Class Expression<T extends Expression<T>>

java.lang.Object

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

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, Function, NotIn, Operation

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	Description
protected SparqlOperator	operator
private static final Function<String,String>	WRAPPER

Fields inherited from class QueryElementCollection

elements

Constructor Summary

Constructors

Constructor	Description
Expression(SparqlOperator operator)
Expression(SparqlOperator operator, String delimeter)

Method Summary

Modifier and Type	Method	Description
(package private) T	addOperand(Operand... operands)
(package private) Operand	getOperand(int index)
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 StandardQueryElementCollection

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

Methods inherited from class QueryElementCollection

addElements, addElements, isEmpty

Methods inherited from class Object

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

Methods inherited from interface Assignable

as

Methods inherited from interface Orderable

asc, desc

Methods inherited from interface QueryElement

getQueryString

Field Details

WRAPPER

private static final Function<String,String> WRAPPER

operator

protected SparqlOperator operator

Constructor Details

Expression

Expression(SparqlOperator operator)

Expression

Expression(SparqlOperator operator,
 String delimeter)

Method Details

addOperand

T addOperand(Operand... operands)

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

getOperand

Operand getOperand(int index)