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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) 1999-2001 Xerox Corporation,
 *               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:
 *     Xerox/PARC     initial implementation
 * ******************************************************************/

package org.aspectj.ajde.ui;

import java.util.List;

import org.aspectj.ajde.Ajde;
import org.aspectj.asm.AsmManager;
import org.aspectj.asm.IProgramElement;
import org.aspectj.asm.IRelationship;
import org.aspectj.asm.IRelationshipMap;

/**
 * @author Mik Kersten
 */
public abstract class StructureViewNodeFactory {

	private final AbstractIconRegistry iconRegistry;

	public StructureViewNodeFactory(AbstractIconRegistry iconRegistry) {
		this.iconRegistry = iconRegistry;
	}

	public IStructureViewNode createNode(IProgramElement node) {
		return createNode(node, null);
	}

	public IStructureViewNode createNode(IProgramElement node, List children) {
		AbstractIcon icon = iconRegistry.getStructureIcon(node.getKind(), node.getAccessibility());

		IStructureViewNode svNode = createDeclaration(node, icon, children);
		String nodeHandle = node.getHandleIdentifier();
		// Don't put relationships on fields as they can then appear twice when building the outline -
		// once under clinit field-set nodes and once under the field declaration.
		if (nodeHandle != null && !node.getKind().equals(IProgramElement.Kind.FIELD)) {
			AsmManager manager = Ajde.getDefault().getModel();
			IRelationshipMap relMap = (manager == null ? null : manager.getRelationshipMap());
			List relationships = (relMap == null ? null : relMap.get(nodeHandle));
			if (relationships != null) {
				for (Object relationship : relationships) {
					IRelationship rel = (IRelationship) relationship;
					if (rel != null && rel.getTargets().size() > 0) {
						IStructureViewNode relNode = createRelationship(rel, iconRegistry.getIcon(rel.getKind()));
						if (relNode != null) {
							svNode.add(relNode, 0);
							for (String handle : rel.getTargets()) {
								IProgramElement link = Ajde.getDefault().getModel().getHierarchy().findElementForHandle(handle);
								if (link != null) {
									IStructureViewNode linkNode = createLink(link, iconRegistry.getStructureIcon(link.getKind(),
											link.getAccessibility()));
									relNode.add(linkNode);
								}
							}
						}
					}
				}
			}
		}
		return svNode;
	}

	/**
	 * Implementors must override this method in order to create link new nodes.
	 */
	protected abstract IStructureViewNode createLink(IProgramElement node, AbstractIcon icon);

	/**
	 * Implementors must override this method in order to create new relationship nodes.
	 *
	 * If returned node is null it will not be added to the tree.
	 */
	protected abstract IStructureViewNode createRelationship(IRelationship relationship, AbstractIcon icon);

	/**
	 * Implementors must override this method in order to create new nodes.
	 */
	protected abstract IStructureViewNode createDeclaration(IProgramElement node, AbstractIcon icon, List children);

	/**
	 * Don't show code elements under types since they show under the corresponding initializers.
	 */
	public static boolean acceptNode(IProgramElement parent, IProgramElement child) {
		if (parent.getKind() == IProgramElement.Kind.CLASS && child.getKind() == IProgramElement.Kind.CODE) {
			return false;
		} else {
			return true;
		}
	}
}