Lucene example source code file (LongToEnglishContentSource.java)

This example Lucene source code file (LongToEnglishContentSource.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Lucene tags/keywords

contentsource, contentsource, date, date, docdata, io, ioexception, ioexception, longtoenglishcontentsource, nomoredataexception, override, override, util

The Lucene LongToEnglishContentSource.java source code

package org.apache.lucene.benchmark.byTask.feeds;

/**
 * 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.
 */

import org.apache.lucene.util.English;

import java.io.IOException;
import java.util.Date;

/**
 * Creates documents whose content is a <code>long number starting from
 * <code>{@link Long#MIN_VALUE} + 10.
 */
public class LongToEnglishContentSource extends ContentSource{
  private long counter = 0;

  @Override
  public void close() throws IOException {
  }
  
  @Override
  public synchronized DocData getNextDocData(DocData docData) throws NoMoreDataException, IOException {
    docData.clear();
    // store the current counter to avoid synchronization later on
    long curCounter;
    synchronized (this) {
      curCounter = counter;
      if (counter == Long.MAX_VALUE){
        counter = Long.MIN_VALUE;//loop around
      } else {
        ++counter;
      }
    }    
    docData.setBody(English.longToEnglish(curCounter));
    docData.setName("doc_" + String.valueOf(curCounter));
    docData.setTitle("title_" + String.valueOf(curCounter));
    docData.setDate(new Date());
    return docData;
  }

  @Override
  public void resetInputs() throws IOException {
    counter = Long.MIN_VALUE + 10;
  }
  
}