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.lang.reflect.InvocationTargetException;
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.ClassCodec;
031
032 public class ClassCodecImpl extends AbstractIntegerStringCodec<Object> implements ClassCodec {
033
034 protected static final StringTypeHandler TYPE_HANDLER = new StringTypeHandler() {
035
036 public int type(IntegerComponents ics, boolean reference) {
037 return (reference ? (0x40 | (ics.length << 4) | JMF_CLASS) : ((ics.length << 4) | JMF_CLASS));
038 }
039
040 public int indexOrLengthBytesCount(int parameterizedJmfType) {
041 return (parameterizedJmfType >> 4) & 0x03;
042 }
043
044 public boolean isReference(int parameterizedJmfType) {
045 return (parameterizedJmfType & 0x40) != 0;
046 }
047 };
048
049 public int getObjectType() {
050 return JMF_CLASS;
051 }
052
053 public boolean canEncode(Object v) {
054 return (v instanceof Class);
055 }
056
057 public void encode(OutputContext ctx, Object v) throws IOException, IllegalAccessException {
058 writeString(ctx, ctx.getAlias(((Class<?>)v).getName()), TYPE_HANDLER);
059 }
060
061 public Object decode(InputContext ctx, int parameterizedJmfType)
062 throws IOException, ClassNotFoundException, InstantiationException,
063 IllegalAccessException, InvocationTargetException,
064 SecurityException, NoSuchMethodException {
065 int jmfType = ctx.getSharedContext().getCodecRegistry().extractJmfType(parameterizedJmfType);
066
067 if (jmfType != JMF_CLASS)
068 throw newBadTypeJMFEncodingException(jmfType, parameterizedJmfType);
069
070 String className = readString(ctx, parameterizedJmfType, TYPE_HANDLER);
071 className = ctx.getAlias(className);
072 return ctx.getReflection().loadClass(className);
073 }
074
075 public void dump(DumpContext ctx, int parameterizedJmfType) throws IOException {
076 int jmfType = ctx.getSharedContext().getCodecRegistry().extractJmfType(parameterizedJmfType);
077
078 if (jmfType != JMF_CLASS)
079 throw newBadTypeJMFEncodingException(jmfType, parameterizedJmfType);
080
081 String className = readString(ctx, parameterizedJmfType, TYPE_HANDLER);
082 className = ctx.getAlias(className);
083 ctx.indentPrintLn(Class.class.getName() + ": " + className + ".class");
084 }
085 }