org.photovault.persistence.UUIDUserType.java Source code

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Here is the source code for org.photovault.persistence.UUIDUserType.java

Source

/*
  Copyright (c) 2007 Harri Kaimio
     
  This file is part of Photovault.
     
  Photovault is free software; you can redistribute it and/or modify it
  under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.
     
  Photovault is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  General Public License for more details.
     
  You should have received a copy of the GNU General Public License
  along with Photovault; if not, write to the Free Software Foundation,
  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 */
package org.photovault.persistence;

import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.UUID;
import org.hibernate.Hibernate;
import org.hibernate.HibernateException;
import org.hibernate.usertype.UserType;

/**
  Hibernate type mapping for UUID. 
 */
public class UUIDUserType implements UserType {

    /** Creates a new instance of UUIDUserType */
    public UUIDUserType() {
    }

    public int[] sqlTypes() {
        return new int[] { Hibernate.STRING.sqlType() };
    }

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

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

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

    public Object nullSafeGet(ResultSet rs, String[] names, Object owner) throws HibernateException, SQLException {
        String strUUID = rs.getString(names[0]);
        if (rs.wasNull()) {
            return null;
        }
        UUID uuid = UUID.fromString(strUUID);
        return uuid;
    }

    public void nullSafeSet(PreparedStatement statement, Object value, int index)
            throws HibernateException, SQLException {
        if (value == null) {
            statement.setNull(index, Hibernate.STRING.sqlType());
        } else {
            String strUuid = value.toString();
            statement.setString(index, strUuid);
        }
    }

    public Object deepCopy(Object object) throws HibernateException {
        return object;
    }

    public boolean isMutable() {
        return false;
    }

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

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

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

}