1/*
2 * Javassist, a Java-bytecode translator toolkit.
3 * Copyright (C) 1999-2007 Shigeru Chiba. All Rights Reserved.
4 *
5 * The contents of this file are subject to the Mozilla Public License Version
6 * 1.1 (the "License"); you may not use this file except in compliance with
7 * the License.  Alternatively, the contents of this file may be used under
8 * the terms of the GNU Lesser General Public License Version 2.1 or later.
9 *
10 * Software distributed under the License is distributed on an "AS IS" basis,
11 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 * for the specific language governing rights and limitations under the
13 * License.
14 */
15
16package javassist.compiler;
17
18import java.util.HashMap;
19import javassist.compiler.ast.Declarator;
20
21public final class SymbolTable extends HashMap {
22    private SymbolTable parent;
23
24    public SymbolTable() { this(null); }
25
26    public SymbolTable(SymbolTable p) {
27        super();
28        parent = p;
29    }
30
31    public SymbolTable getParent() { return parent; }
32
33    public Declarator lookup(String name) {
34        Declarator found = (Declarator)get(name);
35        if (found == null && parent != null)
36            return parent.lookup(name);
37        else
38            return found;
39    }
40
41    public void append(String name, Declarator value) {
42        put(name, value);
43    }
44}
45