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The AspectJ weaver applies aspects to Java classes. It can be used as a Java agent in order to apply load-time weaving (LTW) during class-loading and also contains the AspectJ runtime classes.

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/* *******************************************************************
 * Copyright (c) 2002 Palo Alto Research Center, Incorporated (PARC).
 * 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:
 *     PARC     initial implementation
 * ******************************************************************/

package org.aspectj.weaver;

import java.io.PrintStream;
import java.io.PrintWriter;

import org.aspectj.bridge.context.CompilationAndWeavingContext;

/**
 * Exception to use inside the bcweaver.
 */
@SuppressWarnings("serial")
public class BCException extends RuntimeException {
	Throwable thrown;

	public BCException() {
		super();
	}

	public BCException(String s) {
		super(s + "\n" + CompilationAndWeavingContext.getCurrentContext());
	}

	public BCException(String s, Throwable thrown) {
		this(s);
		this.thrown = thrown;
	}

	public void printStackTrace() {
		printStackTrace(System.err);
	}

	public void printStackTrace(PrintStream s) {
		printStackTrace(new PrintWriter(s));
	}

	public void printStackTrace(PrintWriter s) {
		super.printStackTrace(s);
		if (null != thrown) {
			s.print("Caused by: ");
			s.print(thrown.getClass().getName());
			String message = thrown.getMessage();
			if (null != message) {
				s.print(": ");
				s.print(message);
			}
			s.println();
			thrown.printStackTrace(s);
		}
	}

}