sonarqube/sonar-duplications/src/main/java/org/sonar/duplications/statement/StatementChannelDisptacher.java

/*
 * SonarQube
 * Copyright (C) 2009-2019 SonarSource SA
 * mailto:info AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package org.sonar.duplications.statement;

import java.util.List;

import org.sonar.duplications.token.Token;
import org.sonar.duplications.token.TokenQueue;

public class StatementChannelDisptacher {

  private final StatementChannel[] channels;

  public StatementChannelDisptacher(List<StatementChannel> channels) {
    this.channels = channels.toArray(new StatementChannel[channels.size()]);
  }

  public boolean consume(TokenQueue tokenQueue, List<Statement> statements) {
    Token nextToken = tokenQueue.peek();
    while (nextToken != null) {
      boolean channelConsumed = false;
      for (StatementChannel channel : channels) {
        if (channel.consume(tokenQueue, statements)) {
          channelConsumed = true;
          break;
        }
      }
      if (!channelConsumed) {
        throw new IllegalStateException("None of the statement channel has been able to consume token: " + nextToken);
      }
      nextToken = tokenQueue.peek();
    }
    return true;
  }

}