uk.org.ogsadai.activity.xmldb.commands
Interface CommandFactory

All Known Implementing Classes:

PropertiesCommandFactory

public interface CommandFactory

A CommandFactory creates Command instances based on the supplied command Element.

Author:

The OGSA-DAI Project Team

Method Summary

Command

createCommand(org.w3c.dom.Element element) Creates and instantiates the Command that corresponds to the specified element.

Method Detail

createCommand

public Command createCommand(org.w3c.dom.Element element)
                      throws XMLDBCommandCreationException,
                             XMLDBUnsupportedCommandException,
                             XMLDBCommandSpecificationException,
                             XMLDBCommandExecutionException

Creates and instantiates the Command that corresponds to the specified element.

Parameters:

element - The element to map to a corresponding Command implementation.

Returns:

the newly created Command

Throws:

XMLDBCommandCreationException - If there is a problem when creating the Command.

XMLDBUnsupportedCommandException - If the Command is not known to the factory.

XMLDBCommandSpecificationException - If there is a problem parsing element or initialising the command due to incorrect values in the command provided by a client.

XMLDBCommandExecutionException - If there is an internal problem