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 package org.apache.bcel.util;
18
19 import java.util.Stack;
20
21 import org.apache.bcel.classfile.JavaClass;
22
23 /**
24 * Utility class implementing a (typesafe) stack of JavaClass objects.
25 *
26 * @see Stack
27 */
28 public class ClassStack {
29
30 private final Stack<JavaClass> stack = new Stack<>();
31
32 public boolean empty() {
33 return stack.empty();
34 }
35
36 public JavaClass pop() {
37 return stack.pop();
38 }
39
40 public void push(final JavaClass clazz) {
41 stack.push(clazz);
42 }
43
44 public JavaClass top() {
45 return stack.peek();
46 }
47 }