org.aksw.commons.jena.util
Class ExprUtils

java.lang.Object
  org.aksw.commons.jena.util.ExprUtils

public class ExprUtils
extends Object

Author:

Claus Stadler

Date: 1/8/12 Time: 6:18 PM

Constructor Summary

ExprUtils()

Method Summary

static com.hp.hpl.jena.sparql.expr.Expr	andifyBalanced(com.hp.hpl.jena.sparql.expr.Expr... exprs)
static com.hp.hpl.jena.sparql.expr.Expr	andifyBalanced(Iterable<com.hp.hpl.jena.sparql.expr.Expr> exprs)
static Pair<com.hp.hpl.jena.sparql.core.Var,com.hp.hpl.jena.sparql.expr.NodeValue>	extractConstantConstraint(com.hp.hpl.jena.sparql.expr.Expr expr)
static Pair<com.hp.hpl.jena.sparql.core.Var,com.hp.hpl.jena.sparql.expr.NodeValue>	extractConstantConstraint(com.hp.hpl.jena.sparql.expr.Expr a, com.hp.hpl.jena.sparql.expr.Expr b)
static Pair<com.hp.hpl.jena.sparql.core.Var,com.hp.hpl.jena.sparql.expr.NodeValue>	extractConstantConstraintDirected(com.hp.hpl.jena.sparql.expr.Expr a, com.hp.hpl.jena.sparql.expr.Expr b) If a is a variable and b is a constant, then a mapping of the variable to the constant is put into the map, and true is returned.
static List<String>	extractNames(Collection<com.hp.hpl.jena.sparql.core.Var> vars)
static Collection<? extends com.hp.hpl.jena.sparql.expr.Expr>	getSubExpressions(com.hp.hpl.jena.sparql.expr.Expr expr, boolean reflexive)
static void	getSubExpressions(com.hp.hpl.jena.sparql.expr.Expr expr, Set<com.hp.hpl.jena.sparql.expr.Expr> result)
static <T> T	opifyBalanced(Iterable<T> exprs, Factory2<T> exprFactory) Concatenates the sub exressions using Logical_And and(and(0, 1), and(2, 3))
static com.hp.hpl.jena.sparql.expr.Expr	orifyBalanced(com.hp.hpl.jena.sparql.expr.Expr... exprs)
static com.hp.hpl.jena.sparql.expr.Expr	orifyBalanced(Iterable<com.hp.hpl.jena.sparql.expr.Expr> exprs)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExprUtils

public ExprUtils()

Method Detail

andifyBalanced

public static com.hp.hpl.jena.sparql.expr.Expr andifyBalanced(com.hp.hpl.jena.sparql.expr.Expr... exprs)

orifyBalanced

public static com.hp.hpl.jena.sparql.expr.Expr orifyBalanced(com.hp.hpl.jena.sparql.expr.Expr... exprs)

extractNames

public static List<String> extractNames(Collection<com.hp.hpl.jena.sparql.core.Var> vars)

andifyBalanced

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

opifyBalanced

public static <T> T opifyBalanced(Iterable<T> exprs,
                                  Factory2<T> exprFactory)

Concatenates the sub exressions using Logical_And and(and(0, 1), and(2, 3))

Parameters:

exprs -

Returns:

orifyBalanced

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

extractConstantConstraint

public static Pair<com.hp.hpl.jena.sparql.core.Var,com.hp.hpl.jena.sparql.expr.NodeValue> extractConstantConstraint(com.hp.hpl.jena.sparql.expr.Expr expr)

extractConstantConstraint

public static Pair<com.hp.hpl.jena.sparql.core.Var,com.hp.hpl.jena.sparql.expr.NodeValue> extractConstantConstraint(com.hp.hpl.jena.sparql.expr.Expr a,
                                                                                                                    com.hp.hpl.jena.sparql.expr.Expr b)

extractConstantConstraintDirected

public static Pair<com.hp.hpl.jena.sparql.core.Var,com.hp.hpl.jena.sparql.expr.NodeValue> extractConstantConstraintDirected(com.hp.hpl.jena.sparql.expr.Expr a,
                                                                                                                            com.hp.hpl.jena.sparql.expr.Expr b)

If a is a variable and b is a constant, then a mapping of the variable to the constant is put into the map, and true is returned. Otherwise, nothing is changed, and false is returned. A mapping of a variable is set to null, if it is mapped to multiple constants

Parameters:

a -

b -

Returns:

getSubExpressions

public static Collection<? extends com.hp.hpl.jena.sparql.expr.Expr> getSubExpressions(com.hp.hpl.jena.sparql.expr.Expr expr,
                                                                                       boolean reflexive)

getSubExpressions

public static void getSubExpressions(com.hp.hpl.jena.sparql.expr.Expr expr,
                                     Set<com.hp.hpl.jena.sparql.expr.Expr> result)