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    
021    package org.sonar.duplications.statement;
022    
023    import java.util.List;
024    
025    import org.sonar.duplications.token.Token;
026    import org.sonar.duplications.token.TokenQueue;
027    
028    public class StatementChannelDisptacher {
029    
030      private final StatementChannel[] channels;
031    
032      public StatementChannelDisptacher(List<StatementChannel> channels) {
033        this.channels = channels.toArray(new StatementChannel[channels.size()]);
034      }
035    
036      public boolean consume(TokenQueue tokenQueue, List<Statement> statements) {
037        Token nextToken = tokenQueue.peek();
038        while (nextToken != null) {
039          boolean channelConsumed = false;
040          for (StatementChannel channel : channels) {
041            if (channel.consume(tokenQueue, statements)) {
042              channelConsumed = true;
043              break;
044            }
045          }
046          if (!channelConsumed) {
047            throw new IllegalStateException("None of the statement channel has been able to consume token: " + nextToken);
048          }
049          nextToken = tokenQueue.peek();
050        }
051        return true;
052      }
053    
054    }