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/*
This file is part of GNUnet.
Copyright (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 java.lang.reflect.Field;
import java.nio.ByteBuffer;
import java.util.List;
public class DoubleParser implements Parser {
private final Field targetField;
public DoubleParser(Field f) {
targetField = f;
}
@Override
public int getSize(Message srcObj) {
return Double.SIZE / 8;
}
@Override
public int parse(ByteBuffer srcBuf, int frameOffset, Message frameObj, Message dstObj, List<Field> frameSizePath) {
double d = srcBuf.getDouble();
try {
targetField.setDouble(dstObj, d);
} catch (IllegalAccessException e) {
throw new AssertionError("cannot access field (should have been caught in Construct)");
}
return Double.SIZE / 8;
}
@Override
public int write(ByteBuffer dstBuf, Message srcObj) {
double d;
try {
d = targetField.getDouble(srcObj);
} catch (IllegalAccessException e) {
throw new AssertionError("field does not exist (should be caught in Construct)");
}
dstBuf.putDouble(d);
return 8;
}
@Override
public void patch(Message m, int frameSize, List<Field> frameSizePath, Message frameObj) {
// nothing to do here
}
@Override
public int getStaticSize() {
return Double.SIZE / 8;
}
}
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