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package org.apache.cayenne.enhancer;

import org.objectweb.asm.ClassVisitor;

/**
 * A factory for the ASM ClassVisitors used during class enhancement.
 * 
 * @since 3.0
 * @author Andrus Adamchik
 */
public interface EnhancerVisitorFactory {

    /**
     * Creates and returns an ASM ClassVisitor for enhancing a class. Returned visitor is
     * either null if no enhancement of this class is needed, or a wrapper around provided
     * "out" ClassVisitor. Often it is a chain of visitors, each doing its own
     * enhancement.
     */
    ClassVisitor createVisitor(String className, ClassVisitor out);
}
