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/*
* Copyright 2012 Sebastian Annies, Hamburg
*
* 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.googlecode.mp4parser.util;
import java.io.EOFException;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.ByteChannel;
/**
* Creates a <code>ReadableByteChannel</code> that is backed by a <code>ByteBuffer</code>.
*/
public class ByteBufferByteChannel implements ByteChannel {
ByteBuffer byteBuffer;
public ByteBufferByteChannel(ByteBuffer byteBuffer) {
this.byteBuffer = byteBuffer;
}
public int read(ByteBuffer dst) throws IOException {
byte[] b = dst.array();
int r = dst.remaining();
if (byteBuffer.remaining() >= r) {
byteBuffer.get(b, dst.position(), r);
return r;
} else {
throw new EOFException("Reading beyond end of stream");
}
}
public boolean isOpen() {
return true;
}
public void close() throws IOException {
}
public int write(ByteBuffer src) throws IOException {
int r = src.remaining();
byteBuffer.put(src);
return r;
}
}
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