com.googlecode.concurrenttrees.radix.node.concrete.charsequence

Class CharSequenceNodeLeafNullValue

java.lang.Object

com.googlecode.concurrenttrees.radix.node.concrete.charsequence.CharSequenceNodeLeafNullValue

All Implemented Interfaces:

Node, NodeCharacterProvider, Serializable

public class CharSequenceNodeLeafNullValue
extends Object
implements Node

Stores only incoming edge as a CharSequence (a view onto the original key) rather than copying the edge into a character array. Returns null for the value. Does not store any outgoing edges.

Author:

Niall Gallagher

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
CharSequenceNodeLeafNullValue(CharSequence edgeCharSequence)

Method Summary

Methods

Modifier and Type	Method and Description
CharSequence	getIncomingEdge() Returns all characters of the "edge" encoded in this node, belonging to the connection from a parent node to this node.
Character	getIncomingEdgeFirstCharacter() Returns the first character of the "edge" encoded in this node, belonging to the connection from a parent node to this node.
Node	getOutgoingEdge(Character edgeFirstCharacter) Returns the child of this node whose edge starts with the given first character.
List<Node>	getOutgoingEdges() Returns a read-only list of the child nodes to which this node has outgoing edges, i.e.
Object	getValue() Returns a value object which has been associated with a key and which is stored in this node, or returns null if no value is stored in this node.
String	toString()
void	updateOutgoingEdge(Node childNode) Updates the child node reference for a given edge (identified by its first character) to point to a different child node.

Methods inherited from class java.lang.Object

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

Constructor Detail

CharSequenceNodeLeafNullValue

public CharSequenceNodeLeafNullValue(CharSequence edgeCharSequence)

Method Detail

getIncomingEdge

public CharSequence getIncomingEdge()

Description copied from interface: Node

Returns all characters of the "edge" encoded in this node, belonging to the connection from a parent node to this node.

Specified by:

getIncomingEdge in interface Node

Returns:

All characters of the "edge" encoded in this node

getIncomingEdgeFirstCharacter

public Character getIncomingEdgeFirstCharacter()

Description copied from interface: Node

Returns the first character of the "edge" encoded in this node, belonging to the connection from a parent node to this node.

Specified by:

getIncomingEdgeFirstCharacter in interface Node

Specified by:

getIncomingEdgeFirstCharacter in interface NodeCharacterProvider

Returns:

The first character of the "edge" encoded in this node

getValue

public Object getValue()

Description copied from interface: Node

Returns a value object which has been associated with a key and which is stored in this node, or returns null if no value is stored in this node.

Specified by:

getValue in interface Node

Returns:

A value object which has been associated with a key and which is stored in this node, or returns null if no value is stored in this node

getOutgoingEdge

public Node getOutgoingEdge(Character edgeFirstCharacter)

Description copied from interface: Node

Returns the child of this node whose edge starts with the given first character.

This read must be performed atomically, in relation to writes made via Node.updateOutgoingEdge(Node).

Specified by:

getOutgoingEdge in interface Node

Parameters:

edgeFirstCharacter - The first character of the edge for which the associated child node is required

Returns:

The child of this node whose edge starts with the given first character, or null if this node has no such outgoing edge

updateOutgoingEdge

public void updateOutgoingEdge(Node childNode)

Description copied from interface: Node

Updates the child node reference for a given edge (identified by its first character) to point to a different child node.

The first character of the given child node's edge must match the first character of an existing outgoing edge from this node.

This write must be performed atomically, in relation to reads made via Node.getOutgoingEdge(Character).

Specified by:

updateOutgoingEdge in interface Node

Parameters:

childNode - The new child node to associated with this edge

getOutgoingEdges

public List<Node> getOutgoingEdges()

Description copied from interface: Node

Returns a read-only list of the child nodes to which this node has outgoing edges, i.e. child nodes which have incoming edges from this node.

It is intended that this method will be used for copying/cloning nodes.

Specified by:

getOutgoingEdges in interface Node

Returns:

A read-only list of the child nodes to which this node has outgoing edges

toString

public String toString()

Overrides:

toString in class Object