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.java;
021
022import java.util.List;
023
024import org.sonar.duplications.statement.matcher.TokenMatcher;
025import org.sonar.duplications.token.Token;
026import org.sonar.duplications.token.TokenQueue;
027
028public class BridgeWithExceptionTokenMatcher extends TokenMatcher {
029
030  private final String lToken;
031  private final String rToken;
032  private final String except;
033
034  public BridgeWithExceptionTokenMatcher(String lToken, String rToken, String except) {
035    if (lToken == null || rToken == null || except == null) {
036      throw new IllegalArgumentException();
037    }
038    this.lToken = lToken;
039    this.rToken = rToken;
040    this.except = except;
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      matchedTokenList.add(token);
052      if (lToken.equals(token.getValue())) {
053        stack++;
054      } else if (rToken.equals(token.getValue())) {
055        stack--;
056      } else if (except.equals(token.getValue())) {
057        return false;
058      }
059      if (stack == 0) {
060        return true;
061      }
062    }
063    return false;
064  }
065
066}