• Home
• org.apache.mahout
• mahout-integration
• 0.12.1
• source code
• WikipediaMapper.java

×

Project download

Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance.
Project price only 1 $

You can buy this project and download/modify it how often you want.

org.apache.mahout.text.wikipedia.WikipediaMapper Maven / Gradle / Ivy

/*
 * 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.mahout.text.wikipedia;

import java.io.IOException;
import java.util.HashSet;
import java.util.Locale;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.lang3.StringEscapeUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.DefaultStringifier;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.util.GenericsUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Maps over Wikipedia xml format and output all document having the category listed in the input category
 * file
 * 
 */
public class WikipediaMapper extends Mapper {

  private static final Logger log = LoggerFactory.getLogger(WikipediaMapper.class);

  private static final Pattern SPACE_NON_ALPHA_PATTERN = Pattern.compile("[\\s]");

  private static final String START_DOC = "";

  private static final String END_DOC = "";

  private static final Pattern TITLE = Pattern.compile("