Package org.eclipse.rdf4j.query.parser.sparql

Class SPARQLQueries

  • Direct Known Subclasses:
    SPARQLUtil
    public class SPARQLQueries
extends Object
    Utility functions for working with SPARQL query strings.
    Author:
    Jeen Broekstra

    • Constructor Detail

      • SPARQLQueries

        public SPARQLQueries()

    • Method Detail

      • getPrefixClauses

        public static String getPrefixClauses​(Iterable<Namespace> namespaces)
        Creates a string representing of the supplied namespaces as SPARQL prefix declarations. This can be used when composing a SPARQL query string in code, for example: 
         
 String query = SPARQLQueries.getPrefixClauses(connection.getNamespaces()) + "SELECT * WHERE { ?s ex:myprop ?o }";
        Parameters:
        namespaces - one or more Namespace objects.
        Returns:
        one or more SPARQL prefix declarations (each separated by a newline), as a String.
        Since:
        3.6.0

      • escape

        public static String escape​(String s)
        Escape the supplied string with backslashes for any special characters, so it can be used as a string literal value in a SPARQL query.
        Since:
        3.6.0
        See Also:
        SPAQL 1.1 grammar escapes

      • unescape

        public static String unescape​(String s)
        Un-escapes a backslash-escaped SPARQL literal value string. Any recognized \-escape sequences are substituted with their un-escaped value.
        Parameters:
        s - An SPARQL literal string with backslash escapes.
        Returns:
        The un-escaped string.
        Throws:
        IllegalArgumentException - If the supplied string is not a correctly escaped SPARQL string.
        Since:
        3.6.0
        See Also:
        SPAQL 1.1 grammar escapes