code: /*******************************************************************************
   * Copyright 2018 572682
   * 
   * 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 us.dot.its.jpo.ode.util;
  
  import java.lang.reflect.Field;
  import java.net.URL;
  import java.net.URLClassLoader;
  import java.util.ArrayList;
  import java.util.List;
  
  public class CommonUtils {
      
      private CommonUtils() {}
      
      /**
       * Wrapper method for System.getenv()
      * @param name Variable name
      */
     public static String getEnvironmentVariable(String name) {
         return System.getenv(name);
      }
     
     public static long getPidOfProcess(Process p) {
        long pid = -1;
  
        try {
          if (p.getClass().getName().equals("java.lang.UNIXProcess")) {	//NOSONAR
            Field f = p.getClass().getDeclaredField("pid");
            f.setAccessible(true);
            pid = f.getLong(p);
            f.setAccessible(false);
          }
        } catch (Exception e) {
          pid = -1;
        }
        return pid;
      }
  
     public static List<URL> getClasspath() {
  	   ArrayList<URL> classpath = new ArrayList<>();
  	   
         ClassLoader cl = ClassLoader.getSystemClassLoader();
  
         URL[] urls = ((URLClassLoader)cl).getURLs();
  
         for(URL url: urls){
      	   classpath.add(url);
         }
         
         return classpath;
     }
     
     public static String enumToString(Class<?> clazz, String enumNameOrOrdinal) {
       
       String enumName = null;
       try {
         Object[] enumConstants = clazz.getEnumConstants();
         if (enumConstants != null) {
           int enumOrdinal = Integer.parseInt(enumNameOrOrdinal);
           enumName = enumConstants[enumOrdinal].toString();
         }
       } catch (NumberFormatException e) {
         enumName = enumNameOrOrdinal;
       }
       return enumName;
     }
  }
  