Java tutorial
/* * Copyright (c) 2015 www.see-r.com * All rights reserved * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package com.seer.datacruncher.spring; import com.seer.datacruncher.eventtrigger.DynamicClassLoader; import com.seer.datacruncher.jpa.ReadList; import com.seer.datacruncher.jpa.dao.DaoSet; import com.seer.datacruncher.utils.generic.I18n; import com.seer.datacruncher.validation.CustomCodeValidator; import org.apache.commons.collections.CollectionUtils; import org.apache.commons.io.FileUtils; import org.apache.commons.lang.ArrayUtils; import org.apache.commons.lang.StringUtils; import org.codehaus.jackson.map.ObjectMapper; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.mvc.Controller; import javax.servlet.ServletException; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.File; import java.io.IOException; public class ExtraCheckCustomCodeValidator implements Controller, DaoSet { public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String code = request.getParameter("value"); String name = request.getParameter("name"); String addReq = request.getParameter("addReq"); //TODO: take the result message from "locale" String result = null; ObjectMapper mapper = new ObjectMapper(); ServletOutputStream out = null; response.setContentType("application/json"); out = response.getOutputStream(); if (StringUtils.isEmpty(code) || StringUtils.isEmpty(name)) { result = I18n.getMessage("error.extracheck.invaliddata"); } else { name = name.trim(); if (addReq.equalsIgnoreCase("true")) { ReadList list = checksTypeDao.findCustomCodeByName(name); if (list != null && CollectionUtils.isNotEmpty(list.getResults())) { result = I18n.getMessage("error.extracheck.name.alreadyexist"); out.write(mapper.writeValueAsBytes(result)); out.flush(); out.close(); return null; } } try { File sourceDir = new File(System.getProperty("java.io.tmpdir"), "DataCruncher/src"); sourceDir.mkdirs(); String classNamePack = name.replace('.', File.separatorChar); String srcFilePath = sourceDir + "" + File.separatorChar + classNamePack + ".java"; File sourceFile = new File(srcFilePath); if (sourceFile.exists()) { sourceFile.delete(); } FileUtils.writeStringToFile(new File(srcFilePath), code); DynamicClassLoader dynacode = DynamicClassLoader.getInstance(); dynacode.addSourceDir(sourceDir); CustomCodeValidator customCodeValidator = (CustomCodeValidator) dynacode .newProxyInstance(CustomCodeValidator.class, name); boolean isValid = false; if (customCodeValidator != null) { Class clazz = dynacode.getLoadedClass(name); if (clazz != null) { Class[] interfaces = clazz.getInterfaces(); if (ArrayUtils.isNotEmpty(interfaces)) { for (Class clz : interfaces) { if ((clz.getName().equalsIgnoreCase( "com.seer.datacruncher.utils.validation.SingleValidation"))) { isValid = true; } } } } } if (isValid) { result = "Success"; } else { result = I18n.getMessage("error.extracheck.wrongimpl"); } } catch (Exception e) { result = "Failed. Reason:" + e.getMessage(); } } out.write(mapper.writeValueAsBytes(result)); out.flush(); out.close(); return null; } }