HHH-4799 - Create a *unit* test that asserts SerializationHelper's ability to deser a class using an "isolated classloader" (aka a TCCL)

git-svn-id: https://svn.jboss.org/repos/hibernate/core/trunk@18657 1b8cb986-b30d-0410-93ca-fae66ebed9b2
This commit is contained in:
Steve Ebersole 2010-01-27 19:16:39 +00:00
parent 016a02ff50
commit d04362e464
2 changed files with 134 additions and 0 deletions

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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program 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 distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.util;
import java.io.Serializable;
/**
* TODO : javadoc
*
* @author Steve Ebersole
*/
public class SerializableThing implements Serializable {
}

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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program 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 distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.util;
import java.io.InputStream;
import java.io.Serializable;
import junit.framework.TestCase;
import org.hibernate.bytecode.util.ByteCodeHelper;
/**
* This is basically a test to assert the expectations of {@link org.hibernate.type.SerializableType}
* in regards to deserializing bytes from second level caches.
*
* @author Steve Ebersole
*/
public class SerializationHelperTest extends TestCase {
private ClassLoader original;
private CustomClassLoader custom;
protected void setUp() throws Exception {
original = Thread.currentThread().getContextClassLoader();
custom = new CustomClassLoader( original );
Thread.currentThread().setContextClassLoader( custom );
}
protected void tearDown() throws Exception {
Thread.currentThread().setContextClassLoader( original );
}
public void testSerializeDeserialize() throws Exception {
Class clazz = Thread.currentThread().getContextClassLoader().loadClass( "org.hibernate.util.SerializableThing" );
Object instance = clazz.newInstance();
// SerializableType.toBytes() logic, as called from SerializableType.disassemble()
byte[] bytes = SerializationHelper.serialize( (Serializable) instance );
// SerializableType.fromBytes() logic, as called from SerializableType.assemble
// NOTE : specifically we use Serializable.class.getClassLoader for the CL in many cases
// which are the problematic cases
Object instance2 = SerializationHelper.deserialize( bytes, Serializable.class.getClassLoader() );
assertEquals( instance.getClass(), instance2.getClass() );
assertEquals( instance.getClass().getClassLoader(), instance2.getClass().getClassLoader() );
assertEquals( custom, instance2.getClass().getClassLoader() );
}
public static class CustomClassLoader extends ClassLoader {
public CustomClassLoader(ClassLoader parent) {
super( parent );
}
public Class loadClass(String name) throws ClassNotFoundException {
if ( ! name.equals( "org.hibernate.util.SerializableThing" ) ) {
return getParent().loadClass( name );
}
Class c = findLoadedClass( name );
if ( c != null ) {
return c;
}
InputStream is = this.getResourceAsStream( name.replace( '.', '/' ) + ".class" );
if ( is == null ) {
throw new ClassNotFoundException( name + " not found" );
}
try {
byte[] bytecode = ByteCodeHelper.readByteCode( is );
return defineClass( name, bytecode, 0, bytecode.length );
}
catch( Throwable t ) {
throw new ClassNotFoundException( name + " not found", t );
}
}
}
}