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/*
This file is part of GNUnet.
(C) 2011, 2012 Christian Grothoff (and other contributing authors)
GNUnet 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 3, or (at your
option) any later version.
GNUnet 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 GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
package org.gnunet.construct.parsers;
import org.gnunet.construct.Message;
import org.gnunet.construct.ProtocolViolationException;
import org.gnunet.construct.ReflectUtil;
import java.lang.reflect.Field;
import java.nio.ByteBuffer;
import java.util.LinkedList;
import java.util.List;
/**
* A Sequence of Parsers that operate on the same object.
* @author Florian Dold
*
*/
public class SequenceParser implements Parser {
private final List<Parser> childParsers = new LinkedList<Parser>();
private List<Field> myFrameSizePath;
public SequenceParser() {
}
public void add(final Parser p) {
childParsers.add(p);
}
@Override
public int getSize(final Message src) {
int size = 0;
for (final Parser p : childParsers) {
size += p.getSize(src);
}
return size;
}
@Override
public int parse(final ByteBuffer srcBuf, int frameOffset,
Message frameObj, final Message dst, List<Field> frameSizePath) {
int size = 0;
for (final Parser p : childParsers) {
try {
size += p.parse(srcBuf, frameOffset, frameObj, dst,
frameSizePath == null ? myFrameSizePath : frameSizePath);
} catch (ProtocolViolationException e) {
throw e.augmentPath("(sequence parser)");
}
}
return size;
}
@Override
public int write(final ByteBuffer dstBuf, final Message src) {
int size = 0;
for (final Parser p : childParsers) {
size += p.write(dstBuf, src);
}
return size;
}
@Override
public void patch(Message m, int frameSize, List<Field> frameSizePath, Message frameObj) {
// todo: this should be optimized / only be done by the topmost sequence parse => introduce a boolean parameter
if (myFrameSizePath != null) {
ReflectUtil.justSetInt(frameObj, myFrameSizePath, frameSize);
}
for (final Parser p : childParsers) {
p.patch(m, frameSize, frameSizePath == null ? myFrameSizePath : frameSizePath, frameObj);
}
}
@Override
public int getStaticSize() {
int accum = 0;
for (Parser p : childParsers) {
accum += p.getStaticSize();
}
return accum;
}
public void setFrameSizePath(List<Field> frameSizePath) {
this.myFrameSizePath = frameSizePath;
}
}
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