it.unibz.inf.ontop.spec.mapping.parser.impl

Class RAExpression

java.lang.Object

it.unibz.inf.ontop.spec.mapping.parser.impl.RAExpression

public class RAExpression
extends Object

Created by Roman Kontchakov on 01/11/2016.

Constructor Summary

Constructors

Constructor and Description
RAExpression(com.google.common.collect.ImmutableList<it.unibz.inf.ontop.model.atom.DataAtom<it.unibz.inf.ontop.model.atom.RelationPredicate>> dataAtoms, com.google.common.collect.ImmutableList<it.unibz.inf.ontop.model.term.ImmutableExpression> filterAtoms, RAExpressionAttributes attributes) constructs a relation expression

Method Summary

Modifier and Type	Method and Description
static RAExpression	alias(RAExpression re, RelationID alias) (relational expression) AS A
static RAExpression	crossJoin(RAExpression re1, RAExpression re2) CROSS JOIN (also denoted by , in SQL)
com.google.common.collect.ImmutableMap<QualifiedAttributeID,it.unibz.inf.ontop.model.term.ImmutableTerm>	getAttributes()
com.google.common.collect.ImmutableList<it.unibz.inf.ontop.model.atom.DataAtom<it.unibz.inf.ontop.model.atom.RelationPredicate>>	getDataAtoms()
com.google.common.collect.ImmutableList<it.unibz.inf.ontop.model.term.ImmutableExpression>	getFilterAtoms()
static RAExpression	joinOn(RAExpression re1, RAExpression re2, Function<com.google.common.collect.ImmutableMap<QualifiedAttributeID,it.unibz.inf.ontop.model.term.ImmutableTerm>,com.google.common.collect.ImmutableList<it.unibz.inf.ontop.model.term.ImmutableExpression>> getAtomOnExpression) JOIN ON
static RAExpression	joinUsing(RAExpression re1, RAExpression re2, com.google.common.collect.ImmutableSet<QuotedID> using, it.unibz.inf.ontop.model.term.TermFactory termFactory) JOIN USING
static RAExpression	naturalJoin(RAExpression re1, RAExpression re2, it.unibz.inf.ontop.model.term.TermFactory termFactory) NATURAL JOIN
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

RAExpression

public RAExpression(com.google.common.collect.ImmutableList<it.unibz.inf.ontop.model.atom.DataAtom<it.unibz.inf.ontop.model.atom.RelationPredicate>> dataAtoms,
                    com.google.common.collect.ImmutableList<it.unibz.inf.ontop.model.term.ImmutableExpression> filterAtoms,
                    RAExpressionAttributes attributes)

constructs a relation expression

Parameters:

dataAtoms - an ImmutableList<Function>

filterAtoms - an ImmutableList<Function>

attributes - an RAExpressionAttributes

Method Detail

getDataAtoms

public com.google.common.collect.ImmutableList<it.unibz.inf.ontop.model.atom.DataAtom<it.unibz.inf.ontop.model.atom.RelationPredicate>> getDataAtoms()

getFilterAtoms

public com.google.common.collect.ImmutableList<it.unibz.inf.ontop.model.term.ImmutableExpression> getFilterAtoms()

getAttributes

public com.google.common.collect.ImmutableMap<QualifiedAttributeID,it.unibz.inf.ontop.model.term.ImmutableTerm> getAttributes()

crossJoin

public static RAExpression crossJoin(RAExpression re1,
                                     RAExpression re2)
                              throws IllegalJoinException

CROSS JOIN (also denoted by , in SQL)

Parameters:

re1 - a RAExpression

re2 - a RAExpression

Returns:

a RAExpression

Throws:

IllegalJoinException - if the same alias occurs in both arguments

joinOn

public static RAExpression joinOn(RAExpression re1,
                                  RAExpression re2,
                                  Function<com.google.common.collect.ImmutableMap<QualifiedAttributeID,it.unibz.inf.ontop.model.term.ImmutableTerm>,com.google.common.collect.ImmutableList<it.unibz.inf.ontop.model.term.ImmutableExpression>> getAtomOnExpression)
                           throws IllegalJoinException

JOIN ON

Parameters:

re1 - a RAExpression

re2 - a RAExpression

getAtomOnExpression -

Returns:

a RAExpression

Throws:

IllegalJoinException - if the same alias occurs in both arguments

naturalJoin

public static RAExpression naturalJoin(RAExpression re1,
                                       RAExpression re2,
                                       it.unibz.inf.ontop.model.term.TermFactory termFactory)
                                throws IllegalJoinException

NATURAL JOIN

Parameters:

re1 - a RAExpression

re2 - a RAExpression

Returns:

a RAExpression

Throws:

IllegalJoinException - if the same alias occurs in both arguments or one of the shared attributes is ambiguous

joinUsing

public static RAExpression joinUsing(RAExpression re1,
                                     RAExpression re2,
                                     com.google.common.collect.ImmutableSet<QuotedID> using,
                                     it.unibz.inf.ontop.model.term.TermFactory termFactory)
                              throws IllegalJoinException

JOIN USING

Parameters:

re1 - a RAExpression

re2 - a RAExpression

using - a ImmutableSet<QuotedID>

Returns:

a RAExpression

Throws:

IllegalJoinException - if the same alias occurs in both arguments or one of the `using' attributes is ambiguous or absent

alias

public static RAExpression alias(RAExpression re,
                                 RelationID alias)

(relational expression) AS A

Parameters:

re - a RAExpression

alias - a QuotedID

Returns:

a RAExpression

toString

public String toString()

Overrides:

toString in class Object