001/*
002  GRANITE DATA SERVICES
003  Copyright (C) 2013 GRANITE DATA SERVICES S.A.S.
004
005  This file is part of Granite Data Services.
006
007  Granite Data Services is free software; you can redistribute it and/or modify
008  it under the terms of the GNU Library General Public License as published by
009  the Free Software Foundation; either version 2 of the License, or (at your
010  option) any later version.
011
012  Granite Data Services is distributed in the hope that it will be useful, but
013  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
014  FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
015  for more details.
016
017  You should have received a copy of the GNU Library General Public License
018  along with this library; if not, see <http://www.gnu.org/licenses/>.
019*/
020
021package org.granite.messaging.jmf.codec.std.impl;
022
023import java.io.IOException;
024import java.io.OutputStream;
025
026import org.granite.messaging.jmf.DumpContext;
027import org.granite.messaging.jmf.InputContext;
028import org.granite.messaging.jmf.OutputContext;
029import org.granite.messaging.jmf.codec.std.FloatCodec;
030
031/**
032 * @author Franck WOLFF
033 */
034public class FloatCodecImpl extends AbstractStandardCodec<Float> implements FloatCodec {
035
036        public int getObjectType() {
037                return JMF_FLOAT_OBJECT;
038        }
039
040        public Class<?> getObjectClass() {
041                return Float.class;
042        }
043
044        public int getPrimitiveType() {
045                return JMF_FLOAT;
046        }
047
048        public Class<?> getPrimitiveClass() {
049                return Float.TYPE;
050        }
051
052        public void encode(OutputContext ctx, Float v) throws IOException {
053                writeFloatData(ctx, JMF_FLOAT_OBJECT, v.floatValue());
054        }
055        
056        public Float decode(InputContext ctx, int parameterizedJmfType) throws IOException {
057                int jmfType = ctx.getSharedContext().getCodecRegistry().extractJmfType(parameterizedJmfType);
058                
059                if (jmfType != JMF_FLOAT_OBJECT)
060                        throw newBadTypeJMFEncodingException(jmfType, parameterizedJmfType);
061
062                return Float.valueOf(readFloatData(ctx, parameterizedJmfType));
063        }
064
065        public void encodePrimitive(OutputContext ctx, float v) throws IOException {
066                writeFloatData(ctx, JMF_FLOAT, v);
067        }
068        
069        public float decodePrimitive(InputContext ctx) throws IOException {
070                int parameterizedJmfType = ctx.safeRead();
071                int jmfType = ctx.getSharedContext().getCodecRegistry().extractJmfType(parameterizedJmfType);
072                
073                if (jmfType != JMF_FLOAT)
074                        throw newBadTypeJMFEncodingException(jmfType, parameterizedJmfType);
075                
076                return readFloatData(ctx, parameterizedJmfType);
077        }
078        
079        public void dump(DumpContext ctx, int parameterizedJmfType) throws IOException {
080                int jmfType = ctx.getSharedContext().getCodecRegistry().extractJmfType(parameterizedJmfType);
081                
082                switch (jmfType) {
083                case JMF_FLOAT:
084                        ctx.indentPrintLn("float: " + readFloatData(ctx, parameterizedJmfType));
085                        break;
086                case JMF_FLOAT_OBJECT:
087                        ctx.indentPrintLn(Float.class.getName() + ": " + Float.valueOf(readFloatData(ctx, parameterizedJmfType)));
088                        break;
089                default:
090                        throw newBadTypeJMFEncodingException(jmfType, parameterizedJmfType);
091                }
092        }
093        
094        public static void writeFloatData(OutputContext ctx, int jmfType, float v) throws IOException {
095                int bits = Float.floatToIntBits(v);
096                
097                final OutputStream os = ctx.getOutputStream();
098                
099                os.write(jmfType);
100                
101                os.write(bits);
102                os.write(bits >> 8);
103                os.write(bits >> 16);
104                os.write(bits >> 24);
105        }
106        
107        public static float readFloatData(InputContext ctx, int type) throws IOException {
108                int i = ctx.safeRead();
109                
110                i |= ctx.safeRead() << 8;
111                i |= ctx.safeRead() << 16;
112                i |= ctx.safeRead() << 24;
113                
114                return Float.intBitsToFloat(i);
115        }
116}