org.eclipse.ui.externaltools/Ant Tools Support/org/eclipse/ui/externaltools/internal/ant/preferences/AntClasspathContentProvider.java

/*******************************************************************************
 * 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 org.eclipse.ui.externaltools.internal.ant.preferences;


import java.io.File;
import java.net.URL;
import java.util.ArrayList;
import java.util.Iterator;

import org.eclipse.jface.viewers.ViewerSorter;
import org.eclipse.ui.externaltools.internal.ui.ExternalToolsContentProvider;

/**
 * Content provider that maintains a list of URLs which are shown in a table
 * viewer.
 */
public class AntClasspathContentProvider extends ExternalToolsContentProvider {
	
	/**
	 * @see org.eclipse.ui.externaltools.internal.ui.ExternalToolsContentProvider#add(java.lang.Object)
	 */
	public void add(Object o) {
		URL newURL = (URL) o;
		File newFile= new File(newURL.getFile());
		Iterator itr = elements.iterator();
		File existingFile;
		while (itr.hasNext()) {
			URL url = (URL) itr.next();
			existingFile= new File(url.getFile());
			if (existingFile.equals(newFile)) {
				return;
			}
		}
		elements.add(o);
		viewer.add(o);
	}

	public void removeAll() {
		if (viewer != null) {
			viewer.remove(elements.toArray());
		}
		elements = new ArrayList(5);
	}
	/**
	 * @see org.eclipse.ui.externaltools.internal.ui.ExternalToolsContentProvider#getSorter()
	 */
	protected ViewerSorter getSorter() {
		return null;
	}
}