org.aksw.sparqlify.algebra.sparql.transform

Class ExprStructuralHash

java.lang.Object

org.aksw.sparqlify.algebra.sparql.transform.ExprStructuralHash

public class ExprStructuralHash
extends Object

Compares Expressions that are structurally equivalent, except for the variable names (the datatypes of the variables must be compatible; i.e. there is a common datatype for them (e.g. int(8), int(16) -> int(32)) Examples concat('test', ?a : String) = concat('test', ?b : String) Not equivalent concat('test', ?a : Integer) = concat('test', ?b : String) concat('test', ?a) = concat('foo', ?b)

Author:

raven

Constructor Summary

Constructors

Constructor and Description
ExprStructuralHash()

Method Summary

Methods

Modifier and Type	Method and Description
static int	_hash(com.hp.hpl.jena.sparql.expr.ExprFunction expr, Map<String,SqlDatatype> columnToDatatype)
static int	_hash(com.hp.hpl.jena.sparql.expr.ExprVar expr, Map<String,SqlDatatype> columnToDatatype)
static int	_hash(com.hp.hpl.jena.sparql.expr.NodeValue expr, Map<String,SqlDatatype> columnToDatatype)
static int	_hashArgs(Iterable<com.hp.hpl.jena.sparql.expr.Expr> exprs, Map<String,SqlDatatype> columnToDatatype)
static int	hash(com.hp.hpl.jena.sparql.expr.Expr expr, Map<String,SqlDatatype> columnToDatatype)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExprStructuralHash

public ExprStructuralHash()

Method Detail

hash

public static int hash(com.hp.hpl.jena.sparql.expr.Expr expr,
       Map<String,SqlDatatype> columnToDatatype)

_hashArgs

public static int _hashArgs(Iterable<com.hp.hpl.jena.sparql.expr.Expr> exprs,
            Map<String,SqlDatatype> columnToDatatype)

_hash

public static int _hash(com.hp.hpl.jena.sparql.expr.ExprFunction expr,
        Map<String,SqlDatatype> columnToDatatype)

_hash

public static int _hash(com.hp.hpl.jena.sparql.expr.ExprVar expr,
        Map<String,SqlDatatype> columnToDatatype)

_hash

public static int _hash(com.hp.hpl.jena.sparql.expr.NodeValue expr,
        Map<String,SqlDatatype> columnToDatatype)