Class SparqlBuilderUtils

java.lang.Object

org.eclipse.rdf4j.sparqlbuilder.util.SparqlBuilderUtils

public class SparqlBuilderUtils
extends Object

Utility functions for the SparqlBuilder

Field Summary

Fields

Modifier and Type	Field	Description
private static final String	PAD

Constructor Summary

Constructors

Constructor	Description
SparqlBuilderUtils()

Method Summary

Modifier and Type	Method	Description
static void	appendAndNewlineIfPresent(Optional<? extends QueryElement> elementOptional, StringBuilder builder)
static void	appendQueryElementIfPresent(Optional<? extends QueryElement> queryElementOptional, StringBuilder builder, String prefix, String suffix)
static void	appendStringIfPresent(Optional<String> stringOptional, StringBuilder builder, String prefix, String suffix)
static String	getBracedString(String contents)
static String	getBracketedString(String contents)
private static String	getEnclosedString(String open, String close, String contents)
private static String	getEnclosedString(String open, String close, String contents, boolean pad)
static String	getEscapedString(String value)	Escape the specified String value according to the SPARQL 1.1 Spec https://www.w3.org/TR/2013/REC-sparql11-query-20130321/#grammarEscapes
static String	getLongQuotedString(String contents)	For string literals that contain single- or double-quotes
static <O> Optional<O>	getOrCreateAndModifyOptional(Optional<O> optional, Supplier<O> getter, UnaryOperator<O> operator)
static String	getParenthesizedString(String contents)
static String	getQuotedString(String contents)

Methods inherited from class Object

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

Field Details

PAD

private static final String PAD

See Also:

• Constant Field Values

Constructor Details

SparqlBuilderUtils

public SparqlBuilderUtils()

Method Details

getOrCreateAndModifyOptional

public static <O> Optional<O> getOrCreateAndModifyOptional(Optional<O> optional,
 Supplier<O> getter,
 UnaryOperator<O> operator)

appendAndNewlineIfPresent

public static void appendAndNewlineIfPresent(Optional<? extends QueryElement> elementOptional,
 StringBuilder builder)

appendQueryElementIfPresent

public static void appendQueryElementIfPresent(Optional<? extends QueryElement> queryElementOptional,
 StringBuilder builder,
 String prefix,
 String suffix)

appendStringIfPresent

public static void appendStringIfPresent(Optional<String> stringOptional,
 StringBuilder builder,
 String prefix,
 String suffix)

getBracedString

public static String getBracedString(String contents)

getBracketedString

public static String getBracketedString(String contents)

getParenthesizedString

public static String getParenthesizedString(String contents)

getQuotedString

public static String getQuotedString(String contents)

getLongQuotedString

public static String getLongQuotedString(String contents)

For string literals that contain single- or double-quotes

Parameters:

contents -

Returns:

a "long quoted" string

See Also:

• RDF Literal Syntax

getEnclosedString

private static String getEnclosedString(String open,
 String close,
 String contents)

getEnclosedString

private static String getEnclosedString(String open,
 String close,
 String contents,
 boolean pad)

getEscapedString

public static String getEscapedString(String value)

Escape the specified String value according to the SPARQL 1.1 Spec https://www.w3.org/TR/2013/REC-sparql11-query-20130321/#grammarEscapes

Note that there is no special handling for Codepoint escape sequences as described by https://www.w3.org/TR/2013/REC-sparql11-query-20130321/#codepointEscape

Parameters:

value - The String to escape

Returns:

the escaped String