org.apache.jena.arq.querybuilder.clauses

Interface SelectClause<T extends AbstractQueryBuilder<T>>

Type Parameters:

T - The Builder type that the clause is part of.

All Known Implementing Classes:

DescribeBuilder, SelectBuilder

public interface SelectClause<T extends AbstractQueryBuilder<T>>

Interface that defines the SelectClause as per http://www.w3.org/TR/2013/REC-sparql11-query-20130321/#rSelectClause

Method Summary

Modifier and Type	Method and Description
T	addVar(Expr expr, Object var) Adds an expression as variable to the select statement.
T	addVar(Object var) Adds a variable to the select clause.
T	addVar(String expr, Object var) Adds an expression as variable to the select statement.
SelectHandler	getSelectHandler() Returns the select handler for this clause
List<Var>	getVars()

Method Detail

getSelectHandler

SelectHandler getSelectHandler()

Returns the select handler for this clause

Returns:

The SelectHandler that the clause is using

addVar

T addVar(Object var)

Adds a variable to the select clause. A variable may only be added once. Attempting to add the same variable multiple times will be silently ignored.

Parameters:

var - The variable to add.

Returns:

This builder for chaining.

addVar

T addVar(Expr expr,
         Object var)

Adds an expression as variable to the select statement. Creates an '(Expression as Var)' to the select statement. A variable may only be added once. Attempting to add the same variable multiple times will be silently ignored.

Parameters:

expr - The expression to be added

var - The variable to add.

Returns:

This builder for chaining.

addVar

T addVar(String expr,
         Object var)
  throws ParseException

Adds an expression as variable to the select statement. Creates an '(Expression as Var)' to the select statement. A variable may only be added once. Attempting to add the same variable multiple times will be silently ignored.

Parameters:

expr - The expression to be added

var - The variable to add.

Returns:

This builder for chaining.

Throws:

ParseException - If the expression can not be parsed.

getVars

List<Var> getVars()

Returns:

A list of all the variables that have been added.