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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, 2009 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.aspectj.org.eclipse.jdt.core;

/**
 * Abstract base implementation of all classpath variable initializers.
 * Classpath variable initializers are used in conjunction with the
 * "org.aspectj.org.eclipse.jdt.core.classpathVariableInitializer" extension point.
 * 
 * Clients should subclass this class to implement a specific classpath
 * variable initializer. The subclass must have a public 0-argument
 * constructor and a concrete implementation of initialize.
 *
 * @see IClasspathEntry
 * @since 2.0
 */
public abstract class ClasspathVariableInitializer {

    /**
     * Creates a new classpath variable initializer.
     */
    public ClasspathVariableInitializer() {
    	// a classpath variable initializer must have a public 0-argument constructor
    }

    /**
     * Binds a value to the workspace classpath variable with the given name,
     * or fails silently if this cannot be done.
     * 
     * A variable initializer is automatically activated whenever a variable value
     * is needed and none has been recorded so far. The implementation of
     * the initializer can set the corresponding variable using
     * JavaCore#setClasspathVariable.
     *
     * @param variable the name of the workspace classpath variable
     *    that requires a binding
     *
     * @see JavaCore#getClasspathVariable(String)
     * @see JavaCore#setClasspathVariable(String, org.eclipse.core.runtime.IPath, org.eclipse.core.runtime.IProgressMonitor)
     * @see JavaCore#setClasspathVariables(String[], org.eclipse.core.runtime.IPath[], org.eclipse.core.runtime.IProgressMonitor)
     */
    public abstract void initialize(String variable);
}