/*
* 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.writers;
import java.io.IOException;
import java.io.Writer;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.mapreduce.RecordWriter;
import org.apache.jena.hadoop.rdf.io.registry.WriterFactory;
import org.apache.jena.hadoop.rdf.types.QuadWritable;
import org.apache.jena.hadoop.rdf.types.TripleWritable;
import org.apache.jena.riot.Lang;
/**
* Abstract writer factory for languages that support triples and quads
*/
public abstract class AbstractWriterFactory implements WriterFactory {
private Lang lang;
private Collection<Lang> alternateLangs = Collections.unmodifiableList(Collections.<Lang>emptyList());
public AbstractWriterFactory(Lang lang) {
this(lang, (Collection<Lang>)null);
}
public AbstractWriterFactory(Lang lang, Lang...altLangs) {
this(lang, Arrays.asList(altLangs));
}
public AbstractWriterFactory(Lang lang, Collection<Lang> altLangs) {
this.lang = lang;
if (altLangs != null)
this.alternateLangs = Collections.unmodifiableCollection(altLangs);
}
@Override
public final Lang getPrimaryLanguage() {
return this.lang;
}
@Override
public final Collection<Lang> getAlternativeLanguages() {
return this.alternateLangs;
}
@Override
public final boolean canWriteQuads() {
return true;
}
@Override
public final boolean canWriteTriples() {
return true;
}
@Override
public abstract <TKey> RecordWriter<TKey, QuadWritable> createQuadWriter(Writer writer, Configuration config) throws IOException;
@Override
public abstract <TKey> RecordWriter<TKey, TripleWritable> createTripleWriter(Writer writer, Configuration config) throws IOException;
}