org.eclipse.core.internal.runtime.DevClassPathHelper Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of aspectjtools Show documentation

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.

There is a newer version: 1.9.22.1

Show newest version

/*******************************************************************************
 * Copyright (c) 2004, 2015 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
 *     Sergey Prigogin (Google) - use parameterized types (bug 442021)
 *******************************************************************************/
package org.eclipse.core.internal.runtime;

import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.*;

public class DevClassPathHelper {

	// command line options
	public static final String PROP_DEV = "osgi.dev"; //$NON-NLS-1$

	static protected boolean inDevelopmentMode = false;
	static protected String[] devDefaultClasspath;
	static protected Properties devProperties = null;

	static {
		// Check the osgi.dev property to see if dev classpath entries have been defined.
		String osgiDev = Activator.getContext() == null ? System.getProperty(PROP_DEV) : Activator.getContext().getProperty(PROP_DEV);
		if (osgiDev != null) {
			try {
				inDevelopmentMode = true;
				URL location = new URL(osgiDev);
				devProperties = load(location);
				if (devProperties != null)
					devDefaultClasspath = getArrayFromList(devProperties.getProperty("*")); //$NON-NLS-1$
			} catch (MalformedURLException e) {
				devDefaultClasspath = getArrayFromList(osgiDev);
			}
		}
	}

	public static String[] getDevClassPath(String id) {
		String[] result = null;
		if (id != null && devProperties != null) {
			String entry = devProperties.getProperty(id);
			if (entry != null)
				result = getArrayFromList(entry);
		}
		if (result == null)
			result = devDefaultClasspath;
		return result;
	}

	/**
	 * Returns the result of converting a list of comma-separated tokens into an array
	 * 
	 * @return the array of string tokens
	 * @param prop the initial comma-separated string
	 */
	public static String[] getArrayFromList(String prop) {
		if (prop == null || prop.trim().equals("")) //$NON-NLS-1$
			return new String[0];
		Vector list = new Vector<>();
		StringTokenizer tokens = new StringTokenizer(prop, ","); //$NON-NLS-1$
		while (tokens.hasMoreTokens()) {
			String token = tokens.nextToken().trim();
			if (!token.equals("")) //$NON-NLS-1$
				list.addElement(token);
		}
		return list.isEmpty() ? new String[0] : (String[]) list.toArray(new String[list.size()]);
	}

	public static boolean inDevelopmentMode() {
		return inDevelopmentMode;
	}

	/*
	 * Load the given properties file
	 */
	private static Properties load(URL url) {
		Properties props = new Properties();
		try {
			try (InputStream is = url.openStream()) {
				props.load(is);
			}
		} catch (IOException e) {
			// TODO consider logging here
		}
		return props;
	}
}