dynavalidatoractionform.java

这是一个轻便的j2ee的web应用框架,是一个在多个项目中运用的实际框架,采用struts,hebinate,xml等技术,有丰富的tag,role,navigation,session,dictio

/*
 * $Header: /sfroot/cvs/esimple/src/core/org/apache/struts/validator/DynaValidatorActionForm.java,v 1.1.1.1 2004/09/08 06:38:45 lava Exp $
 * $Revision: 1.1.1.1 $
 * $Date: 2004/09/08 06:38:45 $
 *
 * ====================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999-2003 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Struts", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact [e-mail].
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */


package org.apache.struts.validator;

import java.io.Serializable;
import java.util.Map;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;

import org.apache.commons.beanutils.DynaBean;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.validator.Validator;
import org.apache.commons.validator.ValidatorException;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionMapping;


/**
 * <p>This class extends <strong>DynaValidatorForm</strong> and provides
 * basic field validation based on an XML file.  The key passed into the
 * validator is the action element's 'path' attribute from the
 * struts-config.xml which should match the form element's name attribute
 * in the validation.xml.</p>
 *
 * <ul><li>See <code>ValidatorPlugin</code> definition in struts-config.xml
 * for validation rules.</li></ul>
 *
 * @author David Winterfeldt
 * @version $Revision: 1.1.1.1 $ $Date: 2004/09/08 06:38:45 $
 * @since Struts 1.1
 */
public class DynaValidatorActionForm extends DynaValidatorForm implements DynaBean, Serializable {

    /**
     * Commons Logging instance.
     */
    private static Log log = LogFactory.getLog(DynaValidatorActionForm.class);

    /**
     * Validate the properties that have been set from this HTTP request,
     * and return an <code>ActionErrors</code> object that encapsulates any
     * validation errors that have been found.  If no errors are found, return
     * <code>null</code> or an <code>ActionErrors</code> object with no
     * recorded error messages.
     *
     * @param mapping The mapping used to select this instance.
     * @param request The servlet request we are processing.
     * @return ActionErrors containing validation errors.
     */
    public ActionErrors validate(ActionMapping mapping, HttpServletRequest request) {
        // set the page variable before validating
        Map props = this.getMap();
        if (props.containsKey("page")) {
            this.page = ((Integer) props.get("page")).intValue();
        }
        
        ServletContext application = getServlet().getServletContext();
        ActionErrors errors = new ActionErrors();

        Validator validator =
            Resources.initValidator(mapping.getPath(), this, application, request, errors, page);

        try {
            validatorResults = validator.validate();
        } catch (ValidatorException e) {
            log.error(e.getMessage(), e);
        }

        return errors;
    }

}