be.SIRAPRISE.server

Class IsSubTypeOperatorImplementation

java.lang.Object

be.SIRAPRISE.server.IsSubTypeOperatorImplementation

All Implemented Interfaces:

OperatorImplementation_V0104

public class IsSubTypeOperatorImplementation
extends java.lang.Object
implements OperatorImplementation_V0104

IsSubTypeOperatorImplementation implements the logic for the IS_SUBTYPE(SUPERTYPE) operator. (e.g. IS_INTEGER(LONG) , to illustrate the point)

Author:

Erwin

Constructor Summary

Constructors

Constructor and Description
IsSubTypeOperatorImplementation(java.lang.String rootTypeName, java.util.LinkedList<be.SIRAPRISE.server.ServerSideConstrainedTypeImplementation> superTypeImplementationsChain) Creates the IsSubTypeOperatorImplementation

Method Summary

Modifier and Type	Method and Description
ValueBuffer	executeOperator(java.util.LinkedList<ValueBuffer> args) Performs the actual logic of the operator.
java.lang.String[]	getArgumentTypeNames() Gets the list of names of types of the needed argument values
java.lang.String	getReturnTypeName() Gets the name of the type of the return value
java.lang.String	getSignature() Gets the name of the operator implemented by this implementation object
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

IsSubTypeOperatorImplementation

public IsSubTypeOperatorImplementation(java.lang.String rootTypeName,
                                       java.util.LinkedList<be.SIRAPRISE.server.ServerSideConstrainedTypeImplementation> superTypeImplementationsChain)

Creates the IsSubTypeOperatorImplementation

Parameters:

rootTypeName - The typename of the argument of this operator (a value of the supertype, of which it is to be tested whether it satisfies the subtype condition)

superTypeImplementationsChain - The chain of implementations from the argument's type to the constrained type that is to be checked

Method Detail

executeOperator

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

Description copied from interface: OperatorImplementation_V0104

Performs the actual logic of the operator.

Specified by:

executeOperator in interface OperatorImplementation_V0104

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. Implementations have the option, but are not required, to do a check the conformance of the argument list (the argument count, notably) to the operator signature.

Returns:

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

getArgumentTypeNames

public java.lang.String[] getArgumentTypeNames()

Description copied from interface: OperatorImplementation_V0104

Gets the list of names of types of the needed argument values

Specified by:

getArgumentTypeNames in interface OperatorImplementation_V0104

Returns:

The names of the argument types

getReturnTypeName

public java.lang.String getReturnTypeName()

Description copied from interface: OperatorImplementation_V0104

Gets the name of the type of the return value

Specified by:

getReturnTypeName in interface OperatorImplementation_V0104

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.

getSignature

public java.lang.String getSignature()

Description copied from interface: OperatorImplementation_V0104

Gets the name of the operator implemented by this implementation object

Specified by:

getSignature in interface OperatorImplementation_V0104

Returns:

the name of the operator implemented by this implementation object