net.sourceforge.esw.collection
Class MetaFactory

java.lang.Object
  |
  +--net.sourceforge.esw.collection.MetaFactory

public class MetaFactory

extends java.lang.Object

Responsible for creation of IMetaCollection instances.

This is the Abstract Factory of the Abstract Factory design pattern.

If a client of the MetaFactory or graph package wishes to provide custom implementations of the IMetaCollection interface, they would also need to create a new IMetaFactory implementor. This IMetaFactory implementor would be set on the MetaFactory and would allow the new custom IMetaCollection instances to be used throughout the architecture.

The default implementation returns the ESW implementation of the IMetaCollection interface.

Examples:

   MyCustomMetaFactory customFactory = new MyCustomMetaFactory();
   MetaFactory.setMetaFactory( customFactory );
 

See Also:

IMetaCollection

Field Summary

protected static IMetaFactory

metaFactory The IMetaFactory instance to which IMetaCollection instance creation is delegated.

Constructor Summary

MetaFactory()

Method Summary

static IMetaCollection	createMetaCollection() Creates a new empty IMetaCollection instance.
static IMetaCollection	createMetaCollection(INode aNode) Creates a new IMetaCollection that wraps the given INode instance.
static IMetaCollection	createMetaCollection(java.lang.Object aID) Creates a new IMetaCollection instance with the specified identifier.
static IMetaCollection	createMetaCollection(java.lang.Object aID, java.lang.Object aValue) Creates a new IMetaCollection instance with the specified identifier and value.
static IMetaFactory	getMetaFactory() Returns the IMetaFactory instance being used by this MetaFactory.
static void	setMetaFactory(IMetaFactory aMetaFactory) Sets the IMetaFactory instance to be used by this MetaFactory.

Methods inherited from class java.lang.Object

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

Field Detail

metaFactory

protected static IMetaFactory metaFactory

The IMetaFactory instance to which IMetaCollection instance creation is delegated.

Constructor Detail

MetaFactory

public MetaFactory()

Method Detail

createMetaCollection

public static IMetaCollection createMetaCollection()

Creates a new empty IMetaCollection instance.

Returns:

an empty IMetaCollection instance.

createMetaCollection

public static IMetaCollection createMetaCollection(java.lang.Object aID)

Creates a new IMetaCollection instance with the specified identifier.

Parameters:

aID - the identifier used by the IMetaCollection instance.

Returns:

an IMetaCollection instance with the specified identifier.

createMetaCollection

public static IMetaCollection createMetaCollection(INode aNode)

Creates a new IMetaCollection that wraps the given INode instance.

Parameters:

aNode - the INode instance to wrap in the returned IMetaCollection instance.

Returns:

a new IMetaCollection that wraps the given INode instance.

createMetaCollection

public static IMetaCollection createMetaCollection(java.lang.Object aID,
                                                   java.lang.Object aValue)

Creates a new IMetaCollection instance with the specified identifier and value.

Parameters:

aID - the identifier used by the IMetaCollection instance.

aValue - the value used by the IMetaCollection instance.

Returns:

an IMetaCollection instance with the specified identifier and value.

setMetaFactory

public static void setMetaFactory(IMetaFactory aMetaFactory)

Sets the IMetaFactory instance to be used by this MetaFactory.

Parameters:

aMetaFactory - the IMetaFactory instance to be used.

getMetaFactory

public static IMetaFactory getMetaFactory()

Returns the IMetaFactory instance being used by this MetaFactory.