/*******************************************************************************
* Copyright (c) 2006, 2007 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM - Initial API and implementation
* James D Miles (IBM Corp.) - bug 191783, NullPointerException in FeatureDownloader
*******************************************************************************/
package org.eclipse.update.internal.core;
import java.net.URL;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
public class UpdateSession {
private boolean enabled = false;
private Set visitedURLs = Collections.synchronizedSet(new HashSet());
UpdateSession() {
}
public boolean isVisited(URL url) {
if (!enabled)
return false;
return visitedURLs.contains(url.toExternalForm());
}
public void markVisited(URL url) {
if (!enabled)
return ;
visitedURLs.add(url.toExternalForm());
}
/*
* Session will not start caching URLs prior to calling this
* method. If you want to use update session facility make sure
* you call this method first
*/
public void reset() {
this.enabled = true;
visitedURLs.clear();
}
}