org.eclipse.rdf4j.sparqlbuilder.constraint

Class Expression<T extends Expression<T>>

java.lang.Object

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

org.eclipse.rdf4j.sparqlbuilder.core.StandardQueryElementCollection<Operand>

org.eclipse.rdf4j.sparqlbuilder.constraint.Expression<T>

Type Parameters:

T - the type of Expression (ie, Function or Operation). Used to support fluency

All Implemented Interfaces:

Operand, Assignable, Groupable, Orderable, QueryElement

Direct Known Subclasses:

Aggregate, CustomFunction

public abstract class Expression<T extends Expression<T>>
extends StandardQueryElementCollection<Operand>
implements Operand, Orderable, Groupable, Assignable

A SPARQL expression. Used by filters, having clauses, order and group by clauses, assignments, and as arguments to other expressions.

See Also:

SPARQL Filters
SPARQL HAVING
SPARQL ORDER BY
SPARQL GROUP BY
SPARQL Assignments

Field Summary

Fields

Modifier and Type	Field and Description
protected SparqlOperator	operator

Fields inherited from class org.eclipse.rdf4j.sparqlbuilder.core.QueryElementCollection

elements

Method Summary

Modifier and Type	Method and Description
T	parenthesize() Indicate that this expression should be wrapped in parentheses when converted to a query string
T	parenthesize(boolean parenthesize) Indicate if this expression should be wrapped in parentheses when converted to a query string

Methods inherited from class org.eclipse.rdf4j.sparqlbuilder.core.StandardQueryElementCollection

getQueryString, printBodyIfEmpty, printNameIfEmpty, resetWrapperMethod, setOperatorName, setOperatorName, setWrapperMethod

Methods inherited from class org.eclipse.rdf4j.sparqlbuilder.core.QueryElementCollection

addElements, addElements, isEmpty

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.rdf4j.sparqlbuilder.core.Orderable

asc, desc

Methods inherited from interface org.eclipse.rdf4j.sparqlbuilder.core.Assignable

as

Methods inherited from interface org.eclipse.rdf4j.sparqlbuilder.core.QueryElement

getQueryString

Field Detail

operator

protected SparqlOperator operator

Method Detail

parenthesize

public T parenthesize()

Indicate that this expression should be wrapped in parentheses when converted to a query string

Returns:

this

parenthesize

public T parenthesize(boolean parenthesize)

Indicate if this expression should be wrapped in parentheses when converted to a query string

Parameters:

parenthesize -

Returns:

this