org.eclipse.persistence.internal.xr.XRDynamicClassLoader Maven / Gradle / Ivy
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/*
* Copyright (c) 1998, 2018 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 v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0,
* or the Eclipse Distribution License v. 1.0 which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
*/
// Contributors:
// Oracle - initial API and implementation from Oracle TopLink
package org.eclipse.persistence.internal.xr;
//EclipseLink imports
import org.eclipse.persistence.dynamic.DynamicClassLoader;
/**
*
* INTERNAL: XRDynamicClassLoader uses ASM to dynamically
* generate subclasses of {@link XRDynamicEntity}
*
* @author Mike Norman - [email protected]
* @since EclipseLink 1.x
*/
public class XRDynamicClassLoader extends DynamicClassLoader {
public static final String COLLECTION_WRAPPER_SUFFIX =
"_CollectionWrapper";
private Boolean generateSubclasses = Boolean.TRUE;
public XRDynamicClassLoader(ClassLoader parentLoader) {
super(parentLoader, new XRClassWriter());
}
@Override
protected Class findClass(String className) throws ClassNotFoundException {
if (!generateSubclasses.booleanValue()) {
throw new ClassNotFoundException(className);
}
try {
byte[] data = defaultWriter.writeClass(this, className);
return defineClass(className, data, 0, data.length);
}
catch (ClassFormatError cfe) {
throw new ClassNotFoundException(className, cfe);
}
catch (ClassCircularityError cce) {
throw new ClassNotFoundException(className, cce);
}
}
public void dontGenerateSubclasses() {
this.generateSubclasses = Boolean.TRUE;
}
}