001    /*
002     * Copyright (C) 2008-2010 by Holger Arndt
003     *
004     * This file is part of the Universal Java Matrix Package (UJMP).
005     * See the NOTICE file distributed with this work for additional
006     * information regarding copyright ownership and licensing.
007     *
008     * UJMP is free software; you can redistribute it and/or modify
009     * it under the terms of the GNU Lesser General Public License as
010     * published by the Free Software Foundation; either version 2
011     * of the License, or (at your option) any later version.
012     *
013     * UJMP is distributed in the hope that it will be useful,
014     * but WITHOUT ANY WARRANTY; without even the implied warranty of
015     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
016     * GNU Lesser General Public License for more details.
017     *
018     * You should have received a copy of the GNU Lesser General Public
019     * License along with UJMP; if not, write to the
020     * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
021     * Boston, MA  02110-1301  USA
022     */
023    
024    package org.ujmp.core.collections;
025    
026    import java.util.HashMap;
027    import java.util.Iterator;
028    import java.util.Map;
029    
030    public class HashMapList<K, V> extends HashMap<K, V> {
031            private static final long serialVersionUID = -3287449965373105826L;
032    
033            public HashMapList() {
034                    super();
035            }
036    
037            public HashMapList(Map<? extends K, ? extends V> m) {
038                    super(m);
039            }
040    
041            public synchronized V put(K key, V value) {
042                    return super.put(key, value);
043            }
044    
045            public synchronized int indexOf(V value) {
046                    Iterator<V> it = values().iterator();
047                    for (int i = 0; it.hasNext(); i++) {
048                            if (it.next().equals(value)) {
049                                    return i;
050                            }
051                    }
052                    return -1;
053            }
054    
055            public synchronized V get(int index) {
056                    Iterator<V> it = values().iterator();
057                    for (int i = 0; it.hasNext() && i < index; i++) {
058                            it.next();
059                    }
060                    return it.hasNext() ? it.next() : null;
061            }
062    
063            public synchronized V remove(Object key) {
064                    return super.remove(key);
065            }
066    
067    }