package hypernova.model.persistence;

import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.UUID;

import org.hibernate.HibernateException;
import org.hibernate.usertype.UserType;

public class UUIDUserType implements UserType {

	@SuppressWarnings("unchecked")
	public Class returnedClass() {
		return UUID.class;
	}

	public int[] sqlTypes() {
		return new int[] {
			Types.OTHER
		};
	}

	public boolean equals(Object x, Object y) throws HibernateException {
		return (x == y) || (x != null && y != null && (x.equals(y)));
	}

	public Object nullSafeGet(ResultSet rs, String[] names, Object owner)
			throws HibernateException, SQLException {
		return rs.getObject(names[0]);
	}

	public void nullSafeSet(PreparedStatement st, Object value, int index)
			throws HibernateException, SQLException {
		if (value == null) {
			st.setNull(index, Types.OTHER);
			return;
		} else {
			st.setObject(index, value);
		}
	}

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

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

	// UUID is immutable, so we do not copy it actually
	public Object deepCopy(Object value) throws HibernateException {
		return (UUID) value;
	}

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

	public boolean isMutable() {
		return false;
	}

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

}