be.SIRAPRISE.typeimplementations
Class PRIORDATE_DATE

java.lang.Object
  be.SIRAPRISE.typeimplementations.PRIORDATE_DATE

All Implemented Interfaces:

OperatorImplementation, OperatorImplementation_V0104

public final class PRIORDATE_DATE
extends java.lang.Object
implements OperatorImplementation_V0104

The PRIORDATE(DATE) operator returns the DATE value that is one day before the argument value. If the argument value is the lowest possible DATE value, then an IllegalArgumentException is thrown.

Author:

Erwin

Constructor Summary

PRIORDATE_DATE()

Method Summary

ValueBuffer	executeOperator(java.util.LinkedList<ValueBuffer> args) The PRIORDATE(DATE) operator returns the DATE value that is one day before the argument value.
java.lang.String[]	getArgumentTypeNames() PRIORDATE takes a single argument of type DATE
java.lang.String	getReturnTypeName() The return type is of type DATE
boolean	isDeterministic() Tells whether the operator is deterministic with respect to the arguments of its invocations.

Methods inherited from class java.lang.Object

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

Constructor Detail

PRIORDATE_DATE

public PRIORDATE_DATE()

Method Detail

executeOperator

public ValueBuffer executeOperator(java.util.LinkedList<ValueBuffer> args)

The PRIORDATE(DATE) operator returns the DATE value that is one day before the argument value. If the argument value is the lowest possible DATE value, then an IllegalArgumentException is thrown.

Specified by:

executeOperator in interface OperatorImplementation

Parameters:

args - the argument list. The list must hold as many ValueBuffer objects as there are arguments to the operator, and each ValueBuffer object holds a value for some argument to the operator. ValueBuffer objects on the list must appear in the same order as the operator argument declarations.

Returns:

A ValueBuffer object holding the result value of the operator execution in internal format.

getArgumentTypeNames

public java.lang.String[] getArgumentTypeNames()

PRIORDATE takes a single argument of type DATE

Specified by:

getArgumentTypeNames in interface OperatorImplementation

Returns:

The names of the argument types

getReturnTypeName

public java.lang.String getReturnTypeName()

The return type is of type DATE

Specified by:

getReturnTypeName in interface OperatorImplementation

Returns:

the name of the type of the return value

isDeterministic

public boolean isDeterministic()

Description copied from interface: OperatorImplementation_V0104

Tells whether the operator is deterministic with respect to the arguments of its invocations. An operator is deterministic if and only if for any two distinct invocations, if all the argument values are the same, then the result value returned will also be the same. An example of a nondeterministic operators is RANDOM().

Specified by:

isDeterministic in interface OperatorImplementation_V0104

Returns:

true if the operator is deterministic.