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BoilerpipeExtractorRepository.java
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BoilerpipeExtractorRepository.java
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/*
* 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.nutch.parse.tika;
import java.lang.invoke.MethodHandles;
import java.util.HashMap;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import de.l3s.boilerpipe.BoilerpipeExtractor;
class BoilerpipeExtractorRepository {
private static final Logger LOG = LoggerFactory
.getLogger(MethodHandles.lookup().lookupClass());
public static final HashMap<String, BoilerpipeExtractor> extractorRepository = new HashMap<>();
/**
* Returns an instance of the specified extractor
*/
public static synchronized BoilerpipeExtractor getExtractor(String boilerpipeExtractorName) {
// Check if there's no instance of this extractor
if (!extractorRepository.containsKey(boilerpipeExtractorName)) {
// FQCN
boilerpipeExtractorName = "de.l3s.boilerpipe.extractors." + boilerpipeExtractorName;
// Attempt to load the class
try {
ClassLoader loader = BoilerpipeExtractor.class.getClassLoader();
Class extractorClass = loader.loadClass(boilerpipeExtractorName);
// Add an instance to the repository
extractorRepository.put(boilerpipeExtractorName, (BoilerpipeExtractor)extractorClass.getConstructor().newInstance());
} catch (ClassNotFoundException e) {
LOG.error("BoilerpipeExtractor " + boilerpipeExtractorName + " not found!");
} catch (InstantiationException e) {
LOG.error("Could not instantiate " + boilerpipeExtractorName);
} catch (Exception e) {
LOG.error(e.getLocalizedMessage());
}
}
return extractorRepository.get(boilerpipeExtractorName);
}
}