/*
* 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.InputStream ;
import org.apache.jena.atlas.io.PeekReader ;
import com.hp.hpl.jena.query.QueryParseException ;
import com.hp.hpl.jena.query.Syntax ;
import com.hp.hpl.jena.sparql.modify.UpdateSink ;
/** This class provides the root of lower level access to all the parsers.
* Each subclass hides the details of the per-language exception handlers and other
* javacc details to provide a methods that deal with setting up Query objects
* and using QueryException exceptions for problems.
*/
public abstract class UpdateParser
{
public final void parse(UpdateSink sink, String updateString) throws QueryParseException
{
// Sort out BOM
if ( updateString.startsWith("\uFEFF") )
updateString = updateString.substring(1) ;
parse$(sink, updateString) ;
}
protected abstract void parse$(UpdateSink sink, String updateString) throws QueryParseException ;
public void parse(UpdateSink sink, InputStream input) throws QueryParseException
{
// :-( Wrap in something that we can use to look for a BOM.
// ?? Move BOM processing to grammar and reverse this.
PeekReader pr = PeekReader.makeUTF8(input) ;
parse$(sink, pr) ;
}
protected abstract void parse$(UpdateSink sink, PeekReader pr) throws QueryParseException ;
public static boolean canParse(Syntax syntaxURI)
{
return UpdateParserRegistry.get().containsFactory(syntaxURI) ;
}
public static UpdateParser createParser(Syntax syntaxURI)
{
return UpdateParserRegistry.get().createParser(syntaxURI) ;
}
}