plugins/org.eclipse.objectteams.otdt.compiler.adaptor/src/org/eclipse/objectteams/otdt/internal/compiler/adaptor/ResourceProjectAdaptor.java

/**********************************************************************
 * This file is part of "Object Teams Development Tooling"-Software
 * 
 * Copyright 2008, 2010 Technical University Berlin, Germany.
 * 
 * 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
 * 
 * Please visit http://www.eclipse.org/objectteams for updates and contact.
 * 
 * Contributors:
 * Technical University Berlin - Initial API and implementation
 **********************************************************************/
package org.eclipse.objectteams.otdt.internal.compiler.adaptor;

import org.eclipse.objectteams.otdt.compiler.adaptor.CompilerAdaptorPlugin;
import org.objectteams.LiftingVetoException;
import org.objectteams.Team;

import base org.eclipse.core.internal.resources.Project;
import base org.eclipse.core.resources.IProject;

/**
 * Simple decoration of class Project from org.eclipse.core.resources.
 *  
 * @author stephan
 * @since 1.1.8
 */
@SuppressWarnings("restriction")
public team class ResourceProjectAdaptor 
{
	private static ResourceProjectAdaptor instance;
	public ResourceProjectAdaptor() {
		instance= this;
	}
	public static ResourceProjectAdaptor getDefault() { return instance; }

	protected class AbstractOTEquinoxProject playedBy IProject {
		protected AspectBindingReader aspectBindingReader;
		protected BaseImportChecker checker;
		public String toString() => String toString();
		protected boolean hasAspectDataChanged () {
			// instead of marking this method and role abstract actually catch 
			// when lifting ends up here rather than in OTEquinoxProject as intended:
			String message = "Failed to create role for project "+this.toString();
			CompilerAdaptorPlugin.logException(message, new RuntimeException(message));
			return false; 
		}
	}
	/** Associate an AspectBindingReader and a BaseImportChecker to each OT Plugin project. */
	protected class OTEquinoxProject extends AbstractOTEquinoxProject playedBy Project
	{

		/** 
		 * Lifting constructor which refuses lifting for non OT-plugin projects,
		 * or if the project is not yet ready for reading plugin.xml. 
		 */
		public OTEquinoxProject(Project baseProject) {
			try {
				if (!ProjectUtil.isOTPluginProject(baseProject))
					throw new org.objectteams.LiftingVetoException();
				this.aspectBindingReader = new AspectBindingReader(baseProject); // may also throw LVE.
				this.checker= new BaseImportChecker(this.aspectBindingReader);
			} catch (LiftingVetoException lve) {
				// no success: unregister this useless role
				ResourceProjectAdaptor.this.unregisterRole(this, OTEquinoxProject.class);
				throw lve; // will be caught in several clients within AdaptorActivator
			}
		}
		/** ask for changes to determine if classpath has to be recomputed: */
		protected boolean hasAspectDataChanged () {
			return this.aspectBindingReader != null
				&& this.aspectBindingReader.fetchHasChanges();
		}
	}

	// ======== API: =========
	
	public Team getChecker(IProject as AbstractOTEquinoxProject project) 
			throws LiftingVetoException
	{
		return project.checker;
	}
	public AspectBindingReader getAspectBindingReader(IProject as AbstractOTEquinoxProject project) 
			throws LiftingVetoException
	{
		return project.aspectBindingReader;
	}
	public boolean hasAspectDataChanged(IProject as AbstractOTEquinoxProject project)  
			throws LiftingVetoException
	{
		return project.hasAspectDataChanged();
	}

}