001    /**
002     * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.util;
016    
017    /**
018     * @author     Brian Wing Shun Chan
019     * @deprecated As of 7.0.0, replaced by
020     *             {com.liferay.petra.collection.stack.FiniteStack}
021     */
022    @Deprecated
023    public class FiniteUniqueStack<E> extends FiniteStack<E> {
024    
025            public FiniteUniqueStack(int maxSize) {
026                    super(maxSize);
027            }
028    
029            @Override
030            public E push(E item) {
031                    if (!contains(item)) {
032                            super.push(item);
033                    }
034                    else {
035                            if (!item.equals(peek())) {
036                                    remove(item);
037                                    super.push(item);
038                            }
039                    }
040    
041                    return item;
042            }
043    
044    }