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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) 2000, 2016 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.core.internal.filesystem;

import java.io.*;
import java.util.Date;
import org.eclipse.core.internal.runtime.RuntimeLog;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.Status;

/**
 * Grab bag of utility methods for the file system plugin
 */
public class Policy {
	public static final String PI_FILE_SYSTEM = "org.eclipse.core.filesystem"; //$NON-NLS-1$

	/**
	 * Print a debug message to the console.
	 * Pre-pend the message with the current date and the name of the current thread.
	 */
	public static void debug(String message) {
		StringBuilder buffer = new StringBuilder();
		buffer.append(new Date(System.currentTimeMillis()));
		buffer.append(" - ["); //$NON-NLS-1$
		buffer.append(Thread.currentThread().getName());
		buffer.append("] "); //$NON-NLS-1$
		buffer.append(message);
		System.out.println(buffer.toString());
	}

	public static void error(int code, String message) throws CoreException {
		error(code, message, null);
	}

	public static void error(int code, String message, Throwable exception) throws CoreException {
		int severity = code == 0 ? 0 : 1 << (code % 100 / 33);
		throw new CoreException(new Status(severity, PI_FILE_SYSTEM, code, message, exception));
	}

	public static void log(int severity, String message, Throwable t) {
		if (message == null)
			message = ""; //$NON-NLS-1$
		RuntimeLog.log(new Status(severity, PI_FILE_SYSTEM, 1, message, t));
	}

	/**
	 * Closes a stream and ignores any resulting exception.
	 */
	public static void safeClose(InputStream in) {
		try {
			if (in != null)
				in.close();
		} catch (IOException e) {
			//ignore
		}
	}

	/**
	 * Closes a stream and ignores any resulting exception.
	 */
	public static void safeClose(OutputStream out) {
		try {
			if (out != null)
				out.close();
		} catch (IOException e) {
			//ignore
		}
	}
}