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

Class SPARQLQueries

java.lang.Object

org.eclipse.rdf4j.query.parser.sparql.SPARQLQueries

public class SPARQLQueries
extends Object

Utility functions for working with SPARQL query strings.

Author:

Jeen Broekstra

Constructor Summary

Constructors

Constructor	Description
SPARQLQueries()

Method Summary

Modifier and Type	Method	Description
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.
static String	getPrefixClauses(Iterable<Namespace> namespaces)	Creates a string representing of the supplied namespaces as SPARQL prefix declarations.
static String	unescape(String s)	Un-escapes a backslash-escaped SPARQL literal value string.

Methods inherited from class java.lang.Object

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

Constructor Details

SPARQLQueries

public SPARQLQueries()

Method Details

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