/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008-2011, 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.bytecode.spi;

import java.security.ProtectionDomain;

import org.hibernate.bytecode.buildtime.spi.ClassFilter;
import org.hibernate.bytecode.buildtime.spi.FieldFilter;

Basic implementation of the ClassTransformer contract.
Author:Emmanuel Bernard, Steve Ebersole
/** * Basic implementation of the {@link ClassTransformer} contract. * * @author Emmanuel Bernard * @author Steve Ebersole */
public abstract class AbstractClassTransformerImpl implements ClassTransformer { protected final ClassFilter classFilter; protected final FieldFilter fieldFilter; protected AbstractClassTransformerImpl(ClassFilter classFilter, FieldFilter fieldFilter) { this.classFilter = classFilter; this.fieldFilter = fieldFilter; } @Override public byte[] transform( ClassLoader loader, String className, Class classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) { // to be safe... className = className.replace( '/', '.' ); if ( classFilter.shouldInstrumentClass( className ) ) { return doTransform( loader, className, classBeingRedefined, protectionDomain, classfileBuffer ); } else { return classfileBuffer; } }
Delegate the transformation call from transform
Params:
  • loader – The class loader to use
  • className – The name of the class to transform
  • classBeingRedefined – If an already loaded class is being redefined, then pass this as a parameter
  • protectionDomain – The protection domain of the class being (re)defined
  • classfileBuffer – The bytes of the class file.
Returns:The transformed (enhanced/instrumented) bytes.
/** * Delegate the transformation call from {@link #transform} * * @param loader The class loader to use * @param className The name of the class to transform * @param classBeingRedefined If an already loaded class is being redefined, then pass this as a parameter * @param protectionDomain The protection domain of the class being (re)defined * @param classfileBuffer The bytes of the class file. * * @return The transformed (enhanced/instrumented) bytes. */
protected abstract byte[] doTransform( ClassLoader loader, String className, Class classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer); }