Class JsonLdBlankNodeImpl

java.lang.Object

org.apache.commons.rdf.jsonldjava.JsonLdTermImpl

org.apache.commons.rdf.jsonldjava.JsonLdBlankNodeImpl

All Implemented Interfaces:

BlankNode, BlankNodeOrIRI, RDFTerm, JsonLdBlankNode, JsonLdTerm

final class JsonLdBlankNodeImpl
extends JsonLdTermImpl
implements JsonLdBlankNode

Field Summary

Fields

Modifier and Type	Field	Description
private final String	blankNodePrefix

Fields inherited from class JsonLdTermImpl

node

Constructor Summary

Constructors

Constructor	Description
JsonLdBlankNodeImpl(com.github.jsonldjava.core.RDFDataset.Node node, String blankNodePrefix)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)	Check it this RDFTerm is equal to another RDFTerm.
int	hashCode()	Calculate a hash code for this RDFTerm.
String	ntriplesString()	Return the term serialised as specified by the RDF-1.1 N-Triples Canonical form.
String	toString()
String	uniqueReference()	Return a reference for uniquely identifying the blank node.

Methods inherited from class JsonLdTermImpl

asJsonLdNode

Methods inherited from class Object

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

Methods inherited from interface JsonLdTerm

asJsonLdNode

Field Details

blankNodePrefix

private final String blankNodePrefix

Constructor Details

JsonLdBlankNodeImpl

JsonLdBlankNodeImpl(com.github.jsonldjava.core.RDFDataset.Node node,
 String blankNodePrefix)

Method Details

ntriplesString

public String ntriplesString()

Description copied from interface: RDFTerm

Return the term serialised as specified by the RDF-1.1 N-Triples Canonical form.

Specified by:

ntriplesString in interface RDFTerm

Returns:

The term serialised as RDF-1.1 N-Triples.

See Also:

• RDF-1.1 N-Triples Canonical form

uniqueReference

public String uniqueReference()

Description copied from interface: BlankNode

Return a reference for uniquely identifying the blank node.

The reference string MUST universally and uniquely identify this blank node. That is, different blank nodes created separately in different JVMs or from different RDF instances MUST NOT have the same reference string.

The BlankNode.uniqueReference() of two BlankNode instances MUST be equal if and only if the two blank nodes are equal according to BlankNode.equals(Object).

Clients should not assume any particular structure of the reference string, however it is recommended that the reference string contain a UUID-derived string, e.g. as returned from UUID.toString().

IMPORTANT: This is not a blank node identifier nor a serialization/syntax label, and there are no guarantees that it is a valid identifier in any concrete RDF syntax. For an N-Triples compatible identifier, use RDFTerm.ntriplesString().

Specified by:

uniqueReference in interface BlankNode

Returns:

A universally unique reference to identify this BlankNode

equals

public boolean equals(Object obj)

Description copied from interface: RDFTerm

Check it this RDFTerm is equal to another RDFTerm.

If this object is an IRI, equality is checked using IRI.equals(Object), or if this object is a BlankNode, equality is checked using BlankNode.equals(Object), or if this object is a Literal, equality is checked using Literal.equals(Object).

Implementations MUST also override RDFTerm.hashCode() so that two equal Literals produce the same hash code.

Specified by:

equals in interface BlankNode

Specified by:

equals in interface RDFTerm

Overrides:

equals in class Object

Parameters:

obj - Another object

Returns:

true if other is a RDFTerm and is equal to this

See Also:

• IRI.equals(Object)
• BlankNode.equals(Object)
• Literal.equals(Object)

hashCode

public int hashCode()

Description copied from interface: RDFTerm

Calculate a hash code for this RDFTerm.

As an RDFTerm is immutable, this method will always return the same hashCode over the lifetime of this object.

This method MUST be implemented in conjunction with RDFTerm.equals(Object) so that two equal RDFTerm produce the same hash code.

Specified by:

hashCode in interface BlankNode

Specified by:

hashCode in interface RDFTerm

Overrides:

hashCode in class Object

Returns:

a hash code value for this RDFTerm.

See Also:

• IRI.hashCode()
• Literal.hashCode()
• BlankNode.hashCode()

toString

public String toString()

Overrides:

toString in class JsonLdTermImpl