org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators
Class POMapLookUp

java.lang.Object
  extended by org.apache.pig.impl.plan.Operator<PhyPlanVisitor>
      extended by org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator
          extended by org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.ExpressionOperator
              extended by org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POMapLookUp
All Implemented Interfaces:
Serializable, Cloneable, Comparable<Operator>, Illustrable

public class POMapLookUp
extends ExpressionOperator

See Also:
Serialized Form

Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator
PhysicalOperator.OriginalLocation
 
Field Summary
 
Fields inherited from class org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator
alias, dummyBag, dummyBool, dummyDateTime, dummyDBA, dummyDouble, dummyFloat, dummyInt, dummyLong, dummyMap, dummyString, dummyTuple, illustrator, input, inputAttached, inputs, lineageTracer, outputs, parentPlan, pigLogger, reporter, requestedParallelism, res, resultType
 
Fields inherited from class org.apache.pig.impl.plan.Operator
mKey
 
Constructor Summary
POMapLookUp(OperatorKey k)
           
POMapLookUp(OperatorKey k, int rp)
           
POMapLookUp(OperatorKey k, int rp, String key)
           
 
Method Summary
 POMapLookUp clone()
          Make a deep copy of this operator.
 List<ExpressionOperator> getChildExpressions()
          Get the sub-expressions of this expression.
 String getLookUpKey()
           
 Result getNext(Boolean b)
           
 Result getNext(DataBag db)
           
 Result getNext(DataByteArray ba)
           
 Result getNext(org.joda.time.DateTime dt)
           
 Result getNext(Double d)
           
 Result getNext(Float f)
           
 Result getNext(Integer i)
           
 Result getNext(Long l)
           
 Result getNext(Map m)
           
 Result getNext(String s)
           
 Result getNext(Tuple t)
           
 Tuple illustratorMarkup(Object in, Object out, int eqClassIndex)
          input tuple mark up to be illustrate-able
 String name()
           
 Result processInput()
          A generic method for parsing input that either returns the attached input if it exists or fetches it from its predecessor.
 void setLookUpKey(String key)
           
 boolean supportsMultipleInputs()
          Indicates whether this operator supports multiple inputs.
 void visit(PhyPlanVisitor v)
          Visit this node with the provided visitor.
 
Methods inherited from class org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.ExpressionOperator
accumChild, accumChild, accumChild, accumChild, accumChild, accumChild, accumChild, accumChild, accumChild, accumChild, accumChild, accumChild, containUDF, setIllustrator, supportsMultipleOutputs
 
Methods inherited from class org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator
addOriginalLocation, addOriginalLocation, attachInput, cloneHelper, detachInput, getAlias, getAliasString, getDummy, getIllustrator, getInputs, getLogger, getNext, getOriginalLocations, getPigLogger, getRequestedParallelism, getResultType, isAccumStarted, isAccumulative, isBlocking, isInputAttached, reset, setAccumEnd, setAccumStart, setAccumulative, setInputs, setParentPlan, setPigLogger, setReporter, setRequestedParallelism, setResultType
 
Methods inherited from class org.apache.pig.impl.plan.Operator
compareTo, equals, getOperatorKey, getProjectionMap, hashCode, regenerateProjectionMap, rewire, toString, unsetProjectionMap
 
Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait
 

Constructor Detail

POMapLookUp

public POMapLookUp(OperatorKey k)

POMapLookUp

public POMapLookUp(OperatorKey k,
                   int rp)

POMapLookUp

public POMapLookUp(OperatorKey k,
                   int rp,
                   String key)
Method Detail

setLookUpKey

public void setLookUpKey(String key)

getLookUpKey

public String getLookUpKey()

visit

public void visit(PhyPlanVisitor v)
           throws VisitorException
Description copied from class: Operator
Visit this node with the provided visitor. This should only be called by the visitor class itself, never directly.

Specified by:
visit in class ExpressionOperator
Parameters:
v - Visitor to visit with.
Throws:
VisitorException - if the visitor has a problem.

name

public String name()
Specified by:
name in class Operator<PhyPlanVisitor>

supportsMultipleInputs

public boolean supportsMultipleInputs()
Description copied from class: Operator
Indicates whether this operator supports multiple inputs.

Specified by:
supportsMultipleInputs in class Operator<PhyPlanVisitor>
Returns:
true if it does, otherwise false.

processInput

public Result processInput()
                    throws ExecException
Description copied from class: PhysicalOperator
A generic method for parsing input that either returns the attached input if it exists or fetches it from its predecessor. If special processing is required, this method should be overridden.

Overrides:
processInput in class PhysicalOperator
Returns:
The Result object that results from processing the input
Throws:
ExecException

getNext

public Result getNext(Boolean b)
               throws ExecException
Overrides:
getNext in class PhysicalOperator
Throws:
ExecException

getNext

public Result getNext(DataBag db)
               throws ExecException
Overrides:
getNext in class ExpressionOperator
Throws:
ExecException

getNext

public Result getNext(DataByteArray ba)
               throws ExecException
Overrides:
getNext in class PhysicalOperator
Throws:
ExecException

getNext

public Result getNext(Double d)
               throws ExecException
Overrides:
getNext in class PhysicalOperator
Throws:
ExecException

getNext

public Result getNext(Float f)
               throws ExecException
Overrides:
getNext in class PhysicalOperator
Throws:
ExecException

getNext

public Result getNext(Integer i)
               throws ExecException
Overrides:
getNext in class PhysicalOperator
Throws:
ExecException

getNext

public Result getNext(Long l)
               throws ExecException
Overrides:
getNext in class PhysicalOperator
Throws:
ExecException

getNext

public Result getNext(org.joda.time.DateTime dt)
               throws ExecException
Overrides:
getNext in class PhysicalOperator
Throws:
ExecException

getNext

public Result getNext(Map m)
               throws ExecException
Overrides:
getNext in class PhysicalOperator
Throws:
ExecException

getNext

public Result getNext(String s)
               throws ExecException
Overrides:
getNext in class PhysicalOperator
Throws:
ExecException

getNext

public Result getNext(Tuple t)
               throws ExecException
Overrides:
getNext in class PhysicalOperator
Throws:
ExecException

clone

public POMapLookUp clone()
                  throws CloneNotSupportedException
Description copied from class: ExpressionOperator
Make a deep copy of this operator. This is declared here to make it possible to call clone on ExpressionOperators.

Overrides:
clone in class ExpressionOperator
Throws:
CloneNotSupportedException
See Also:
Do not use the clone method directly. Operators are cloned when logical plans are cloned using {@link LogicalPlanCloner}

getChildExpressions

public List<ExpressionOperator> getChildExpressions()
Description copied from class: ExpressionOperator
Get the sub-expressions of this expression. This is called if reducer is run as accumulative mode, all the child expression must be called if they have any UDF to drive the UDF.accumulate()

Specified by:
getChildExpressions in class ExpressionOperator

illustratorMarkup

public Tuple illustratorMarkup(Object in,
                               Object out,
                               int eqClassIndex)
Description copied from interface: Illustrable
input tuple mark up to be illustrate-able

Parameters:
in - input tuple
out - output tuple before wrapped in ExampleTuple
eqClassIndex - index into equivalence classes in illustrator
Returns:
tuple


Copyright © 2007-2012 The Apache Software Foundation