Package org.apache.struts.chain.commands.servlet

Source Code of org.apache.struts.chain.commands.servlet.ValidateActionForm

/*
* $Id: ValidateActionForm.java 471754 2006-11-06 14:55:09Z husted $
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you 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.struts.chain.commands.servlet;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.chain.commands.AbstractValidateActionForm;
import org.apache.struts.chain.contexts.ActionContext;
import org.apache.struts.chain.contexts.ServletActionContext;
import org.apache.struts.config.ActionConfig;

/**
* <p>Validate the properties of the form bean for this request.  If there are
* any validation errors, execute the child commands in our chain; otherwise,
* proceed normally.  Also, if any errors are found and the request is a
* multipart request, rollback the <code>MultipartRequestHandler</code>.</p>
*
* @version $Rev: 471754 $ $Date: 2005-06-04 10:58:46 -0400 (Sat, 04 Jun 2005)
*          $
*/
public class ValidateActionForm extends AbstractValidateActionForm {
    // ------------------------------------------------------ Instance Variables
    private static final Log log = LogFactory.getLog(ValidateActionForm.class);

    // ------------------------------------------------------- Protected Methods

    /**
     * <p>Call the <code>validate()</code> method of the specified form bean,
     * and return the resulting <code>ActionErrors</code> object.</p>
     *
     * @param context    The context for this request
     * @param actionForm The form bean for this request
     */
    protected ActionErrors validate(ActionContext context,
        ActionConfig actionConfig, ActionForm actionForm) {
        ServletActionContext saContext = (ServletActionContext) context;
        ActionErrors errors =
            (actionForm.validate((ActionMapping) actionConfig,
                saContext.getRequest()));

        // Special handling for multipart request
        if ((errors != null) && !errors.isEmpty()) {
            if (actionForm.getMultipartRequestHandler() != null) {
                if (log.isTraceEnabled()) {
                    log.trace("  Rolling back multipart request");
                }

                actionForm.getMultipartRequestHandler().rollback();
            }
        }

        return errors;
    }
}
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