/*
 * JBoss, the OpenSource J2EE webOS
 *
 * Distributable under LGPL license.
 * See terms of license at gnu.org.
 */
package org.jboss.util.propertyeditor;

import java.util.ArrayList;
import java.util.StringTokenizer;
import java.beans.PropertyEditorSupport;

/** A property editor for Class[].
 *
 * @version $Revision: 1.1.2.2 $
 * @author Scott.Stark@jboss.org
 */
public class ClassArrayEditor
   extends PropertyEditorSupport
{
   /** Build a Class[] from a comma/whitespace seperated list of classes
    * @param text - the class name list
    */
   public void setAsText(final String text) throws IllegalArgumentException
   {
      ClassLoader loader = Thread.currentThread().getContextClassLoader();
      StringTokenizer tokenizer = new StringTokenizer(text, ", \t\r\n");
      ArrayList classes = new ArrayList();
      while( tokenizer.hasMoreTokens() == true )
      {
         String name = tokenizer.nextToken();
         try
         {
            Class c = loader.loadClass(name);
            classes.add(c);
         }
         catch(ClassNotFoundException e)
         {
            throw new IllegalArgumentException("Failed to find class: "+name);
         }
      }

      Class[] theValue = new Class[classes.size()];
      classes.toArray(theValue);
      setValue(theValue);
   }

   /**
    * @return a comma seperated string of the class array
    */
   public String getAsText()
   {
      String[] theValue = (String[]) getValue();
      StringBuffer text = new StringBuffer();
      int length = theValue == null ? 0 : theValue.length;
      for(int n = 0; n < length; n ++)
      {
         text.append(theValue[n]);
         text.append(',');
      }
      // Remove the trailing ','
      text.setLength(text.length()-1);
      return text.toString();
   }
}
