org.azyva.dragom.model.support

Class ModelFactoryHolder

java.lang.Object

org.azyva.dragom.model.support.ModelFactoryHolder

public class ModelFactoryHolder
extends Object

Holds and provides access to a ModelFactory.

Allows generic tools to be provided by Dragom or other third party that can be integrated as a client tool by providing a way for client tools to easily provide the ModelFactory to use. Tools provided by Dragom make use of this strategy.

Generally the ExecContextFactory implementation takes care of initializing the Model using a ModelFactory. DefaultExecContextFactory makes use of this class. Other ExecContextFactory implementations should do the same.

Dragom attempts to remain as independent as possible from external frameworks whose use would have impacts on clients, such as Spring. But at the same time Dragom must not prevent the use of such frameworks. This class allows, but does not force, the ModelFactory to be set using a dependency injection framework such as Spring.

ModelFactoryHolder can also be used by tools without using a dependency injection framework. The ModelFactory can simply be set by bootstrapping code before invoking the tool.

The ModelFactory is simply held in a static variable.

Alternatively a Model can be set within this class, which is also held in a static variable. In this case a very simple ModelFactory is created that simply returns that Model. This provides even more flexibility when a dependency injection framework is used, allowing the Model itself to be provided in such a way. This works only when the Model is the same for all tool executions.

As a convenience, if no ModelFactory or Model is set, the class identified by the org.azyva.dragom.DefaultModelFactory system property is used or DefaultModelFactory if not specified.

Util.applyDragomSystemProperties() is called during initialization of this class.

Author:

David Raymond

Constructor Summary

Constructors

Constructor and Description
ModelFactoryHolder()

Method Summary

Modifier and Type	Method and Description
static org.azyva.dragom.model.ModelFactory	getModelFactory()
static void	setModel(org.azyva.dragom.model.Model model) Sets the Model.
static void	setModelFactory(org.azyva.dragom.model.ModelFactory modelFactory) Sets the ModelFactory.

Methods inherited from class java.lang.Object

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

Constructor Detail

ModelFactoryHolder

public ModelFactoryHolder()

Method Detail

setModelFactory

public static void setModelFactory(org.azyva.dragom.model.ModelFactory modelFactory)

Sets the ModelFactory.

Parameters:

modelFactory - See description.

setModel

public static void setModel(org.azyva.dragom.model.Model model)

Sets the Model.

Parameters:

model - See description.

getModelFactory

public static org.azyva.dragom.model.ModelFactory getModelFactory()

Returns:

ModelFactory set with setModelFactory(org.azyva.dragom.model.ModelFactory) or the default ModelFactory if none has been set.