/*
* 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.jena.sparql.serializer;
import org.apache.jena.atlas.io.IndentedWriter ;
import org.apache.jena.graph.Node ;
import org.apache.jena.graph.Triple ;
import org.apache.jena.sparql.core.BasicPattern ;
import org.apache.jena.sparql.util.FmtUtils ;
public abstract class FormatterBase
{
protected IndentedWriter out ;
protected SerializationContext context ;
protected FormatterBase(IndentedWriter _out, SerializationContext _context)
{
out = _out ;
context = _context ;
}
public void startVisit() {}
public void finishVisit() { out.flush() ; }
// Utilities
protected void formatTriples(BasicPattern pattern)
{
FmtUtils.formatPattern(out, pattern, context) ;
}
protected void formatTriple(Triple tp)
{
out.print(slotToString(tp.getSubject())) ;
out.print(" ") ;
out.print(slotToString(tp.getPredicate())) ;
out.print(" ") ;
out.print(slotToString(tp.getObject())) ;
}
protected String slotToString(Node n)
{
return FmtUtils.stringForNode(n, context) ;
}
}