/*
* JBoss, Home of Professional Open Source
*
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* by the @author tags. See the COPYRIGHT.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.teiid.netty.handler.codec.serialization;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectStreamClass;
import java.io.StreamCorruptedException;
/**
* @author The Netty Project (netty-dev@lists.jboss.org)
* @author Trustin Lee (tlee@redhat.com)
*
* @version $Rev: 381 $, $Date: 2008-10-01 06:06:18 -0500 (Wed, 01 Oct 2008) $
*
*/
public class CompactObjectInputStream extends ObjectInputStream {
private final ClassLoader classLoader;
CompactObjectInputStream(InputStream in) throws IOException {
this(in, null);
}
public CompactObjectInputStream(InputStream in, ClassLoader classLoader) throws IOException {
super(in);
this.classLoader = classLoader;
}
@Override
protected void readStreamHeader() throws IOException,
StreamCorruptedException {
int version = readByte() & 0xFF;
if (version != STREAM_VERSION) {
throw new StreamCorruptedException(
"Unsupported version: " + version); //$NON-NLS-1$
}
}
@Override
protected ObjectStreamClass readClassDescriptor()
throws IOException, ClassNotFoundException {
int type = read();
if (type < 0) {
throw new EOFException();
}
switch (type) {
case CompactObjectOutputStream.TYPE_PRIMITIVE:
return super.readClassDescriptor();
case CompactObjectOutputStream.TYPE_NON_PRIMITIVE:
String className = readUTF();
Class<?> clazz;
if (classLoader == null) {
clazz = Class.forName(
className, true,
CompactObjectInputStream.class.getClassLoader());
} else {
clazz = Class.forName(className, true, classLoader);
}
return ObjectStreamClass.lookupAny(clazz);
default:
clazz = CompactObjectOutputStream.KNOWN_CODES.get(type);
if (clazz != null) {
return ObjectStreamClass.lookupAny(clazz);
}
throw new StreamCorruptedException(
"Unexpected class descriptor type: " + type); //$NON-NLS-1$
}
}
@Override
protected Class<?> resolveClass(ObjectStreamClass desc) throws IOException, ClassNotFoundException {
String name = desc.getName();
try {
return Class.forName(name, false, classLoader);
} catch (ClassNotFoundException ex) {
return super.resolveClass(desc);
}
}
}