/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.stanbol.rules.adapters.clerezza.atoms;
import org.apache.clerezza.commons.rdf.Literal;
import org.apache.clerezza.commons.rdf.IRI;
import org.apache.clerezza.rdf.core.sparql.query.ConstructQuery;
import org.apache.clerezza.rdf.core.sparql.query.LiteralExpression;
import org.apache.clerezza.rdf.core.sparql.query.ResourceOrVariable;
import org.apache.clerezza.rdf.core.sparql.query.UriRefOrVariable;
import org.apache.clerezza.rdf.core.sparql.query.Variable;
import org.apache.clerezza.rdf.core.sparql.query.impl.SimpleTriplePattern;
import org.apache.stanbol.rules.adapters.AbstractAdaptableAtom;
import org.apache.stanbol.rules.adapters.clerezza.ClerezzaSparqlObject;
import org.apache.stanbol.rules.base.api.RuleAtom;
import org.apache.stanbol.rules.base.api.RuleAtomCallExeption;
import org.apache.stanbol.rules.base.api.UnavailableRuleObjectException;
import org.apache.stanbol.rules.base.api.UnsupportedTypeForExportException;
import org.apache.stanbol.rules.manager.atoms.IObjectAtom;
/**
* It adapts any DatavaluedPropertyAtom to a simple triple pattern in Clerezza.
*
* @author anuzzolese
*
*/
public class DatavaluedPropertyAtom extends AbstractAdaptableAtom {
@SuppressWarnings("unchecked")
@Override
public <T> T adapt(RuleAtom ruleAtom) throws RuleAtomCallExeption,
UnavailableRuleObjectException,
UnsupportedTypeForExportException {
org.apache.stanbol.rules.manager.atoms.DatavaluedPropertyAtom tmp = (org.apache.stanbol.rules.manager.atoms.DatavaluedPropertyAtom) ruleAtom;
IObjectAtom argument1 = tmp.getArgument1();
IObjectAtom datatypeProperty = tmp.getDatatypeProperty();
RuleAtom argument2 = tmp.getArgument2();
ClerezzaSparqlObject argument1CSO = (ClerezzaSparqlObject) adapter.adaptTo(argument1,
ConstructQuery.class);
ClerezzaSparqlObject datatypePropertyCSO = (ClerezzaSparqlObject) adapter.adaptTo(datatypeProperty,
ConstructQuery.class);
ClerezzaSparqlObject argument2CSO = (ClerezzaSparqlObject) adapter.adaptTo(argument2,
ConstructQuery.class);
Object arg1 = argument1CSO.getClerezzaObject();
Object dt = datatypePropertyCSO.getClerezzaObject();
Object arg2 = argument2CSO.getClerezzaObject();
UriRefOrVariable subject;
UriRefOrVariable predicate;
ResourceOrVariable object;
if (arg1 instanceof Variable) {
subject = new UriRefOrVariable((Variable) arg1);
} else if (arg1 instanceof IRI) {
subject = new UriRefOrVariable((IRI) arg1);
} else {
throw new RuleAtomCallExeption(getClass());
}
if (dt instanceof Variable) {
predicate = new UriRefOrVariable((Variable) dt);
} else if (dt instanceof IRI) {
predicate = new UriRefOrVariable((IRI) dt);
} else {
throw new RuleAtomCallExeption(getClass());
}
if (arg2 instanceof Variable) {
object = new ResourceOrVariable((Variable) arg2);
} else if (arg2 instanceof LiteralExpression) {
object = new ResourceOrVariable(((LiteralExpression) arg2).getLiteral());
} else {
throw new RuleAtomCallExeption(getClass());
}
return (T) new ClerezzaSparqlObject(new SimpleTriplePattern(subject, predicate, object));
}
}