bookpriceinputvalidator.java

来自「主要是对串口驱动的的一些控制源码！！！ 在下载javacomm20-win32」· Java 代码 · 共 57 行

package de.fhm.jkf.bookshop.cl;
/*
 * <br><br><center><table border="1" width="80%"><hr>
 * <strong>
 * <a href="http://jkf.sourceforge.net">The JKF Project</a>
 * </strong>
 * <p>
 * Copyright (C) 2002 by Theodor Willax
 * <p>
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * <p>
 * This library 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
 * Lesser General Public License for more details.
 * <p>
 * You should have received a copy of the <a href="http://www.gnu.org/copyleft/lesser.html">
 * GNU Lesser General Public License</a> along with this library; if not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA  02111-1307  USA
 * <hr></table></center>
 */

import de.fhm.jkf.gui.InputValidator;
import de.fhm.jkf.gui.InputValidatorItem;
import de.fhm.jkf.gui.Validatable;

/**
 * Validates if a given <code>Object</code> represents a correct price.
 * 
 * @author Theodor Willax
 * @version $Revision: 1.5 $
 */
public class BookPriceInputValidator implements InputValidator {

	/**
	 * Validates if a correct price is given.
	 * 
	 * @see de.fhm.jkf.gui.InputValidator#validateInput(de.fhm.jkf.gui.Validatable)
	 */
	public InputValidatorItem validateInput(Validatable toValidate) {
		Object o = toValidate.getValidationInformation();
		try {
			Double.valueOf(o.toString());
		} catch (NumberFormatException e) {
			return new InputValidatorItem(
				toValidate,
				o.toString() + " is not a valid price");
		}
		return new InputValidatorItem(toValidate);
	}

}