Application: gvSIG desktop » Library: org.gvsig.tools

/* gvSIG. Desktop Geographic Information System.

 *

 * Copyright ? 2007-2013 gvSIG Association

 *

 * This program 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.

 *

 * 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.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.tools.dataTypes.impl.coercion;

import java.sql.Timestamp;

import org.gvsig.tools.dataTypes.CoercionException;

import org.gvsig.tools.dataTypes.DataTypesManager.Coercion;

/**

 * Utility class to force instantiation of Timestamp objects.

 * If a plugin provides a datasource with a timestamp type which

 * is not java.sql.Timestamp, then the plugin will have

 * to perform a conversion or coercion between

 * its Timestamp type and java.sql.Timestamp if it's not automatic.

 * 

 * Postgresql JDBC uses java.sql.Timestamp, so no problem

 * 

 * Oracle uses oracle.sql.TIMESTAMP which is automatically

 * converted, so this coercion is enough

 * 

 * @author jldominguez

 *

 */

public class CoerceToTimestamp extends CoerceToTime {

    public static final String NOW_STRING = "now";

    public Object coerce(Object value) throws CoercionException {

        if (value instanceof Timestamp) {

            return value;

        } else {

            String str = value.toString();

            Timestamp resp = null;

            // ----------- (1) Try normal parsing

            try {

                resp = Timestamp.valueOf(str); 

            } catch (Exception ex) {

                resp = null;

            }

            if (resp != null) {

                return resp;

            }

            // ----------- (2) Try parsing milliseconds

            try {

                long ms = Long.parseLong(str.trim());

                resp = new Timestamp(ms); 

            } catch (Exception ex) {

                resp = null;

            }

            if (resp != null) {

                return resp;

            }

            // ----------- (3) Accept "now"

            if (NOW_STRING.compareToIgnoreCase(str.trim()) == 0) {

                resp = new Timestamp(System.currentTimeMillis());

            }

            if (resp != null) {

                return resp;

            }

            /*

             * Finally try as time

             */

            return super.coerce(value);

        }

    }

}