st/SymbolTable.java


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package st;

import java.util.*;

public class SymbolTable {

    private HashMap<String,AbstractInstance> symt;

    public SymbolTable() {
        this.symt = new HashMap<>();
    }

    public String toString() {
        StringBuilder mapAsString = new StringBuilder("{");
        for (String key : this.symt.keySet()) {
            mapAsString.append(key + ":" + this.symt.get(key) + ", ");
        }
        mapAsString.delete(mapAsString.length()-2, mapAsString.length()).append("}");
        return mapAsString.toString();
    }

    public void addMethod() {
        this.
	    }

    public void put(String id, AbstractInstance symbol) {
        this.symt.put(id, symbol);
    }

    public TypeInstance getType(String index) {
        AbstractInstance symbol;
        return ((symbol = this.symt.get(index)) !=
                null && symbol.getType() != TypeEnum.classname &&
                symbol.getType() != TypeEnum.method) ?
            (TypeInstance) symbol : null;
    }

    public MethodInstance getMethod(String index) {
        AbstractInstance symbol;
        return ((symbol = this.symt.get(index)) !=
                null && symbol.getType() == TypeEnum.method) ?
            (MethodInstance) symbol : null;
    }

    public ClassInstance getClass(String index) {
        AbstractInstance symbol;
        return ((symbol = this.symt.get(index)) !=
                null && symbol.getType() == TypeEnum.classname) ?
            (ClassInstance) symbol : null;
    }

}