org.globus.ogsa.impl.core.service
Class ServiceDataNameSetEvaluator

java.lang.Object
  org.globus.ogsa.impl.core.service.ServiceDataNameSetEvaluator

All Implemented Interfaces:

ExpressionEvaluator

public class ServiceDataNameSetEvaluator

extends java.lang.Object

implements ExpressionEvaluator

Evaluator supporting service data by name lookups in a service data set

Constructor Summary

ServiceDataNameSetEvaluator()

Method Summary

java.lang.Object	evaluate(ExtensibilityType expression, ServiceDataSet serviceDataSet) Evaluates the expression over a service data set and returns the result.
QName[]	getExpressionNames() Gets the QNames (as defined in the XML Schema of the expression) of top level expression elements that this evaluator can handle.
QName[]	getSDNames(ExtensibilityType expression) The Set of ServiceData names this expression acts on.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ServiceDataNameSetEvaluator

public ServiceDataNameSetEvaluator()

Method Detail

getExpressionNames

public QName[] getExpressionNames()

Description copied from interface: ExpressionEvaluator

Gets the QNames (as defined in the XML Schema of the expression) of top level expression elements that this evaluator can handle.

Specified by:

getExpressionNames in interface ExpressionEvaluator

Returns:

array of qnames supported by this evaluator

evaluate

public java.lang.Object evaluate(ExtensibilityType expression,
                                 ServiceDataSet serviceDataSet)
                          throws FaultType

Description copied from interface: ExpressionEvaluator

Evaluates the expression over a service data set and returns the result.

Specified by:

evaluate in interface ExpressionEvaluator

Parameters:

expression - object passed by client representing query or subscription expression

serviceDataSet - service data set associated with service instance that is to evaluate the expression

Returns:

the result of the evaluation which depends on the expression. The result must be an xml serializable object in order to be passed back correctly to a rempote client. The easiest way of achieving this is to model it as a Bean, or simply return a DOM Element. If the result object returned is null an empty query result is returned or alternatively no notification is sent out.

Throws:

FaultType

getSDNames

public QName[] getSDNames(ExtensibilityType expression)
                   throws FaultType

The Set of ServiceData names this expression acts on.

Specified by:

getSDNames in interface ExpressionEvaluator

Returns:

Set of QNames of the ServiceData.

Throws:

FaultType