oracle.binding.meta

Class EmptyDefinitionContainer

java.lang.Object

oracle.binding.meta.EmptyDefinitionContainer

All Implemented Interfaces:

DefinitionContainer

public final class EmptyDefinitionContainer
extends java.lang.Object
implements DefinitionContainer

An implementation class of DefinitionContainer to represent an empty collection of Definition.

Method Summary

Modifier and Type	Method and Description
Definition	find(java.lang.String definitionId) Find a Definition with the given id.
static DefinitionContainer	getInstance() Obtain the singleton EmptyDefinitionContainer instance.
boolean	isEmpty() Return true if the container is empty.
java.util.Iterator	iterator() Obtain an iterator for looping through each of the Definitions contained in this DefinitionContainer.

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static DefinitionContainer getInstance()

Obtain the singleton EmptyDefinitionContainer instance.

Returns:

The one and only EmptyDefinitionContainer instance.

find

public Definition find(java.lang.String definitionId)

Find a Definition with the given id.

Specified by:

find in interface DefinitionContainer

Parameters:

definitionId - Identifier of the Definition that we want to find.

Returns:

The Definition object with the given identifier. This method always null.

iterator

public java.util.Iterator iterator()

Obtain an iterator for looping through each of the Definitions contained in this DefinitionContainer.

Specified by:

iterator in interface DefinitionContainer

Returns:

An Iterator of Definition instances that are stored in this DefinitionContainer. The Iterator returns from this method contains no element.

isEmpty

public boolean isEmpty()

Return true if the container is empty.

Specified by:

isEmpty in interface DefinitionContainer

Returns:

Always return true since this is an empty container.