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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, 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.lang.reflect.Field;

/**
 * Helper methods related to string localization.
 * 
 * @since org.eclipse.equinox.common 3.3
 */
public class LocalizationUtils {
	/**
	 * This method can be used in the absence of NLS class. The method tries to 
	 * use the NLS-based translation routine. If it falls, the method returns the original
	 * non-translated key.
	 * 
	 * @param key case-sensitive name of the filed in the translation file representing 
	 * the string to be translated
	 * @return The localized message or the non-translated key
	 */
	static public String safeLocalize(String key) {
		try {
			Class messageClass = Class.forName("org.eclipse.core.internal.runtime.CommonMessages"); //$NON-NLS-1$
			if (messageClass == null)
				return key;
			Field field = messageClass.getDeclaredField(key);
			if (field == null)
				return key;
			Object value = field.get(null);
			if (value instanceof String)
				return (String) value;
		} catch (ClassNotFoundException | NoClassDefFoundError | SecurityException | NoSuchFieldException | IllegalArgumentException | IllegalAccessException e) {
			// eat exception and fall through
		}
		return key;
	}
}