/*
* 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.rdf.core.sparql.query.BinaryOperation;
import org.apache.clerezza.rdf.core.sparql.query.ConstructQuery;
import org.apache.clerezza.rdf.core.sparql.query.Expression;
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.NumericFunctionAtom;
/**
* It adapts any SubtractionAtom to the difference (-) binary operation in Clerezza.
*
* @author anuzzolese
*
*/
public class SubtractionAtom extends AbstractAdaptableAtom {
@SuppressWarnings("unchecked")
@Override
public <T> T adapt(RuleAtom ruleAtom) throws RuleAtomCallExeption,
UnavailableRuleObjectException,
UnsupportedTypeForExportException {
org.apache.stanbol.rules.manager.atoms.SubtractionAtom tmp = (org.apache.stanbol.rules.manager.atoms.SubtractionAtom) ruleAtom;
NumericFunctionAtom numericFunctionAtom1 = tmp.getNumericFunctionAtom1();
NumericFunctionAtom numericFunctionAtom2 = tmp.getNumericFunctionAtom2();
ClerezzaSparqlObject argument1 = (ClerezzaSparqlObject) adapter.adaptTo(numericFunctionAtom1,
ConstructQuery.class);
ClerezzaSparqlObject argument2 = (ClerezzaSparqlObject) adapter.adaptTo(numericFunctionAtom2,
ConstructQuery.class);
Expression lhsOperand = (Expression) argument1.getClerezzaObject();
Expression rhsOperand = (Expression) argument2.getClerezzaObject();
BinaryOperation binaryOperation = new BinaryOperation("-", lhsOperand, rhsOperand);
return (T) new ClerezzaSparqlObject(binaryOperation);
}
}