be.SIRAPRISE.typeimplementations
Class ABS_INT

java.lang.Object
  be.SIRAPRISE.typeimplementations.ABS_INT

All Implemented Interfaces:

OperatorImplementation, OperatorImplementation_V0104

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

The INT absolute value operator takes a single argument of type INT, and returns its absolute value.

Author:

Erwin

Constructor Summary

ABS_INT()

Method Summary

ValueBuffer	executeOperator(java.util.LinkedList<ValueBuffer> args) The operator returns the absolute value of its argument.
java.lang.String[]	getArgumentTypeNames() The operator takes a single argument of type INT
java.lang.String	getReturnTypeName() The return type is INT
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

ABS_INT

public ABS_INT()

Method Detail

executeOperator

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

The operator returns the absolute value of its argument. An exception is raised if the argument is equal to FIRSTINT().

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.

getReturnTypeName

public java.lang.String getReturnTypeName()

The return type is INT

Specified by:

getReturnTypeName in interface OperatorImplementation

Returns:

the name of the type of the return value

getArgumentTypeNames

public java.lang.String[] getArgumentTypeNames()

The operator takes a single argument of type INT

Specified by:

getArgumentTypeNames in interface OperatorImplementation

Returns:

The names of the argument types

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.