be.SIRAPRISE.typeimplementations
Class PLUS_FLOAT_FLOAT

java.lang.Object
  be.SIRAPRISE.typeimplementations.PLUS_FLOAT_FLOAT

All Implemented Interfaces:

AggregationOperatorImplementation, OperatorImplementation, OperatorImplementation_V0104

public final class PLUS_FLOAT_FLOAT
extends java.lang.Object
implements AggregationOperatorImplementation

The FLOAT addition operator.

Author:

Erwin

Constructor Summary

PLUS_FLOAT_FLOAT()

Method Summary

ValueBuffer	executeOperator(java.util.LinkedList<ValueBuffer> args) PLUS returns the sum of the two given arguments.
java.lang.String[]	getArgumentTypeNames() PLUS takes two arguments, each of type FLOAT
ScalarValueBuffer	getIdentityElement() The identity value for PLUS is FLOAT(0.0)
java.lang.String	getReturnTypeName() The return type is FLOAT
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

PLUS_FLOAT_FLOAT

public PLUS_FLOAT_FLOAT()

Method Detail

executeOperator

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

PLUS returns the sum of the two given arguments.

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()

PLUS takes two arguments, each of type FLOAT

Specified by:

getArgumentTypeNames in interface OperatorImplementation

Returns:

The names of the argument types

getIdentityElement

public ScalarValueBuffer getIdentityElement()

The identity value for PLUS is FLOAT(0.0)

Specified by:

getIdentityElement in interface AggregationOperatorImplementation

Returns:

The identity element.

getReturnTypeName

public java.lang.String getReturnTypeName()

The return type is FLOAT

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.