/*
    * Created by IntelliJ IDEA.
    * User: mike
    * Date: Jan 7, 2002
    * Time: 4:32:26 AM
    * To change template for new class use
    * Code Style | Class Templates options (Tools | IDE Options).
    */
   package com.atlassian.core.util;
  
  import com.opensymphony.util.TextUtils;
  
  import java.util.ArrayList;
  import java.util.Iterator;
  import java.util.List;
  
  public class FilterUtils
  {
      /**
       * Returned string is non-null IFF there is a true value (ie some text)
       */
      public static String verifyString(String s)
      {
          if (TextUtils.stringSet(TextUtils.noNull(s).trim()))
          {
              return s;
          }
          else
          {
              return null;
          }
      }
  
      /**
       * Retirned string array is non-null IFF there is a true value (ie some text)
       */
      public static String[] verifyStringArray(String[] sa)
      {
          List<String> result = new ArrayList<String>();
  
          for (int i = 0; i < sa.length; i++)
          {
              String s = verifyString(sa[i]);
              if (s != null)
                  result.add(s);
          }
  
          if (result.size() == 0)
          {
              return null;
          }
          else
          {
              String[] resultSa = new String[result.size()];
              int count = 0;
              for (Iterator<String> iterator = result.iterator(); iterator.hasNext();)
              {
                  resultSa[count++] = iterator.next();
              }
  
              return resultSa;
          }
      }
  
      public static Long verifyLong(Long id)
      {
          if (id != null && id.longValue() > 0)
          {
              return id;
          }
  
          return null;
      }
  
  }