/*
 * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */
package com.sun.hotspot.igv.graph;

import java.util.ArrayList;
import java.util.List;

/**
 *
 * @author Thomas Wuerthinger
 */
public class PredecessorSelector implements Selector {

    private Selector innerSelector;

    public PredecessorSelector(Selector innerSelector) {
        this.innerSelector = innerSelector;
    }

    public List<Figure> selected(Diagram d) {
        List<Figure> inner = innerSelector.selected(d);
        List<Figure> result = new ArrayList<Figure>();
        for (Figure f : d.getFigures()) {
            boolean saved = false;
            for (Figure f2 : f.getSuccessors()) {
                if (inner.contains(f2)) {
                    saved = true;
                }
            }

            if (saved) {
                result.add(f);
            }
        }

        return result;
    }
}