/*
* 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.indexer.subcollection;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.io.Text;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.nutch.parse.Parse;
import org.apache.nutch.util.NutchConfiguration;
import org.apache.nutch.indexer.IndexingFilter;
import org.apache.nutch.indexer.IndexingException;
import org.apache.nutch.indexer.NutchDocument;
import org.apache.nutch.collection.CollectionManager;
import org.apache.nutch.collection.Subcollection;
import org.apache.nutch.crawl.CrawlDatum;
import org.apache.nutch.crawl.Inlinks;
public class SubcollectionIndexingFilter extends Configured implements IndexingFilter {
private Configuration conf;
public SubcollectionIndexingFilter(){
super(NutchConfiguration.create());
}
public SubcollectionIndexingFilter(Configuration conf) {
super(conf);
}
/**
* @param Configuration conf
*/
public void setConf(Configuration conf) {
this.conf = conf;
fieldName = conf.get("subcollection.default.fieldname", "subcollection");
}
/**
* @return Configuration
*/
public Configuration getConf() {
return this.conf;
}
/**
* Doc field name
*/
public static String fieldName = "subcollection";
/**
* Logger
*/
public static final Logger LOG = LoggerFactory.getLogger(SubcollectionIndexingFilter.class);
/**
* "Mark" document to be a part of subcollection
*
* @param doc
* @param url
*/
private void addSubCollectionField(NutchDocument doc, String url) {
for (Subcollection coll : CollectionManager.getCollectionManager(getConf()).getSubCollections(url)) {
if (coll.getKey() == null) {
doc.add(fieldName, coll.getName());
} else {
doc.add(coll.getKey(), coll.getName());
}
}
}
public NutchDocument filter(NutchDocument doc, Parse parse, Text url, CrawlDatum datum, Inlinks inlinks) throws IndexingException {
String sUrl = url.toString();
addSubCollectionField(doc, sUrl);
return doc;
}
}