001 /**
002 * GRANITE DATA SERVICES
003 * Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004 *
005 * This file is part of the Granite Data Services Platform.
006 *
007 * Granite Data Services is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * Granite Data Services is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
015 * General Public License for more details.
016 *
017 * You should have received a copy of the GNU Lesser General Public
018 * License along with this library; if not, write to the Free Software
019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
020 * USA, or see <http://www.gnu.org/licenses/>.
021 */
022 package org.granite.messaging.jmf.codec.std.impl;
023
024 import java.io.IOException;
025 import java.io.OutputStream;
026 import java.math.BigInteger;
027
028 import org.granite.messaging.jmf.DumpContext;
029 import org.granite.messaging.jmf.InputContext;
030 import org.granite.messaging.jmf.OutputContext;
031 import org.granite.messaging.jmf.codec.std.BigIntegerCodec;
032
033 /**
034 * @author Franck WOLFF
035 */
036 public class BigIntegerCodecImpl extends AbstractIntegerStringCodec<BigInteger> implements BigIntegerCodec {
037
038 public int getObjectType() {
039 return JMF_BIG_INTEGER;
040 }
041
042 public Class<?> getObjectClass() {
043 return BigInteger.class;
044 }
045
046 public void encode(OutputContext ctx, BigInteger v) throws IOException {
047 final OutputStream os = ctx.getOutputStream();
048
049 ctx.addToStoredObjects(v);
050
051 byte[] magnitude = v.toByteArray();
052
053 IntegerComponents ics = intComponents(magnitude.length);
054 os.write((ics.length << 6) | JMF_BIG_INTEGER);
055 writeIntData(ctx, ics);
056
057 os.write(magnitude);
058 }
059
060 public BigInteger decode(InputContext ctx, int parameterizedJmfType) throws IOException {
061 int jmfType = ctx.getSharedContext().getCodecRegistry().extractJmfType(parameterizedJmfType);
062
063 if (jmfType != JMF_BIG_INTEGER)
064 throw newBadTypeJMFEncodingException(jmfType, parameterizedJmfType);
065
066 int magnitudeLength = readIntData(ctx, (parameterizedJmfType >> 6) & 0x03, false);
067
068 byte[] magnitude = new byte[magnitudeLength];
069 ctx.safeReadFully(magnitude);
070
071 BigInteger v = new BigInteger(magnitude);
072
073 if (BigInteger.ZERO.equals(v))
074 v = BigInteger.ZERO;
075 else if (BigInteger.ONE.equals(v))
076 v = BigInteger.ONE;
077 else if (BigInteger.TEN.equals(v))
078 v = BigInteger.TEN;
079
080 return v;
081 }
082
083 public void dump(DumpContext ctx, int parameterizedJmfType) throws IOException {
084 int jmfType = ctx.getSharedContext().getCodecRegistry().extractJmfType(parameterizedJmfType);
085 if (jmfType != JMF_BIG_INTEGER)
086 throw newBadTypeJMFEncodingException(jmfType, parameterizedJmfType);
087 ctx.indentPrintLn(BigInteger.class.getName() + ": " + decode(ctx, parameterizedJmfType));
088 }
089 }