org.eclipse.persistence.internal.descriptors.PersistenceObjectAttributeAccessor Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of eclipselink Show documentation
Show all versions of eclipselink Show documentation
EclipseLink build based upon Git transaction 180e602
/*******************************************************************************
* Copyright (c) 1998, 2013 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.security.PrivilegedAccessHelper;
import org.eclipse.persistence.internal.security.PrivilegedGetClassLoaderForClass;
import org.eclipse.persistence.internal.security.PrivilegedGetClassLoaderFromCurrentThread;
import org.eclipse.persistence.internal.weaving.WeaverLogger;
import org.eclipse.persistence.logging.SessionLog;
/**
* Used with weaving to access attributes without using reflection.
*/
public class PersistenceObjectAttributeAccessor extends InstanceVariableAttributeAccessor {
/** Cache 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 = WeaverLogger.shouldLog(SessionLog.FINEST);
}
/**
* 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();
}
WeaverLogger.log(SessionLog.FINEST, "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();
}
WeaverLogger.log(SessionLog.FINEST, "weaving_call_persistence_set",
object.getClass().getName(),
Integer.toHexString(System.identityHashCode(contextClassLoader)),
Integer.toHexString(System.identityHashCode(objectClassLoader)));
}
((PersistenceObject)object)._persistence_set(this.attributeName, value);
}
}