DoublePoemType.java
- /*
- * $Source$
- * $Revision$
- *
- * Copyright (C) 2000 William Chesters
- *
- * Part of Melati (http://melati.org), a framework for the rapid
- * development of clean, maintainable web applications.
- *
- * Melati is free software; Permission is granted to copy, distribute
- * and/or modify this software under the terms either:
- *
- * a) 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,
- *
- * or
- *
- * b) any version of the Melati Software License, as published
- * at http://melati.org
- *
- * You should have received a copy of the GNU General Public License and
- * the Melati Software License along with this program;
- * if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA to obtain the
- * GNU General Public License and visit http://melati.org to obtain the
- * Melati Software License.
- *
- * Feel free to contact the Developers of Melati (http://melati.org),
- * if you would like to work out a different arrangement than the options
- * outlined here. It is our intention to allow Melati to be used by as
- * wide an audience as possible.
- *
- * This program 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.
- *
- * Contact details for copyright holder:
- *
- * William Chesters <williamc At paneris.org>
- * http://paneris.org/~williamc
- * Obrechtstraat 114, 2517VX Den Haag, The Netherlands
- */
- package org.melati.poem;
- import java.sql.Types;
- import java.sql.ResultSet;
- import java.sql.PreparedStatement;
- import java.sql.SQLException;
- /**
- * Normal doubles, dependant upon the database/SQL implementation.
- */
- public class DoublePoemType extends AtomPoemType<Double> {
- /** The nullable instance. */
- public static final DoublePoemType it = new DoublePoemType(true);
-
- /**
- * Constructor.
- * @param nullable whether null is an allowed value
- */
- public DoublePoemType(boolean nullable) {
- super(Types.DOUBLE, "DOUBLE PRECISION", nullable);
- }
- protected void _assertValidRaw(Object raw) {
- if (raw != null && !(raw instanceof Double))
- throw new TypeMismatchPoemException(raw, this);
- }
- protected Double _getRaw(ResultSet rs, int col) throws SQLException {
- synchronized (rs) {
- double x = rs.getDouble(col);
- return rs.wasNull() ? null : new Double(x); }
- }
- protected void _setRaw(PreparedStatement ps, int col, Object real)
- throws SQLException {
- ps.setDouble(col, ((Double)real).doubleValue());
- }
- protected Double _rawOfString(String rawString)
- throws ParsingPoemException {
- try {
- return new Double(rawString);
- }
- catch (NumberFormatException e) {
- throw new ParsingPoemException(this, rawString, e);
- }
- }
- protected boolean _canRepresent(SQLPoemType<?> other) {
- return sqlTypeCode() == other.sqlTypeCode() &&
- other instanceof DoublePoemType;
- }
- /**
- * {@inheritDoc}
- * @see org.melati.poem.PoemType#toDsdType()
- */
- public String toDsdType() {
- return "Double";
- }
- protected void _saveColumnInfo(ColumnInfo columnInfo)
- throws AccessPoemException {
- columnInfo.setTypefactory(PoemTypeFactory.DOUBLE);
- }
- }