Examples of org.apache.pig.impl.plan.PlanWalker.walk()

Class org.apache.pig.impl.plan.PlanWalker

Examples of org.apache.pig.impl.plan.PlanWalker.walk()

org.apache.pig.impl.plan.PlanWalker.walk()
Begin traversing the graph. @param visitor Visitor this walker is being used by. This can't be set inthe constructor because the visitor is constructing this class, and does not yet have a 'this' pointer to send as an argument. @throws VisitorException if an error is encountered while walking.

                    // 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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                    // 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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                    // 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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                    // 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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    protected void visit(LOForEach forEach) throws VisitorException {
        // Visit each of generates projection elements.
        for(LogicalPlan lp: forEach.getForEachPlans()) {
            PlanWalker w = new DependencyOrderWalker(lp);
            pushWalker(w);
            w.walk(this);
            popWalker();
        }
    }


    /**

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    protected void visit(LOSort s) throws VisitorException {
        // Visit the sort function
        for(LogicalPlan lp: s.getSortColPlans()) {
            PlanWalker w = new DependencyOrderWalker(lp);
            pushWalker(w);
            w.walk(this);
            popWalker();
        }
    }


    protected void visit(LOLimit limOp) throws VisitorException {

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     */
    protected void visit(LOFilter filter) throws VisitorException {
        // Visit the condition for the filter followed by the input
        PlanWalker w = new DependencyOrderWalker(filter.getComparisonPlan());
        pushWalker(w);
        w.walk(this);
        popWalker();
    }


    /**
     *

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    protected void visit(LOGenerate g) throws VisitorException {
        // Visit the operators that are part of the foreach plan
        for(LogicalPlan lp: g.getGeneratePlans()) {
            PlanWalker w = new DependencyOrderWalker(lp);
            pushWalker(w);
            w.walk(this);
            popWalker();
        }
    }


    /**

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    protected void visit(LOSplitOutput sop) throws VisitorException {
        LogicalPlan lp = sop.getConditionPlan();
        if (null != lp) {
            PlanWalker w = new DependencyOrderWalker(lp);
            pushWalker(w);
            w.walk(this);
            popWalker();
        }
    }


    protected void visit(LODistinct dt) throws VisitorException {

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                    // 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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