be.SIRAPRISE.typeimplementations
Class MIN_LONG_LONG

java.lang.Object
  be.SIRAPRISE.typeimplementations.MIN_LONG_LONG

All Implemented Interfaces:

AggregationOperatorImplementation, OperatorImplementation, OperatorImplementation_V0104

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

The implementation for the LONG 'minimumof' operator.

Author:

Erwin

Constructor Summary

MIN_LONG_LONG()

Method Summary

ValueBuffer	executeOperator(java.util.LinkedList<ValueBuffer> args) MIN returns the lowest of the two given argument values
java.lang.String[]	getArgumentTypeNames() MIN takes two arguments, both of type LONG
ScalarValueBuffer	getIdentityElement() The identity value is the highest possible LONG value, 263-1
java.lang.String	getReturnTypeName() The return type is LONG
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

MIN_LONG_LONG

public MIN_LONG_LONG()

Method Detail

executeOperator

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

MIN returns the lowest of the two given argument values

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()

MIN takes two arguments, both of type LONG

Specified by:

getArgumentTypeNames in interface OperatorImplementation

Returns:

The names of the argument types

getIdentityElement

public ScalarValueBuffer getIdentityElement()

The identity value is the highest possible LONG value, 2⁶³-1

Specified by:

getIdentityElement in interface AggregationOperatorImplementation

Returns:

The identity element.

getReturnTypeName

public java.lang.String getReturnTypeName()

The return type is LONG

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.