/*
* 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 com.hp.hpl.jena.sparql.lang;
import java.io.Reader ;
import java.io.StringReader ;
import com.hp.hpl.jena.query.Query ;
import com.hp.hpl.jena.query.QueryException ;
import com.hp.hpl.jena.query.QueryParseException ;
import com.hp.hpl.jena.query.Syntax ;
import com.hp.hpl.jena.shared.JenaException ;
import com.hp.hpl.jena.sparql.lang.arq.ARQParser ;
import com.hp.hpl.jena.sparql.syntax.Element ;
import com.hp.hpl.jena.sparql.syntax.Template ;
import org.openjena.atlas.logging.Log ;
public class ParserARQ extends Parser
{
private interface Action { void exec(ARQParser parser) throws Exception ; }
@Override
protected Query parse$(final Query query, String queryString)
{
query.setSyntax(Syntax.syntaxARQ) ;
Action action = new Action() {
@Override
public void exec(ARQParser parser) throws Exception
{
parser.QueryUnit() ;
}
} ;
perform(query, queryString, action) ;
validateParsedQuery(query) ;
return query ;
}
public static Element parseElement(String string)
{
final Query query = new Query () ;
Action action = new Action() {
@Override
public void exec(ARQParser parser) throws Exception
{
Element el = parser.GroupGraphPattern() ;
query.setQueryPattern(el) ;
}
} ;
perform(query, string, action) ;
return query.getQueryPattern() ;
}
public static Template parseTemplate(String string)
{
final Query query = new Query () ;
Action action = new Action() {
@Override
public void exec(ARQParser parser) throws Exception
{
Template t = parser.ConstructTemplate() ;
query.setConstructTemplate(t) ;
}
} ;
perform(query, string, action) ;
return query.getConstructTemplate() ;
}
// All throwable handling.
private static void perform(Query query, String string, Action action)
{
Reader in = new StringReader(string) ;
ARQParser parser = new ARQParser(in) ;
try {
query.setStrict(true) ;
parser.setQuery(query) ;
action.exec(parser) ;
}
catch (com.hp.hpl.jena.sparql.lang.arq.ParseException ex)
{
throw new QueryParseException(ex.getMessage(),
ex.currentToken.beginLine,
ex.currentToken.beginColumn
) ; }
catch (com.hp.hpl.jena.sparql.lang.arq.TokenMgrError tErr)
{
// Last valid token : not the same as token error message - but this should not happen
int col = parser.token.endColumn ;
int line = parser.token.endLine ;
throw new QueryParseException(tErr.getMessage(), line, col) ; }
catch (QueryException ex) { throw ex ; }
catch (JenaException ex) { throw new QueryException(ex.getMessage(), ex) ; }
catch (Error err)
{
// The token stream can throw errors.
throw new QueryParseException(err.getMessage(), err, -1, -1) ;
}
catch (Throwable th)
{
Log.warn(ParserSPARQL11.class, "Unexpected throwable: ",th) ;
throw new QueryException(th.getMessage(), th) ;
}
}
}