org.aksw.sparqlify.core.transformations

Class ExprEvaluatorPartial

java.lang.Object

org.aksw.sparqlify.core.transformations.ExprEvaluatorPartial

All Implemented Interfaces:

ExprEvaluator

public class ExprEvaluatorPartial
extends Object
implements ExprEvaluator

Evaluator for expressions. Transforms SPARQL expressions so that they can be translated to SQL. Concretely, this class attempts to remove all type constructors from the expressions. If not all of an expressions' variables are bound, it tries to evaluate as much as possible; hence the name "partial" evaluator.

Author:

Claus Stadler

Constructor Summary

Constructors

Constructor and Description
ExprEvaluatorPartial(com.hp.hpl.jena.sparql.function.FunctionRegistry registry) The evaluator must be called AFTER the expression was transformed to be term-ctor free Bullshit below.

Method Summary

Methods

Modifier and Type	Method and Description
com.hp.hpl.jena.sparql.expr.Expr	eval(com.hp.hpl.jena.sparql.expr.ExprFunction fn, Map<com.hp.hpl.jena.sparql.core.Var,com.hp.hpl.jena.sparql.expr.Expr> binding)
com.hp.hpl.jena.sparql.expr.Expr	eval(com.hp.hpl.jena.sparql.expr.Expr expr, Map<com.hp.hpl.jena.sparql.core.Var,com.hp.hpl.jena.sparql.expr.Expr> binding)
static boolean	isConstantArgsOnly(com.hp.hpl.jena.sparql.expr.ExprFunction fn)
static boolean	isConstantsOnly(Iterable<com.hp.hpl.jena.sparql.expr.Expr> exprs)
com.hp.hpl.jena.sparql.expr.Expr	transform(com.hp.hpl.jena.sparql.expr.Expr expr)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExprEvaluatorPartial

public ExprEvaluatorPartial(com.hp.hpl.jena.sparql.function.FunctionRegistry registry)

The evaluator must be called AFTER the expression was transformed to be term-ctor free Bullshit below. ---The transformer is called AFTER all of a functions arguments have been evaluated.

Method Detail

isConstantsOnly

public static boolean isConstantsOnly(Iterable<com.hp.hpl.jena.sparql.expr.Expr> exprs)

isConstantArgsOnly

public static boolean isConstantArgsOnly(com.hp.hpl.jena.sparql.expr.ExprFunction fn)

eval

public com.hp.hpl.jena.sparql.expr.Expr eval(com.hp.hpl.jena.sparql.expr.ExprFunction fn,
                                    Map<com.hp.hpl.jena.sparql.core.Var,com.hp.hpl.jena.sparql.expr.Expr> binding)

eval

public com.hp.hpl.jena.sparql.expr.Expr eval(com.hp.hpl.jena.sparql.expr.Expr expr,
                                    Map<com.hp.hpl.jena.sparql.core.Var,com.hp.hpl.jena.sparql.expr.Expr> binding)

Specified by:

eval in interface ExprEvaluator

transform

public com.hp.hpl.jena.sparql.expr.Expr transform(com.hp.hpl.jena.sparql.expr.Expr expr)

Specified by:

transform in interface ExprEvaluator