/*
 * Contributions to FindBugs
 * Copyright (C) 2008, Andrei Loskutov
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package de.tobject.findbugs.view.explorer;

import java.util.Set;

import org.eclipse.core.resources.IMarker;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;

import de.tobject.findbugs.FindbugsPlugin;
import de.tobject.findbugs.reporter.MarkerUtil;

/**
 * @author Andrei
 */
public class BugByIdFilter extends ViewerFilter {

    private static Set<String> lastUsedFilter;

    static {
        final IPreferenceStore store = FindbugsPlugin.getDefault().getPreferenceStore();
        lastUsedFilter = FindbugsPlugin.getFilteredIds();
        store.addPropertyChangeListener(new IPropertyChangeListener() {
            public void propertyChange(PropertyChangeEvent event) {
                lastUsedFilter = FindbugsPlugin.getFilteredIds();
            }
        });
    }

    public BugByIdFilter() {
        super();
    }

    @Override
    public boolean select(Viewer viewer, Object parentElement, Object element) {
        if (lastUsedFilter.size() == 0) {
            return true;
        }
        if (element instanceof IMarker) {
            IMarker marker = (IMarker) element;
            if (MarkerUtil.isFiltered(marker, lastUsedFilter)) {
                return false;
            }
        }
        return true;
    }

}