/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package net.sourceforge.phpdt.internal.core;

import net.sourceforge.phpdt.core.IJavaModel;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.ResourcesPlugin;

/**
 * Implementation of IJavaModel. A Java Model is specific to a workspace.
 * 
 * @see IJavaModel
 */
public class JavaModelInfo extends OpenableElementInfo {

	/**
	 * A array with all the non-java projects contained by this model
	 */
	Object[] nonJavaResources;

	/**
	 * Constructs a new Java Model Info
	 */
	protected JavaModelInfo() {
	}

	/**
	 * Compute the non-java resources contained in this java project.
	 */
	private Object[] computeNonJavaResources() {
		IProject[] projects = ResourcesPlugin.getWorkspace().getRoot()
				.getProjects();
		int length = projects.length;
		Object[] nonJavaResources = null;
		int index = 0;
		for (int i = 0; i < length; i++) {
			IProject project = projects[i];
			if (!JavaProject.hasJavaNature(project)) {
				if (nonJavaResources == null) {
					nonJavaResources = new Object[length];
				}
				nonJavaResources[index++] = project;
			}
		}
		if (index == 0)
			return NO_NON_JAVA_RESOURCES;
		if (index < length) {
			System.arraycopy(nonJavaResources, 0,
					nonJavaResources = new Object[index], 0, index);
		}
		return nonJavaResources;
	}

	/**
	 * Returns an array of non-java resources contained in the receiver.
	 */
	Object[] getNonJavaResources() {

		Object[] nonJavaResources = this.nonJavaResources;
		if (nonJavaResources == null) {
			nonJavaResources = computeNonJavaResources();
			this.nonJavaResources = nonJavaResources;
		}
		return nonJavaResources;
	}
}
