egovframework.rte.ptl.mvc.bind.CommandMapArgumentResolver.java Source code

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Here is the source code for egovframework.rte.ptl.mvc.bind.CommandMapArgumentResolver.java

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/*
 * Copyright 2008-2009 MOPAS(Ministry of Public Administration and Security).
 *
 * 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 egovframework.rte.ptl.mvc.bind;

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

import javax.servlet.http.HttpServletRequest;

import org.springframework.core.MethodParameter;
import org.springframework.web.bind.support.WebArgumentResolver;
import org.springframework.web.context.request.NativeWebRequest;

/**
 * CommandMapArgumentResolver.java
 * <p><b>NOTE:</b> <pre> Controller? (JSP) ?   ?? Command(Form Class) ? , Map ?    .
 * Sping MVC Controller? argument ? argument? customizing    WebArgumentResolver? interface .
 * CommandMapArgumentResolver WebArgumentResolver?  ??.
 * CommandMapArgumentResolver Controller ? argument? commandMap?? Map ? 
 * HTTP request ??  ?? ? commandMap? .</b>
 *                </pre>
 * @author   
 * @since 2009.06.01
 * @version 1.0
 * @see
 *
 * <pre>
 * << ?(Modification Information) >>
 *   
 *   ?      ?           
 *  -------    --------    ---------------------------
 *   2009.05.30               ?
 *
 * </pre>
 */
public class CommandMapArgumentResolver implements WebArgumentResolver {

    /**
     * Controller?  argument? commandMap?? Map ?  
     * HTTP request ??  ?? ? commandMap?  returng.
     * ? ? ?  Map? .
     * 
     * @param methodParameter -  ?? ,???  
     * @param webRequest - web request ?
     * @return argument? commandMap(java.util.Map)?  commandMap, <code>UNRESOLVED</code>.
     * @exception Exception
     */
    public Object resolveArgument(MethodParameter methodParameter, NativeWebRequest webRequest) throws Exception {

        Class<?> clazz = methodParameter.getParameterType();
        String paramName = methodParameter.getParameterName();

        if (clazz.equals(Map.class) && paramName.equals("commandMap")) {

            Map<String, Object> commandMap = new HashMap<String, Object>();
            HttpServletRequest request = (HttpServletRequest) webRequest.getNativeRequest();
            Enumeration<?> enumeration = request.getParameterNames();

            while (enumeration.hasMoreElements()) {
                String key = (String) enumeration.nextElement();
                String[] values = request.getParameterValues(key);
                if (values != null) {
                    commandMap.put(key, (values.length > 1) ? values : values[0]);
                }
            }
            return commandMap;
        }
        return UNRESOLVED;
    }
}