/*******************************************************************************
* Copyright (c) 1998, 2009 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.internal.descriptors;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import org.eclipse.persistence.internal.security.PrivilegedAccessHelper;
import org.eclipse.persistence.internal.security.PrivilegedNewInstanceFromClass;
import org.eclipse.persistence.mappings.transformers.*;
/**
* INTERNAL:
* An implementation of FieldTransformation which holds onto a transformer class-name
* which will be instantiated to do transformations
*
* @author mmacivor
* @since OracleAS TopLink 10<i>g</i> (10.0.3)
*/
public class TransformerBasedFieldTransformation extends FieldTransformation {
protected Class transformerClass;
protected String transformerClassName;
protected FieldTransformer transformer;
public TransformerBasedFieldTransformation() {
super();
}
public TransformerBasedFieldTransformation(FieldTransformer aTransformer) {
transformer = aTransformer;
if (transformer != null) {
setTransformerClass(transformer.getClass());
setTransformerClassName(transformer.getClass().getName());
}
}
public Class getTransformerClass() {
return transformerClass;
}
public void setTransformerClass(Class transformerClass) {
this.transformerClass = transformerClass;
}
public String getTransformerClassName() {
return transformerClassName;
}
public void setTransformerClassName(String transformerClassName) {
this.transformerClassName = transformerClassName;
}
public FieldTransformer buildTransformer() throws Exception {
if (transformer == null) {
Class transformerClass = getTransformerClass();
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){
try{
transformer = (FieldTransformer)AccessController.doPrivileged(new PrivilegedNewInstanceFromClass(transformerClass));
}catch (PrivilegedActionException ex){
throw (Exception)ex.getCause();
}
}else{
transformer = (FieldTransformer)PrivilegedAccessHelper.newInstanceFromClass(transformerClass);
}
}
return transformer;
}
}