Class BlankNodeImpl
- All Implemented Interfaces:
BlankNode
,BlankNodeOrIRI
,RDFTerm
,RDF4JBlankNode
,RDF4JBlankNodeOrIRI
,RDF4JTerm
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate int
private final long
private final long
Fields inherited from class org.apache.commons.rdf.rdf4j.impl.AbstractRDFTerm
value
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionboolean
Check it this RDFTerm is equal to another RDFTerm.int
hashCode()
Calculate a hash code for this RDFTerm.private boolean
Return the term serialised as specified by the RDF-1.1 N-Triples Canonical form.toString()
Return a reference for uniquely identifying the blank node.Methods inherited from class org.apache.commons.rdf.rdf4j.impl.AbstractRDFTerm
asValue
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
Methods inherited from interface org.apache.commons.rdf.rdf4j.RDF4JBlankNode
asValue
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Field Details
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hashCode
private transient int hashCode -
saltUUIDleast
private final long saltUUIDleast -
saltUUIDmost
private final long saltUUIDmost
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Constructor Details
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BlankNodeImpl
BlankNodeImpl(org.eclipse.rdf4j.model.BNode bNode, UUID salt)
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Method Details
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equals
Description copied from interface:RDFTerm
Check it this RDFTerm is equal to another RDFTerm.If this object is an
IRI
, equality is checked usingIRI.equals(Object)
, or if this object is aBlankNode
, equality is checked usingBlankNode.equals(Object)
, or if this object is aLiteral
, equality is checked usingLiteral.equals(Object)
.Implementations MUST also override
RDFTerm.hashCode()
so that two equal Literals produce the same hash code. -
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. -
isValidBlankNodeLabel
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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 interfaceRDFTerm
- Returns:
- The term serialised as RDF-1.1 N-Triples.
- See Also:
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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 twoBlankNode
instances MUST be equal if and only if the two blank nodes are equal according toBlankNode.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 interfaceBlankNode
- Returns:
- A universally unique reference to identify this
BlankNode
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toString
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