org.jscsi.parser.datasegment.BinaryDataSegment Maven / Gradle / Ivy
/**
* Copyright (c) 2012, University of Konstanz, Distributed Systems Group All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation and/or other materials provided with the
* distribution. * Neither the name of the University of Konstanz nor the names of its contributors may be used to
* endorse or promote products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.jscsi.parser.datasegment;
import java.nio.ByteBuffer;
/**
* BinaryDataSegment
*
* This class represents a binary data segment, which is attached by several ProtocolDataUnit objects.
*
* @author Volker Wildi
*/
final class BinaryDataSegment extends AbstractDataSegment {
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
/**
* Constructor to create a new, empty BinaryDataSegment object with the given chunk size.
*
* @param chunkSize The maximum number of bytes of a chunk.
*/
public BinaryDataSegment (final int chunkSize) {
super(chunkSize);
}
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
/** {@inheritDoc} */
public final int deserialize (final ByteBuffer src, final int len) {
resizeBuffer(src.remaining(), false);
dataBuffer.rewind();
transferBytes(src, dataBuffer, len);
return dataBuffer.limit();
}
/** {@inheritDoc} */
public final int append (final ByteBuffer src, final int len) {
if (src == null) { throw new NullPointerException(); }
dataBuffer.position(length);
resizeBuffer(length + len, true);
transferBytes(src, dataBuffer, len);
return dataBuffer.limit();
}
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
private final void transferBytes (final ByteBuffer src, final ByteBuffer dst, final int len) {
if (dst.remaining() < len) { throw new IllegalArgumentException("The given length must be less or equal than the remaining bytes in the destination buffer."); }
for (int i = 0; i < len; i++) {
if (src.hasRemaining() && dst.hasRemaining()) {
dst.put(src.get());
} else {
throw new RuntimeException("Error by transferring the bytes in this data segment.");
}
}
}
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
}