/*

  * Copyright 2007 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.util;

 import java.security.GeneralSecurityException;

 import org.apache.commons.lang.StringUtils;

 import org.apache.ojb.broker.accesslayer.conversions.FieldConversion;

 import org.kuali.rice.core.service.EncryptionService;

 import org.kuali.rice.kns.service.KNSServiceLocator;

 /**

  * This class calls core service to hash values going to the database.

  * 

  * 

  */

 public class OjbKualiHashFieldConversion implements FieldConversion {

     /**

      * @see FieldConversion#javaToSql(Object)

      */

     public Object javaToSql(Object source) {

         Object converted = source;

         if ( converted != null ) {

             // don't convert if already a hashed value

             if ( converted.toString().endsWith( EncryptionService.HASH_POST_PREFIX ) ) {

                 converted = StringUtils.stripEnd( converted.toString(), EncryptionService.HASH_POST_PREFIX );

             } else {

                 try {

                     converted = KNSServiceLocator.getEncryptionService().hash(converted);

                 } catch (GeneralSecurityException e) {

                     throw new RuntimeException("Unable to hash value to db: " + e.getMessage());

                 }

             }

         }

         return converted;

     }

     /**

      * @see FieldConversion#sqlToJava(Object)

      */

     public Object sqlToJava(Object source) {

         if ( source == null ) {

             return "";

         }

         return source.toString() + EncryptionService.HASH_POST_PREFIX;

     }

 }