/*
* 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.tika.parser.external;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.List;
import java.util.Map;
import org.apache.tika.config.ServiceLoader;
import org.apache.tika.config.TikaConfig;
import org.apache.tika.exception.TikaException;
import org.apache.tika.mime.MediaType;
import org.apache.tika.parser.CompositeParser;
import org.apache.tika.parser.Parser;
/**
* Creates instances of ExternalParser based on XML
* configuration files.
*
* @see ExternalParsersConfigReader
*/
public class ExternalParsersFactory {
public static List<ExternalParser> create() throws IOException, TikaException {
return create(new ServiceLoader());
}
public static List<ExternalParser> create(ServiceLoader loader)
throws IOException, TikaException {
return create("tika-external-parsers.xml", loader);
}
public static List<ExternalParser> create(String filename, ServiceLoader loader)
throws IOException, TikaException {
String filepath = ExternalParsersFactory.class.getPackage().getName().replace('.', '/') +
"/" + filename;
Enumeration<URL> files = loader.findServiceResources(filepath);
ArrayList<URL> list = Collections.list(files);
URL[] urls = list.toArray(new URL[list.size()]);
return create(urls);
}
public static List<ExternalParser> create(URL... urls) throws IOException, TikaException {
List<ExternalParser> parsers = new ArrayList<ExternalParser>();
for(URL url : urls) {
InputStream stream = url.openStream();
try {
parsers.addAll(
ExternalParsersConfigReader.read(stream)
);
} finally {
stream.close();
}
}
return parsers;
}
public static void attachExternalParsers(TikaConfig config) throws IOException, TikaException {
attachExternalParsers( create(), config );
}
public static void attachExternalParsers(List<ExternalParser> parsers, TikaConfig config) {
Parser parser = config.getParser();
if (parser instanceof CompositeParser) {
CompositeParser cParser = (CompositeParser)parser;
Map<MediaType,Parser> parserMap = cParser.getParsers();
}
// TODO
}
}