001/*
002 * Copyright (c) 2007-2016 Concurrent, Inc. All Rights Reserved.
003 *
004 * Project and contact information: http://www.cascading.org/
005 *
006 * This file is part of the Cascading project.
007 *
008 * Licensed under the Apache License, Version 2.0 (the "License");
009 * you may not use this file except in compliance with the License.
010 * You may obtain a copy of the License at
011 *
012 *     http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing, software
015 * distributed under the License is distributed on an "AS IS" BASIS,
016 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
017 * See the License for the specific language governing permissions and
018 * limitations under the License.
019 */
020
021package cascading.flow.planner;
022
023import cascading.flow.FlowStep;
024import cascading.flow.planner.process.FlowNodeFactory;
025import cascading.flow.planner.process.FlowStepFactory;
026import cascading.tap.Tap;
027import cascading.util.Util;
028
029/**
030 *
031 */
032public abstract class BaseFlowStepFactory<Config> implements FlowStepFactory<Config>
033  {
034  FlowNodeFactory flowNodeFactory;
035
036  protected BaseFlowStepFactory()
037    {
038    }
039
040  public BaseFlowStepFactory( FlowNodeFactory flowNodeFactory )
041    {
042    this.flowNodeFactory = flowNodeFactory;
043    }
044
045  public String makeFlowStepName( FlowStep flowStep, int numSteps, int stepNum )
046    {
047    Tap sink = Util.getFirst( flowStep.getSinkTaps() );
048
049    stepNum++; // number more sensical (5/5)
050
051    if( sink == null || sink.isTemporary() )
052      return String.format( "(%d/%d)", stepNum, numSteps );
053
054    String identifier = sink.getIdentifier();
055
056    if( Util.isEmpty( identifier ) )
057      return String.format( "(%d/%d)", stepNum, numSteps );
058
059    if( identifier.length() > 25 )
060      identifier = String.format( "...%25s", identifier.substring( identifier.length() - 25 ) );
061
062    return String.format( "(%d/%d) %s", stepNum, numSteps, identifier );
063    }
064
065  @Override
066  public FlowNodeFactory getFlowNodeFactory()
067    {
068    return flowNodeFactory;
069    }
070  }