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package org.apache.cayenne.jpa.enhancer;
import java.util.Map;
import org.apache.cayenne.enhancer.EnhancerVisitorFactory;
import org.apache.cayenne.enhancer.PersistentInterfaceVisitor;
import org.apache.cayenne.jpa.map.JpaClassDescriptor;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.commons.SerialVersionUIDAdder;
/**
* Class enhancer used for JPA.
*
* @author Andrus Adamchik
*/
public class JpaEnhancerVisitorFactory implements EnhancerVisitorFactory {
private Map<String, JpaClassDescriptor> managedClasses;
public JpaEnhancerVisitorFactory(Map<String, JpaClassDescriptor> managedClasses) {
this.managedClasses = managedClasses;
}
public ClassVisitor createVisitor(String className, ClassVisitor out) {
JpaClassDescriptor descriptor = managedClasses.get(className.replace('/', '.'));
if (descriptor == null) {
return null;
}
// from here the code is copied essentially verbatim
// from CayenneEnhancerVisitorFactory.
// create enhancer chain
PersistentInterfaceVisitor e1 = new PersistentInterfaceVisitor(out);
JpaAccessorVisitor e2 = new JpaAccessorVisitor(e1, descriptor);
// this ensures that both enhanced and original classes have compatible serialized
// format even if no serialVersionUID is defined by the user
SerialVersionUIDAdder e3 = new SerialVersionUIDAdder(e2);
return e3;
}
}