FieldGenController.java example

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/**
 * The contents of this file are subject to the OpenMRS Public License
 * Version 1.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://license.openmrs.org
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations
 * under the License.
 *
 * Copyright (C) OpenMRS, LLC.  All Rights Reserved.
 */
package org.openmrs.web.controller;

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

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;

public class FieldGenController implements Controller {
	
	protected Log log = LogFactory.getLog(this.getClass());
	
	@SuppressWarnings("unchecked")
	public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException,
	        IOException {
		
		// find the field that was identified in the openmrs:fieldGen taglib
		Object uri = request.getAttribute("javax.servlet.include.servlet_path.fieldGen");
		if (uri == null)
			uri = request.getAttribute("javax.servlet.include.servlet_path");
		String fieldGenPath = "";
		Map<String, Object> model = new HashMap<String, Object>();
		
		if (uri != null) {
			fieldGenPath = uri.toString();
			
			// Allowable extensions are '' (no extension) and '.field'
			if (fieldGenPath.endsWith("field"))
				fieldGenPath = fieldGenPath.replace(".field", "");
			else if (fieldGenPath.endsWith("jsp"))
				throw new ServletException(
				        "Illegal extension used for fieldGen: '.jsp'. Allowable extensions are '' (no extension) and '.field'");
			
			String type = (String) request.getAttribute("org.openmrs.fieldGen.type");
			String formFieldName = (String) request.getAttribute("org.openmrs.fieldGen.formFieldName");
			//String startVal = (String)request.getAttribute("org.openmrs.fieldGen.startVal");
			Map<String, Object> params = (Map<String, Object>) request.getAttribute("org.openmrs.fieldGen.parameters");
			Map<String, Object> moreParams = (Map<String, Object>) request.getAttribute("org.openmrs.fieldGen.parameterMap");
			
			model.put("type", type);
			model.put("formFieldName", formFieldName);
			model.put("obj", request.getAttribute("org.openmrs.fieldGen.object"));
			model.put("request", request.getAttribute("org.openmrs.fieldGen.request"));
			model.putAll(params);
			if (moreParams != null) {
				model.putAll(moreParams);
			}
			
			request.removeAttribute("org.openmrs.fieldGen.type");
			request.removeAttribute("org.openmrs.fieldGen.formFieldName");
			request.removeAttribute("org.openmrs.fieldGen.object");
			request.removeAttribute("org.openmrs.fieldGen.parameters");
			request.removeAttribute("org.openmrs.fieldGen.parameterMap");
		}
		
		return new ModelAndView(fieldGenPath, "model", model);
		
	}
}