/*
* 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.rdf.model;
/**
The interface for visiting (ie type-dispatching) an RDF Node.
*/
public interface RDFVisitor
{
/**
Method to call when visiting a blank node r with identifier id.
@param r the blank RDF node being visited
@param id the identifier of that node
@return value to be returned from the visit
*/
Object visitBlank( Resource r, AnonId id );
/**
Method to call when visiting a URI node r with the given uri.
@param r the URI node being visited
@param uri the URI string of that node
@return value to be returned from the visit
*/
Object visitURI( Resource r, String uri );
/**
Method to call when visiting a literal RDF node l.
@param l the RDF Literal node
@return a value to be returned from the visit
*/
Object visitLiteral( Literal l );
}