/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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 javax.faces.validator;
  
  import java.util.Collection;
  
  import javax.faces.FacesException;
  import javax.faces.application.FacesMessage;
  
  /**
   * see Javadoc of <a href="http://java.sun.com/javaee/javaserverfaces/1.2/docs/api/index.html">JSF Specification</a>
   */
  public class ValidatorException
          extends FacesException
  {
      private static final long serialVersionUID = 5965885122446047949L;
      private FacesMessage _facesMessage;
      private Collection<FacesMessage> _facesMessages;
  
      public ValidatorException(Collection<FacesMessage> messages)
      {
          super(facesMessagesToString(messages));
          _facesMessages = messages;
      }
      
      public ValidatorException(Collection<FacesMessage> messages, Throwable cause)
      {
          super(facesMessagesToString(messages),cause);
          _facesMessages = messages;
      }
      
      public ValidatorException(FacesMessage message)
      {
          super(facesMessageToString(message));
          _facesMessage = message;
      }
  
      public ValidatorException(FacesMessage message,
                                Throwable cause)
      {
          super(facesMessageToString(message), cause);
          _facesMessage = message;
      }
  
      public FacesMessage getFacesMessage()
      {
          return _facesMessage;
      }
      
      public Collection<FacesMessage> getFacesMessages()
      {
          return _facesMessages;
      }
  
      private static String facesMessageToString(FacesMessage message)
      {
          String summary = message.getSummary();
          String detail = message.getDetail();
          
          if (summary != null)
          {
              if (detail != null)
              {
                  return summary + ": " + detail;
              }
              
              return summary;
          }
          
          return detail != null ? detail : "";
      }
      
      private static String facesMessagesToString(Collection<FacesMessage> messages)
      {
          if (messages == null || messages.isEmpty())
          {
              return "";
          }
          StringBuilder sb = new StringBuilder();
  
          String separator = "";
          for (FacesMessage message : messages)
          {
             if (message != null)
             {
                 String summary = message.getSummary();
                 String detail = message.getDetail();
                 
                 if (summary != null)
                 {
                     sb.append(separator);
                     sb.append(summary);
                     if (detail != null)
                     {
                         sb.append(": ");
                         sb.append(detail);
                     }
                     separator = ", ";
                 }
             }
         }
         return sb.toString();
     }
 }