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
021 package org.granite.messaging.jmf.codec.std.impl;
022
023 import java.io.IOException;
024 import java.io.OutputStream;
025
026 import org.granite.messaging.jmf.DumpContext;
027 import org.granite.messaging.jmf.InputContext;
028 import org.granite.messaging.jmf.OutputContext;
029 import org.granite.messaging.jmf.codec.std.FloatCodec;
030
031 /**
032 * @author Franck WOLFF
033 */
034 public 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 }