001/* 002 * Sonar, open source software quality management tool. 003 * Copyright (C) 2008-2012 SonarSource 004 * mailto:contact AT sonarsource DOT com 005 * 006 * Sonar is free software; you can redistribute it and/or 007 * modify it under the terms of the GNU Lesser General Public 008 * License as published by the Free Software Foundation; either 009 * version 3 of the License, or (at your option) any later version. 010 * 011 * Sonar is distributed in the hope that it will be useful, 012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 * Lesser General Public License for more details. 015 * 016 * You should have received a copy of the GNU Lesser General Public 017 * License along with Sonar; if not, write to the Free Software 018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02 019 */ 020package org.sonar.duplications.statement.matcher; 021 022import java.util.List; 023 024import org.sonar.duplications.token.Token; 025import org.sonar.duplications.token.TokenQueue; 026 027/** 028 * Delegates consumption to another matcher. 029 */ 030public class OptTokenMatcher extends TokenMatcher { 031 032 private final TokenMatcher matcher; 033 034 public OptTokenMatcher(TokenMatcher matcher) { 035 if (matcher == null) { 036 throw new IllegalArgumentException(); 037 } 038 this.matcher = matcher; 039 } 040 041 /** 042 * @return always true 043 */ 044 @Override 045 public boolean matchToken(TokenQueue tokenQueue, List<Token> matchedTokenList) { 046 matcher.matchToken(tokenQueue, matchedTokenList); 047 return true; 048 } 049 050}