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/*
 * JBoss, Home of Professional Open Source
 * Copyright 2015, Red Hat, Inc., and individual contributors as indicated
 * by the @authors tag.
 *
 * Licensed 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.
 */
package org.jboss.util.propertyeditor;

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

/** A property editor for Class[].
 *
 * @version $Revision$
 * @author [email protected]
 */
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()
   {
      Class[] theValue = (Class[]) getValue();
      StringBuffer text = new StringBuffer();
      int length = theValue == null ? 0 : theValue.length;
      for(int n = 0; n < length; n ++)
      {
         text.append(theValue[n].getName());
         text.append(',');
      }
      // Remove the trailing ','
      text.setLength(text.length()-1);
      return text.toString();
   }
}