uk.ac.starlink.datanode.nodes

Class EmptyDataNode

java.lang.Object

uk.ac.starlink.datanode.nodes.DefaultDataNode

uk.ac.starlink.datanode.nodes.EmptyDataNode

All Implemented Interfaces:

DataNode

public class EmptyDataNode
extends DefaultDataNode

Blank node.

Constructor Summary

Constructors

Constructor and Description
EmptyDataNode()

Method Summary

Modifier and Type	Method and Description
boolean	allowsChildren() The DefaultDataNode implementation of this method returns false.
Iterator	getChildIterator() The DefaultDataNode implementation of this method throws UnsupportedOperationException (DefaultDataNode.allowsChildren() is false).
String	getName() Gets the name of this object.
String	toString()

Methods inherited from class uk.ac.starlink.datanode.nodes.DefaultDataNode

beep, configureDetail, getChildMaker, getCreator, getDataObject, getDescription, getIcon, getLabel, getNodeTLA, getNodeType, getParentObject, getPathElement, getPathSeparator, hasDataObject, makeChild, makeErrorChild, registerDataObject, setChildMaker, setCreator, setDescription, setIconID, setLabel, setName, setParentObject

Methods inherited from class java.lang.Object

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

Constructor Detail

EmptyDataNode

public EmptyDataNode()

Method Detail

allowsChildren

public boolean allowsChildren()

Description copied from class: DefaultDataNode

The DefaultDataNode implementation of this method returns false.

Specified by:

allowsChildren in interface DataNode

Overrides:

allowsChildren in class DefaultDataNode

Returns:

true if the node is of a type which can have child nodes, false otherwise

getChildIterator

public Iterator getChildIterator()

Description copied from class: DefaultDataNode

The DefaultDataNode implementation of this method throws UnsupportedOperationException (DefaultDataNode.allowsChildren() is false).

Specified by:

getChildIterator in interface DataNode

Overrides:

getChildIterator in class DefaultDataNode

Returns:

an Iterator over the children. Each object iterated over should be a DataNode. Behaviour is undefined if this method is called on an object for which allowsChildren returns false.

getName

public String getName()

Description copied from interface: DataNode

Gets the name of this object. This is an intrinsic property of the object.

Specified by:

getName in interface DataNode

Overrides:

getName in class DefaultDataNode

Returns:

the name of the object

toString

public String toString()

Overrides:

toString in class DefaultDataNode