/*
    * Copyright 2006-2008 The Kuali Foundation
    * 
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    * 
   * 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.kuali.rice.kns.web.format;
  
  import java.security.GeneralSecurityException;
  
  import org.kuali.rice.kns.service.KNSServiceLocator;
  
  /**
   * This formatter calls the encryption service to encrypt/decrypt values.
   * 
   * 
   */
  public class EncryptionFormatter extends Formatter {
      private static final long serialVersionUID = -4109390572922205211L;
  
      protected Object convertToObject(String target) {
          if (Formatter.isEmptyValue(target))
              return null;
  
          String decryptedValue = null;
          try {
              decryptedValue = KNSServiceLocator.getEncryptionService().decrypt(target);
          }
          catch (GeneralSecurityException e) {
              throw new RuntimeException("Unable to decrypt value.");
          }
  
          return decryptedValue;
      }
  
      public Object format(Object target) {
          String encryptedValue = null;
          try {
              encryptedValue = KNSServiceLocator.getEncryptionService().encrypt(target);
          }
          catch (GeneralSecurityException e) {
              throw new RuntimeException("Unable to encrypt secure field.");
          }
  
          return encryptedValue;
      }
  }