it.unibz.inf.ontop.dbschema

Class Attribute

java.lang.Object

it.unibz.inf.ontop.dbschema.Attribute

public class Attribute
extends Object

Represents an attribute (column) of a database relation (table or view) or a parser view

Author:

Roman Kontchakov

Method Summary

Modifier and Type	Method and Description
boolean	canNull()
boolean	equals(Object obj)
DBTermType	getBaseTypeForValidation() May be an abstract term type if no precise term type is defined.
QuotedID	getID()
int	getIndex()
QualifiedAttributeID	getQualifiedID()
RelationDefinition	getRelation()
String	getSQLTypeName() Returns the name of the SQL type associated with this attribute.
Optional<DBTermType>	getTermType() Returns the precise term type (if defined)
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

getID

public QuotedID getID()

getQualifiedID

public QualifiedAttributeID getQualifiedID()

getRelation

public RelationDefinition getRelation()

getIndex

public int getIndex()

canNull

public boolean canNull()

getSQLTypeName

public String getSQLTypeName()

Returns the name of the SQL type associated with this attribute. Note, the name maybe not match the integer SQL id. The integer SQL id comes from the Types class, and these are few. Often databases match extra datatypes they may provide to the same ID, e.g., in MySQL YEAR (which doesn't exists in standard SQL, is mapped to 91, the ID of DATE. This field helps in disambiguating this cases.

Returns:

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

getTermType

public Optional<DBTermType> getTermType()

Returns the precise term type (if defined)

getBaseTypeForValidation

public DBTermType getBaseTypeForValidation()

May be an abstract term type if no precise term type is defined. Intended to be used for VALIDATION ONLY, not for type inference.