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 */ 020 package org.sonar.duplications.statement.matcher; 021 022 import java.util.List; 023 024 import org.sonar.duplications.token.Token; 025 import org.sonar.duplications.token.TokenQueue; 026 027 /** 028 * Consumes everything between pair of tokens. 029 */ 030 public class BridgeTokenMatcher extends TokenMatcher { 031 032 private final String lToken; 033 private final String rToken; 034 035 public BridgeTokenMatcher(String lToken, String rToken) { 036 if (lToken == null || rToken == null) { 037 throw new IllegalArgumentException(); 038 } 039 this.lToken = lToken; 040 this.rToken = rToken; 041 } 042 043 @Override 044 public boolean matchToken(TokenQueue tokenQueue, List<Token> matchedTokenList) { 045 if (!tokenQueue.isNextTokenValue(lToken)) { 046 return false; 047 } 048 int stack = 0; 049 while (tokenQueue.peek() != null) { 050 Token token = tokenQueue.poll(); 051 if (lToken.equals(token.getValue())) { 052 stack++; 053 } else if (rToken.equals(token.getValue())) { 054 stack--; 055 } 056 matchedTokenList.add(token); 057 if (stack == 0) { 058 return true; 059 } 060 } 061 return false; 062 } 063 064 }