How to use

cascading.flow.planner.iso.finder.GraphFinder

constructor

public GraphAssert( ExpressionGraph expressionGraph, String message, AssertionType assertionType )
 {
 this.finder = new GraphFinder( expressionGraph );
 this.message = message;
 if( assertionType != null )
  this.assertionType = assertionType;
 }

public SubGraphTransformer( GraphTransformer graphTransformer, ExpressionGraph subGraphMatcher )
 {
 this.graphTransformer = graphTransformer;
 this.subGraphMatcher = subGraphMatcher;
 this.subGraphFinder = new GraphFinder( subGraphMatcher );
 this.findAllPrimaries = subGraphMatcher.supportsNonRecursiveMatch();
 }

protected RecursiveGraphTransformer( ExpressionGraph expressionGraph )
 {
 this.expressionGraph = expressionGraph;
 this.finder = new GraphFinder( expressionGraph );
 this.findAllPrimaries = expressionGraph.supportsNonRecursiveMatch();
 }

public ExpressionSubGraphIterator( PlannerContext plannerContext, ExpressionGraph contractionExpression, ExpressionGraph matchExpression, boolean firstOnly, ElementGraph elementGraph, Collection<FlowElement> elementExcludes )
 {
 this.plannerContext = plannerContext;
 this.firstOnly = firstOnly;
 this.elementGraph = elementGraph;
 if( elementExcludes != null )
  this.elementExcludes.addAll( elementExcludes );
 if( contractionExpression != null )
  contractedTransformer = new ContractedTransformer( contractionExpression );
 else
  contractedGraph = elementGraph;
 graphFinder = new GraphFinder( matchExpression );
 }

@Test
public void testFind2()
 {
 ElementGraph graph = new HashJoinSameSourceGraph();
 graph = new ContractedTransformer( new SyncPipeExpressionGraph() ).transform( graph ).getEndGraph();
 FlowElementExpression sharedTap = new FlowElementExpression( Tap.class, TypeExpression.Topo.SplitOnly );
 FlowElementExpression sharedHashJoin = new FlowElementExpression( HashJoin.class );
 ExpressionGraph expressionGraph = new ExpressionGraph()
  .arc( sharedTap, ScopeExpression.ALL, sharedHashJoin );
 GraphFinder graphFinder = new GraphFinder( expressionGraph );
 Match match = graphFinder.findFirstMatch( graph );
 match.getMatchedGraph().writeDOT( getPlanPath() + "/match.dot" );
 }

@Test
public void testFind()
 {
 ElementGraph graph = new HashJoinSameSourceGraph();
 graph = new ContractedTransformer( new SyncPipeExpressionGraph() ).transform( graph ).getEndGraph();
 FlowElementExpression SHARED_TAP = new FlowElementExpression( Tap.class, TypeExpression.Topo.SplitOnly );
 FlowElementExpression SHARED_HASHJOIN = new FlowElementExpression( HashJoin.class );
 ExpressionGraph expressionGraph = new ExpressionGraph()
  .arcs( SHARED_TAP, SHARED_HASHJOIN )
  .arcs( SHARED_TAP, SHARED_HASHJOIN );
 GraphFinder graphFinder = new GraphFinder( expressionGraph );
 Match match = graphFinder.findFirstMatch( graph );
 match.getMatchedGraph().writeDOT( getPlanPath() + "/match.dot" );
 }

 @Test
 public void testFindAllMatched()
  {
//    ElementGraph graph = new HashJoinSameSourceGraph();
  ElementGraph graph = new JoinAroundJoinRightMostGraph();
  graph.writeDOT( getPlanPath() + "/full.dot" );

//    graph = new ContractedTransform( new SyncPipeExpressionGraph() ).transform( graph ).getEndGraph();
  graph = new ContractedTransformer( new NoGroupTapExpressionGraph() ).transform( graph ).getEndGraph();

  graph.writeDOT( getPlanPath() + "/contracted.dot" );

  ExpressionGraph expressionGraph = new ExpressionGraph( new FlowElementExpression( ElementCapture.Primary, Tap.class ) );

  GraphFinder graphFinder = new GraphFinder( expressionGraph );

  Match match = graphFinder.findAllMatches( graph );

  match.getMatchedGraph().writeDOT( getPlanPath() + "/match.dot" );
  }
 }

 @Test
 public void testFindAllOnPrimary()
  {
//    ElementGraph graph = new HashJoinSameSourceGraph();
  ElementGraph graph = new JoinAroundJoinRightMostGraph();
  graph.writeDOT( getPlanPath() + "/full.dot" );

//    graph = new ContractedTransform( new SyncPipeExpressionGraph() ).transform( graph ).getEndGraph();
  graph = new ContractedTransformer( new NoGroupTapExpressionGraph() ).transform( graph ).getEndGraph();

  graph.writeDOT( getPlanPath() + "/contracted.dot" );

  ExpressionGraph expressionGraph = new ExpressionGraph()
   .arc(
    new FlowElementExpression( Tap.class ),
    ScopeExpression.ALL,
    new FlowElementExpression( ElementCapture.Primary, HashJoin.class )
   );

  GraphFinder graphFinder = new GraphFinder( expressionGraph );

  Match match = graphFinder.findAllMatchesOnPrimary( graph );

  match.getMatchedGraph().writeDOT( getPlanPath() + "/match.dot" );
  }