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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.Array;
import java.lang.reflect.Field;
import java.nio.BufferUnderflowException;
import java.nio.ByteBuffer;
import java.util.List;
public class FixedSizeIntegerArrayParser implements Parser {
private final int byteSize;
private final boolean signed;
private final Field targetField;
private final int elemNumber;
public FixedSizeIntegerArrayParser(final int elemNumber, boolean signed, int byteSize, final Field f) {
targetField = f;
this.elemNumber = elemNumber;
this.signed = signed;
this.byteSize = byteSize;
}
@Override
public int getSize(final Message srcObj) {
return byteSize * elemNumber;
}
@Override
public int parse(ByteBuffer srcBuf, int frameOffset,
Message frameObj, final Message dstObj, List<Field> frameSizePath) {
int size = 0;
@SuppressWarnings("unchecked")
final Class<Message> arrayElementType = (Class<Message>) targetField.getType().getComponentType();
if (!arrayElementType.isPrimitive()) {
throw new AssertionError("IntegerFillParser is expected to be of primitive type, not " + arrayElementType);
}
final Object arr = Array.newInstance(targetField.getType().getComponentType(), elemNumber);
ReflectUtil.justSet(dstObj, targetField, arr);
for (int i = 0; i < elemNumber; ++i) {
long v;
try {
v = IntegerUtil.readLong(srcBuf, signed, byteSize);
} catch (BufferUnderflowException e) {
throw new ProtocolViolationException("fixed size array underflow: " + targetField.toString());
}
ReflectUtil.justSetArray(arr, i, v);
}
return size;
}
@Override
public int write(final ByteBuffer dstBuf,
final Message srcObj) {
int size = 0;
final Object arr = ReflectUtil.justGet(srcObj, targetField);
if (Array.getLength(arr) != elemNumber) {
throw new AssertionError("wrong number of elements");
}
for (int i = 0; i < Array.getLength(arr); ++i) {
IntegerUtil.writeLong(Array.getLong(arr, i), dstBuf, signed, byteSize);
size += byteSize;
}
return size;
}
@Override
public void patch(Message m, int frameSize, List<Field> frameSizePath, Message frameObj) {
// nothing to patch!
}
@Override
public int getStaticSize() {
return elemNumber * byteSize;
}
}
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