    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.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 insertion )
    040    {
    041    this( phase, ruleExpression, null, factoryName, insertion );
    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  }