/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2003 The Apache Software Foundation.  All rights 
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:  
 *       "This product includes software developed by the 
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Pluto", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written 
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
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 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 * ====================================================================
 *
 * This source code implements specifications defined by the Java
 * Community Process. In order to remain compliant with the specification
 * DO NOT add / change / or delete method signatures!
 */

package javax.portlet;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Enumeration;

/**
 * The <CODE>ValidatorException</CODE> is thrown by the
 * <CODE>validate</CODE> method of a PreferencesValidator when 
 * the validation of a preference failed.
 */

public class ValidatorException extends PortletException
{


  private transient ArrayList failedKeyVector = new ArrayList();

  private ValidatorException ()
  {
  }

  /**
   * Constructs a new validator exception with the given text. The
   * portlet container may use the text write it to a log.
   * <p>
   * The collection of failed keys may contain all failed keys, only the
   * first key that failed validation, or may be <code>null</code>.
   *
   * @param   text
   *          the exception text
   * @param   failedKeys
   *          keys that failed the validation; may be <code>null</code>
   */

  public ValidatorException (String text, Collection failedKeys)
  {
    super (text);
    if ( failedKeys != null )
	    failedKeyVector.addAll(failedKeys);
  }

  /**
   * Constructs a new portlet validator exception.
   * Used, when the portlet needs to do one of the following:
   * <ul>
   * <il>throw an exception 
   * <li>include a message about the "root cause" that interfered
   *     with its normal operation
   * <li>include a description message
   * </ul>
   * <p>
   * The Collection of failed keys may contain all failed keys, only the
   * first key that failed validation, or may be <code>null</code>.
   *
   * @param   text
   *          the exception text
   * @param   cause
   *          the root cause
   * @param   failedKeys
   *          keys that failed the validation; may be <code>null</code>
   */
  
  public ValidatorException (String text, Throwable cause, Collection failedKeys)
  {
    super(text, cause);
    if ( failedKeys != null )
	    failedKeyVector.addAll(failedKeys);
  }

  /**
   * Constructs a new portlet validator exception when the portlet needs to throw an
   * exception. The exception message is based on the localized message
   * of the underlying exception.
   * <p>
   * The Collection of failed keys may contain all failed keys, only the
   * first key that failed validation, or may be <code>null</code>.
   *
   * @param   cause
   *          the root cause
   * @param   failedKeys
   *          keys that failed the validation; may be <code>null</code>
   */

  public ValidatorException (Throwable cause, Collection failedKeys)
  {
    super(cause);
    if ( failedKeys != null )
	    failedKeyVector.addAll(failedKeys);
  }


  /**
   * Returns the keys that failed the validation.
   * <p>
   * The Enumeration of failed keys may contain all failed keys, only the
   * first key that failed validation, or an empty 
   * <code>Enumeration</code> if no failed keys are available.
   *
   * @return  the keys that failed validation, or an empty 
   *          <code>Enumeration</code> if no failed keys are available.
   */

  public Enumeration getFailedKeys()
  {
    return Collections.enumeration(failedKeyVector);
  }
}