org.apache.pig.impl.logicalLayer
Class LOUserFunc

java.lang.Object
  org.apache.pig.impl.plan.Operator<LOVisitor>
      org.apache.pig.impl.logicalLayer.LogicalOperator
          org.apache.pig.impl.logicalLayer.ExpressionOperator
              org.apache.pig.impl.logicalLayer.LOUserFunc

All Implemented Interfaces:

Serializable, Cloneable, Comparable<Operator>

public class LOUserFunc
extends ExpressionOperator

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.pig.impl.logicalLayer.ExpressionOperator

mFieldSchema, mIsFieldSchemaComputed

Fields inherited from class org.apache.pig.impl.logicalLayer.LogicalOperator

mAlias, mIsProjectionMapComputed, mIsSchemaComputed, mPinnedOptions, mPlan, mProjectionMap, mRequestedParallelism, mSchema, mType

Fields inherited from class org.apache.pig.impl.plan.Operator

mKey

Constructor Summary

LOUserFunc(LogicalPlan plan, OperatorKey k, FuncSpec funcSpec, byte returnType)

Method Summary

protected Object	clone()
List<ExpressionOperator>	getArguments()
Schema.FieldSchema	getFieldSchema()
FuncSpec	getFuncSpec()
Schema	getSchema() Get a copy of the schema for the output of this operator.
String	name()
void	setFuncSpec(FuncSpec funcSpec)
boolean	supportsMultipleInputs() Indicates whether this operator supports multiple inputs.
void	visit(LOVisitor v) Visit this node with the provided visitor.

Methods inherited from class org.apache.pig.impl.logicalLayer.ExpressionOperator

getType, regenerateFieldSchema, setFieldSchema, supportsMultipleOutputs, unsetFieldSchema

Methods inherited from class org.apache.pig.impl.logicalLayer.LogicalOperator

forceSchema, getAlias, getOperatorKey, getPlan, getRequestedParallelism, isPinnedOption, pinOption, reconcileSchema, regenerateSchema, setAlias, setCanonicalNames, setPlan, setRequestedParallelism, setSchema, setSchemaComputed, setType, toString, unsetSchema

Methods inherited from class org.apache.pig.impl.plan.Operator

compareTo, equals, getProjectionMap, hashCode, regenerateProjectionMap, rewire, unsetProjectionMap

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

LOUserFunc

public LOUserFunc(LogicalPlan plan,
                  OperatorKey k,
                  FuncSpec funcSpec,
                  byte returnType)

Parameters:

plan - LogicalPlan this operator is a part of.

k - OperatorKey for this operator.

funcSpec - name of the user defined function.

returnType - return type of this function.

Method Detail

getFuncSpec

public FuncSpec getFuncSpec()

getArguments

public List<ExpressionOperator> getArguments()

supportsMultipleInputs

public boolean supportsMultipleInputs()

Description copied from class: Operator

Indicates whether this operator supports multiple inputs.

Specified by:

supportsMultipleInputs in class Operator<LOVisitor>

Returns:

true if it does, otherwise false.

name

public String name()

Specified by:

name in class Operator<LOVisitor>

getSchema

public Schema getSchema()

Description copied from class: LogicalOperator

Get a copy of the schema for the output of this operator.

Overrides:

getSchema in class ExpressionOperator

getFieldSchema

public Schema.FieldSchema getFieldSchema()
                                  throws FrontendException

Overrides:

getFieldSchema in class ExpressionOperator

Throws:

FrontendException

visit

public void visit(LOVisitor v)
           throws VisitorException

Description copied from class: LogicalOperator

Visit this node with the provided visitor. This should only be called by the visitor class itself, never directly.

Specified by:

visit in class LogicalOperator

Parameters:

v - Visitor to visit with.

Throws:

VisitorException - if the visitor has a problem.

setFuncSpec

public void setFuncSpec(FuncSpec funcSpec)

Parameters:

funcSpec - the FuncSpec to set

clone

protected Object clone()
                throws CloneNotSupportedException

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}