be.SIRAPRISE.typeimplementations

Class GTCLOSE

java.lang.Object

be.SIRAPRISE.typeimplementations.RelationalOperator

be.SIRAPRISE.typeimplementations.GTCLOSE

All Implemented Interfaces:

OperatorGenerator

@OperatorGeneratorCharacteristics(maximumArgumentCount=3,
                                  minimumArgumentCount=3,
                                  name="GTCLOSE",
                                  signature={EXPRESSION,STRING,STRING})
 @MonoRelationOperator
public abstract class GTCLOSE
extends RelationalOperator

GTCLOSE

Author:

erwin

Constructor Summary

Constructors

Constructor and Description
GTCLOSE()

Method Summary

Modifier and Type	Method and Description
static Relation	computeGTClose(Relation relation, java.util.Map<NameIdentifier,NameIdentifier> matchby, java.util.Map<NameIdentifier,java.lang.String> expressions)
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

GTCLOSE

public GTCLOSE()

Method Detail

computeGTClose

public static Relation computeGTClose(Relation relation,
                                      java.util.Map<NameIdentifier,NameIdentifier> matchby,
                                      java.util.Map<NameIdentifier,java.lang.String> expressions)

Parameters:

relation - The relation to be GTClosed

matchby - The definition of which attribute value pairs make two tuples match for transitive closure

expressions - The computational expressions to evaluate for determining the attribute values in the extra "transitive" tuples included in the result

Returns:

The result from computing the generalized transitive closure of the given relation, using the given match specs, with the given calculation expressions

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