Module org.apache.jena.arq
Package org.apache.jena.system

Class G

java.lang.Object
org.apache.jena.system.G
public class G extends Object
A library of functions for working with Graph. Internally all ExtendedIterators used, run to completion or have .close() called. Any ExtendedIterators returned by functions in this library must be used in the same way

  • Method Summary

    Modifier and Type
    Method
    Description
    static void
    addInto(org.apache.jena.graph.Graph dstGraph, org.apache.jena.graph.Graph srcGraph)
    Add triples into the destination (arg 1) from the source (arg 2)
    static Set<org.apache.jena.graph.Node>
    allNodesOfTypeRDFS(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node type)
    List all the node of type, including considering rdfs:subClassOf
    static <X> boolean
    allNonNull(X... objects)
    Are all the arguments non-null?
    static Set<org.apache.jena.graph.Node>
    allPO(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
    Return a set of all subjects for predicate-object
    static Set<org.apache.jena.graph.Node>
    allSP(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate)
    Return a set of all objects for subject-predicate
    static Set<org.apache.jena.graph.Node>
    allTypesOfNodeRDFS(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node node)
    List all the types of a node, including super-classes.
    static void
    apply(org.apache.jena.graph.Graph src, Consumer<org.apache.jena.graph.Triple> action)
    Apply an action to every triple of a graph.
    static void
    apply(org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Triple> iter, Consumer<org.apache.jena.graph.Triple> action)
    Apply an action to every triple of an iterator.
    static String
    asString(org.apache.jena.graph.Node x)
    Get a string, assuming the node is an xsd:string literal.
    static <X> X
    atMostOne(X... objects)
    Is one or none of the arguments non-null?
    static <X> X
    calcTxn(org.apache.jena.graph.Graph graph, Supplier<X> action)
    Execute a graph transaction and result result if the graph supports transactions else execute and return without a transaction wrapper.
    static void
    clear(org.apache.jena.graph.Graph graph)
    Clear graph.
    static boolean
    contains(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
    Does the graph match the s/p/o pattern?
    static boolean
    containsByLang(org.apache.jena.graph.Graph g, org.apache.jena.graph.Node s, org.apache.jena.graph.Node p, org.apache.jena.graph.Node o)
    Contains, and language tags compare case-insentively
    static boolean
    containsBySameTerm(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node s, org.apache.jena.graph.Node p, org.apache.jena.graph.Node o)
    Test whether a graph contains by "same term", regardless of whether the graph implements "same value" or "same term".
    static boolean
    containsBySameTerm(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Triple triple)
    Test whether a graph contains by "same term", regardless of whether the graph implements "same value" or "same term".
    static boolean
    containsNode(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node node)
    Does the graph use the node anywhere as a subject, predicate or object?
    static boolean
    containsOne(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
    Contains exactly one.
    static org.apache.jena.graph.Graph
    copy(org.apache.jena.graph.Graph src)
    Creates a copy of the given graph.
    static void
    copyGraphSrcToDst(org.apache.jena.graph.Graph src, org.apache.jena.graph.Graph dst)
    Add src to dst - assumes transaction.
    static long
    count(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
    Count occurrences of the pattern.
    static <X> int
    countNonNulls(X... objects)
    Count non-nulls
    static long
    countPO(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
    Count matches of predicate-object (which can be wildcards).
    static long
    countSP(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate)
    Count matches of subject-predicate (which can be wildcards).
    static void
    deleteModify(org.apache.jena.graph.Graph modify, org.apache.jena.graph.Graph srcGraph)
    Delete triples in the graph-to-modify (arg 1) that are in the source (arg 2).
    static <X> boolean
    exactlyOneSet(X... objects)
    Is one and only one argument non-null?
    static void
    execTxn(org.apache.jena.graph.Graph graph, Runnable action)
    Execute a graph transaction if the graph supports transactions else apply without a transaction wrapper.
    static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Triple>
    find(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
    Graph.find(Node, Node, Node) as a function.
    static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Triple>
    findAll(org.apache.jena.graph.Graph graph)
    Graph.find() as a function.
    static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Triple>
    findByLang(org.apache.jena.graph.Graph g, org.apache.jena.graph.Node s, org.apache.jena.graph.Node p, org.apache.jena.graph.Node o)
    Contains, and language tags match case-insentively
    static void
    findExec(org.apache.jena.graph.Graph graph, Consumer<org.apache.jena.graph.Triple> action, org.apache.jena.graph.Node s, org.apache.jena.graph.Node p, org.apache.jena.graph.Node o)
    Find triples and execute an action on each triple found.
    static org.apache.jena.graph.Triple
    getOne(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
    Get triple if there is exactly one to match the s/p/o, else throw RDFDataException.
    static Quad
    getOne(DatasetGraph dsg, org.apache.jena.graph.Node graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
    Get quad if there is exactly one to match the s/p/o, else throw RDFDataException.
    static List<org.apache.jena.graph.Node>
    getOneOrList(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node node)
    Return a java list where the node is an RDF list of nodes or a single node (returned a singleton list).
    static org.apache.jena.graph.Triple
    getOneOrNull(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
    Get triple if there is exactly one to match the s/p/o; else return null if none or more than one.
    static Quad
    getOneOrNull(DatasetGraph dsg, org.apache.jena.graph.Node graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
    Get triple if there is exactly one to match the s/p/o; else return null if none or more than one.
    static org.apache.jena.graph.Node
    getOnePO(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
    Get the subject for predicate-object.
    static org.apache.jena.graph.Node
    getOneSP(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate)
    Get object for subject-predicate.
    static org.apache.jena.graph.Node
    getPO(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
    Get the subject, given predicate and object.
    static org.apache.jena.graph.Node
    getSP(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate)
    Get object, given subject and predicate.
    static org.apache.jena.graph.Triple
    getZeroOrOne(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
    Get triple if there is exactly one to match the s/p/o; return null if none; throw RDFDataException if more than one.
    static Quad
    getZeroOrOne(DatasetGraph dsg, org.apache.jena.graph.Node graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
    Get triple if there is exactly one to match the s/p/o; return null if none; throw RDFDataException if more than one.
    static org.apache.jena.graph.Node
    getZeroOrOnePO(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
    Get the subject for predicate-object.
    static org.apache.jena.graph.Node
    getZeroOrOneSP(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate)
    Get object for subject-predicate.
    static boolean
    hasDatatype(org.apache.jena.graph.Node n, org.apache.jena.datatypes.RDFDatatype datatype)
    Return true if n is a literal and it has the given datatype, else return false.
    static boolean
    hasLang(org.apache.jena.graph.Node node)
    Test whether a node has a language tag.
    static boolean
    hasOnePO(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
    Test whether there is exactly one subject for the predicate-object.
    static boolean
    hasOneSP(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate)
    Test whether there is exactly one object for the subject-predicate.
    static boolean
    hasProperty(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate)
    Does node s have property p in graph g?
    static boolean
    hasType(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node node, org.apache.jena.graph.Node type)
    Does the node x have the given type (non-RDFS - no rdfs:subclassOf considered)?
    static boolean
    isBlank(org.apache.jena.graph.Node n)
     
    static boolean
    isBoolean(org.apache.jena.graph.Node n)
     
    static boolean
    isLiteral(org.apache.jena.graph.Node n)
     
    static boolean
    isNodeGraph(org.apache.jena.graph.Node n)
     
    static boolean
    isNodeTriple(org.apache.jena.graph.Node n)
     
    static boolean
    isNullOrAny(org.apache.jena.graph.Node n)
     
    static boolean
    isOfType(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node node, org.apache.jena.graph.Node type)
    Test whether the node has the type or one of its types is an rdfs:subclassOf the type.
    static boolean
    isResource(org.apache.jena.graph.Node n)
     
    static boolean
    isString(org.apache.jena.graph.Node n)
     
    static boolean
    isURI(org.apache.jena.graph.Node n)
     
    static Iterator<org.apache.jena.graph.Node>
    iterObjects(org.apache.jena.graph.Graph graph)
    List the objects in a graph (no duplicates)
    static Iterator<org.apache.jena.graph.Node>
    iterObjectsOfPredicate(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node predicate)
    List the objects in a graph (no duplicates)
    static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Node>
    iterPO(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
    ExtendedIterator of subjects where the triple matches for predicate and object (which can be wildcards).
    static Iterator<org.apache.jena.graph.Node>
    iterPredicates(org.apache.jena.graph.Graph graph)
    List the predicates in a graph (no duplicates)
    static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Node>
    iterSP(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate)
    ExtendedIterator of objects where the triple matches for subject and predicate (which can be wildcards).
    static Iterator<org.apache.jena.graph.Node>
    iterSubjects(org.apache.jena.graph.Graph graph)
    List the subjects in a graph (no duplicates)
    static Iterator<org.apache.jena.graph.Node>
    iterSubjectsOfPredicate(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node predicate)
    List the subjects of a predicate in a graph (no duplicates)
    static List<org.apache.jena.graph.Node>
    listNodesOfTypeRDFS(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node type)
    List all the nodes of type, including nodes of sub-classes.
    static List<org.apache.jena.graph.Node>
    listPO(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
    List of subjects matching the predicate-object (which can be wildcards).
    static List<org.apache.jena.graph.Node>
    listSP(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate)
    List of objects matching the subject-predicate (which can be wildcards).
    static List<org.apache.jena.graph.Node>
    listSubClasses(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node type)
    List the subclasses of a type, including itself.
    static List<org.apache.jena.graph.Node>
    listSuperClasses(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node type)
    List the super-classes of a type, including itself.
    static List<org.apache.jena.graph.Node>
    listTypesOfNodeRDFS(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node node)
    List the types of a node, following rdfs:subClassOf for super classes.
    static List<org.apache.jena.graph.Node>
    nodesOfTypeAsList(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node type)
    List the subjects with exactly type.
    static Set<org.apache.jena.graph.Node>
    nodesOfTypeAsSet(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node type)
    Set of nodes with exactly type.
    static org.apache.jena.graph.Node
    nullAsAny(org.apache.jena.graph.Node x)
    Convert null to Node.ANY
    static org.apache.jena.graph.Node
    nullAsDft(org.apache.jena.graph.Node x, org.apache.jena.graph.Node dft)
    Convert null to some default Node
    static org.apache.jena.graph.Node
    object(org.apache.jena.graph.Triple triple)
    Return the object of a triple, or null if the triple is null.
    static long
    objectConnectiveness(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node object)
    Count the number of in-arc to an object
    static boolean
    oneConnected(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node object)
    Test whether an object has exactly one in-arc.
    static org.apache.jena.graph.Node
    predicate(org.apache.jena.graph.Triple triple)
    Return the predicate of a triple, or null if the triple is null.
    static Iterator<org.apache.jena.graph.Node>
    quad2graphName(Iterator<Quad> iter)
    Project quad to graph name
    static Iterator<org.apache.jena.graph.Node>
    quad2object(Iterator<Quad> iter)
    Project quad to object
    static Iterator<org.apache.jena.graph.Node>
    quad2predicate(Iterator<Quad> iter)
    Project quad to predicate
    static Iterator<org.apache.jena.graph.Node>
    quad2subject(Iterator<Quad> iter)
    Project quad to subject
    static org.apache.jena.atlas.iterator.Iter<org.apache.jena.graph.Triple>
    quads2triples(Iterator<Quad> iter)
    Project quads to triples
    static List<org.apache.jena.graph.Node>
    rdfList(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node node)
    Return a java list for an RDF list of data.
    static boolean
    sameTermMatch(org.apache.jena.graph.Node match, org.apache.jena.graph.Node data)
    Match a node, which can be a wildcard (ANY or null) against a ground RDF Term (ANY and variables are considered ground terms in the data term).
    static boolean
    sameTermMatch(org.apache.jena.graph.Node matchSubj, org.apache.jena.graph.Node matchPred, org.apache.jena.graph.Node matchObj, org.apache.jena.graph.Triple dataTriple)
    Match S/P/O which can be wildcards (ANY or null), against a ground triple (even ANY and variables are considered ground terms in the data triple).
    static Set<org.apache.jena.graph.Node>
    subClasses(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node type)
    Set of the subclasses of a type, including itself.
    static org.apache.jena.graph.Node
    subject(org.apache.jena.graph.Triple triple)
    Return the subject of a triple, or null if the triple is null.
    static Set<org.apache.jena.graph.Node>
    superClasses(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node type)
    Set of the subclasses of a type, including itself.
    static Iterator<org.apache.jena.graph.Node>
    triple2object(Iterator<org.apache.jena.graph.Triple> iter)
    Project triple to object
    static Iterator<org.apache.jena.graph.Node>
    triple2predicate(Iterator<org.apache.jena.graph.Triple> iter)
    Project triple to predicate
    static Iterator<org.apache.jena.graph.Node>
    triple2subject(Iterator<org.apache.jena.graph.Triple> iter)
    Project triple to subject
    static org.apache.jena.atlas.iterator.Iter<Quad>
    triples2quads(org.apache.jena.graph.Node graphNode, Iterator<org.apache.jena.graph.Triple> iter)
    Convert an iterator of triples into quads for the specified graph name.
    static org.apache.jena.atlas.iterator.Iter<Quad>
    triples2quadsDftGraph(Iterator<org.apache.jena.graph.Triple> iter)
    Convert an iterator of triples into quads for the default graph.
    static List<org.apache.jena.graph.Node>
    typesOfNodeAsList(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node node)
    List the types of a node/subject.
    static Set<org.apache.jena.graph.Node>
    typesOfNodeAsSet(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node node)
    Set of exact types of a node.

    Methods inherited from class java.lang.Object

    equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Method Details

    • subject

      public static org.apache.jena.graph.Node subject(org.apache.jena.graph.Triple triple)
      Return the subject of a triple, or null if the triple is null.

    • predicate

      public static org.apache.jena.graph.Node predicate(org.apache.jena.graph.Triple triple)
      Return the predicate of a triple, or null if the triple is null.

    • object

      public static org.apache.jena.graph.Node object(org.apache.jena.graph.Triple triple)
      Return the object of a triple, or null if the triple is null.

    • isURI

      public static boolean isURI(org.apache.jena.graph.Node n)

    • isBlank

      public static boolean isBlank(org.apache.jena.graph.Node n)

    • isLiteral

      public static boolean isLiteral(org.apache.jena.graph.Node n)

    • isResource

      public static boolean isResource(org.apache.jena.graph.Node n)

    • isNodeTriple

      public static boolean isNodeTriple(org.apache.jena.graph.Node n)

    • isNodeGraph

      public static boolean isNodeGraph(org.apache.jena.graph.Node n)

    • isNullOrAny

      public static boolean isNullOrAny(org.apache.jena.graph.Node n)

    • hasDatatype

      public static boolean hasDatatype(org.apache.jena.graph.Node n, org.apache.jena.datatypes.RDFDatatype datatype)
      Return true if n is a literal and it has the given datatype, else return false.

    • isString

      public static boolean isString(org.apache.jena.graph.Node n)

    • isBoolean

      public static boolean isBoolean(org.apache.jena.graph.Node n)

    • nullAsAny

      public static org.apache.jena.graph.Node nullAsAny(org.apache.jena.graph.Node x)
      Convert null to Node.ANY

    • nullAsDft

      public static org.apache.jena.graph.Node nullAsDft(org.apache.jena.graph.Node x, org.apache.jena.graph.Node dft)
      Convert null to some default Node

    • asString

      public static String asString(org.apache.jena.graph.Node x)
      Get a string, assuming the node is an xsd:string literal.

    • contains

      public static boolean contains(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
      Does the graph match the s/p/o pattern?

    • containsNode

      public static boolean containsNode(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node node)
      Does the graph use the node anywhere as a subject, predicate or object?

    • isOfType

      public static boolean isOfType(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node node, org.apache.jena.graph.Node type)
      Test whether the node has the type or one of its types is an rdfs:subclassOf the type.

    • hasType

      public static boolean hasType(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node node, org.apache.jena.graph.Node type)
      Does the node x have the given type (non-RDFS - no rdfs:subclassOf considered)?

    • hasProperty

      public static boolean hasProperty(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate)
      Does node s have property p in graph g?

    • containsOne

      public static boolean containsOne(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
      Contains exactly one.

    • getSP

      public static org.apache.jena.graph.Node getSP(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate)
      Get object, given subject and predicate. Returns one (non-deterministically) or null. See also getOneSP(org.apache.jena.graph.Graph, org.apache.jena.graph.Node, org.apache.jena.graph.Node) and getZeroOrOneSP(org.apache.jena.graph.Graph, org.apache.jena.graph.Node, org.apache.jena.graph.Node).

    • getOneSP

      public static org.apache.jena.graph.Node getOneSP(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate)
      Get object for subject-predicate. Must be exactly one object; exception RDFDataException thrown when none or more than one.

    • hasOneSP

      public static boolean hasOneSP(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate)
      Test whether there is exactly one object for the subject-predicate.

    • getZeroOrOneSP

      public static org.apache.jena.graph.Node getZeroOrOneSP(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate)
      Get object for subject-predicate. Return null for none, object for one, and exception RDFDataException if more than one.

    • getPO

      public static org.apache.jena.graph.Node getPO(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
      Get the subject, given predicate and object. Returns one (non-deterministically) or null. See also getOnePO(org.apache.jena.graph.Graph, org.apache.jena.graph.Node, org.apache.jena.graph.Node) and getZeroOrOnePO(org.apache.jena.graph.Graph, org.apache.jena.graph.Node, org.apache.jena.graph.Node).

    • getOnePO

      public static org.apache.jena.graph.Node getOnePO(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
      Get the subject for predicate-object. Must be exactly one subject; exception RDFDataException thrown when none or more than one.

    • hasOnePO

      public static boolean hasOnePO(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
      Test whether there is exactly one subject for the predicate-object.

    • getZeroOrOnePO

      public static org.apache.jena.graph.Node getZeroOrOnePO(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
      Get the subject for predicate-object. Return null for none, subject for one, throw exception RDFDataException if more than one.

    • getOne

      public static org.apache.jena.graph.Triple getOne(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
      Get triple if there is exactly one to match the s/p/o, else throw RDFDataException.

    • getZeroOrOne

      public static org.apache.jena.graph.Triple getZeroOrOne(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
      Get triple if there is exactly one to match the s/p/o; return null if none; throw RDFDataException if more than one.

    • getOneOrNull

      public static org.apache.jena.graph.Triple getOneOrNull(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
      Get triple if there is exactly one to match the s/p/o; else return null if none or more than one.

    • getOne

      public static Quad getOne(DatasetGraph dsg, org.apache.jena.graph.Node graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
      Get quad if there is exactly one to match the s/p/o, else throw RDFDataException.

    • getZeroOrOne

      public static Quad getZeroOrOne(DatasetGraph dsg, org.apache.jena.graph.Node graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
      Get triple if there is exactly one to match the s/p/o; return null if none; throw RDFDataException if more than one.

    • getOneOrNull

      public static Quad getOneOrNull(DatasetGraph dsg, org.apache.jena.graph.Node graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
      Get triple if there is exactly one to match the s/p/o; else return null if none or more than one.

    • iterSP

      public static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Node> iterSP(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate)
      ExtendedIterator of objects where the triple matches for subject and predicate (which can be wildcards). The ExtendedIterator must be fully used or explicitly closed. It is preferable use listSP(org.apache.jena.graph.Graph, org.apache.jena.graph.Node, org.apache.jena.graph.Node) which handles this condition.

    • listSP

      public static List<org.apache.jena.graph.Node> listSP(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate)
      List of objects matching the subject-predicate (which can be wildcards).

    • countSP

      public static long countSP(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate)
      Count matches of subject-predicate (which can be wildcards).

    • iterPO

      public static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Node> iterPO(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
      ExtendedIterator of subjects where the triple matches for predicate and object (which can be wildcards). The ExtendedIterator must be fully used or explicitly closed. It is preferable use listSP(org.apache.jena.graph.Graph, org.apache.jena.graph.Node, org.apache.jena.graph.Node) which handles this condition.

    • listPO

      public static List<org.apache.jena.graph.Node> listPO(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
      List of subjects matching the predicate-object (which can be wildcards).

    • countPO

      public static long countPO(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
      Count matches of predicate-object (which can be wildcards).

    • iterSubjects

      public static Iterator<org.apache.jena.graph.Node> iterSubjects(org.apache.jena.graph.Graph graph)
      List the subjects in a graph (no duplicates)

    • iterPredicates

      public static Iterator<org.apache.jena.graph.Node> iterPredicates(org.apache.jena.graph.Graph graph)
      List the predicates in a graph (no duplicates)

    • iterObjects

      public static Iterator<org.apache.jena.graph.Node> iterObjects(org.apache.jena.graph.Graph graph)
      List the objects in a graph (no duplicates)

    • iterSubjectsOfPredicate

      public static Iterator<org.apache.jena.graph.Node> iterSubjectsOfPredicate(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node predicate)
      List the subjects of a predicate in a graph (no duplicates)

      Use iterPO(predicate, null) for "with duplicates."

    • iterObjectsOfPredicate

      public static Iterator<org.apache.jena.graph.Node> iterObjectsOfPredicate(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node predicate)
      List the objects in a graph (no duplicates)

      Use iterSP(null, predicate) for "with duplicates."

    • nodesOfTypeAsList

      public static List<org.apache.jena.graph.Node> nodesOfTypeAsList(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node type)
      List the subjects with exactly type. See listNodesOfTypeRDFS(Graph, Node), which does include sub-classes.

    • typesOfNodeAsList

      public static List<org.apache.jena.graph.Node> typesOfNodeAsList(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node node)
      List the types of a node/subject. See listTypesOfNodeRDFS(Graph, Node), which does include super-classes.

    • nodesOfTypeAsSet

      public static Set<org.apache.jena.graph.Node> nodesOfTypeAsSet(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node type)
      Set of nodes with exactly type. See allNodesOfTypeRDFS(Graph, Node), which does include sub-classes.

    • typesOfNodeAsSet

      public static Set<org.apache.jena.graph.Node> typesOfNodeAsSet(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node node)
      Set of exact types of a node.

      See allTypesOfNodeRDFS(Graph, Node), which does include super-classes.

    • rdfList

      public static List<org.apache.jena.graph.Node> rdfList(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node node)
      Return a java list for an RDF list of data.

    • getOneOrList

      public static List<org.apache.jena.graph.Node> getOneOrList(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node node)
      Return a java list where the node is an RDF list of nodes or a single node (returned a singleton list).

    • listSubClasses

      public static List<org.apache.jena.graph.Node> listSubClasses(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node type)
      List the subclasses of a type, including itself. This is ?x rdfs:subClassOf* type. The list does not contain duplicates.

    • listSuperClasses

      public static List<org.apache.jena.graph.Node> listSuperClasses(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node type)
      List the super-classes of a type, including itself. This is type rdfs:subClassOf* ?x. The list does not contain duplicates.

    • subClasses

      public static Set<org.apache.jena.graph.Node> subClasses(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node type)
      Set of the subclasses of a type, including itself. This is ?x rdfs:subClassOf* type.

    • superClasses

      public static Set<org.apache.jena.graph.Node> superClasses(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node type)
      Set of the subclasses of a type, including itself. This is ?x rdfs:subClassOf* type.

    • listTypesOfNodeRDFS

      public static List<org.apache.jena.graph.Node> listTypesOfNodeRDFS(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node node)
      List the types of a node, following rdfs:subClassOf for super classes.

    • listNodesOfTypeRDFS

      public static List<org.apache.jena.graph.Node> listNodesOfTypeRDFS(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node type)
      List all the nodes of type, including nodes of sub-classes.

    • allTypesOfNodeRDFS

      public static Set<org.apache.jena.graph.Node> allTypesOfNodeRDFS(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node node)
      List all the types of a node, including super-classes.

    • allNodesOfTypeRDFS

      public static Set<org.apache.jena.graph.Node> allNodesOfTypeRDFS(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node type)
      List all the node of type, including considering rdfs:subClassOf

    • allSP

      public static Set<org.apache.jena.graph.Node> allSP(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate)
      Return a set of all objects for subject-predicate

    • allPO

      public static Set<org.apache.jena.graph.Node> allPO(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
      Return a set of all subjects for predicate-object

    • objectConnectiveness

      public static long objectConnectiveness(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node object)
      Count the number of in-arc to an object

    • oneConnected

      public static boolean oneConnected(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node object)
      Test whether an object has exactly one in-arc.

    • count

      public static long count(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
      Count occurrences of the pattern.

    • find

      public static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Triple> find(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object)
      Graph.find(Node, Node, Node) as a function.

    • findAll

      public static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Triple> findAll(org.apache.jena.graph.Graph graph)
      Graph.find() as a function.

    • allNonNull

      @SafeVarargs public static <X> boolean allNonNull(X... objects)
      Are all the arguments non-null?

    • exactlyOneSet

      @SafeVarargs public static <X> boolean exactlyOneSet(X... objects)
      Is one and only one argument non-null?

    • atMostOne

      @SafeVarargs public static <X> X atMostOne(X... objects)
      Is one or none of the arguments non-null?

    • countNonNulls

      @SafeVarargs public static <X> int countNonNulls(X... objects)
      Count non-nulls

    • quads2triples

      public static org.apache.jena.atlas.iterator.Iter<org.apache.jena.graph.Triple> quads2triples(Iterator<Quad> iter)
      Project quads to triples

    • quad2graphName

      public static Iterator<org.apache.jena.graph.Node> quad2graphName(Iterator<Quad> iter)
      Project quad to graph name

    • quad2subject

      public static Iterator<org.apache.jena.graph.Node> quad2subject(Iterator<Quad> iter)
      Project quad to subject

    • quad2predicate

      public static Iterator<org.apache.jena.graph.Node> quad2predicate(Iterator<Quad> iter)
      Project quad to predicate

    • quad2object

      public static Iterator<org.apache.jena.graph.Node> quad2object(Iterator<Quad> iter)
      Project quad to object

    • triple2subject

      public static Iterator<org.apache.jena.graph.Node> triple2subject(Iterator<org.apache.jena.graph.Triple> iter)
      Project triple to subject

    • triple2predicate

      public static Iterator<org.apache.jena.graph.Node> triple2predicate(Iterator<org.apache.jena.graph.Triple> iter)
      Project triple to predicate

    • triple2object

      public static Iterator<org.apache.jena.graph.Node> triple2object(Iterator<org.apache.jena.graph.Triple> iter)
      Project triple to object

    • copyGraphSrcToDst

      public static void copyGraphSrcToDst(org.apache.jena.graph.Graph src, org.apache.jena.graph.Graph dst)
      Add src to dst - assumes transaction. src and dst must not overlap. Copies "left to right" -- src into dst
      Parameters:
      src -
      dst -

    • copy

      public static org.apache.jena.graph.Graph copy(org.apache.jena.graph.Graph src)
      Creates a copy of the given graph. If the graph implements Copyable then the copy method is called. Otherwise, a new system default memory-based graph is created and the triples are copied into it.
      Parameters:
      src - the graph to copy
      Returns:
      a copy of the graph

    • clear

      public static void clear(org.apache.jena.graph.Graph graph)
      Clear graph.

    • apply

      public static void apply(org.apache.jena.graph.Graph src, Consumer<org.apache.jena.graph.Triple> action)
      Apply an action to every triple of a graph. The action must not attempt to modify the graph but it can read it.

    • apply

      public static void apply(org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Triple> iter, Consumer<org.apache.jena.graph.Triple> action)
      Apply an action to every triple of an iterator. If the iterator is attracted to a graph, the action must not attempt to modify the graph but it can read it.

    • deleteModify

      public static void deleteModify(org.apache.jena.graph.Graph modify, org.apache.jena.graph.Graph srcGraph)
      Delete triples in the graph-to-modify (arg 1) that are in the source (arg 2).
      Parameters:
      modify -
      srcGraph -

    • triples2quads

      public static org.apache.jena.atlas.iterator.Iter<Quad> triples2quads(org.apache.jena.graph.Node graphNode, Iterator<org.apache.jena.graph.Triple> iter)
      Convert an iterator of triples into quads for the specified graph name.

    • triples2quadsDftGraph

      public static org.apache.jena.atlas.iterator.Iter<Quad> triples2quadsDftGraph(Iterator<org.apache.jena.graph.Triple> iter)
      Convert an iterator of triples into quads for the default graph. This is Quad.defaultGraphIRI, not Quad.defaultGraphNodeGenerated, which is for quads outside a dataset, usually the output of parsers.

    • execTxn

      public static void execTxn(org.apache.jena.graph.Graph graph, Runnable action)
      Execute a graph transaction if the graph supports transactions else apply without a transaction wrapper.

    • calcTxn

      public static <X> X calcTxn(org.apache.jena.graph.Graph graph, Supplier<X> action)
      Execute a graph transaction and result result if the graph supports transactions else execute and return without a transaction wrapper.

    • findExec

      public static void findExec(org.apache.jena.graph.Graph graph, Consumer<org.apache.jena.graph.Triple> action, org.apache.jena.graph.Node s, org.apache.jena.graph.Node p, org.apache.jena.graph.Node o)
      Find triples and execute an action on each triple found.

    • addInto

      public static void addInto(org.apache.jena.graph.Graph dstGraph, org.apache.jena.graph.Graph srcGraph)
      Add triples into the destination (arg 1) from the source (arg 2)

    • containsBySameTerm

      public static boolean containsBySameTerm(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Triple triple)
      Test whether a graph contains by "same term", regardless of whether the graph implements "same value" or "same term".

    • containsBySameTerm

      public static boolean containsBySameTerm(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node s, org.apache.jena.graph.Node p, org.apache.jena.graph.Node o)
      Test whether a graph contains by "same term", regardless of whether the graph implements "same value" or "same term".

    • sameTermMatch

      public static boolean sameTermMatch(org.apache.jena.graph.Node matchSubj, org.apache.jena.graph.Node matchPred, org.apache.jena.graph.Node matchObj, org.apache.jena.graph.Triple dataTriple)
      Match S/P/O which can be wildcards (ANY or null), against a ground triple (even ANY and variables are considered ground terms in the data triple).

    • sameTermMatch

      public static boolean sameTermMatch(org.apache.jena.graph.Node match, org.apache.jena.graph.Node data)
      Match a node, which can be a wildcard (ANY or null) against a ground RDF Term (ANY and variables are considered ground terms in the data term). Language tags compare case-insensitively.

    • containsByLang

      public static boolean containsByLang(org.apache.jena.graph.Graph g, org.apache.jena.graph.Node s, org.apache.jena.graph.Node p, org.apache.jena.graph.Node o)
      Contains, and language tags compare case-insentively

    • findByLang

      public static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Triple> findByLang(org.apache.jena.graph.Graph g, org.apache.jena.graph.Node s, org.apache.jena.graph.Node p, org.apache.jena.graph.Node o)
      Contains, and language tags match case-insentively

    • hasLang

      public static boolean hasLang(org.apache.jena.graph.Node node)
      Test whether a node has a language tag. If the node is null or any "match" (non-concrete) node, return false.