Module org.apache.jena.core

Package org.apache.jena.graph

Class Node_Variable

java.lang.Object

org.apache.jena.graph.Node

org.apache.jena.graph.Node_Fluid

org.apache.jena.graph.Node_Variable

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

Node_RuleVariable

public class Node_Variable
extends Node_Fluid

"variable" nodes; these are outside the RDF2003 specification, but are used internally for "placeholder" nodes where blank nodes would be wrong, most specifically in Query.

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Node_Variable.VariableName

Nested classes/interfaces inherited from class org.apache.jena.graph.Node

Node.NotLiteral

Field Summary

Fields inherited from class org.apache.jena.graph.Node

ANY

Constructor Summary

Constructors

Constructor	Description
Node_Variable(String name)	Initialise this Node_Variable from a string name, which becomes wrapped in a VariableName.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object other)	Nodes only equal other Nodes that have equal labels.
String	getName()	get a variable nodes name, otherwise die horribly
boolean	isVariable()	Answer true iff this node is a variable node - subclasses override
String	toString()	Answer a human-readable representation of this Node.
static Object	variable(String name)
Object	visitWith(NodeVisitor v)	Visit a Node and dispatch on it to the appropriate method from the NodeVisitor v.

Methods inherited from class org.apache.jena.graph.Node_Fluid

isConcrete

Methods inherited from class org.apache.jena.graph.Node

getBlankNodeId, getBlankNodeLabel, getGraph, getIndexingValue, getLiteral, getLiteralDatatype, getLiteralDatatypeURI, getLiteralIsXML, getLiteralLanguage, getLiteralLexicalForm, getLiteralValue, getLocalName, getNameSpace, getTriple, getURI, hashCode, hasURI, isBlank, isExt, isLiteral, isNodeGraph, isNodeTriple, isURI, matches, sameValueAs, toString, toString, toString

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Details

Node_Variable

public Node_Variable(String name)

Initialise this Node_Variable from a string name, which becomes wrapped in a VariableName.

Method Details

getName

public String getName()

Description copied from class: Node

get a variable nodes name, otherwise die horribly

Overrides:

getName in class Node

visitWith

public Object visitWith(NodeVisitor v)

Description copied from class: Node

Visit a Node and dispatch on it to the appropriate method from the NodeVisitor v.

Specified by:

visitWith in class Node

Parameters:

v - the visitor to apply to the node

Returns:

the value returned by the applied method

isVariable

public boolean isVariable()

Description copied from class: Node

Answer true iff this node is a variable node - subclasses override

Overrides:

isVariable in class Node

toString

public String toString()

Description copied from class: Node

Answer a human-readable representation of this Node. It will not compress URIs, nor quote literals (because at the moment too many places use toString() for something machine-oriented).

Overrides:

toString in class Node

equals

public boolean equals(Object other)

Description copied from class: Node

Nodes only equal other Nodes that have equal labels.

Specified by:

equals in class Node

variable

public static Object variable(String name)