001    /*
002     *  Copyright 2001-2011 Stephen Colebourne
003     *
004     *  Licensed under the Apache License, Version 2.0 (the "License");
005     *  you may not use this file except in compliance with the License.
006     *  You may obtain a copy of the License at
007     *
008     *      http://www.apache.org/licenses/LICENSE-2.0
009     *
010     *  Unless required by applicable law or agreed to in writing, software
011     *  distributed under the License is distributed on an "AS IS" BASIS,
012     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     *  See the License for the specific language governing permissions and
014     *  limitations under the License.
015     */
016    package org.joda.time.contrib.hibernate;
017    
018    import java.io.Serializable;
019    import java.sql.PreparedStatement;
020    import java.sql.ResultSet;
021    import java.sql.SQLException;
022    import java.sql.Types;
023    
024    import org.hibernate.HibernateException;
025    import org.hibernate.type.StandardBasicTypes;
026    import org.hibernate.usertype.EnhancedUserType;
027    import org.joda.time.LocalDate;
028    
029    /**
030     * Persist {@link org.joda.time.LocalDate} via hibernate.
031     * 
032     * @author Mario Ivankovits (mario@ops.co.at)
033     */
034    public class PersistentLocalDate implements EnhancedUserType, Serializable {
035    
036        public static final PersistentLocalDate INSTANCE = new PersistentLocalDate();
037    
038        private static final int[] SQL_TYPES = new int[] { Types.DATE, };
039    
040        public int[] sqlTypes() {
041            return SQL_TYPES;
042        }
043    
044        public Class returnedClass() {
045            return LocalDate.class;
046        }
047    
048        public boolean equals(Object x, Object y) throws HibernateException {
049            if (x == y) {
050                return true;
051            }
052            if (x == null || y == null) {
053                return false;
054            }
055            LocalDate dtx = (LocalDate) x;
056            LocalDate dty = (LocalDate) y;
057            return dtx.equals(dty);
058        }
059    
060        public int hashCode(Object object) throws HibernateException {
061            return object.hashCode();
062        }
063    
064        public Object nullSafeGet(ResultSet resultSet, String[] strings, Object object) throws HibernateException, SQLException {
065            return nullSafeGet(resultSet, strings[0]);
066    
067        }
068    
069        public Object nullSafeGet(ResultSet resultSet, String string) throws SQLException {
070            Object timestamp = StandardBasicTypes.DATE.nullSafeGet(resultSet, string);
071            if (timestamp == null) {
072                return null;
073            }
074            return new LocalDate(timestamp);
075        }
076    
077        public void nullSafeSet(PreparedStatement preparedStatement, Object value, int index) throws HibernateException, SQLException {
078            if (value == null) {
079                StandardBasicTypes.DATE.nullSafeSet(preparedStatement, null, index);
080            } else {
081                StandardBasicTypes.DATE.nullSafeSet(preparedStatement, ((LocalDate) value).toDateTimeAtStartOfDay().toDate(), index);
082            }
083        }
084    
085        public Object deepCopy(Object value) throws HibernateException {
086            return value;
087        }
088    
089        public boolean isMutable() {
090            return false;
091        }
092    
093        public Serializable disassemble(Object value) throws HibernateException {
094            return (Serializable) value;
095        }
096    
097        public Object assemble(Serializable cached, Object value) throws HibernateException {
098            return cached;
099        }
100    
101        public Object replace(Object original, Object target, Object owner) throws HibernateException {
102            return original;
103        }
104    
105        public String objectToSQLString(Object object) {
106            throw new UnsupportedOperationException();
107        }
108    
109        public String toXMLString(Object object) {
110            return object.toString();
111        }
112    
113        public Object fromXMLString(String string) {
114            return new LocalDate(string);
115        }
116    
117    }