/*
 * Copyright (c) 2007-2010 Concurrent, Inc. All Rights Reserved.
 *
 * Project and contact information: http://www.cascading.org/
 *
 * This file is part of the Cascading project.
 *
 * Cascading is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Cascading 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Cascading.  If not, see <http://www.gnu.org/licenses/>.
 */

package cascading.stats;

import java.util.Collection;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;

import cascading.cascade.Cascade;

/** Class CascadeStats collects {@link Cascade} specific statistics. */
public class CascadeStats extends CascadingStats
  {
  /** Field cascadeId */
  String cascadeID;
  /** Field flowStatsList */
  List<FlowStats> flowStatsList = new LinkedList<FlowStats>(); // maintain order

  public CascadeStats( String name, String cascadeID )
    {
    super( name );
    this.cascadeID = cascadeID;
    }

  @Override
  public Object getID()
    {
    return cascadeID;
    }

  /**
   * Method addFlowStats add a child {@link cascading.flow.Flow} {2link FlowStats} instance.
   *
   * @param flowStats of type FlowStats
   */
  public void addFlowStats( FlowStats flowStats )
    {
    flowStatsList.add( flowStats );
    }

  /**
   * Method getFlowCount returns the number of {@link cascading.flow.Flow}s executed by the Cascade.
   *
   * @return the flowCount (type int) of this CascadeStats object.
   */
  public int getFlowCount()
    {
    return flowStatsList.size();
    }

  @Override
  public Collection<String> getCounterGroups()
    {
    Set<String> results = new HashSet<String>();

    for( FlowStats flowStats : flowStatsList )
      results.addAll( flowStats.getCounterGroups() );

    return results;
    }

  @Override
  public Collection<String> getCounterGroupsMatching( String regex )
    {
    Set<String> results = new HashSet<String>();

    for( FlowStats flowStats : flowStatsList )
      results.addAll( flowStats.getCounterGroupsMatching( regex ) );

    return results;
    }

  @Override
  public Collection<String> getCountersFor( String group )
    {
    Set<String> results = new HashSet<String>();

    for( FlowStats flowStats : flowStatsList )
      results.addAll( flowStats.getCountersFor( group ) );

    return results;
    }

  @Override
  public long getCounterValue( Enum counter )
    {
    long value = 0;

    for( FlowStats flowStats : flowStatsList )
      value += flowStats.getCounterValue( counter );

    return value;
    }

  @Override
  public long getCounterValue( String group, String counter )
    {
    long value = 0;

    for( FlowStats flowStats : flowStatsList )
      value += flowStats.getCounterValue( group, counter );

    return value;
    }

  @Override
  public void captureDetail()
    {
    for( FlowStats flowStats : flowStatsList )
      flowStats.captureDetail();
    }

  @Override
  public Collection getChildren()
    {
    return flowStatsList;
    }

  @Override
  public String toString()
    {
    return "Cascade{" + "flowStatsList=" + flowStatsList + '}';
    }
  }