/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2009-2011, 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.ejb.event;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
import org.hibernate.internal.util.ReflectHelper;
/**
* @author <a href="mailto:kabir.khan@jboss.org">Kabir Khan</a>
*/
public abstract class Callback implements Serializable {
transient protected Method callbackMethod;
public Callback(Method callbackMethod) {
this.callbackMethod = callbackMethod;
}
public Method getCallbackMethod() {
return callbackMethod;
}
public abstract void invoke(Object bean);
private void writeObject(ObjectOutputStream oos) throws IOException {
oos.defaultWriteObject();
oos.writeObject( callbackMethod.toGenericString() );
}
private void readObject(ObjectInputStream ois) throws IOException, ClassNotFoundException {
ois.defaultReadObject();
String signature = (String) ois.readObject();
StringTokenizer st = new StringTokenizer( signature, " ", false );
String usefulSignature = null;
while ( st.hasMoreElements() ) usefulSignature = (String) st.nextElement();
int parenthesis = usefulSignature.indexOf( "(" );
String methodAndClass = usefulSignature.substring( 0, parenthesis );
int lastDot = methodAndClass.lastIndexOf( "." );
String clazzName = methodAndClass.substring( 0, lastDot );
Class callbackClass = ReflectHelper.classForName( clazzName, this.getClass() );
String parametersString = usefulSignature.substring( parenthesis + 1, usefulSignature.length() - 1 );
st = new StringTokenizer( parametersString, ", ", false );
List<Class> parameters = new ArrayList<Class>();
while ( st.hasMoreElements() ) {
String parameter = (String) st.nextElement();
parameters.add( ReflectHelper.classForName( parameter, this.getClass() ) );
}
String methodName = methodAndClass.substring( lastDot + 1, methodAndClass.length() );
try {
callbackMethod = callbackClass.getDeclaredMethod(
methodName,
parameters.toArray( new Class[ parameters.size() ] )
);
if ( ! callbackMethod.isAccessible() ) {
callbackMethod.setAccessible( true );
}
}
catch (NoSuchMethodException e) {
throw new IOException( "Unable to get EJB3 callback method: " + signature + ", cause: " + e );
}
}
}