Main.java

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import syntaxtree.*;

public class Main {
    public static void main(String[] args) throws Exception {

        if(args.length < 1){
            System.err.println("Usage: java [MainClassName] [file1] [file2] ... [fileN]");
            System.exit(1);
        }

        for(String filename :args){
            FileInputStream fis = null;
            try{
                fis = new FileInputStream(filename);
                MiniJavaParser parser = new MiniJavaParser(fis);

                Goal root = parser.Goal();

                SymTableVisitor visitor1 = new SymTableVisitor();
                root.accept(visitor1, null);

                TypeCheckingVisitor visitor2 = new TypeCheckingVisitor(visitor1.symbolTable);
                root.accept(visitor2, null);

                OverridingOverloadingVisitor visitor3= new OverridingOverloadingVisitor(visitor1.symbolTable);
                root.accept(visitor3,null);

                OffsetCalculator oc = new OffsetCalculator(visitor1.symbolTable);
                oc.fieldOffsetCalculator();
                oc.methodOffsetCalculator();
                oc.printOffsets();

            }
            catch(ParseException ex){
                System.out.println(ex.getMessage());
            }
            catch(FileNotFoundException ex){
                System.err.println(ex.getMessage());
            }
            catch(RuntimeException ex){
                System.err.println(ex.getMessage());
            }
            finally{
                try{
                    if(fis != null) fis.close();
                }
                catch(IOException ex){
                    System.err.println(ex.getMessage());
                }
                
            }

        }

    }
}