/*

  * 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.core.web.format;

 import java.security.GeneralSecurityException;

 import org.kuali.rice.core.api.CoreConstants;

 import org.kuali.rice.core.api.encryption.EncryptionService;

 import org.kuali.rice.core.api.resourceloader.GlobalResourceLoader;

 /**

  * This formatter calls the encryption service to encrypt/decrypt values.

  */

 public class EncryptionFormatter extends Formatter {

     private static final long serialVersionUID = -4109390572922205211L;

     private transient EncryptionService encryptionService;

     protected Object convertToObject(String target) {

         if (Formatter.isEmptyValue(target))

             return null;

         String decryptedValue = null;

         try {

             decryptedValue = getEncryptionFormatter().decrypt(target);

         } catch (GeneralSecurityException e) {

             throw new RuntimeException("Unable to decrypt value.");

         }

         return decryptedValue;

     }

     public Object format(Object target) {

         String encryptedValue = null;

         try {

             encryptedValue = getEncryptionFormatter().encrypt(target);

         } catch (GeneralSecurityException e) {

             throw new RuntimeException("Unable to encrypt secure field.");

         }

         return encryptedValue;

     }

     protected EncryptionService getEncryptionFormatter() {

             if (this.encryptionService == null) {

                     this.encryptionService = GlobalResourceLoader.getService(CoreConstants.Services.ENCRYPTION_SERVICE);

             }

             return this.encryptionService;

     }

 }