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, illustrator, input, inputAttached, inputs, lineageTracer, outputs, parentPlan, pigLogger, 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 getNextBoolean()
           
 Result getNextDataBag()
           
 Result getNextDataByteArray()
           
 Result getNextDateTime()
           
 Result getNextDouble()
           
 Result getNextFloat()
           
 Result getNextInteger()
           
 Result getNextLong()
           
 Result getNextMap()
           
 Result getNextString()
           
 Result getNextTuple()
           
 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, containUDF, setIllustrator, supportsMultipleOutputs, toString
 
Methods inherited from class org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator
addOriginalLocation, addOriginalLocation, attachInput, cloneHelper, detachInput, getAlias, getAliasString, getIllustrator, getInputs, getLogger, getNext, getNextBigDecimal, getNextBigInteger, getOriginalLocations, getPigLogger, getReporter, 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, 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

getNextBoolean

public Result getNextBoolean()
                      throws ExecException
Overrides:
getNextBoolean in class PhysicalOperator
Throws:
ExecException

getNextDataBag

public Result getNextDataBag()
                      throws ExecException
Overrides:
getNextDataBag in class ExpressionOperator
Throws:
ExecException

getNextDataByteArray

public Result getNextDataByteArray()
                            throws ExecException
Overrides:
getNextDataByteArray in class PhysicalOperator
Throws:
ExecException

getNextDouble

public Result getNextDouble()
                     throws ExecException
Overrides:
getNextDouble in class PhysicalOperator
Throws:
ExecException

getNextFloat

public Result getNextFloat()
                    throws ExecException
Overrides:
getNextFloat in class PhysicalOperator
Throws:
ExecException

getNextInteger

public Result getNextInteger()
                      throws ExecException
Overrides:
getNextInteger in class PhysicalOperator
Throws:
ExecException

getNextLong

public Result getNextLong()
                   throws ExecException
Overrides:
getNextLong in class PhysicalOperator
Throws:
ExecException

getNextDateTime

public Result getNextDateTime()
                       throws ExecException
Overrides:
getNextDateTime in class PhysicalOperator
Throws:
ExecException

getNextMap

public Result getNextMap()
                  throws ExecException
Overrides:
getNextMap in class PhysicalOperator
Throws:
ExecException

getNextString

public Result getNextString()
                     throws ExecException
Overrides:
getNextString in class PhysicalOperator
Throws:
ExecException

getNextTuple

public Result getNextTuple()
                    throws ExecException
Overrides:
getNextTuple 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


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