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 */
022package org.granite.messaging.jmf.codec.std.impl;
023
024import java.io.IOException;
025import java.io.OutputStream;
026import java.math.BigDecimal;
027import java.math.BigInteger;
028
029import org.granite.messaging.jmf.DumpContext;
030import org.granite.messaging.jmf.InputContext;
031import org.granite.messaging.jmf.OutputContext;
032import org.granite.messaging.jmf.codec.std.BigDecimalCodec;
033import org.granite.messaging.jmf.codec.std.impl.util.IntegerUtil;
034
035/**
036 * @author Franck WOLFF
037 */
038public class BigDecimalCodecImpl extends AbstractStandardCodec<BigDecimal> implements BigDecimalCodec {
039
040        protected static final int LENGTH_BYTE_COUNT_OFFSET = 6;
041
042        public int getObjectType() {
043                return JMF_BIG_DECIMAL;
044        }
045
046        public Class<?> getObjectClass() {
047                return BigDecimal.class;
048        }
049
050        public void encode(OutputContext ctx, BigDecimal v) throws IOException {
051                final OutputStream os = ctx.getOutputStream();
052                
053                int scale = v.scale();
054                byte[] magnitude = v.unscaledValue().toByteArray();
055
056                int count = IntegerUtil.significantIntegerBytesCount0(magnitude.length);
057                os.write((count << LENGTH_BYTE_COUNT_OFFSET) | JMF_BIG_DECIMAL);
058                IntegerUtil.encodeInteger(ctx, magnitude.length, count);
059                
060                os.write(scale);
061                os.write(magnitude);
062        }
063
064        public BigDecimal decode(InputContext ctx, int parameterizedJmfType) throws IOException {
065                int magnitudeLength = IntegerUtil.decodeInteger(ctx, parameterizedJmfType >>> LENGTH_BYTE_COUNT_OFFSET);
066                int scale = ctx.safeRead();
067
068                byte[] magnitude = new byte[magnitudeLength];
069                ctx.safeReadFully(magnitude);
070                
071                BigDecimal v = new BigDecimal(new BigInteger(magnitude), scale);
072                
073                if (BigDecimal.ZERO.equals(v))
074                        v = BigDecimal.ZERO;
075                else if (BigDecimal.ONE.equals(v))
076                        v = BigDecimal.ONE;
077                else if (BigDecimal.TEN.equals(v))
078                        v = BigDecimal.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_DECIMAL)
086                        throw newBadTypeJMFEncodingException(jmfType, parameterizedJmfType);
087                ctx.indentPrintLn(BigDecimal.class.getName() + ": " + decode(ctx, parameterizedJmfType));
088        }
089}