content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.job.workflow.composite;
  
  import alluxio.job.JobConfig;
  import alluxio.job.workflow.WorkflowExecution;
  
  import com.google.common.collect.Sets;
  
  import java.util.ArrayList;
  import java.util.Set;
  
  /**
   * Job execution for {@link CompositeConfig}.
   */
  public class CompositeExecution extends WorkflowExecution {
  
    private final ArrayList<JobConfig> mJobs;
    private final boolean mSequential;
  
    private int mPosition;
  
    /**
     * Default constructor.
     * @param compositeConfig the {@link CompositeConfig}
     */
    public CompositeExecution(CompositeConfig compositeConfig) {
      mJobs = compositeConfig.getJobs();
      mSequential = compositeConfig.isSequential();
  
      mPosition = 0;
    }
  
    @Override
    public String getName() {
      return "Composite";
    }
  
    @Override
    protected Set<JobConfig> nextJobs() {
      if (mPosition >= mJobs.size()) {
        return Sets.newHashSet();
      }
  
      if (mSequential) {
        return Sets.newHashSet(mJobs.get(mPosition++));
      }
  
      mPosition = mJobs.size();
      return Sets.newHashSet(mJobs);
    }
  }
  