/*
 * Copyright 2010 LinkedIn, Inc
 * 
 * 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 azkaban.webapp.servlet;

import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

public class MultipartParser {

    private DiskFileItemFactory _uploadItemFactory;

    public MultipartParser(int spillToDiskSize) {
        _uploadItemFactory = new DiskFileItemFactory();
        _uploadItemFactory.setSizeThreshold(spillToDiskSize);
    }

    @SuppressWarnings("unchecked")
	public Map<String, Object> parseMultipart(HttpServletRequest request) throws IOException,
            ServletException {
        ServletFileUpload upload = new ServletFileUpload(_uploadItemFactory);
        List<FileItem> items = null;
        try {
            items = upload.parseRequest(request);
        } catch(FileUploadException e) {
            throw new ServletException(e);
        }

        Map<String, Object> params = new HashMap<String, Object>();
        for(FileItem item: items) {
            if(item.isFormField())
                params.put(item.getFieldName(), item.getString());
            else
                params.put(item.getFieldName(), item);
        }
        return params;
    }

}
