64 lines
1.1 KiB
Java
64 lines
1.1 KiB
Java
package submit;
|
|
|
|
import java.util.ArrayList;
|
|
import java.util.HashMap;
|
|
import java.util.List;
|
|
|
|
/*
|
|
* Code formatter project
|
|
* CS 4481
|
|
*/
|
|
/**
|
|
*
|
|
*/
|
|
public class SymbolTable {
|
|
|
|
private final HashMap<String, SymbolInfo> table;
|
|
private SymbolTable parent;
|
|
private final List<SymbolTable> children;
|
|
|
|
public SymbolTable() {
|
|
table = new HashMap<>();
|
|
parent = null;
|
|
children = new ArrayList<>();
|
|
}
|
|
|
|
public void addSymbol(String id, SymbolInfo symbol) {
|
|
table.put(id, symbol);
|
|
}
|
|
|
|
/**
|
|
* Returns null if no symbol with that id is in this symbol table or an
|
|
* ancestor table.
|
|
*
|
|
* @param id
|
|
* @return
|
|
*/
|
|
public SymbolInfo find(String id) {
|
|
if (table.containsKey(id)) {
|
|
return table.get(id);
|
|
}
|
|
if (parent != null) {
|
|
return parent.find(id);
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Returns the new child.
|
|
*
|
|
* @return
|
|
*/
|
|
public SymbolTable createChild() {
|
|
SymbolTable child = new SymbolTable();
|
|
children.add(child);
|
|
child.parent = this;
|
|
return child;
|
|
}
|
|
|
|
public SymbolTable getParent() {
|
|
return parent;
|
|
}
|
|
|
|
}
|