/**
* Copyright (C) 2009-2010 Wilfred Springer
*
* This file is part of Preon.
*
* Preon is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2, or (at your option) any later version.
*
* Preon is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* Preon; see the file COPYING. If not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Linking this library statically or dynamically with other modules is making a
* combined work based on this library. Thus, the terms and conditions of the
* GNU General Public License cover the whole combination.
*
* As a special exception, the copyright holders of this library give you
* permission to link this library with independent modules to produce an
* executable, regardless of the license terms of these independent modules, and
* to copy and distribute the resulting executable under terms of your choice,
* provided that you also meet, for each linked independent module, the terms
* and conditions of the license of that module. An independent module is a
* module which is not derived from or based on this library. If you modify this
* library, you may extend this exception to your version of the library, but
* you are not obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*/
package org.codehaus.preon.emitter;
import org.codehaus.preon.*;
import org.codehaus.preon.buffer.BitBuffer;
import org.codehaus.preon.channel.BitChannel;
import org.codehaus.preon.descriptor.PassThroughCodecDescriptor2;
import org.codehaus.preon.el.Expression;
/**
* The {@link org.codehaus.preon.Codec} constructed by the {@link org.codehaus.preon.emitter.EmittingCodecDecorator}.
*
* @author Wilfred Springer (wis)
* @param <T>
*/
public class EmittingCodec<T> implements Codec<T> {
/** The {@link org.codehaus.preon.Codec} wrapped. */
private final Codec<T> codec;
/** The {@link Emitter} to use. */
private final Emitter emitter;
/**
* Constructs a new instance.
*
* @param codec The {@link org.codehaus.preon.Codec} to wrap.
* @param emitter The {@link Emitter} to use.
*/
public EmittingCodec(Codec<T> codec, Emitter emitter) {
assert codec != null;
assert emitter != null;
this.codec = codec;
this.emitter = emitter;
}
/*
* (non-Javadoc)
*
* @see org.codehaus.preon.Codec#decode(org.codehaus.preon.buffer.BitBuffer,
* org.codehaus.preon.Resolver, org.codehaus.preon.Builder)
*/
public T decode(BitBuffer buffer, Resolver resolver, Builder builder)
throws DecodingException {
T result = null;
long pos = buffer.getActualBitPos();
emitter.markStart(codec, pos, buffer);
try {
result = codec.decode(buffer, resolver, builder);
} catch (DecodingException de) {
emitter.markFailure();
throw de;
} finally {
emitter.markEnd(codec, buffer.getActualBitPos(), buffer
.getActualBitPos()
- pos, result);
}
return result;
}
public void encode(T object, BitChannel channel, Resolver resolver) {
throw new UnsupportedOperationException();
}
/*
* (non-Javadoc)
*
* @see org.codehaus.preon.Codec#getTypes()
*/
public Class<?>[] getTypes() {
return codec.getTypes();
}
/*
* (non-Javadoc)
*
* @see org.codehaus.preon.Codec#getSize()
*/
public Expression<Integer, Resolver> getSize() {
return codec.getSize();
}
/*
* (non-Javadoc)
*
* @see org.codehaus.preon.Codec#getType()
*/
public Class<?> getType() {
return codec.getType();
}
public CodecDescriptor getCodecDescriptor() {
return new PassThroughCodecDescriptor2(codec.getCodecDescriptor(),
false);
}
}