org.apache.jena.graph

Class BlankNodeId

java.lang.Object

org.apache.jena.graph.BlankNodeId

public class BlankNodeId
extends Object

System identifier for a blank node. Blank nodes have identity (you can .equals them apart) but no external stable identifier like a URI.

Databases need a persistent identifier for blank nodes - BlankNodeId.

The equivalent concept for the API is AnonId. Historically, that has been in the org.apache.jena.rdf.model package.

This id is guaranteed to be globally unique.

See Also:

JenaParameters.disableBNodeUIDGeneration

Constructor Summary

Constructors

Constructor and Description
BlankNodeId(String id) Create a new BlankNodeId from the string argument supplied.

Method Summary

Modifier and Type	Method and Description
static BlankNodeId	create() Creates new BlankNodeId with a fresh internal id
static BlankNodeId	create(String id) Creates new BlankNodeId with the given id
boolean	equals(Object other) Test whether two id's are the same
boolean	equals1(Object obj)
String	getLabelString() Answer the label string of this BlankNodeId.
int	hashCode() return a hashcode for this id
int	hashCode1()
String	toString() return a string representation of the id

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

BlankNodeId

public BlankNodeId(String id)

Create a new BlankNodeId from the string argument supplied.

Parameters:

id - A string representation of the id to be created.

Method Detail

create

public static BlankNodeId create()

Creates new BlankNodeId with a fresh internal id

create

public static BlankNodeId create(String id)

Creates new BlankNodeId with the given id

hashCode1

public int hashCode1()

hashCode

public int hashCode()

return a hashcode for this id

Overrides:

hashCode in class Object

Returns:

the hash code

equals

public boolean equals(Object other)

Test whether two id's are the same

Overrides:

equals in class Object

Parameters:

other - the object to be compared

Returns:

true if and only if the two id's are the same

equals1

public boolean equals1(Object obj)

toString

public String toString()

return a string representation of the id

Overrides:

toString in class Object

Returns:

a string representation of the id

getLabelString

public String getLabelString()

Answer the label string of this BlankNodeId. To be used in preference to toString