EnhancerHelper.java

/*
 * Copyright (c) 2011-2014 Jeppetto and Jonathan Thompson
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.iternine.jeppetto.enhance;


import javassist.CtMethod;


public class EnhancerHelper {

    //-------------------------------------------------------------
    // Methods - Public - Static
    //-------------------------------------------------------------

    @SuppressWarnings({ "unchecked" })
    public static <T> Enhancer<T> makePersistentEnhancer(Class<T> baseClass) {
        if (Snapshot.class.isAssignableFrom(baseClass)) {
            return new NoOpEnhancer<T>(baseClass);
        } else {
            return (Enhancer<T>) new SnapshotBytecodeEnhancer(baseClass);
        }
    }


    //-------------------------------------------------------------
    // Inner Class - 
    //-------------------------------------------------------------

    public static class SnapshotBytecodeEnhancer<T> extends VelocityEnhancer<T> {

        //-------------------------------------------------------------
        // Constructors
        //-------------------------------------------------------------

        public SnapshotBytecodeEnhancer(Class<T> baseClass) {
            super(baseClass);
        }


        //-------------------------------------------------------------
        // Implementation - Enhancer
        //-------------------------------------------------------------

        @Override
        public boolean needsEnhancement(Object object) {
            return object != null && !(object instanceof Snapshot);
        }


        //-------------------------------------------------------------
        // Implementation - VelocityEnhancer
        //-------------------------------------------------------------

        @Override
        protected String getTemplateLocation() {
            return "snapshot.vm";
        }


        @Override
        protected boolean shouldEnhanceMethod(CtMethod method) {
            return true;
        }
    }
}