package uk.ac.ebi.intenz.webapp.utilities;
   
   import org.apache.log4j.Logger;
   
   import java.util.ArrayList;
   
   /**
    * AutoGrowingList
    *
   * @author pmatos
   * @version $Revision: 1.2 $ $Date: 2008/01/28 12:33:09 $
   */
  public class AutoGrowingList extends ArrayList {
  
    private Class clazz;
    Logger logger = Logger.getRootLogger();
  
    public AutoGrowingList(Class clazz) {
      super();
      this.clazz = clazz;
    }
  
    public Object get(int index) {
      Object obj = null;
      if (this.size() > index)
        obj = super.get(index);
  
      if (obj == null) {
        try {
          obj = clazz.newInstance();
        } catch (InstantiationException e) {
          e.printStackTrace();
        } catch (IllegalAccessException e) {
          e.printStackTrace();
        }
        if (index > this.size()) {
          int indexCounter = this.size();
          while (indexCounter < index) {
            try {
              super.add(clazz.newInstance());
              indexCounter++;
            } catch (InstantiationException e) {
              logger.error("Error instantiating object of type " + clazz.getName());
            } catch (IllegalAccessException e) {
              logger.error(("Error in illegal access of the class " + clazz.getName()));
            }
          }
        }
        super.add(obj);
      }
  
      return obj;
    }
  
    public Object set(int index, Object obj) {
      if (this.size() > index)
        super.set(index, obj);
      else {
        int indexCounter = this.size();
        while (indexCounter < index) {
          try {
            super.add(clazz.newInstance());
            indexCounter++;
          } catch (InstantiationException e) {
            logger.error("Error instantiating object of type " + clazz.getName());
          } catch (IllegalAccessException e) {
            logger.error(("Error in illegal access of the class " + clazz.getName()));
          }
        }
        super.add(obj);
      }
      return obj;
    }
  }