Package jade.content.schema

Class VariableSchema

java.lang.Object

jade.content.schema.ObjectSchema

jade.content.schema.TermSchema

jade.content.schema.VariableSchema

All Implemented Interfaces:

Serializable, Serializable

public class VariableSchema
extends TermSchema

This class represents the schema of a variable.

Author:

Federico Bergenti - Universita` di Parma

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static String	BASE_NAME
static String	NAME
static String	VALUE_TYPE

Fields inherited from class jade.content.schema.ObjectSchema

encodingByOrder, MANDATORY, OPTIONAL, UNLIMITED

Method Summary

Modifier and Type	Method	Description
protected void	add(String name, ObjectSchema slotSchema)	Add a mandatory slot to the schema.
protected void	add(String name, ObjectSchema slotSchema, int optionality)	Add a slot to the schema.
protected void	add(String name, ObjectSchema elementsSchema, int cardMin, int cardMax)	Add a slot with cardinality between cardMin and cardMax to this schema.
protected void	add(String name, ObjectSchema elementsSchema, int cardMin, int cardMax, String aggType)	Add a slot with cardinality between cardMin and cardMax to this schema and allow specifying the type of Aggregate to be used for this slot.
protected void	add(String name, ObjectSchema elementsSchema, int cardMin, int cardMax, String aggType, int optionality)	Add a slot with optionality and cardinality between cardMin and cardMax to this schema and allow specifying the type of Aggregate to be used for this slot.
protected void	addFacet(String slotName, Facet f)	Add a Facet on a slot of this schema
protected void	addSuperSchema(ObjectSchema superSchema)	Add a super schema to this schema, i.e.
boolean	containsSlot(String name)	Indicate whether a given String is the name of a slot defined in this Schema
protected boolean	descendsFrom(ObjectSchema s)	Return true if - s is the base schema for the XXXSchema class this schema is an instance of (e.g.
boolean	equals(Object o)
static ObjectSchema	getBaseSchema()	Retrieve the generic base schema for all variables.
Facet[]	getFacets(String slotName)	Retrieves the facets defined upon a slot.
String[]	getNames()	Returns the names of all the slots in this Schema (including slots defined in super schemas).
String[]	getOwnNames()	Returns the names of the slots defined in this Schema (excluding slots defined in super schemas).
ObjectSchema	getSchema(String name)	Retrieves the schema of a slot of this Schema.
ObjectSchema[]	getSuperSchemas()	Retrieves an array containing the direct super-schemas of this schema.
String	getTypeName()	Retrieves the name of the type of this schema.
boolean	isAssignableFrom(ObjectSchema s)	This method checks whether or not an abstract object that is an instance of schema s can be used in place of an abstract object that is an instance of this schema.
boolean	isCompatibleWith(ObjectSchema s)	A variable can be put wherever a term of whatever type is required --> A VariableSchema is compatible with s if s descends from TermSchema.getBaseSchema()
boolean	isMandatory(String name)	Indicate whether a slot of this schema is mandatory
boolean	isOwnSlot(String name)	Indicate whether a given String is the name of a slot actually defined in this Schema (excluding super-schemas)
AbsObject	newInstance()	Creates an Abstract descriptor to hold a variable
String	toString()
void	validate(AbsObject abs, Ontology onto)	Check whether a given abstract descriptor complies with this schema.
protected void	validateSlots(AbsObject abs, Ontology onto)	For each slot - get the corresponding attribute value from the abstract descriptor abs - Check that it is not null if the slot is mandatory - Check that its schema is compatible with the schema of the slot - Check that it is a correct abstract descriptor by validating it against its schema.

Methods inherited from class jade.content.schema.ObjectSchema

getEncodingByOrder, setEncodingByOrder

Methods inherited from class java.lang.Object

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

Field Detail

BASE_NAME

public static final String BASE_NAME

See Also:

Constant Field Values

NAME

public static final String NAME

See Also:

Constant Field Values

VALUE_TYPE

public static final String VALUE_TYPE

See Also:

Constant Field Values

Method Detail

getBaseSchema

public static ObjectSchema getBaseSchema()

Retrieve the generic base schema for all variables.

Returns:

the generic base schema for all variables.

newInstance

public AbsObject newInstance()
                      throws OntologyException

Creates an Abstract descriptor to hold a variable

Overrides:

newInstance in class TermSchema

Throws:

OntologyException

validate

public void validate(AbsObject abs,
                     Ontology onto)
              throws OntologyException

Check whether a given abstract descriptor complies with this schema.

Parameters:

abs - The abstract descriptor to be checked

Throws:

OntologyException - If the abstract descriptor does not complies with this schema

isCompatibleWith

public boolean isCompatibleWith(ObjectSchema s)

A variable can be put wherever a term of whatever type is required --> A VariableSchema is compatible with s if s descends from TermSchema.getBaseSchema()

descendsFrom

protected boolean descendsFrom(ObjectSchema s)

Return true if - s is the base schema for the XXXSchema class this schema is an instance of (e.g. s is ConceptSchema.getBaseSchema() and this schema is an instance of ConceptSchema) - s is the base schema for a super-class of the XXXSchema class this schema is an instance of (e.g. s is TermSchema.getBaseSchema() and this schema is an instance of ConceptSchema)

Overrides:

descendsFrom in class TermSchema

add

protected void add(String name,
                   ObjectSchema slotSchema,
                   int optionality)

Add a slot to the schema.

Specified by:

add in class ObjectSchema

Parameters:

name - The name of the slot.

slotSchema - The schema defining the type of the slot.

optionality - The optionality, i.e., OPTIONAL or MANDATORY

add

protected void add(String name,
                   ObjectSchema slotSchema)

Add a mandatory slot to the schema.

Specified by:

add in class ObjectSchema

Parameters:

name - name of the slot.

slotSchema - schema of the slot.

add

protected void add(String name,
                   ObjectSchema elementsSchema,
                   int cardMin,
                   int cardMax)

Add a slot with cardinality between cardMin and cardMax to this schema. Adding such a slot corresponds to add a slot of type Aggregate and then to add proper facets (constraints) to check that the type of the elements in the aggregate are compatible with elementsSchema and that the aggregate contains at least cardMin elements and at most cardMax elements. By default the Aggregate is of type BasicOntology.SEQUENCE.

Specified by:

add in class ObjectSchema

Parameters:

name - The name of the slot.

elementsSchema - The schema for the elements of this slot.

cardMin - This slot must get at least cardMin values

cardMax - This slot can get at most cardMax values

add

protected void add(String name,
                   ObjectSchema elementsSchema,
                   int cardMin,
                   int cardMax,
                   String aggType)

Add a slot with cardinality between cardMin and cardMax to this schema and allow specifying the type of Aggregate to be used for this slot.

Specified by:

add in class ObjectSchema

Parameters:

name - The name of the slot.

elementsSchema - The schema for the elements of this slot.

cardMin - This slot must get at least cardMin values

cardMax - This slot can get at most cardMax values

aggType - The type of Aggregate to be used

See Also:

ObjectSchema.add(String, ObjectSchema, int, int)

add

protected void add(String name,
                   ObjectSchema elementsSchema,
                   int cardMin,
                   int cardMax,
                   String aggType,
                   int optionality)

Add a slot with optionality and cardinality between cardMin and cardMax to this schema and allow specifying the type of Aggregate to be used for this slot.

Parameters:

name - The name of the slot.

elementsSchema - The schema for the elements of this slot.

cardMin - This slot must get at least cardMin values

cardMax - This slot can get at most cardMax values

aggType - The type of Aggregate to be used

optionality - The optionality, i.e., OPTIONAL

See Also:

ObjectSchema.add(String, ObjectSchema, int, int)

addSuperSchema

protected void addSuperSchema(ObjectSchema superSchema)

Add a super schema to this schema, i.e. this schema will inherit all characteristics from the super schema

Specified by:

addSuperSchema in class ObjectSchema

Parameters:

superSchema - the super schema.

addFacet

protected void addFacet(String slotName,
                        Facet f)
                 throws OntologyException

Add a Facet on a slot of this schema

Specified by:

addFacet in class ObjectSchema

Parameters:

slotName - the name of the slot the Facet must be added to.

f - the Facet to be added.

Throws:

OntologyException - if slotName does not identify a valid slot in this schema

getTypeName

public String getTypeName()

Retrieves the name of the type of this schema.

Specified by:

getTypeName in class ObjectSchema

Returns:

the name of the type of this schema.

getNames

public String[] getNames()

Returns the names of all the slots in this Schema (including slots defined in super schemas).

Specified by:

getNames in class ObjectSchema

Returns:

the names of all slots.

getOwnNames

public String[] getOwnNames()

Returns the names of the slots defined in this Schema (excluding slots defined in super schemas).

Specified by:

getOwnNames in class ObjectSchema

Returns:

the names of the slots defined in this Schema.

getSchema

public ObjectSchema getSchema(String name)
                       throws OntologyException

Retrieves the schema of a slot of this Schema.

Specified by:

getSchema in class ObjectSchema

Parameters:

name - The name of the slot.

Returns:

the Schema of slot name

Throws:

OntologyException - If no slot with this name is present in this schema.

containsSlot

public boolean containsSlot(String name)

Indicate whether a given String is the name of a slot defined in this Schema

Specified by:

containsSlot in class ObjectSchema

Parameters:

name - The String to test.

Returns:

true if name is the name of a slot defined in this Schema.

isOwnSlot

public boolean isOwnSlot(String name)

Indicate whether a given String is the name of a slot actually defined in this Schema (excluding super-schemas)

Specified by:

isOwnSlot in class ObjectSchema

Parameters:

name - The String to test.

Returns:

true if name is the name of a slot actually defined in this Schema (excluding super-schemas).

isMandatory

public boolean isMandatory(String name)
                    throws OntologyException

Indicate whether a slot of this schema is mandatory

Specified by:

isMandatory in class ObjectSchema

Parameters:

name - The name of the slot.

Returns:

true if the slot is mandatory.

Throws:

OntologyException - If no slot with this name is present in this schema.

validateSlots

protected void validateSlots(AbsObject abs,
                             Ontology onto)
                      throws OntologyException

For each slot - get the corresponding attribute value from the abstract descriptor abs - Check that it is not null if the slot is mandatory - Check that its schema is compatible with the schema of the slot - Check that it is a correct abstract descriptor by validating it against its schema.

Throws:

OntologyException

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

getSuperSchemas

public ObjectSchema[] getSuperSchemas()

Description copied from class: ObjectSchema

Retrieves an array containing the direct super-schemas of this schema. If this schema has no super-schema an empty array is returned

Specified by:

getSuperSchemas in class ObjectSchema

Returns:

an array containing the direct super-schemas of this schema.

getFacets

public Facet[] getFacets(String slotName)

Description copied from class: ObjectSchema

Retrieves the facets defined upon a slot. More in details this method returns all facets defined in this schema plus all facets defined in super-schemas up to the schema actually declaring the given slot.

Specified by:

getFacets in class ObjectSchema

Parameters:

slotName - the name of the slot

Returns:

the facets defined upon a slot or null if the specified slot is not found.

isAssignableFrom

public boolean isAssignableFrom(ObjectSchema s)

Description copied from class: ObjectSchema

This method checks whether or not an abstract object that is an instance of schema s can be used in place of an abstract object that is an instance of this schema. Note that unlike the method isCompatibleWith() that perform "ontological" checks (i.e. they are related to the reference ontology), this method only performs a structural check on the slots regardless of the fact that the two schemas belong to the same ontology or not.

Specified by:

isAssignableFrom in class ObjectSchema