1 /*
2  * Licensed to the Apache Software Foundation (ASF) under one or more
3  * contributor license agreements.  See the NOTICE file distributed with
4  * this work for additional information regarding copyright ownership.
5  * The ASF licenses this file to You under the Apache License, Version 2.0
6  * (the "License"); you may not use this file except in compliance with
7  * the License.  You may obtain a copy of the License at
8  *
9  *      http://www.apache.org/licenses/LICENSE-2.0
10  *
11  *  Unless required by applicable law or agreed to in writing, software
12  *  distributed under the License is distributed on an "AS IS" BASIS,
13  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  *  See the License for the specific language governing permissions and
15  *  limitations under the License.
16  *
17  */
18 package org.apache.bcel.util;
19 
20 import java.util.Stack;
21 
22 import org.apache.bcel.classfile.JavaClass;
23 
24 /**
25  * Utility class implementing a (typesafe) stack of JavaClass objects.
26  *
27  * @version $Id$
28  * @see Stack
29  */
30 public class ClassStack {
31 
32     private final Stack<JavaClass> stack = new Stack<>();
33 
34 
push( final JavaClass clazz )35     public void push( final JavaClass clazz ) {
36         stack.push(clazz);
37     }
38 
39 
pop()40     public JavaClass pop() {
41         return stack.pop();
42     }
43 
44 
top()45     public JavaClass top() {
46         return stack.peek();
47     }
48 
49 
empty()50     public boolean empty() {
51         return stack.empty();
52     }
53 }
54