Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
SimpleStack |
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| 1.0;1 | ||||
SimpleStack$Element |
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| 1.0;1 |
1 | /* | |
2 | * Licensed to the Apache Software Foundation (ASF) under one | |
3 | * or more contributor license agreements. See the NOTICE file | |
4 | * distributed with this work for additional information | |
5 | * regarding copyright ownership. The ASF licenses this file | |
6 | * to you under the Apache License, Version 2.0 (the | |
7 | * "License"); you may not use this file except in compliance | |
8 | * with the License. You may obtain a copy of the License at | |
9 | * | |
10 | * http://www.apache.org/licenses/LICENSE-2.0 | |
11 | * | |
12 | * Unless required by applicable law or agreed to in writing, | |
13 | * software distributed under the License is distributed on an | |
14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
15 | * KIND, either express or implied. See the License for the | |
16 | * specific language governing permissions and limitations | |
17 | * under the License. | |
18 | */ | |
19 | package org.apache.johnzon.core; | |
20 | ||
21 | 2 | class SimpleStack<T> { |
22 | ||
23 | private Element<T> head; | |
24 | ||
25 | void push(final T element) { | |
26 | ||
27 | 4 | final Element<T> tmp = new Element<T>(); |
28 | 4 | tmp.payload = element; |
29 | 4 | tmp.previous = head; |
30 | 4 | head = tmp; |
31 | ||
32 | 4 | } |
33 | ||
34 | T pop() { | |
35 | ||
36 | 4 | final T tmp = head.payload; |
37 | 4 | head = head.previous; |
38 | 4 | return tmp; |
39 | ||
40 | } | |
41 | ||
42 | T peek() { | |
43 | 22 | return head.payload; |
44 | } | |
45 | ||
46 | boolean isEmpty() { | |
47 | 46 | return head == null; |
48 | } | |
49 | ||
50 | 2 | private static class Element<T> { |
51 | ||
52 | 4 | public Element() { |
53 | ||
54 | 4 | } |
55 | ||
56 | Element<T> previous; | |
57 | T payload; | |
58 | ||
59 | } | |
60 | ||
61 | } |