//Mark Klara

//mak241@pitt.edu

//CS 1622 - Project 3

//SymbolTable.java

package symboltable;

import helper.*;

import java.util.Hashtable;

import java.util.Set;

import java.util.List;

public class SymbolTable implements Scope

{

private Hashtable<String, ClassSymbolTable> classes;

public SymbolTable()

{

classes = new Hashtable<String, ClassSymbolTable>();

}

public void addClass(String name)

{

addClass(name, null);

}

public void addClass(String name, String parentName)

{

classes.put(name, new ClassSymbolTable(this, name, parentName));

}

public Scope enterScope(String name)

{

return classes.get(name);

}

public Scope exitScope()

{

return null;

}

public ClassSymbolTable getClass(String name){

if(isClass(name)){

return (ClassSymbolTable)classes.get(name);

}

else{

return null;

}

}

public boolean isClass(String name){

return classes.containsKey(name);

}

public Variable lookupVariable(String name)

{

return null;

}

public boolean lookupMethod(String name, String[] paramNames, String[] paramTypes, String returnType)

{

return false;

}

public void print(int indentLevel)

{

System.out.println("~~~~~~Symbol Table~~~~~~");

List<String> keys = Helper.keysToSortedList(classes.keySet());

for(int i = 0; i < keys.size(); i++)

{

classes.get(keys.get(i)).print(indentLevel+1);

System.out.println();

}

}

public Hashtable<String, ClassSymbolTable> getClasses()

{

return classes;

}

}