org.hdiv.web.servlet.support.ThymeleafHdivRequestDataValueProcessor.java Source code

Introduction

Here is the source code for org.hdiv.web.servlet.support.ThymeleafHdivRequestDataValueProcessor.java

Source

/**
 * Copyright 2005-2013 hdiv.org
 *
 * 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.hdiv.web.servlet.support;

import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.hdiv.dataComposer.IDataComposer;
import org.hdiv.urlProcessor.FormUrlProcessor;
import org.hdiv.util.Constants;
import org.hdiv.util.HDIVUtil;
import org.springframework.web.servlet.support.RequestDataValueProcessor;

/**
 * {@link RequestDataValueProcessor} implementation for Thymeleaf.
 * 
 * Method invocation order is different in Thymeleaf compared to Spring MVC.
 * <ol>
 * <li>processAction(..) method for form action</li>
 * <li>getExtraHiddenFields(..) method for extra hidden field</li>
 * <li>processFormFieldValue(..) method for each form field.</li>
 * </ol>
 */
public class ThymeleafHdivRequestDataValueProcessor extends HdivRequestDataValueProcessor {

    @Override
    public String processAction(HttpServletRequest request, String action, String method) {

        IDataComposer dataComposer = (IDataComposer) request.getAttribute(HDIVUtil.DATACOMPOSER_REQUEST_KEY);

        if (dataComposer != null && dataComposer.isRequestStarted()) {
            // End with the last form
            dataComposer.endRequest();
        }

        // Start with the new form
        return super.processAction(request, action, method);
    }

    public Map<String, String> getExtraHiddenFields(HttpServletRequest request) {

        IDataComposer dataComposer = (IDataComposer) request.getAttribute(HDIVUtil.DATACOMPOSER_REQUEST_KEY);
        Map<String, String> extraFields = new HashMap<String, String>();

        if (this.innerRequestDataValueProcessor != null) {
            Map<String, String> innerExtras = this.innerRequestDataValueProcessor.getExtraHiddenFields(request);
            if (innerExtras != null) {
                extraFields.putAll(innerExtras);
            }
        }

        if (dataComposer == null || dataComposer.isRequestStarted() == false) {
            return extraFields;
        }

        // Use the state id generated by the form action processing
        String formStateId = (String) request.getAttribute(FormUrlProcessor.FORM_STATE_ID);

        if (formStateId != null && formStateId.length() > 0) {
            String hdivStateParam = (String) request.getSession().getAttribute(Constants.HDIV_PARAMETER);
            extraFields.put(hdivStateParam, formStateId);
        }
        return extraFields;
    }
}