com.seer.datacruncher.spring.MacrosValidateController.java Source code

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Here is the source code for com.seer.datacruncher.spring.MacrosValidateController.java

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/*
 * 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.macros.JEXLFieldFactory;
import com.seer.datacruncher.macros.JexlEngineFactory;
import com.seer.datacruncher.utils.generic.I18n;
import com.seer.datacruncher.validation.MacroRulesValidation;
import org.apache.commons.jexl2.Expression;
import org.apache.commons.jexl2.JexlContext;
import org.apache.commons.jexl2.JexlEngine;
import org.apache.commons.jexl2.MapContext;
import org.json.JSONObject;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class MacrosValidateController implements Controller {

    public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        String varList = request.getParameter("varList");
        String rule = request.getParameter("rule");
        Long schemaId = Long.valueOf(request.getParameter("schemaId"));
        if (rule == null) {
            throw new IllegalArgumentException("MacrosValidateController: null parameter 'rule'");
        }
        String success = "true";
        Map<String, String> resMap = new HashMap<String, String>();
        if (rule.trim().isEmpty()) {
            success = "false";
            resMap.put("errMsg", I18n.getMessage("error.macro.emptyRule"));
        }
        Pattern pattern = Pattern.compile(MacroRulesValidation.MACRO_SQL_VALIDATOR_PATTERN,
                Pattern.CASE_INSENSITIVE);
        Matcher matcher = pattern.matcher(rule);
        rule = matcher.replaceAll("true");
        List<Map<String, String>> list = MacroRulesValidation.parseVars(varList);
        MacroRulesValidation.combineVariableLists(list, schemaId);
        JexlEngine jexl = JexlEngineFactory.getInstance();
        try {
            Expression e = jexl.createExpression(rule);
            JexlContext context = new MapContext();
            for (Map<String, String> m : list) {
                String anyStringDigit = "7";
                context.set(m.get("uniqueName"),
                        JEXLFieldFactory.getField(m.get("fieldType"), anyStringDigit).getValue());
            }
            e.evaluate(context);
        } catch (Exception e1) {
            success = "false";
            resMap.put("errMsg", e1.getMessage() + "\n" + getStackTrace(e1));
        }
        resMap.put("success", success);
        response.getWriter().print(new JSONObject(resMap).toString());
        return null;
    }

    private static String getStackTrace(Throwable throwable) {
        Writer writer = new StringWriter();
        PrintWriter printWriter = new PrintWriter(writer);
        throwable.printStackTrace(printWriter);
        return writer.toString();
    }
}