001: /**
002: * EasyBeans
003: * Copyright (C) 2006 Bull S.A.S.
004: * Contact: easybeans@ow2.org
005: *
006: * This library is free software; you can redistribute it and/or
007: * modify it under the terms of the GNU Lesser General Public
008: * License as published by the Free Software Foundation; either
009: * version 2.1 of the License, or any later version.
010: *
011: * This library is distributed in the hope that it will be useful,
012: * but WITHOUT ANY WARRANTY; without even the implied warranty of
013: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014: * Lesser General Public License for more details.
015: *
016: * You should have received a copy of the GNU Lesser General Public
017: * License along with this library; if not, write to the Free Software
018: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
019: * USA
020: *
021: * --------------------------------------------------------------------------
022: * $Id: CtxClassLoaderObjectInputStream.java 1970 2007-10-16 11:49:25Z benoitf $
023: * --------------------------------------------------------------------------
024: */package org.ow2.easybeans.util.marshalling;
025:
026: import java.io.IOException;
027: import java.io.InputStream;
028: import java.io.ObjectInputStream;
029: import java.io.ObjectStreamClass;
030: import java.lang.reflect.Proxy;
031:
032: /**
033: * Reader which set the context classloader when recreating the object.
034: * @author Florent Benoit
035: */
036: public class CtxClassLoaderObjectInputStream extends ObjectInputStream {
037:
038: /**
039: * This inputstream reader needs an input stream for its constructor.
040: * @param inputStream input stream containing bytes
041: * @throws IOException if super class fails
042: */
043: public CtxClassLoaderObjectInputStream(final InputStream inputStream)
044: throws IOException {
045: super (inputStream);
046: }
047:
048: /**
049: * Load the local class equivalent of the specified stream class
050: * description.
051: * @param desc an instance of class <code>ObjectStreamClass</code>
052: * @return a <code>Class</code> object corresponding to <code>desc</code>
053: * @throws IOException any of the usual input/output exceptions
054: * @throws ClassNotFoundException if class of a serialized object cannot be
055: * found
056: */
057: @Override
058: protected Class<?> resolveClass(final ObjectStreamClass desc)
059: throws IOException, ClassNotFoundException {
060: // Use the thread classloader
061: return Class.forName(desc.getName(), false, Thread
062: .currentThread().getContextClassLoader());
063: }
064:
065: /**
066: * Returns a proxy class that implements the interfaces named in a proxy
067: * class descriptor; subclasses may implement this method to read custom
068: * data from the stream along with the descriptors for dynamic proxy
069: * classes, allowing them to use an alternate loading mechanism for the
070: * interfaces and the proxy class.
071: * @param interfacesName the list of interface names that were deserialized in
072: * the proxy class descriptor
073: * @return a proxy class for the specified interfaces
074: * @throws IOException any exception thrown by the underlying
075: * <code>InputStream</code>
076: * @throws ClassNotFoundException if the proxy class or any of the named
077: * interfaces could not be found
078: * @see java.io.ObjectOutputStream#annotateProxyClass(Class)
079: * @since 1.3
080: */
081: @Override
082: protected Class<?> resolveProxyClass(final String[] interfacesName)
083: throws IOException, ClassNotFoundException {
084: // Load the interfaces with the
085: Class[] interfaces = new Class[interfacesName.length];
086: for (int i = 0; i < interfaces.length; i++) {
087: interfaces[i] = Class.forName(interfacesName[i], false,
088: Thread.currentThread().getContextClassLoader());
089: }
090:
091: // Use the thread classloader to make the proxy
092: try {
093: return Proxy.getProxyClass(Thread.currentThread()
094: .getContextClassLoader(), interfaces);
095: } catch (IllegalArgumentException e) {
096: throw new ClassNotFoundException(null, e);
097: }
098:
099: }
100:
101: }
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