/*
* 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.jena.atoms;
import org.apache.stanbol.rules.adapters.AbstractAdaptableAtom;
import org.apache.stanbol.rules.adapters.jena.NodeClauseEntry;
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;
import com.hp.hpl.jena.graph.Node;
import com.hp.hpl.jena.reasoner.TriplePattern;
import com.hp.hpl.jena.reasoner.rulesys.ClauseEntry;
import com.hp.hpl.jena.reasoner.rulesys.Rule;
/**
*
* It adapts a DatavaluedPropertyAtom to triple pattern of Jena.
*
* @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();
ClauseEntry argument2ClauseEntry = adapter.adaptTo(argument2, Rule.class);
ClauseEntry argument1ClauseEntry = adapter.adaptTo(argument1, Rule.class);
ClauseEntry datatypePropertyClauseEntry = adapter.adaptTo(datatypeProperty, Rule.class);
Node subjectNode = null;
Node predicateNode = null;
Node objectNode = null;
if (argument1ClauseEntry instanceof NodeClauseEntry) {
subjectNode = ((NodeClauseEntry) argument1ClauseEntry).getNode();
} else {
throw new RuleAtomCallExeption(getClass());
}
if (datatypePropertyClauseEntry instanceof NodeClauseEntry) {
predicateNode = ((NodeClauseEntry) datatypePropertyClauseEntry).getNode();
} else {
throw new RuleAtomCallExeption(getClass());
}
if (argument2ClauseEntry instanceof NodeClauseEntry) {
objectNode = ((NodeClauseEntry) argument2ClauseEntry).getNode();
} else {
throw new RuleAtomCallExeption(getClass());
}
return (T) new TriplePattern(subjectNode, predicateNode, objectNode);
}
}