we4tech / semantic-repository

semantic repository service is intended for indexing content from different sources and maintain multi indexes for different types of content and perform different types of search. yet another solr type indexing service on top of lucene but it will gradually support content versioning and more semantic search result. 

optimized search based tag cloud service
we4tech (author)
Wed Mar 18 13:49:07 -0700 2009
commit  1aa2d4a74eda7332fa56e478fa6c7c7f8f282c73
tree    e07c517a287aa5c920f7f59a46a4e6ea248cf67f
parent  2b2c55cc87fc000fec8258abbd1b81a2660d2c3f
semantic-repository / development / idea-repository-core / src / main / java / com / ideabase / repository / core / index / NumberSortComparator.java
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/**
 * $Id$
 * *****************************************************************************
 *    Copyright (C) 2005 - 2007 somewhere in .Net ltd.
 *    All Rights Reserved.  No use, copying or distribution of this
 *    work may be made except in accordance with a valid license
 *    agreement from somewhere in .Net LTD.  This notice must be included on
 *    all copies, modifications and derivatives of this work.
 * *****************************************************************************
 * $LastChangedBy$
 * $LastChangedDate$
 * $LastChangedRevision$
 * *****************************************************************************
 */
 
package com.ideabase.repository.core.index;
 
import org.apache.lucene.search.SortComparator;
import org.apache.lucene.document.NumberTools;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;
 
/**
 * Support number sorting through custom implementation
 * @author <a href="http://hasan.we4tech.com">nhm tanveer...(hasan)</a>
 */
public class NumberSortComparator extends SortComparator {
  private final Logger mLog = LogManager.getLogger(getClass());
 
  protected Comparable getComparable(final String s) {
    if (s != null && s.length() > 10) {
      try {
        return NumberTools.stringToLong(s);
      } catch (Exception e) {
        mLog.warn("Invalid number format.", e);
        return Long.parseLong(s);
      }
    } else if (s != null && s.length() < 10) {
      return Long.parseLong(s);
    } else {
      return Long.MIN_VALUE;
    }
  }
}