Package org.apache.cocoon.forms.acting

Source Code of org.apache.cocoon.forms.acting.HandleFormSubmitAction

/*
* 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.cocoon.forms.acting;

import org.apache.avalon.framework.parameters.Parameters;
import org.apache.cocoon.environment.Redirector;
import org.apache.cocoon.environment.SourceResolver;
import org.apache.cocoon.environment.Request;
import org.apache.cocoon.environment.ObjectModelHelper;
import org.apache.cocoon.forms.FormContext;
import org.apache.cocoon.forms.event.FormHandler;
import org.apache.cocoon.forms.formmodel.Form;
import org.apache.cocoon.i18n.I18nUtils;
import org.apache.cocoon.components.LifecycleHelper;
import org.apache.excalibur.source.Source;

import java.util.Map;
import java.util.Collections;
import java.util.Locale;

/**
* An action that will create a form instance, let it handle the current request (and
* do validation), and will return not-null if validation was successfully or null when
* validation failed. In both cases, the created form instance is stored in a request attribute,
* so that it can be picked up later on by other components.
*
* <p>Required parameters:
* <ul>
<li><strong>form-definition</strong>: filename (URL) pointing to the form definition file
<li><strong>attribute-name</strong>: name of the request attribute in which the form instance should be stored
* </ul>
*
* @version $Id: HandleFormSubmitAction.java 449149 2006-09-23 03:58:05Z crossley $
*/
public class HandleFormSubmitAction extends AbstractFormsAction {

    public Map act(Redirector redirector, SourceResolver resolver, Map objectModel, String src, Parameters parameters)
            throws Exception {
        String formSource = parameters.getParameter("form-definition");
        String formAttribute = parameters.getParameter("attribute-name");
        String formHandlerClassName = parameters.getParameter("formhandler", null);

        Locale locale = I18nUtils.parseLocale(parameters.getParameter("locale", null), Locale.getDefault());

        Source source = resolver.resolveURI(formSource);
        try {
            Form form = formManager.createForm(source);

            Request request = ObjectModelHelper.getRequest(objectModel);
            FormHandler formHandler = null;

            if (formHandlerClassName != null) {
                // TODO cache these classes
                Class clazz = Class.forName(formHandlerClassName);
                formHandler = (FormHandler)clazz.newInstance();
                LifecycleHelper.setupComponent(formHandler, null, null, manager, null);
                form.setFormHandler(formHandler);
            }

            FormContext formContext = new FormContext(request, locale);

            boolean finished = form.process(formContext);
            request.setAttribute(formAttribute, form);

            if (finished) {
                return Collections.EMPTY_MAP;
            }
            return null;
        } finally {
            resolver.release(source);
        }
    }
}
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