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 }