| /* |
| * 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.feed; |
| |
| import java.util.Date; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.io.Text; |
| import org.apache.nutch.crawl.CrawlDatum; |
| import org.apache.nutch.crawl.Inlinks; |
| import org.apache.nutch.indexer.IndexingException; |
| import org.apache.nutch.indexer.IndexingFilter; |
| import org.apache.nutch.indexer.NutchDocument; |
| import org.apache.nutch.metadata.Feed; |
| import org.apache.nutch.metadata.Metadata; |
| import org.apache.nutch.parse.Parse; |
| import org.apache.nutch.parse.ParseData; |
| |
| /** |
| * @author dogacan |
| * @author mattmann |
| * @since NUTCH-444 |
| * |
| * An {@link IndexingFilter} implementation to pull out the relevant |
| * extracted {@link Metadata} fields from the RSS feeds and into the |
| * index. |
| * |
| */ |
| public class FeedIndexingFilter implements IndexingFilter { |
| |
| public static final String dateFormatStr = "yyyyMMddHHmm"; |
| |
| private Configuration conf; |
| |
| private final static String PUBLISHED_DATE = "publishedDate"; |
| |
| private final static String UPDATED_DATE = "updatedDate"; |
| |
| /** |
| * Extracts out the relevant fields: |
| * |
| * <ul> |
| * <li>FEED_AUTHOR</li> |
| * <li>FEED_TAGS</li> |
| * <li>FEED_PUBLISHED</li> |
| * <li>FEED_UPDATED</li> |
| * <li>FEED</li> |
| * </ul> |
| * |
| * And sends them to the {@link org.apache.nutch.indexer Indexer} for indexing within the Nutch index. |
| * |
| */ |
| public NutchDocument filter(NutchDocument doc, Parse parse, Text url, |
| CrawlDatum datum, Inlinks inlinks) throws IndexingException { |
| ParseData parseData = parse.getData(); |
| Metadata parseMeta = parseData.getParseMeta(); |
| |
| String[] authors = parseMeta.getValues(Feed.FEED_AUTHOR); |
| String[] tags = parseMeta.getValues(Feed.FEED_TAGS); |
| String published = parseMeta.get(Feed.FEED_PUBLISHED); |
| String updated = parseMeta.get(Feed.FEED_UPDATED); |
| String feed = parseMeta.get(Feed.FEED); |
| |
| if (authors != null) { |
| for (String author : authors) { |
| doc.add(Feed.FEED_AUTHOR, author); |
| } |
| } |
| |
| if (tags != null) { |
| for (String tag : tags) { |
| doc.add(Feed.FEED_TAGS, tag); |
| } |
| } |
| |
| if (feed != null) |
| doc.add(Feed.FEED, feed); |
| |
| if (published != null) { |
| Date date = new Date(Long.parseLong(published)); |
| doc.add(PUBLISHED_DATE, date); |
| } |
| |
| if (updated != null) { |
| Date date = new Date(Long.parseLong(updated)); |
| doc.add(UPDATED_DATE, date); |
| } |
| |
| return doc; |
| } |
| |
| /** |
| * @return the {@link Configuration} object used to configure this |
| * {@link IndexingFilter}. |
| */ |
| public Configuration getConf() { |
| return conf; |
| } |
| |
| /** |
| * Sets the {@link Configuration} object used to configure this |
| * {@link IndexingFilter}. |
| * |
| * @param conf |
| * The {@link Configuration} object used to configure this |
| * {@link IndexingFilter}. |
| */ |
| public void setConf(Configuration conf) { |
| this.conf = conf; |
| } |
| |
| } |