/*
* Copyright (c) 2007-2014 Concurrent, Inc. All Rights Reserved.
*
* Project and contact information: http://www.cascading.org/
*
* This file is part of the Cascading project.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cascading.flow.tez.planner.rule.expressiongraph;
import cascading.flow.planner.iso.expression.ElementCapture;
import cascading.flow.planner.iso.expression.ExpressionGraph;
import cascading.flow.planner.iso.expression.FlowElementExpression;
import cascading.flow.planner.iso.expression.PathScopeExpression;
import cascading.flow.planner.iso.expression.TypeExpression;
import cascading.flow.planner.iso.finder.SearchOrder;
import cascading.flow.planner.rule.elementexpression.BoundariesElementExpression;
import cascading.pipe.Boundary;
import cascading.pipe.Group;
import cascading.pipe.Merge;
import cascading.tap.Tap;
import static cascading.flow.planner.iso.expression.OrElementExpression.or;
/**
*
*/
public class BottomUpNoSplitConsecutiveBoundariesExpressionGraph extends ExpressionGraph
{
public BottomUpNoSplitConsecutiveBoundariesExpressionGraph()
{
super( SearchOrder.ReverseTopological );
this.arc(
or(
new FlowElementExpression( Boundary.class, TypeExpression.Topo.LinearOut ), // not possible to split on a boundary in Tez currently
new FlowElementExpression( Tap.class, TypeExpression.Topo.LinearOut ),
new FlowElementExpression( Group.class, TypeExpression.Topo.LinearOut ), new FlowElementExpression( Merge.class, TypeExpression.Topo.LinearOut )
),
PathScopeExpression.ANY,
new BoundariesElementExpression( ElementCapture.Primary )
);
}
}