Examples of DependencyOrderWalker

org.apache.pig.experimental.plan.DependencyOrderWalker
A walker to walk graphs in dependency order. It is guaranteed that a node will not be visited until all of its predecessors have been visited. This is equivalent to doing a topilogical sort on the graph and then visiting the nodes in order.
org.apache.pig.impl.plan.DependencyOrderWalker
DependencyOrderWalker traverses the graph in such a way that no node is visited before all the nodes it depends on have been visited. Beyond this, it does not guarantee any particular order. So, you have a graph with node 1 2 3 4, and edges 1->3, 2->3, and 3->4, this walker guarnatees that 1 and 2 will be visited before 3 and 3 before 4, but it does not guarantee whether 1 or 2 will be visited first.
org.apache.pig.newplan.DependencyOrderWalker
A walker to walk graphs in dependency order. It is guaranteed that a node will not be visited until all of its predecessors have been visited. This is equivalent to doing a topilogical sort on the graph and then visiting the nodes in order.

Examples of org.apache.pig.experimental.plan.DependencyOrderWalker

        
        plan.connect(fred, joe);
        plan.connect(joe, bob);
        
        SillyVisitor v =
            new SillyVisitor(plan, new DependencyOrderWalker(plan));
        
        v.visit();
        
        String s = v.getVisitPattern();

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Examples of org.apache.pig.experimental.plan.DependencyOrderWalker

        plan.connect(joe, bob);
        plan.connect(bob, jill);
        plan.connect(jane, jill);
        
        SillyVisitor v =
            new SillyVisitor(plan, new DependencyOrderWalker(plan));
        
        v.visit();
        
        String s = v.getVisitPattern();

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Examples of org.apache.pig.experimental.plan.DependencyOrderWalker

        plan.connect(joe, bob);
        plan.connect(bob, jill);
        plan.connect(bob, jane);
        
        SillyVisitor v =
            new SillyVisitor(plan, new DependencyOrderWalker(plan));
        
        v.visit();
        
        String s = v.getVisitPattern();

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Examples of org.apache.pig.experimental.plan.DependencyOrderWalker

    }
    
    private static class ProjectionFinder extends AllExpressionVisitor {


        public ProjectionFinder(OperatorPlan plan) {
            super(plan, new DependencyOrderWalker(plan));
        }

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Examples of org.apache.pig.experimental.plan.DependencyOrderWalker


    // This value points to the current LogicalRelationalOperator we are working on
    protected LogicalRelationalOperator currentOp;
    
    public ExpToPhyTranslationVisitor(OperatorPlan plan, LogicalRelationalOperator op, PhysicalPlan phyPlan, Map<Operator, PhysicalOperator> map) {
        super(plan, new DependencyOrderWalker(plan));
        currentOp = op;
        logToPhyMap = map;
        currentPlan = phyPlan;
        currentPlans = new Stack<PhysicalPlan>();
    }

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Examples of org.apache.pig.experimental.plan.DependencyOrderWalker


    /**
     * @param plan LogicalPlan that this stamper will act on.
     */
    public UidStamper(OperatorPlan plan) {
        super(plan, new DependencyOrderWalker(plan));
    }

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Examples of org.apache.pig.experimental.plan.DependencyOrderWalker

        static class MapExprMarker extends LogicalExpressionVisitor {


            Map<Long,Set<String>> inputUids = null;
            
            protected MapExprMarker(OperatorPlan p) {
                super(p, new DependencyOrderWalker(p));
                inputUids = new HashMap<Long,Set<String>>();
            }

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Examples of org.apache.pig.experimental.plan.DependencyOrderWalker

    }
    
    private static class SchemaVisitor extends AllSameVisitor {


        public SchemaVisitor(OperatorPlan plan) {
            super(plan, new DependencyOrderWalker(plan));
        }

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Examples of org.apache.pig.experimental.plan.DependencyOrderWalker

import org.apache.pig.impl.util.MultiMap;


public class LogToPhyTranslationVisitor extends LogicalPlanVisitor {
    
    public LogToPhyTranslationVisitor(OperatorPlan plan) {
        super(plan, new DependencyOrderWalker(plan));
        currentPlan = new PhysicalPlan();
        logToPhyMap = new HashMap<Operator, PhysicalOperator>();
        currentPlans = new Stack<PhysicalPlan>();
    }

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Examples of org.apache.pig.impl.plan.DependencyOrderWalker

            for(LogicalPlan lp: mapJoinPlans.get(op)) {
                if (null != lp) {
                    // TODO FIX - How do we know this should be a
                    // DependencyOrderWalker?  We should be replicating the
                    // walker the current visitor is using.
                    PlanWalker w = new DependencyOrderWalker(lp);
                    pushWalker(w);
                    w.walk(this);
                    popWalker();
                }
            }
        }
    }

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