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 }