be.SIRAPRISE.typeimplementations

Class RENAME

java.lang.Object

be.SIRAPRISE.typeimplementations.RelationalOperator

be.SIRAPRISE.typeimplementations.RENAME

All Implemented Interfaces:

OperatorGenerator

@OperatorGeneratorCharacteristics(maximumArgumentCount=2,
                                  minimumArgumentCount=2,
                                  name="RENAME",
                                  signature={EXPRESSION,STRING})
 @MonoRelationOperator
public abstract class RENAME
extends RelationalOperator

Author:

erwin

Constructor Summary

Constructors

Constructor and Description
RENAME()

Method Summary

Modifier and Type	Method and Description
static Relation	computeRename(Relation relation, java.util.Map<NameIdentifier,NameIdentifier> renames)
OperatorImplementation_V0105	getOperatorImplementation(OperatorGeneratorArgument[] args) Gets an implementation instance of the operator.

Methods inherited from class be.SIRAPRISE.typeimplementations.RelationalOperator

getInvocationName, getMaximumArgumentCount, getMinimumArgumentCount, getName, getOperatorGeneratorSignature, isMonoRelationOperator, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

RENAME

public RENAME()

Method Detail

computeRename

public static Relation computeRename(Relation relation,
                                     java.util.Map<NameIdentifier,NameIdentifier> renames)
                              throws EvaluationException

Parameters:

relation - the relation to be subjected to a rename operation

renames - the set of rename entries to be applied

Returns:

The result from applying the specified renames to the input relation given

Throws:

EvaluationException - If the evaluation failed for any reason. See the contained getCause() exception for more detail.

getOperatorImplementation

public final OperatorImplementation_V0105 getOperatorImplementation(OperatorGeneratorArgument[] args)

Description copied from interface: OperatorGenerator

Gets an implementation instance of the operator.

Parameters:

args - The arguments from which the instance is to be created. There must be exactly as many arguments as there are elements in the list returned from OperatorGenerator.getOperatorGeneratorSignature(). The correspondence between OperatorGeneratorArgumentType values and OperatorGeneratorArgument types is given in the table below :

correspondence between OperatorGeneratorArgumentType values and OperatorGeneratorArgument types

OperatorGeneratorArgumentType value	OperatorGeneratorArgument type
EXPRESSION	NonScalarOperatorGeneratorExpressionArgument
EXPRESSIONWITHSCOPE	NonScalarOperatorGeneratorExpressionArgument
STRING	NonScalarOperatorGeneratorTextArgument

Returns:

an instance of the operator