isbnvalidator.java

一个使用struts+hibernate+spring开发的完的网站源代码。

/*
 * Copyright 2004 The Apache Software Foundation.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.myfaces.custom.isbnvalidator;

import org.apache.myfaces.util.MessageUtils;

import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.validator.Validator;
import javax.faces.validator.ValidatorException;

/**
 * @author <a href="mailto:[e-mail]">Matthias We�endorf</a> (latest modification by $Author: matzew $)
 * @version $Revision: 1.3 $ $Date: 2004/11/30 09:37:42 $
 * $Log: ISBNValidator.java,v $
 * Revision 1.3  2004/11/30 09:37:42  matzew
 * changes i18n-messages for validation
 *
 * Revision 1.2  2004/11/23 04:59:24  svieujot
 * Remove "unmappable character for encoding UTF8" warning.
 *
 * Revision 1.1  2004/11/20 20:17:05  matzew
 * added new validator for ISBN codes
 *
 */

public class ISBNValidator implements Validator {
	
	/**
	 * <p>The standard converter id for this converter.</p>
	 */
	public static final String 	VALIDATOR_ID 	   = "org.apache.myfaces.validator.ISBN";
	/**
	 * <p>The message identifier of the {@link FacesMessage} to be created if
	 * the maximum length check fails.</p>
	 */
	public static final String ISBN_MESSAGE_ID = "org.apache.myfaces.ISBN.INVALID";	
	
	/**
	 * <p>isbnValidator</p>
	 */
	private org.apache.commons.validator.ISBNValidator isbnValidator;
	
	public ISBNValidator(){
	    isbnValidator = new org.apache.commons.validator.ISBNValidator();
	}

	/**
	 * methode that validates isbn codes.
	 * it uses the commons-validator 
	 */
	public void validate(
		FacesContext facesContext,
		UIComponent uiComponent,
		Object value)
		throws ValidatorException {
	
	
			if (facesContext == null) throw new NullPointerException("facesContext");
			if (uiComponent == null) throw new NullPointerException("uiComponent");

			if (value == null)
			{
				return;
			}
			if (!isbnValidator.isValid( value.toString())) {
				Object[] args = {value.toString()};
				throw new ValidatorException(MessageUtils.getMessage(FacesMessage.SEVERITY_ERROR,ISBN_MESSAGE_ID, args));
				
			}

	}

}