be.SIRAPRISE.typeimplementations
Class PI

java.lang.Object
  be.SIRAPRISE.typeimplementations.PI

All Implemented Interfaces:

OperatorImplementation, OperatorImplementation_V0104

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

The PI operator returns the FLOAT constant 3.1415926535...

Author:

Erwin

Constructor Summary

PI()

Method Summary

ValueBuffer	executeOperator(java.util.LinkedList<ValueBuffer> args) The operator returns the FLOAT constant 3.1415926535...
java.lang.String[]	getArgumentTypeNames() The operator takes no arguments
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

PI

public PI()

Method Detail

executeOperator

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

The operator returns the FLOAT constant 3.1415926535...

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 FLOAT

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 no arguments

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.