Package org.apache.jena.sparql.expr.nodevalue

Class NodeFunctions

java.lang.Object

org.apache.jena.sparql.expr.nodevalue.NodeFunctions

public class NodeFunctions
extends java.lang.Object

Implementation of node-centric functions.

Constructor Summary

Constructors

Constructor	Description
NodeFunctions()

Method Summary

Modifier and Type	Method	Description
static Node	checkAndGetStringLiteral(java.lang.String label, NodeValue nv)	check and get a string (may be a simple literal, literal with language tag or an XSD string).
static void	checkTwoArgumentStringLiterals(java.lang.String label, NodeValue arg1, NodeValue arg2)	Check for string operations with primary first arg and second arg (e.g.
static Node	datatype(Node node)
static NodeValue	datatype(NodeValue nv)
static javax.xml.datatype.Duration	duration(int seconds)	A duration, tided
static Node	iri(Node n, java.lang.String baseIRI)	Node to Node, skolemizing, and converting strings to URIs.
static NodeValue	iri(NodeValue nv, java.lang.String baseIRI)	NodeValue to NodeValue, skolemizing, and converting strings to URIs.
static boolean	isBlank(Node node)
static NodeValue	isBlank(NodeValue nv)
static boolean	isIRI(Node node)
static NodeValue	isIRI(NodeValue nv)
static boolean	isLiteral(Node node)
static NodeValue	isLiteral(NodeValue nv)
static boolean	isURI(Node node)
static NodeValue	isURI(NodeValue nv)
static java.lang.String	lang(Node node)
static NodeValue	lang(NodeValue nv)
static boolean	langMatches(java.lang.String langStr, java.lang.String langPattern)	The algorithm for the SPARQL function "LANGMATCHES".
static NodeValue	langMatches(NodeValue nv, java.lang.String langPattern)	LANGMATCHES
static NodeValue	langMatches(NodeValue nv, NodeValue nvPattern)	LANGMATCHES
static boolean	rdfTermEquals(Node n1, Node n2)
static boolean	sameTerm(Node node1, Node node2)	sameTerm(x,y)
static NodeValue	sameTerm(NodeValue nv1, NodeValue nv2)
static NodeValue	sortKey(NodeValue nv, java.lang.String collation)
static java.lang.String	str(Node node)
static NodeValue	str(NodeValue nv)
static NodeValue	strDatatype(NodeValue v1, NodeValue v2)
static NodeValue	strLang(NodeValue v1, NodeValue v2)
static NodeValue	struuid()
static NodeValue	uuid()

Methods inherited from class java.lang.Object

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

Constructor Detail

NodeFunctions

public NodeFunctions()

Method Detail

checkAndGetStringLiteral

public static Node checkAndGetStringLiteral(java.lang.String label,
                                            NodeValue nv)

check and get a string (may be a simple literal, literal with language tag or an XSD string).

checkTwoArgumentStringLiterals

public static void checkTwoArgumentStringLiterals(java.lang.String label,
                                                  NodeValue arg1,
                                                  NodeValue arg2)

Check for string operations with primary first arg and second arg (e.g. CONTAINS). The arguments are not used in the same way and the check operation is not symmetric.

"abc"@en is compatible with "abc" "abc" is NOT compatible with "abc"@en

sameTerm

public static NodeValue sameTerm(NodeValue nv1,
                                 NodeValue nv2)

sameTerm

public static boolean sameTerm(Node node1,
                               Node node2)

sameTerm(x,y)

rdfTermEquals

public static boolean rdfTermEquals(Node n1,
                                    Node n2)

str

public static NodeValue str(NodeValue nv)

str

public static java.lang.String str(Node node)

sortKey

public static NodeValue sortKey(NodeValue nv,
                                java.lang.String collation)

datatype

public static NodeValue datatype(NodeValue nv)

datatype

public static Node datatype(Node node)

lang

public static NodeValue lang(NodeValue nv)

lang

public static java.lang.String lang(Node node)

langMatches

public static NodeValue langMatches(NodeValue nv,
                                    NodeValue nvPattern)

LANGMATCHES

Parameters:

nv - The language string

nvPattern - The pattern to match against

Returns:

Boolean nodeValue

langMatches

public static NodeValue langMatches(NodeValue nv,
                                    java.lang.String langPattern)

LANGMATCHES

Parameters:

nv - The language string

langPattern - The pattern to match against

Returns:

Boolean nodeValue

langMatches

public static boolean langMatches(java.lang.String langStr,
                                  java.lang.String langPattern)

The algorithm for the SPARQL function "LANGMATCHES". Matching in SPARQL is defined to be the language tag matching of RFC 4647, part of BCP 47.

SPARQL uses basic matching which is single "*" or a prefix of subtags.

This code does not implement extended matching correctly.

Parameters:

langStr - The language string

langPattern - The pattern to match against

Returns:

Whether there is a match.

isIRI

public static NodeValue isIRI(NodeValue nv)

isIRI

public static boolean isIRI(Node node)

isURI

public static NodeValue isURI(NodeValue nv)

isURI

public static boolean isURI(Node node)

isBlank

public static NodeValue isBlank(NodeValue nv)

isBlank

public static boolean isBlank(Node node)

isLiteral

public static NodeValue isLiteral(NodeValue nv)

isLiteral

public static boolean isLiteral(Node node)

iri

public static NodeValue iri(NodeValue nv,
                            java.lang.String baseIRI)

NodeValue to NodeValue, skolemizing, and converting strings to URIs.

iri

public static Node iri(Node n,
                       java.lang.String baseIRI)

Node to Node, skolemizing, and converting strings to URIs.

struuid

public static NodeValue struuid()

uuid

public static NodeValue uuid()

strDatatype

public static NodeValue strDatatype(NodeValue v1,
                                    NodeValue v2)

strLang

public static NodeValue strLang(NodeValue v1,
                                NodeValue v2)

duration

public static javax.xml.datatype.Duration duration(int seconds)

A duration, tided