/*******************************************************************************
* Copyright (c) 1998, 2008 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.
*
* @author Kyle Chen
* @since Eclipselink 1.0
******************************************************************************/
package org.eclipse.persistence.internal.jpa.metadata.tables;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import org.eclipse.persistence.exceptions.EntityManagerSetupException;
import org.eclipse.persistence.internal.helper.Helper;
import org.eclipse.persistence.internal.security.PrivilegedAccessHelper;
import org.eclipse.persistence.internal.security.PrivilegedMethodInvoker;
/**
* This class only contains the common helper methods that can be accessed at
* package-private level.
*
* @author Kyle Chen
* @since TopLink 11g
*/
final class MetadataHelper {
/**
* INTERNAL:
* Invoke the specified named method on the object, handling the necessary
* exceptions.
*/
static Object invokeMethod(String methodName, Object target) {
Method method = null;
try {
method = Helper.getDeclaredMethod(target.getClass(), methodName);
} catch (NoSuchMethodException e) {
EntityManagerSetupException.methodInvocationFailed(method, target,e);
}
if (method != null) {
try {
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){
try {
return AccessController.doPrivileged(new PrivilegedMethodInvoker(method, target));
} catch (PrivilegedActionException exception) {
Exception throwableException = exception.getException();
if (throwableException instanceof IllegalAccessException) {
throw EntityManagerSetupException.cannotAccessMethodOnObject(method, target);
} else {
throw EntityManagerSetupException.methodInvocationFailed(method, target, throwableException);
}
}
} else {
return PrivilegedAccessHelper.invokeMethod(method, target);
}
} catch (IllegalAccessException ex1) {
throw EntityManagerSetupException.cannotAccessMethodOnObject(method, target);
} catch (InvocationTargetException ex2) {
throw EntityManagerSetupException.methodInvocationFailed(method, target, ex2);
}
} else {
return null;
}
}
}