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;
026
027import org.granite.messaging.jmf.DumpContext;
028import org.granite.messaging.jmf.InputContext;
029import org.granite.messaging.jmf.OutputContext;
030import org.granite.messaging.jmf.codec.std.FloatCodec;
031
032/**
033 * @author Franck WOLFF
034 */
035public class FloatCodecImpl extends AbstractStandardCodec<Float> implements FloatCodec {
036
037        public int getObjectType() {
038                return JMF_FLOAT_OBJECT;
039        }
040
041        public Class<?> getObjectClass() {
042                return Float.class;
043        }
044
045        public int getPrimitiveType() {
046                return JMF_FLOAT;
047        }
048
049        public Class<?> getPrimitiveClass() {
050                return Float.TYPE;
051        }
052
053        public void encode(OutputContext ctx, Float v) throws IOException {
054                writeFloatData(ctx, JMF_FLOAT_OBJECT, v.floatValue());
055        }
056        
057        public Float decode(InputContext ctx, int parameterizedJmfType) throws IOException {
058                int jmfType = ctx.getSharedContext().getCodecRegistry().extractJmfType(parameterizedJmfType);
059                
060                if (jmfType != JMF_FLOAT_OBJECT)
061                        throw newBadTypeJMFEncodingException(jmfType, parameterizedJmfType);
062
063                return Float.valueOf(readFloatData(ctx, parameterizedJmfType));
064        }
065
066        public void encodePrimitive(OutputContext ctx, float v) throws IOException {
067                writeFloatData(ctx, JMF_FLOAT, v);
068        }
069        
070        public float decodePrimitive(InputContext ctx) throws IOException {
071                int parameterizedJmfType = ctx.safeRead();
072                int jmfType = ctx.getSharedContext().getCodecRegistry().extractJmfType(parameterizedJmfType);
073                
074                if (jmfType != JMF_FLOAT)
075                        throw newBadTypeJMFEncodingException(jmfType, parameterizedJmfType);
076                
077                return readFloatData(ctx, parameterizedJmfType);
078        }
079        
080        public void dump(DumpContext ctx, int parameterizedJmfType) throws IOException {
081                int jmfType = ctx.getSharedContext().getCodecRegistry().extractJmfType(parameterizedJmfType);
082                
083                switch (jmfType) {
084                case JMF_FLOAT:
085                        ctx.indentPrintLn("float: " + readFloatData(ctx, parameterizedJmfType));
086                        break;
087                case JMF_FLOAT_OBJECT:
088                        ctx.indentPrintLn(Float.class.getName() + ": " + Float.valueOf(readFloatData(ctx, parameterizedJmfType)));
089                        break;
090                default:
091                        throw newBadTypeJMFEncodingException(jmfType, parameterizedJmfType);
092                }
093        }
094        
095        public static void writeFloatData(OutputContext ctx, int jmfType, float v) throws IOException {
096                int bits = Float.floatToIntBits(v);
097                
098                final OutputStream os = ctx.getOutputStream();
099                
100                os.write(jmfType);
101                
102                os.write(bits);
103                os.write(bits >> 8);
104                os.write(bits >> 16);
105                os.write(bits >> 24);
106        }
107        
108        public static float readFloatData(InputContext ctx, int type) throws IOException {
109                int i = ctx.safeRead();
110                
111                i |= ctx.safeRead() << 8;
112                i |= ctx.safeRead() << 16;
113                i |= ctx.safeRead() << 24;
114                
115                return Float.intBitsToFloat(i);
116        }
117}