001/*
002 * Copyright (c) 2007-2015 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.rule.transformer;
022
023import cascading.flow.planner.iso.expression.ElementCapture;
024import cascading.flow.planner.iso.transformer.InsertionGraphTransformer;
025import cascading.flow.planner.rule.PlanPhase;
026import cascading.flow.planner.rule.RuleExpression;
027import cascading.flow.planner.rule.RuleTransformer;
028
029/**
030 *
031 */
032public class RuleInsertionTransformer extends RuleTransformer
033  {
034  public RuleInsertionTransformer( PlanPhase phase, RuleExpression ruleExpression, String factoryName )
035    {
036    this( phase, ruleExpression, null, factoryName );
037    }
038
039  public RuleInsertionTransformer( PlanPhase phase, RuleExpression ruleExpression, String factoryName, InsertionGraphTransformer.Insertion insertAfter )
040    {
041    this( phase, ruleExpression, null, factoryName, insertAfter );
042    }
043
044  public RuleInsertionTransformer( PlanPhase phase, RuleExpression ruleExpression, ElementCapture capture, String factoryName )
045    {
046    this( phase, ruleExpression, capture, factoryName, InsertionGraphTransformer.Insertion.After );
047    }
048
049  public RuleInsertionTransformer( PlanPhase phase, RuleExpression ruleExpression, ElementCapture capture, String factoryName, InsertionGraphTransformer.Insertion insertion )
050    {
051    super( phase, ruleExpression );
052
053    if( subGraphTransformer != null )
054      graphTransformer = new InsertionGraphTransformer( subGraphTransformer, ruleExpression.getMatchExpression(), capture, factoryName, insertion );
055    else if( contractedTransformer != null )
056      graphTransformer = new InsertionGraphTransformer( contractedTransformer, ruleExpression.getMatchExpression(), capture, factoryName, insertion );
057    else
058      graphTransformer = new InsertionGraphTransformer( ruleExpression.getMatchExpression(), capture, factoryName, insertion );
059    }
060  }