I am writing a calculator that loads all the classes needed through maven dependencies dynamically.such as slf4j,... but i have a problem.since i don't want to set my class path to manifest,my customClassLoader does it itself. but my logger is a private static final field and JVM want to load it before i call my customClassLoader and i get error!what can i do?
public class Calculator{
private List<String> expressions = new ArrayList<String>() ;
private List<String> results = new ArrayList<String>();
private final Logger logger = LoggerFactory.getLogger(Calculator.class);
public Calculator(){
//System.out.println("HELLO");
OperatorsCatalog catalog = new OperatorsCatalog();
}
public void calculate(String inputaddress){
//this.loadAddedClasses();
try{
logger.debug("Start to read the input file");
this.read(inputaddress);
logger.info("Input file is read");
for(int i = 0;i<expressions.size();i++){
ExpressionCalculator e = new ExpressionCalculator(expressions.get(i),OperatorsCatalog.getKnownOperators());
e.evaluate();
results.add(e.getResult());
}
logger.info("All evaluations ended");
logger.debug("Writing to file started");
this.write();
}
catch(FileNotFoundException e){
logger.warn("Can not find Input file",e);
}
catch(IOException er){
logger.warn(er.getMessage());
}
}
public void read(String inputaddress)throws FileNotFoundException,IOException{
CustomReader reader = new CustomReader();
expressions =reader.read(inputaddress);
}
public void write(){
CustomWriter writer = new CustomWriter();
writer.write(results);
}
/*public void loadAddedClasses(){
CustomClassLoader classloader = new CustomClassLoader();
classloader.loadClasses();
}*/
public static void main(String args[]) {
System.out.println("HELLO");
CustomClassLoader classloader = new CustomClassLoader();
classloader.loadClasses();
Calculator calculator = new Calculator();
calculator.calculate(args[0]);
}
}
