package sableCCCalculator;
import java.util.HashMap;
import sableCCCalculator.types.*;

public class SymbolTable {

    public interface SymbolTableIndex {}

    public abstract class Name implements SymbolTableIndex {
        protected String name;

        String getName() {
            return this.name;
        }
    }

    public class Constant implements SymbolTableIndex {
        int index;

        public Constant(int index) {
            this.index = index;
        }
    }

    public class Variable extends Name {
        public Variable(String name) {
            this.name = name;
        }
    }

    private HashMap<SymbolTableIndex, Type> theSymbolTable = new HashMap<>();

    public SymbolTableIndex addConstant(Type item) {
        SymbolTableIndex index = new Constant(item.hashCode());
        theSymbolTable.put(index, item);
        return index;
    }

    public SymbolTableIndex addVariable(Type item, String name) {
        SymbolTableIndex index = new Variable(name);
        theSymbolTable.put(index, item);
        return index;
    }

    public Type get(SymbolTableIndex index) {
        return theSymbolTable.get(index);
    }
}