content: /**
   * Copyright 2010 The Apache Software Foundation
   *
   * 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.hbasene.index.create.mapred;
  
  import java.io.IOException;
  import java.util.Iterator;
  
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.apache.hadoop.hbase.KeyValue;
  import org.apache.hadoop.hbase.client.Result;
  import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
  import org.apache.hadoop.hbase.util.Bytes;
  import org.apache.hadoop.mapred.JobConf;
  import org.apache.hadoop.mapred.MapReduceBase;
  import org.apache.hadoop.mapred.OutputCollector;
  import org.apache.hadoop.mapred.Reducer;
  import org.apache.hadoop.mapred.Reporter;
  import org.apache.lucene.document.Document;
  import org.apache.lucene.document.Field;
  import org.hbasene.index.create.IndexConfiguration;
  import org.hbasene.index.create.LuceneDocumentWrapper;
  
  
  /**
   * Construct a Lucene document per row, which is consumed by IndexOutputFormat
   * to build a Lucene index
   */
  @Deprecated
  public class IndexTableReduce extends MapReduceBase implements
      Reducer<ImmutableBytesWritable, Result, ImmutableBytesWritable, LuceneDocumentWrapper> {
    private static final Log LOG = LogFactory.getLog(IndexTableReduce.class);
    private IndexConfiguration indexConf;
  
    @Override
    public void configure(JobConf job) {
      super.configure(job);
      indexConf = new IndexConfiguration();
      String content = job.get("hbase.index.conf");
      if (content != null) {
        indexConf.addFromXML(content);
      }
      if (LOG.isDebugEnabled()) {
        LOG.debug("Index conf: " + indexConf);
      }
    }
  
    @Override
    public void close() throws IOException {
      super.close();
    }
  
    public void reduce(ImmutableBytesWritable key, Iterator<Result> values,
        OutputCollector<ImmutableBytesWritable, LuceneDocumentWrapper> output,
        Reporter reporter)
    throws IOException {
      Document doc = null;
      while(values.hasNext()) {
        Result r = values.next();
        if (doc == null) {
          doc = new Document();
          // index and store row key, row key already UTF-8 encoded
          Field keyField = new Field(indexConf.getRowkeyName(),
            Bytes.toString(key.get(), key.getOffset(), key.getLength()),
            Field.Store.YES, Field.Index.NOT_ANALYZED);
          keyField.setOmitNorms(true);
          doc.add(keyField);
        }
        // each column (name-value pair) is a field (name-value pair)
        for (KeyValue kv: r.list()) {
          // name is already UTF-8 encoded
          String column = Bytes.toString(kv.getQualifier());
          byte[] columnValue = kv.getValue();
          Field.Store store = indexConf.isStore(column)?
            Field.Store.YES: Field.Store.NO;
          Field.Index index = indexConf.isIndex(column)?
            (indexConf.isTokenize(column)?
              Field.Index.ANALYZED: Field.Index.NOT_ANALYZED):
              Field.Index.NO;
  
          // UTF-8 encode value
          Field field = new Field(column, Bytes.toString(columnValue),
            store, index);
          field.setBoost(indexConf.getBoost(column));
          field.setOmitNorms(indexConf.isOmitNorms(column));
  
          doc.add(field);
        }
      }
      output.collect(key, new LuceneDocumentWrapper(doc));
    }
  }