object();
/**
* Creates a BrotliEncoderChannel.
*
* @param destination underlying destination
* @param params encoding settings
* @param bufferSize intermediate buffer size
*/
public BrotliEncoderChannel(WritableByteChannel destination, Encoder.Parameters params,
int bufferSize) throws IOException {
super(destination, params, bufferSize);
}
public BrotliEncoderChannel(WritableByteChannel destination, Encoder.Parameters params)
throws IOException {
this(destination, params, DEFAULT_BUFFER_SIZE);
}
public BrotliEncoderChannel(WritableByteChannel destination) throws IOException {
this(destination, new Encoder.Parameters());
}
@Override
public boolean isOpen() {
synchronized (mutex) {
return !closed;
}
}
@Override
public void close() throws IOException {
synchronized (mutex) {
super.close();
}
}
@Override
public int write(ByteBuffer src) throws IOException {
synchronized (mutex) {
if (closed) {
throw new ClosedChannelException();
}
int result = 0;
while (src.hasRemaining() && encode(EncoderJNI.Operation.PROCESS)) {
int limit = Math.min(src.remaining(), inputBuffer.remaining());
ByteBuffer slice = src.slice();
((Buffer) slice).limit(limit);
inputBuffer.put(slice);
result += limit;
((Buffer) src).position(src.position() + limit);
}
return result;
}
}
}
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