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

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 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.util.Date;

import org.gvsig.tools.dataTypes.AbstractCoercion;

import org.gvsig.tools.dataTypes.CoercionException;

import org.gvsig.tools.dataTypes.CoercionContext;

@SuppressWarnings("UseSpecificCatch")

public class CoerceToLong extends AbstractCoercion {

  @Override

  public Object coerce(Object value, CoercionContext context) throws CoercionException {

    if (value == null || value instanceof Long) {

      return value;

    }

    Long num;

    try {

      if (value instanceof Number) {

        num = ((Number) value).longValue();

      } else if (value instanceof Boolean) {

        num = ((boolean) value ? 1l : 0l);

      } else if (value instanceof Date) {

        num = ((Date) value).getTime();

      } else {

        String s = value.toString();

        if (s == null) {

          return null;

        }

        s = s.trim().toLowerCase();

        if (s.length() == 0) {

          return null;

        }

        if (s.startsWith("0x")) {

          num = Long.valueOf(s.substring(2), 16);

        } else {

          if (s.startsWith("+")) {

            s = s.substring(1);

          }

          num = Long.valueOf(s);

        }

      }

      return num;

    } catch (Exception e) {

      throw new CoercionException("Can't coerce '" + value.toString() + "' to long.", e);

    }

  }

}