/*
* 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.hadoop.rdf.io.registry;
import java.io.IOException;
import java.util.Collection;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.mapreduce.RecordReader;
import org.apache.jena.hadoop.rdf.types.QuadWritable;
import org.apache.jena.hadoop.rdf.types.TripleWritable;
import org.apache.jena.riot.Lang;
/**
* Interface for reader factories
*
*/
public interface ReaderFactory {
/**
* Gets the primary language this factory produces readers for
*
* @return Primary language
*/
public abstract Lang getPrimaryLanguage();
/**
* Gets the alternative languages this factory can produce readers for
*
* @return Alternative languages
*/
public abstract Collection<Lang> getAlternativeLanguages();
/**
* Gets whether this factory can produce readers that are capable of reading
* quads
*
* @return True if quads can be read, false if not
*/
public abstract boolean canReadQuads();
/**
* Gets whether this factory can produce readers that are capable of reading
* triples
*
* @return True if triples can be read, false if not
*/
public abstract boolean canReadTriples();
/**
* Creates a quad reader
*
* @return Quad reader
* @throws IOException
* May be thrown if a quad reader cannot be created
*/
public abstract RecordReader<LongWritable, QuadWritable> createQuadReader() throws IOException;
/**
* Creates a triples reader
*
* @return Triples reader
* @throws IOException
* May be thrown if a triple reader cannot be created
*/
public abstract RecordReader<LongWritable, TripleWritable> createTripleReader() throws IOException;
}