Package org.apache.pig.newplan

Examples of org.apache.pig.newplan.DepthFirstWalker


   
    class InputOutputFileVisitor extends LogicalRelationalNodesVisitor {

        protected InputOutputFileVisitor(OperatorPlan plan)
                throws FrontendException {
            super(plan, new DepthFirstWalker(plan));
        }
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    }
   
    private static class ProjectionRewriter extends LogicalExpressionVisitor {

        ProjectionRewriter(OperatorPlan p, LogicalRelationalOperator cop) throws FrontendException {
            super(p, new DepthFirstWalker(p));
        }
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  public PColFilterExtractor(OperatorPlan plan,
      List<String> partitionCols) {
    // though we configure a DepthFirstWalker to be the walker, we will not
    // use it - we will visit the leaf and it will recursively walk the
    // plan
    super( plan, new DepthFirstWalker( plan ) );
    this.partitionCols = new ArrayList<String>(partitionCols);
  }
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    private static class SillySameVisitor extends AllSameRalationalNodesVisitor {
        StringBuffer buf = new StringBuffer();

        SillySameVisitor(OperatorPlan plan) throws FrontendException {
            super(plan, new DepthFirstWalker(plan));
        }
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    private static class SillyExpressionVisitor extends LogicalExpressionVisitor {
        StringBuffer buf;

        protected SillyExpressionVisitor(OperatorPlan p, StringBuffer b) throws FrontendException {
            super(p, new DepthFirstWalker(p));
            buf = b;
        }
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    private static class SillyAllExpressionVisitor extends AllExpressionVisitor {
        StringBuffer buf = new StringBuffer();

        public SillyAllExpressionVisitor(OperatorPlan plan) throws FrontendException {
            super(plan, new DepthFirstWalker(plan));
        }
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    private static class TestLogicalVisitor extends LogicalRelationalNodesVisitor {
       
        StringBuffer bf = new StringBuffer();

        protected TestLogicalVisitor(OperatorPlan plan) throws FrontendException {
            super(plan, new DepthFirstWalker(plan));
        }
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    private static class TestExpressionVisitor extends LogicalExpressionVisitor {
       
        StringBuffer bf = new StringBuffer();

        protected TestExpressionVisitor(OperatorPlan plan) throws FrontendException {
            super(plan, new DepthFirstWalker(plan));
        }
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        plan.connect(fred, joe);
        plan.connect(joe, bob);
       
        SillyVisitor v =
            new SillyVisitor(plan, new DepthFirstWalker(plan));
       
        v.visit();
       
        String s = v.getVisitPattern();
       
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        plan.connect(fred, joe);
        plan.connect(joe, jill);
        plan.connect(joe, jane);
       
        SillyVisitor v =
            new SillyVisitor(plan, new DepthFirstWalker(plan));
       
        v.visit();
       
        String s = v.getVisitPattern();
       
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