Package org.apache.pig.newplan

Examples of org.apache.pig.newplan.DepthFirstWalker


        plan.connect(joe, bob);
        plan.connect(bob, jill);
        plan.connect(bob, jane);
       
        SillyVisitor v =
            new SillyVisitor(plan, new DepthFirstWalker(plan));
       
        v.visit();
       
        String s = v.getVisitPattern();
       
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        private final Splitter splitter;
        private final Set<String> blacklist;
        private final Set<String> whitelist;

        protected BlackAndWhitelistVisitor(OperatorPlan plan) throws FrontendException {
            super(plan, new DepthFirstWalker(plan));
            blacklist = Sets.newHashSet();
            whitelist = Sets.newHashSet();
            splitter = Splitter.on(',').trimResults().omitEmptyStrings();

            init();
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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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        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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        plan.connect(joe, bob);
        plan.connect(bob, jill);
        plan.connect(bob, jane);

        SillyVisitor v =
                new SillyVisitor(plan, new DepthFirstWalker(plan));

        v.visit();

        String s = v.getVisitPattern();
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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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    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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