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

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