I've created a UserType (see below) to handle a situation in our mySQL database where we've been saving null dates as 0000-00-00 00:00:00.
When I try and persist my entity with a null for dispDT (see below) it generates this exception: "javax.persistence.PersistenceException: org.hibernate.PropertyValueException: not-null property references a null or transient value: myEntity.dispDt"
By setting a breakpoint in every method in MySQLTimeStampUserType I can see it calls the deepCopy method and never calls the nullSafeSet method. I thought the whole point of the nuyllSafeSet method was to allow me to manipulate the value before persisting it. What am I doing wrong?
Code:
@Basic(optional = false)
@Column(name = "disp_dt")
@Type(type = "mypackage.MySQLTimeStampUserType")
// @Temporal(TemporalType.TIMESTAMP)
private Date dispDt;
Code:
public class MySQLTimeStampUserType implements UserType {
private static final int[] SQL_TYPES = {Types.TIMESTAMP};
public int[] sqlTypes() {
return SQL_TYPES;
}
public Class returnedClass() {
return Date.class;
}
public boolean equals(Object x, Object y) throws HibernateException {
if (x == y) {
return true;
} else if (x == null || y == null) {
return false;
} else {
return x.equals(y);
}
}
public int hashCode(Object arg0) throws HibernateException {
throw new UnsupportedOperationException("Not supported yet.");
}
public Object nullSafeGet(ResultSet resultSet, String[] names, Object owner) throws HibernateException, SQLException {
// if the date is 0000-00-00 00:00:00 return null, else return the timestamp
Date result = null;
if (!resultSet.wasNull()) {
if (!resultSet.getString(names[0]).equals("0000-00-00 00:00:00")) {
result = resultSet.getDate(names[0]);
}
}
return result;
}
public void nullSafeSet(PreparedStatement statement, Object value, int index) throws HibernateException, SQLException {
// if the date is null set the value to "0000-00-00 00:00:00" else save the timestamp
if (value == null) {
statement.setString(index, "0000-00-00 00:00:00");
} else {
statement.setTimestamp(index,(Timestamp) value);
}
}
public Object deepCopy(Object value) throws HibernateException {
return value;
}
public boolean isMutable() {
return false;
}
public Serializable disassemble(Object value) throws HibernateException {
throw new UnsupportedOperationException("Not supported yet.");
}
public Object assemble(Serializable cached, Object owner) throws HibernateException {
throw new UnsupportedOperationException("Not supported yet.");
}
public Object replace(Object original, Object target, Object owner) throws HibernateException {
return original;
}
}
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