/**
* ***************************************************************
* JADE - Java Agent DEvelopment Framework is a framework to develop
* multi-agent systems in compliance with the FIPA specifications.
* Copyright (C) 2000 CSELT S.p.A.
*
* GNU Lesser General Public License
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation,
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
* **************************************************************
*/
package jade.content.schema.facets;
import jade.content.onto.*;
import jade.content.schema.*;
import jade.content.abs.*;
import jade.util.leap.Iterator;
/**
* This facet forces the elements in an AbsAggregate
* to be compliant to a given schema.
* @author Giovanni Caire - TILAB
*/
public class TypedAggregateFacet implements Facet {
private ObjectSchema type;
/**
Construct a <code>TypedAggregateFacet</code> that forces
the elements in an AbsAggregate to be instances of a given
schema
*/
public TypedAggregateFacet(ObjectSchema s) {
type = s;
}
/**
Get the schema associated to this facet
*/
public ObjectSchema getType() {
return type;
}
/**
Check whether a given value for the slot this Facet applies
to is valid.
@param value The value to be checked
@throws OntologyException If the value is not valid
*/
public void validate(AbsObject value, Ontology onto) throws OntologyException {
if (value instanceof AbsVariable) {
// A variable can always be used where whatever term is required
return;
}
if (!(value instanceof AbsAggregate)) {
throw new OntologyException(value+" is not an AbsAggregate");
}
AbsAggregate agg = (AbsAggregate) value;
Iterator it = agg.iterator();
while (it.hasNext()) {
AbsTerm el = (AbsTerm) it.next();
ObjectSchema s = onto.getSchema(el.getTypeName());
if (!s.isCompatibleWith(type)) {
throw new OntologyException("Schema "+s+" for element "+el+" is not compatible with type "+type);
}
}
}
}