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* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
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*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
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package org.apache.cayenne.enhancer;
import java.util.HashMap;
import java.util.Map;
import org.apache.cayenne.map.EntityResolver;
import org.apache.cayenne.map.ObjEntity;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.commons.SerialVersionUIDAdder;
/**
* A factory of enhacing visitors.
*
* @since 3.0
* @author Andrus Adamchik
*/
public class CayenneEnhancerVisitorFactory implements EnhancerVisitorFactory {
protected Map<String, ObjEntity> entitiesByClass;
public CayenneEnhancerVisitorFactory(EntityResolver entityResolver) {
indexEntities(entityResolver);
}
protected void indexEntities(EntityResolver entityResolver) {
// EntityResolver doesn't have an index by class name, (let alone using
// "internal" class names with slashes as keys), so we have to build it
// manually
this.entitiesByClass = new HashMap<String, ObjEntity>();
for (Object object : entityResolver.getObjEntities()) {
ObjEntity entity = (ObjEntity) object;
entitiesByClass.put(entity.getClassName(), entity);
}
}
public ClassVisitor createVisitor(String className, ClassVisitor out) {
ObjEntity entity = entitiesByClass.get(className.replace('/', '.'));
if (entity == null) {
return null;
}
// create enhancer chain
PersistentInterfaceVisitor e1 = new PersistentInterfaceVisitor(out);
PersistentAccessorVisitor e2 = new PersistentAccessorVisitor(e1, entity);
// 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;
}
}