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
027 import org.granite.messaging.jmf.DumpContext;
028 import org.granite.messaging.jmf.InputContext;
029 import org.granite.messaging.jmf.OutputContext;
030 import org.granite.messaging.jmf.codec.std.FloatCodec;
031
032 /**
033 * @author Franck WOLFF
034 */
035 public 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 bits = ctx.safeRead();
110
111 bits |= ctx.safeRead() << 8;
112 bits |= ctx.safeRead() << 16;
113 bits |= ctx.safeRead() << 24;
114
115 return Float.intBitsToFloat(bits);
116 }
117 }