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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, 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
 *     James Blackburn (Broadcom Corp.) - ongoing development
 *     Lars Vogel  - Bug 473427
 *******************************************************************************/
package org.eclipse.core.internal.resources;

import java.util.HashMap;
import org.eclipse.core.internal.events.BuildCommand;
import org.eclipse.core.resources.ICommand;
import org.eclipse.core.resources.IProjectNature;
import org.eclipse.core.runtime.content.IContentTypeMatcher;

public class ProjectInfo extends ResourceInfo {

	/** The description of this object */
	protected ProjectDescription description;

	/** The list of natures for this project */
	protected HashMap natures;

	/** The property store for this resource (used only by the compatibility fragment) */
	protected Object propertyStore;

	/** The content type matcher for this project. */
	protected IContentTypeMatcher matcher;

	/**
	 * Discards stale natures on this project after project description
	 * has changed.
	 */
	public synchronized void discardNatures() {
		natures = null;
	}

	/**
	 * Default constructor (for easier debugging)
	 */
	public ProjectInfo() {
		super();
	}

	/**
	 * Discards any stale state on this project after it has been moved.  Builder
	 * instances must be cleared because they reference the old project handle.
	 */
	public synchronized void fixupAfterMove() {
		natures = null;
		// note that the property store instance will be recreated lazily
		propertyStore = null;
		if (description != null) {
			ICommand[] buildSpec = description.getBuildSpec(false);
			for (ICommand element : buildSpec)
				((BuildCommand) element).setBuilders(null);
		}
	}

	/**
	 * Returns the description associated with this info.  The return value may be null.
	 */
	public ProjectDescription getDescription() {
		return description;
	}

	/**
	 * Returns the content type matcher associated with this info.  The return value may be null.
	 */
	public IContentTypeMatcher getMatcher() {
		return matcher;
	}

	public IProjectNature getNature(String natureId) {
		// thread safety: (Concurrency001)
		HashMap temp = natures;
		if (temp == null)
			return null;
		return temp.get(natureId);
	}

	/**
	 * Returns the property store associated with this info.  The return value may be null.
	 */
	@Override
	public Object getPropertyStore() {
		return propertyStore;
	}

	/**
	 * Sets the description associated with this info.  The value may be null.
	 */
	public void setDescription(ProjectDescription value) {
		if (description != null) {
			//if we already have a description, assign the new
			//build spec on top of the old one to ensure we maintain
			//any existing builder instances in the old build commands
			ICommand[] oldSpec = description.buildSpec;
			ICommand[] newSpec = value.buildSpec;
			value.buildSpec = oldSpec;
			value.setBuildSpec(newSpec);
		}
		description = value;
	}

	/**
	 * Sets the content type matcher to be associated with this info.  The value may be null.
	 */
	public void setMatcher(IContentTypeMatcher matcher) {
		this.matcher = matcher;
	}

	@SuppressWarnings({"unchecked"})
	public synchronized void setNature(String natureId, IProjectNature value) {
		// thread safety: (Concurrency001)
		if (value == null) {
			if (natures == null)
				return;
			HashMap temp = (HashMap) natures.clone();
			temp.remove(natureId);
			if (temp.isEmpty())
				natures = null;
			else
				natures = temp;
		} else {
			HashMap temp = natures;
			if (temp == null)
				temp = new HashMap<>(5);
			else
				temp = (HashMap) natures.clone();
			temp.put(natureId, value);
			natures = temp;
		}
	}

	/**
	 * Sets the property store associated with this info.  The value may be null.
	 */
	@Override
	public void setPropertyStore(Object value) {
		propertyStore = value;
	}
}