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.lang.reflect.InvocationTargetException;
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.ClassCodec;
031
032public 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}