org.aspectj.weaver.loadtime.ClassPreProcessorAgentAdapter.java Source code

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Here is the source code for org.aspectj.weaver.loadtime.ClassPreProcessorAgentAdapter.java

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/*******************************************************************************
 * Copyright (c) 2005,2018 Contributors.
 * All rights reserved.
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution and is available at
 * http://eclipse.org/legal/epl-v10.html
 *******************************************************************************/
package org.aspectj.weaver.loadtime;

import java.lang.instrument.ClassFileTransformer;
import java.lang.instrument.IllegalClassFormatException;
import java.security.ProtectionDomain;

/**
 * Java 1.5 adapter for class pre processor
 * 
 * @author Alexandre Vasseur
 * @author Andy Clement
 */
public class ClassPreProcessorAgentAdapter implements ClassFileTransformer {

    private static ClassPreProcessor classPreProcessor;

    static {
        try {
            classPreProcessor = new Aj();
            classPreProcessor.initialize();
        } catch (Exception e) {
            throw new ExceptionInInitializerError(
                    "could not initialize JSR163 preprocessor due to: " + e.toString());
        }
    }

    /**
     * Invokes the weaver to modify some set of input bytes.
     * 
     * @param loader the defining class loader
     * @param className the name of class being loaded
     * @param classBeingRedefined is set when hotswap is being attempted
     * @param protectionDomain the protection domain for the class being loaded
     * @param bytes the incoming bytes (before weaving)
     * @return the woven bytes
     */
    @Override
    public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined,
            ProtectionDomain protectionDomain, byte[] bytes) throws IllegalClassFormatException {
        if (classBeingRedefined != null) {
            System.err.println("INFO: (Enh120375):  AspectJ attempting reweave of '" + className + "'");
            classPreProcessor.prepareForRedefinition(loader, className);
        }
        return classPreProcessor.preProcess(className, bytes, loader, protectionDomain);
    }
}