net.ymate.platform.mvc.web.support.MultipartRequestWrapper.java Source code

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Here is the source code for net.ymate.platform.mvc.web.support.MultipartRequestWrapper.java

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/*
 * Copyright 2007-2107 the original author or authors.
 *
 * 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 net.ymate.platform.mvc.web.support;

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

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;

import net.ymate.platform.mvc.web.IUploadFileWrapper;
import net.ymate.platform.mvc.web.IWebMultipartHandler;
import net.ymate.platform.mvc.web.WebMVC;
import net.ymate.platform.mvc.web.annotation.FileUpload;
import net.ymate.platform.mvc.web.impl.DefaultWebMultipartHandler;

import org.apache.commons.lang.StringUtils;

/**
 * <p>
 * MultipartRequestWrapper
 * </p>
 * <p>
 * "multipart/form-data"?
 * </p>
 * 
 * @author (suninformation@163.com)
 * @version 0.0.0
 *          <table style="border:1px solid gray;">
 *          <tr>
 *          <th width="100px">?</th><th width="100px"></th><th
 *          width="100px"></th><th width="100px"></th>
 *          </tr>
 *          <!--  Table ?? -->
 *          <tr>
 *          <td>0.0.0</td>
 *          <td></td>
 *          <td></td>
 *          <td>2011-8-5?10:19:47</td>
 *          </tr>
 *          </table>
 */
public class MultipartRequestWrapper extends HttpServletRequestWrapper {

    private IWebMultipartHandler __handler;

    /**
     * 
     * @param request 
     * @param upload 
     * @throws Exception 
     */
    public MultipartRequestWrapper(HttpServletRequest request, FileUpload upload) throws Exception {
        super(request);
        __handler = WebMVC.getConfig().getMultipartHandlerClassImpl();
        if (__handler == null) {
            __handler = new DefaultWebMultipartHandler();
        }
        __handler.doHandler(upload);
    }

    /* (non-Javadoc)
     * @see javax.servlet.ServletRequestWrapper#getParameter(java.lang.String)
     */
    public String getParameter(String name) {
        String _returnStr = super.getParameter(name);
        if (StringUtils.isBlank(_returnStr)) {
            String[] params = __handler.getFieldMap().get(name);
            _returnStr = (params == null ? null : params[0]);
        }
        return _returnStr;
    }

    /* (non-Javadoc)
     * @see javax.servlet.ServletRequestWrapper#getParameterValues(java.lang.String)
     */
    public String[] getParameterValues(String name) {
        String[] _returnStr = super.getParameterValues(name);
        if (_returnStr == null || _returnStr.length == 0) {
            _returnStr = __handler.getFieldMap().get(name);
        }
        return _returnStr;
    }

    /* (non-Javadoc)
     * @see javax.servlet.ServletRequestWrapper#getParameterMap()
     */
    public Map<String, String[]> getParameterMap() {
        @SuppressWarnings("unchecked")
        Map<String, String[]> _returnMap = new HashMap<String, String[]>(super.getParameterMap());
        _returnMap.putAll(__handler.getFieldMap());
        return Collections.unmodifiableMap(_returnMap);
    }

    /* (non-Javadoc)
     * @see javax.servlet.ServletRequestWrapper#getParameterNames()
     */
    public Enumeration<String> getParameterNames() {
        Enumeration<String> names = new Enumeration<String>() {
            private Iterator<String> it = getParameterMap().keySet().iterator();

            public boolean hasMoreElements() {
                return it.hasNext();
            }

            public String nextElement() {
                return it.next();
            }
        };
        return names;
    }

    /**
     * @param name ??
     * @return ?
     */
    public IUploadFileWrapper getFile(String name) {
        IUploadFileWrapper[] files = __handler.getFileMap().get(name);
        return files == null ? null : files[0];
    }

    /**
     * @param name ??
     * @return ?
     */
    public IUploadFileWrapper[] getFiles(String name) {
        return __handler.getFileMap().get(name);
    }

}