/*
    *  Copyright 2001-2012 Stephen Colebourne
    *
    *  Licensed 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 org.joda.time.contrib.hibernate;
  
  import java.io.Serializable;
  import java.sql.PreparedStatement;
  import java.sql.ResultSet;
  import java.sql.SQLException;
  import java.sql.Types;
  
  import org.hibernate.HibernateException;
  import org.hibernate.type.StandardBasicTypes;
  import org.hibernate.usertype.EnhancedUserType;
  import org.joda.time.Instant;
  
  /**
   * Persist {@link org.joda.time.Instant} via hibernate as a TIMESTAMP.
   * 
   * @author Olav Reinert (oreinert@sourceforge.net)
   */
  public class PersistentInstant implements EnhancedUserType {
  
      public static final PersistentInstant INSTANCE = new PersistentInstant();
  
      private static final int[] SQL_TYPES = new int[] { Types.TIMESTAMP };
  
      public int[] sqlTypes() {
          return SQL_TYPES;
      }
  
      public Class returnedClass() {
          return Instant.class;
      }
  
      public boolean equals(Object x, Object y) throws HibernateException {
          if (x == y) {
              return true;
          }
          if (x == null || y == null) {
              return false;
          }
          Instant ix = (Instant) x;
          Instant iy = (Instant) y;
          return ix.equals(iy);
      }
  
      public int hashCode(Object object) throws HibernateException {
          return object.hashCode();
      }
  
      public Object nullSafeGet(ResultSet resultSet, String[] names, Object object) throws HibernateException, SQLException {
          return nullSafeGet(resultSet, names[0]);
      }
  
      public Object nullSafeGet(ResultSet resultSet, String name) throws SQLException {
          Object value = StandardBasicTypes.TIMESTAMP.nullSafeGet(resultSet, name);
          if (value == null) {
              return null;
          }
          return new Instant(value);
      }
  
      public void nullSafeSet(PreparedStatement preparedStatement, Object value, int index) throws HibernateException, SQLException {
          if (value == null) {
              StandardBasicTypes.TIMESTAMP.nullSafeSet(preparedStatement, null, index);
          } else {
              StandardBasicTypes.TIMESTAMP.nullSafeSet(preparedStatement, ((Instant) value).toDate(), index);
          }
      }
  
      public Object deepCopy(Object value) throws HibernateException {
          return value;
      }
  
      public boolean isMutable() {
          return false;
      }
  
      public Serializable disassemble(Object value) throws HibernateException {
          return (Serializable) value;
      }
  
      public Object assemble(Serializable serializable, Object value) throws HibernateException {
          return serializable;
      }
  
     public Object replace(Object original, Object target, Object owner) throws HibernateException {
         return original;
     }
 
     // __________ EnhancedUserType ____________________
 
     public String objectToSQLString(Object object) {
         throw new UnsupportedOperationException();
     }
 
     public String toXMLString(Object object) {
         return object.toString();
     }
 
     public Object fromXMLString(String string) {
         return new Instant(string);
     }
 
 }