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1   /*
2    *  Copyright 2001-2011 Stephen Colebourne
3    *
4    *  Licensed under the Apache License, Version 2.0 (the "License");
5    *  you may not use this file except in compliance with the License.
6    *  You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   *  Unless required by applicable law or agreed to in writing, software
11   *  distributed under the License is distributed on an "AS IS" BASIS,
12   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   *  See the License for the specific language governing permissions and
14   *  limitations under the License.
15   */
16  package org.joda.time.contrib.hibernate;
17  
18  import java.io.Serializable;
19  import java.sql.PreparedStatement;
20  import java.sql.ResultSet;
21  import java.sql.SQLException;
22  import java.sql.Types;
23  
24  import org.hibernate.HibernateException;
25  import org.hibernate.type.StandardBasicTypes;
26  import org.hibernate.usertype.EnhancedUserType;
27  import org.joda.time.Instant;
28  
29  /**
30   * Persist {@link org.joda.time.Instant} via hibernate as a TIMESTAMP.
31   * 
32   * @author Olav Reinert (oreinert@sourceforge.net)
33   */
34  public class PersistentInstant implements EnhancedUserType {
35  
36      public static final PersistentInstant INSTANCE = new PersistentInstant();
37  
38      private static final int[] SQL_TYPES = new int[] { Types.TIMESTAMP };
39  
40      public int[] sqlTypes() {
41          return SQL_TYPES;
42      }
43  
44      public Class returnedClass() {
45          return Instant.class;
46      }
47  
48      public boolean equals(Object x, Object y) throws HibernateException {
49          if (x == y) {
50              return true;
51          }
52          if (x == null || y == null) {
53              return false;
54          }
55          Instant ix = (Instant) x;
56          Instant iy = (Instant) y;
57          return ix.equals(iy);
58      }
59  
60      public int hashCode(Object object) throws HibernateException {
61          return object.hashCode();
62      }
63  
64      public Object nullSafeGet(ResultSet resultSet, String[] names, Object object) throws HibernateException, SQLException {
65          return nullSafeGet(resultSet, names[0]);
66      }
67  
68      public Object nullSafeGet(ResultSet resultSet, String name) throws SQLException {
69          Object value = StandardBasicTypes.TIMESTAMP.nullSafeGet(resultSet, name);
70          if (value == null) {
71              return null;
72          }
73          return new Instant(value);
74      }
75  
76      public void nullSafeSet(PreparedStatement preparedStatement, Object value, int index) throws HibernateException, SQLException {
77          if (value == null) {
78              StandardBasicTypes.TIMESTAMP.nullSafeSet(preparedStatement, null, index);
79          } else {
80              StandardBasicTypes.TIMESTAMP.nullSafeSet(preparedStatement, ((Instant) value).toDate(), index);
81          }
82      }
83  
84      public Object deepCopy(Object value) throws HibernateException {
85          return value;
86      }
87  
88      public boolean isMutable() {
89          return false;
90      }
91  
92      public Serializable disassemble(Object value) throws HibernateException {
93          return (Serializable) value;
94      }
95  
96      public Object assemble(Serializable serializable, Object value) throws HibernateException {
97          return serializable;
98      }
99  
100     public Object replace(Object original, Object target, Object owner) throws HibernateException {
101         return original;
102     }
103 
104     // __________ EnhancedUserType ____________________
105 
106     public String objectToSQLString(Object object) {
107         throw new UnsupportedOperationException();
108     }
109 
110     public String toXMLString(Object object) {
111         return object.toString();
112     }
113 
114     public Object fromXMLString(String string) {
115         return new Instant(string);
116     }
117 
118 }