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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based @AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step. This library is a superset of AspectJ weaver and hence also of AspectJ runtime.

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/*******************************************************************************
 * Copyright (c) 2005 Contributors.
 * All rights reserved.
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Public License v 2.0
 * which accompanies this distribution and is available at
 * https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
 *
 * Contributors:
 *   Alexandre Vasseur         initial implementation
 *******************************************************************************/
package org.aspectj.weaver.loadtime;

import org.aspectj.bridge.AbortException;
import org.aspectj.bridge.IMessage;
import org.aspectj.bridge.IMessageHandler;

/**
 * @author Alexandre Vasseur (alex AT gnilux DOT com)
 */
public class DefaultMessageHandler implements IMessageHandler {

    boolean isVerbose = false;
    boolean isDebug = false;
    boolean showWeaveInfo = false;
    boolean showWarn = true;

    public boolean handleMessage(IMessage message) throws AbortException {
        if (isIgnoring(message.getKind())) {
    		return false;
    	} else {
    		/*
    		 * TODO maw We ship this class but don't use or document it. Changed
    		 * to use stderr instead of stdout to allow improvements to LTW tests.
    		 * Currently many pass whether or not LTW occurs because they are
    		 * already woven. Some changed to check for appropriate weaving messages
    		 * as well as absence of warnings or errors.
    		 */
    		return SYSTEM_ERR.handleMessage(message);
//            if (message.getKind().isSameOrLessThan(IMessage.INFO)) {
//                return SYSTEM_OUT.handleMessage(message);
//            } else {
//                return SYSTEM_ERR.handleMessage(message);
//            }
        }
    }

    public boolean isIgnoring(IMessage.Kind kind) {
        if (kind.equals(IMessage.WEAVEINFO)) {
            return !showWeaveInfo;
        }
        if (kind.isSameOrLessThan(IMessage.INFO)) {
            return !isVerbose;
        }
        if (kind.isSameOrLessThan(IMessage.DEBUG)) {
            return !isDebug;
        }
        return !showWarn;
    }

    public void dontIgnore(IMessage.Kind kind) {
        if (kind.equals(IMessage.WEAVEINFO)) {
            showWeaveInfo = true;
        } else if (kind.equals(IMessage.DEBUG)) {
            isVerbose = true;
        } else if (kind.equals(IMessage.WARNING)) {
            showWarn = false;
        }
    }

	public void ignore(IMessage.Kind kind) {
        if (kind.equals(IMessage.WEAVEINFO)) {
            showWeaveInfo = false;
        } else if (kind.equals(IMessage.DEBUG)) {
            isVerbose = false;
        } else if (kind.equals(IMessage.WARNING)) {
            showWarn = true;
        }
	}

}