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