uk.org.ogsadai.activity
Interface ActivityFactory

All Known Implementing Classes:

ActivityFactoryImpl

public interface ActivityFactory

An ActivityFactory is responsible for constructing the activities described in perform documents. An ActivityEngine is configured using an ActivityFactory.

Author:

The OGSA-DAI Project Team

Method Summary

Activity[]	createActivities(org.w3c.dom.Document document) Constructs the activity implementations for each of the activity elements contained in the given perform document.
Property[]	getProperties() Gets a array of Property objects associated with the activity list.

Method Detail

createActivities

public Activity[] createActivities(org.w3c.dom.Document document)
                            throws ActivitySpecificationException,
                                   ActivityCreationException,
                                   DocumentValidationException

Constructs the activity implementations for each of the activity elements contained in the given perform document.

Parameters:

document - The perform document containing the element to use to create the activities.

Returns:

an array of Activity objects.

Throws:

DocumentValidationException - If the perform document as a whole is in some way invalid e.g. contains unsupported pipes or unsupported activities.

ActivitySpecificationException - If a client mistake prevents one or more activities from being constructed successfully. This may be raised in either of the following circumstances:

• one or more of the activities described in the perform document are unsupported by this factory
• a required element or attribute has been omitted from an activity element in a perform document

ActivityCreationException - If there is some problem that prevents an activity being created. This is typically caused by a configuration or programming error.

java.lang.IllegalArgumentException - If the document is null.

getProperties

public Property[] getProperties()

Gets a array of Property objects associated with the activity list.

Returns:

the array.