/*******************************************************************************
* Copyright (c) 2005, 2015 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 Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.ui.internal.dialogs;
import java.util.Collection;
import java.util.HashSet;
import org.eclipse.jface.preference.IPreferenceNode;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;
/**
* The PreferenceNodeFilter is a filter that only matches
* a set of ids.
*/
public class PreferenceNodeFilter extends ViewerFilter {
Collection ids = new HashSet();
/**
* Create a new instance of the receiver on a
* list of filteredIds.
* @param filteredIds The collection of ids that
* will be shown.
*/
public PreferenceNodeFilter(String[] filteredIds) {
super();
for (String filteredId : filteredIds) {
ids.add(filteredId);
}
}
@Override
public boolean select(Viewer viewer, Object parentElement, Object element) {
return checkNodeAndChildren((IPreferenceNode) element);
}
/**
* Check to see if the node or any of its children
* have an id in the ids.
* @param node WorkbenchPreferenceNode
* @return boolean <code>true</code> if node or oe of its children
* has an id in the ids.
*/
private boolean checkNodeAndChildren(IPreferenceNode node) {
if(ids.contains(node.getId())) {
return true;
}
for (IPreferenceNode subNode : node.getSubNodes()) {
if(checkNodeAndChildren(subNode)) {
return true;
}
}
return false;
}
}