/*******************************************************************************
* Copyright (c) 1998, 2015 Oracle and/or its affiliates. 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:
* James Sutherland - initial API and implementation
******************************************************************************/
package org.eclipse.persistence.internal.descriptors;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import org.eclipse.persistence.exceptions.DescriptorException;
import org.eclipse.persistence.internal.logging.StdErrLogger;
import org.eclipse.persistence.internal.security.PrivilegedAccessHelper;
import org.eclipse.persistence.internal.security.PrivilegedGetClassLoaderForClass;
import org.eclipse.persistence.internal.security.PrivilegedGetClassLoaderFromCurrentThread;
import org.eclipse.persistence.logging.SessionLog;
/**
* Used with weaving to access attributes without using reflection.
*/
public class PersistenceObjectAttributeAccessor extends InstanceVariableAttributeAccessor {
/** Cache weaver logger finest level settings. */
private final boolean shouldLogFinest;
public PersistenceObjectAttributeAccessor(String attributeName) {
this.attributeName = attributeName.intern();
// PERF: Cache weaver logger finest level settings. It won't allow to change logger settings on the fly
// but it's less evil than evaluating it with every single getter/setter call.
shouldLogFinest = StdErrLogger.shouldLog(SessionLog.FINEST, SessionLog.WEAVER);
}
/**
* Returns the value of the attribute on the specified object.
*/
public Object getAttributeValueFromObject(Object object) {
if (shouldLogFinest) {
ClassLoader contextClassLoader;
ClassLoader objectClassLoader;
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()) {
try {
contextClassLoader = AccessController.doPrivileged(
new PrivilegedGetClassLoaderFromCurrentThread());
objectClassLoader = AccessController.doPrivileged(
new PrivilegedGetClassLoaderForClass(object.getClass()));
} catch (PrivilegedActionException ex) {
throw (RuntimeException) ex.getCause();
}
} else {
contextClassLoader = Thread.currentThread().getContextClassLoader();
objectClassLoader = object.getClass().getClassLoader();
}
StdErrLogger.log(SessionLog.FINEST, SessionLog.WEAVER, "weaving_call_persistence_get",
object.getClass().getName(),
Integer.toHexString(System.identityHashCode(contextClassLoader)),
Integer.toHexString(System.identityHashCode(objectClassLoader)));
}
return ((PersistenceObject)object)._persistence_get(this.attributeName);
}
/**
* Allow any initialization to be performed with the descriptor class.
*/
public void initializeAttributes(Class descriptorClass) throws DescriptorException {
this.attributeName = attributeName.intern();
super.initializeAttributes(descriptorClass);
}
/**
* Sets the value of the instance variable in the object to the value.
*/
public void setAttributeValueInObject(Object object, Object value) {
if (shouldLogFinest) {
ClassLoader contextClassLoader;
ClassLoader objectClassLoader;
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()) {
try {
contextClassLoader = AccessController.doPrivileged(
new PrivilegedGetClassLoaderFromCurrentThread());
objectClassLoader = AccessController.doPrivileged(
new PrivilegedGetClassLoaderForClass(object.getClass()));
} catch (PrivilegedActionException ex) {
throw (RuntimeException) ex.getCause();
}
} else {
contextClassLoader = Thread.currentThread().getContextClassLoader();
objectClassLoader = object.getClass().getClassLoader();
}
StdErrLogger.log(SessionLog.FINEST, SessionLog.WEAVER, "weaving_call_persistence_set",
object.getClass().getName(),
Integer.toHexString(System.identityHashCode(contextClassLoader)),
Integer.toHexString(System.identityHashCode(objectClassLoader)));
}
((PersistenceObject)object)._persistence_set(this.attributeName, value);
}
}