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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) 2006 IBM Corporation and others.
 * 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:
 *     Matthew Webster - initial implementation
 *******************************************************************************/
package org.aspectj.weaver.tools;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintStream;

public class DefaultTraceFactory extends TraceFactory {

	public final static String ENABLED_PROPERTY = "org.aspectj.tracing.enabled";
	public final static String FILE_PROPERTY = "org.aspectj.tracing.file";

    private boolean tracingEnabled = getBoolean(ENABLED_PROPERTY,false);
    private PrintStream print;

    public DefaultTraceFactory() {
		String filename = System.getProperty(FILE_PROPERTY);
		if (filename != null) {
			File file = new File(filename);
			try {
				print = new PrintStream(new FileOutputStream(file));
			}
			catch (IOException ex) {
	    		if (debug) ex.printStackTrace();
			}
		}
	}

    public boolean isEnabled() {
		return tracingEnabled;
	}

    public Trace getTrace (Class clazz) {
    	DefaultTrace trace = new DefaultTrace(clazz);
    	trace.setTraceEnabled(tracingEnabled);
    	if (print != null) trace.setPrintStream(print);
    	return trace;
    }

}