org.eclipse.rdf4j.sparqlbuilder.core

Class QueryElementCollection<T extends QueryElement>

java.lang.Object

org.eclipse.rdf4j.sparqlbuilder.core.QueryElementCollection<T>

Type Parameters:

T - the type of QueryElements in the collection

All Implemented Interfaces:

QueryElement

Direct Known Subclasses:

Projection, RdfPredicateObjectListCollection, StandardQueryElementCollection

public abstract class QueryElementCollection<T extends QueryElement>
extends Object
implements QueryElement

A logical collection of query elements. Provides common functionality for elements which are collections of other elements, especially in printing. Would have loved to have avoided making this public.

Field Summary

Fields

Modifier and Type	Field and Description
protected Collection<T>	elements

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	QueryElementCollection()
protected	QueryElementCollection(String delimiter)
protected	QueryElementCollection(String delimiter, Collection<T> elements)

Method Summary

Modifier and Type	Method and Description
protected <O> void	addElements(java.util.function.Function<? super O,? extends T> mapper, O... os)
protected void	addElements(T... queryElements)
String	getQueryString()
boolean	isEmpty()

Methods inherited from class java.lang.Object

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

Field Detail

elements

protected Collection<T extends QueryElement> elements

Constructor Detail

QueryElementCollection

protected QueryElementCollection()

QueryElementCollection

protected QueryElementCollection(String delimiter)

QueryElementCollection

protected QueryElementCollection(String delimiter,
                                 Collection<T> elements)

Method Detail

isEmpty

public boolean isEmpty()

Returns:

if this collection is empty

addElements

protected void addElements(T... queryElements)

addElements

protected <O> void addElements(java.util.function.Function<? super O,? extends T> mapper,
                               O... os)

getQueryString

public String getQueryString()

Specified by:

getQueryString in interface QueryElement

Returns:

the String representing the SPARQL syntax of this element