| /* |
| * 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.scoring.similarity; |
| |
| import java.util.Collection; |
| import java.util.Map.Entry; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.io.Text; |
| import org.apache.nutch.crawl.CrawlDatum; |
| import org.apache.nutch.metadata.Nutch; |
| import org.apache.nutch.parse.Parse; |
| import org.apache.nutch.parse.ParseData; |
| import org.apache.nutch.protocol.Content; |
| import org.apache.nutch.scoring.AbstractScoringFilter; |
| import org.apache.nutch.scoring.ScoringFilterException; |
| import org.apache.nutch.scoring.similarity.cosine.CosineSimilarity; |
| |
| public class SimilarityScoringFilter extends AbstractScoringFilter { |
| |
| private Configuration conf; |
| private SimilarityModel similarityModel; |
| @Override |
| public Configuration getConf() { |
| return conf; |
| } |
| |
| @Override |
| public void setConf(Configuration conf) { |
| this.conf = conf; |
| switch(conf.get("scoring.similarity.model","cosine")){ |
| case "cosine": |
| similarityModel = (SimilarityModel) new CosineSimilarity(); |
| break; |
| } |
| similarityModel.setConf(conf); |
| } |
| |
| @Override |
| public void passScoreAfterParsing(Text url, Content content, Parse parse) |
| throws ScoringFilterException { |
| |
| float score = similarityModel.setURLScoreAfterParsing(url, content, parse); |
| parse.getData().getContentMeta() |
| .set(Nutch.SCORE_KEY, score+""); |
| } |
| |
| @Override |
| public CrawlDatum distributeScoreToOutlinks(Text fromUrl, |
| ParseData parseData, Collection<Entry<Text, CrawlDatum>> targets, |
| CrawlDatum adjust, int allCount) throws ScoringFilterException { |
| similarityModel.distributeScoreToOutlinks(fromUrl, parseData, targets, adjust, allCount); |
| return adjust; |
| } |
| } |