org.ilrt.inkling.api
Class Node

java.lang.Object
  |
  +--org.ilrt.inkling.api.Node

Direct Known Subclasses:

SQLNode, TreeNode

public class Node

extends java.lang.Object

Inspired by http://www.w3.org/2001/12/rubyrdf/basicrdf.rb

This is a simple Node class. use Node.getResource(), Node.getLiteral()
and Node.getBlank() to create Nodes; also can have getSubjects(),
getObjects(), getPredicates(), with or without an identifier for the
Node as a  node-centric API.

There isn't any Caching or reuse of Nodes.

Field Summary

boolean	isbnode
boolean	isresource

Constructor Summary

Node()
Construtor for a basic Node with nothing in it

Node(java.lang.String content)
Construtor for a basic Node with specific content

Method Summary

boolean	equals(java.lang.Object o) Overriding equals for ease of comparison
static Node	getBlank(java.lang.String id) Use this method to create a blank Node
static Node	getBlank(java.lang.String id, Graph graph) Use this method to create a Blank Node, also setting the Graph that contains it Note that generation of ID where the source url is known is a hash of the source with the id of the node from the parser, retaining identity of Nodes
java.lang.String	getContent() Returns the Stringified value of the Node
Graph	getGraph() Returns the Graph which contains the Node
java.lang.String	getID() Returns the identifier of the Node
static Node	getLiteral(java.lang.String content) Use this method to create a Literal Node
static Node	getLiteral(java.lang.String content, Graph graph) Use this method to create a Literal Node with a refernce to the Graph
java.util.Vector	getObjects() Node-centric Graph traversal
java.util.Vector	getObjects(java.lang.String predid) Node-centric Graph traversal
java.util.Vector	getPredicates() Node-centric Graph traversal
java.util.Vector	getPredicates(java.lang.String objid) Node-centric Graph traversal
static Node	getResource(java.lang.String content) Use this method to create a Resource Node
static Node	getResource(java.lang.String content, Graph graph) Use this method to create a Resource Node, also setting the Graph that contains it
java.util.Vector	getSubjects() Node-centric Graph traversal
java.util.Vector	getSubjects(java.lang.String predid) Node-centric Graph traversal
java.lang.String	inspect() Method for printing content
void	setContent(java.lang.String content) Sets the content value of the Node
void	setGraph(Graph graph) For setting the Graph which contains the Node
void	setID(java.lang.String id) Sets the internal ID of the Node
java.lang.String	sha1() Useful sha1 of content of Node
java.lang.String	toString() Method for printing content

Methods inherited from class java.lang.Object

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

Field Detail

isresource

public boolean isresource

isbnode

public boolean isbnode

Constructor Detail

Node

public Node()

Construtor for a basic Node with nothing in it

Node

public Node(java.lang.String content)

Construtor for a basic Node with specific content

Method Detail

getContent

public java.lang.String getContent()

Returns the Stringified value of the Node

getGraph

public Graph getGraph()

Returns the Graph which contains the Node

setContent

public void setContent(java.lang.String content)

Sets the content value of the Node

setGraph

public void setGraph(Graph graph)

For setting the Graph which contains the Node

getID

public java.lang.String getID()

Returns the identifier of the Node

setID

public void setID(java.lang.String id)

Sets the internal ID of the Node

inspect

public java.lang.String inspect()

Method for printing content

toString

public java.lang.String toString()

Method for printing content

Overrides:

toString in class java.lang.Object

getResource

public static Node getResource(java.lang.String content)

Use this method to create a Resource Node

getResource

public static Node getResource(java.lang.String content,
                               Graph graph)

Use this method to create a Resource Node, also setting the Graph that contains it

getBlank

public static Node getBlank(java.lang.String id)

Use this method to create a blank Node

getBlank

public static Node getBlank(java.lang.String id,
                            Graph graph)

Use this method to create a Blank Node, also setting the Graph that contains it Note that generation of ID where the source url is known is a hash of the source with the id of the node from the parser, retaining identity of Nodes

getLiteral

public static Node getLiteral(java.lang.String content)

Use this method to create a Literal Node

getLiteral

public static Node getLiteral(java.lang.String content,
                              Graph graph)

Use this method to create a Literal Node with a refernce to the Graph

sha1

public java.lang.String sha1()

Useful sha1 of content of Node

getObjects

public java.util.Vector getObjects(java.lang.String predid)

Node-centric Graph traversal

getObjects

public java.util.Vector getObjects()

Node-centric Graph traversal

getSubjects

public java.util.Vector getSubjects(java.lang.String predid)

Node-centric Graph traversal

getSubjects

public java.util.Vector getSubjects()

Node-centric Graph traversal

getPredicates

public java.util.Vector getPredicates(java.lang.String objid)

Node-centric Graph traversal

getPredicates

public java.util.Vector getPredicates()

Node-centric Graph traversal

equals

public boolean equals(java.lang.Object o)

Overriding equals for ease of comparison

Overrides:

equals in class java.lang.Object