/*
* 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.sparql.atoms;
import org.apache.stanbol.rules.adapters.AbstractAdaptableAtom;
import org.apache.stanbol.rules.adapters.sparql.SPARQLFunction;
import org.apache.stanbol.rules.base.api.RuleAtom;
import org.apache.stanbol.rules.base.api.RuleAtomCallExeption;
import org.apache.stanbol.rules.base.api.SPARQLObject;
import org.apache.stanbol.rules.base.api.Symbols;
import org.apache.stanbol.rules.base.api.UnavailableRuleObjectException;
import org.apache.stanbol.rules.base.api.UnsupportedTypeForExportException;
import org.apache.stanbol.rules.manager.atoms.StringFunctionAtom;
/**
* FIXME
*
* @author anuzzolese
*
*/
public class LetAtom extends AbstractAdaptableAtom {
@SuppressWarnings("unchecked")
@Override
public <T> T adapt(RuleAtom ruleAtom) throws RuleAtomCallExeption,
UnavailableRuleObjectException,
UnsupportedTypeForExportException {
org.apache.stanbol.rules.manager.atoms.LetAtom tmp = (org.apache.stanbol.rules.manager.atoms.LetAtom) ruleAtom;
String variableArgument = tmp.getVariable().toString().replace(Symbols.variablesPrefix, "");
StringFunctionAtom argument = tmp.getParameterFunctionAtom();
SPARQLObject sparqlArgument = adapter.adaptTo(argument, SPARQLObject.class);
String arg = sparqlArgument.getObject();
String let = "LET (?" + variableArgument + " := " + arg + ")";
SPARQLObject sparqlObject = new SPARQLFunction(let);
return (T) sparqlObject;
}
}