edu.harvard.med.screensaver.db.usertypes.LocalDateType.java Source code

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Here is the source code for edu.harvard.med.screensaver.db.usertypes.LocalDateType.java

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//$HeadURL$
//$Id$

//Copyright  2006, 2010, 2011, 2012 by the President and Fellows of Harvard College.

//Screensaver is an open-source project developed by the ICCB-L and NSRB labs
//at Harvard Medical School. This software is distributed under the terms of
//the GNU General Public License.

package edu.harvard.med.screensaver.db.usertypes;

import java.io.Serializable;
import java.sql.Date;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;

import org.apache.log4j.Logger;
import org.hibernate.Hibernate;
import org.hibernate.HibernateException;
import org.hibernate.usertype.UserType;
import org.joda.time.LocalDate;

public class LocalDateType implements UserType {
    // static members

    private static Logger log = Logger.getLogger(LocalDateType.class);

    private static final int[] SQL_TYPES = new int[] { Types.DATE };

    public int[] sqlTypes() {
        return SQL_TYPES;
    }

    public Class returnedClass() {
        return LocalDate.class;
    }

    public boolean equals(Object x, Object y) throws HibernateException {
        if (x == y) {
            return true;
        }
        if (x == null || y == null) {
            return false;
        }
        LocalDate dtx = (LocalDate) x;
        LocalDate dty = (LocalDate) y;

        return dtx.equals(dty);
    }

    public int hashCode(Object object) throws HibernateException {
        return object.hashCode();
    }

    public Object nullSafeGet(ResultSet rs, String[] names, Object owner) throws HibernateException, SQLException {
        Date sqlDate = rs.getDate(names[0]);
        // Deferred check after first read
        if (rs.wasNull())
            return null;
        LocalDate localDate = new LocalDate(sqlDate);
        //    assert sqlDate.toString().equals(localDate.toString()) : "date conversion failed: " + sqlDate.toString() +"," + localDate.toString();
        return localDate;
    }

    public void nullSafeSet(PreparedStatement st, Object value, int index) throws HibernateException, SQLException {
        if (value == null) {
            st.setNull(index, Hibernate.DATE.sqlType());
        } else {
            LocalDate localDate = (LocalDate) value;
            /* This is WRONG! Fails for ranges [2008-03-09,2008-04-06] and [2008-10-26,2008-11-02], which are the dates between the old and nw Daylight Savings times!!!
            Date sqlDate = new Date(((LocalDate) value).toDateMidnight().getMillis());
             */
            Date sqlDate = Date.valueOf(localDate.toString());
            assert sqlDate.toString().equals(localDate.toString()) : "date conversion failed";
            st.setDate(index, sqlDate);
        }
    }

    public Object deepCopy(Object value) throws HibernateException {
        if (value == null) {
            return null;
        }

        return new LocalDate(value);
    }

    public boolean isMutable() {
        return false;
    }

    public Serializable disassemble(Object value) throws HibernateException {
        return (Serializable) value;
    }

    public Object assemble(Serializable cached, Object value) throws HibernateException {
        return cached;
    }

    public Object replace(Object original, Object target, Object owner) throws HibernateException {
        return original;
    }
}