it.unibz.inf.ontop.dbschema

Class UniqueConstraint

java.lang.Object

it.unibz.inf.ontop.dbschema.UniqueConstraint

All Implemented Interfaces:

FunctionalDependency

public class UniqueConstraint
extends Object
implements FunctionalDependency

Primary key or a unique constraint
PRIMARY KEY (columnName (, columnName)*)
UNIQUE (columnName (, columnName)*)
(a form of equality-generating dependencies)

Author:

Roman Kontchakov

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	UniqueConstraint.Builder

Method Summary

Modifier and Type	Method and Description
static UniqueConstraint.Builder	builder(DatabaseRelationDefinition relation) creates a UNIQUE constraint builder (which is also used for a PRIMARY KET builder)
com.google.common.collect.ImmutableList<Attribute>	getAttributes() return the list of attributes in the unique constraint
com.google.common.collect.ImmutableSet<Attribute>	getDependents()
com.google.common.collect.ImmutableSet<Attribute>	getDeterminants()
String	getName() return the name of the constraint
DatabaseRelationDefinition	getRelation() return the database relation for the unique constraint
boolean	isPrimaryKey() return true if it is a primary key and false otherwise
static UniqueConstraint	primaryKeyOf(Attribute att)
static UniqueConstraint	primaryKeyOf(Attribute att, Attribute att2)
String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface it.unibz.inf.ontop.dbschema.FunctionalDependency

defaultBuilder

Method Detail

primaryKeyOf

public static UniqueConstraint primaryKeyOf(Attribute att)

primaryKeyOf

public static UniqueConstraint primaryKeyOf(Attribute att,
                                            Attribute att2)

builder

public static UniqueConstraint.Builder builder(DatabaseRelationDefinition relation)

creates a UNIQUE constraint builder (which is also used for a PRIMARY KET builder)

Parameters:

relation -

Returns:

getName

public String getName()

return the name of the constraint

Returns:

name

getRelation

public DatabaseRelationDefinition getRelation()

return the database relation for the unique constraint

Returns:

isPrimaryKey

public boolean isPrimaryKey()

return true if it is a primary key and false otherwise

Returns:

true if it is a primary key constraint (false otherwise)

getAttributes

public com.google.common.collect.ImmutableList<Attribute> getAttributes()

return the list of attributes in the unique constraint

Returns:

list of attributes

getDeterminants

public com.google.common.collect.ImmutableSet<Attribute> getDeterminants()

Specified by:

getDeterminants in interface FunctionalDependency

getDependents

public com.google.common.collect.ImmutableSet<Attribute> getDependents()

Specified by:

getDependents in interface FunctionalDependency

toString

public String toString()

Overrides:

toString in class Object