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Java > Open Source Codes > javassist > compiler > SymbolTable


1 /*
2  * Javassist, a Java-bytecode translator toolkit.
3  * Copyright (C) 1999-2005 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
16 package javassist.compiler;
17
18 import java.util.HashMap JavaDoc;
19 import javassist.compiler.ast.Declarator;
20
21 public final class SymbolTable extends HashMap JavaDoc {
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 JavaDoc 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 JavaDoc name, Declarator value) {
42         put(name, value);
43     }
44 }
45
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