be.SIRAPRISE.typeimplementations
Class CONCAT_STRING_STRING

java.lang.Object
  be.SIRAPRISE.typeimplementations.CONCAT_STRING_STRING

All Implemented Interfaces:

OperatorImplementation, OperatorImplementation_V0104

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

CONCAT returns the result of appending the second STRING argument to the first.

Author:

Erwin

Constructor Summary

CONCAT_STRING_STRING()

Method Summary

ValueBuffer	executeOperator(java.util.LinkedList<ValueBuffer> args) CONCAT returns the result of appending the second STRING argument to the first.
java.lang.String[]	getArgumentTypeNames() CONCAT takes two arguments, both of type STRING
java.lang.String	getReturnTypeName() CONCAT returns a STRING
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

CONCAT_STRING_STRING

public CONCAT_STRING_STRING()

Method Detail

executeOperator

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

CONCAT returns the result of appending the second STRING argument to the first.

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()

CONCAT takes two arguments, both of type STRING

Specified by:

getArgumentTypeNames in interface OperatorImplementation

Returns:

The names of the argument types

getReturnTypeName

public java.lang.String getReturnTypeName()

CONCAT returns a STRING

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.