Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
DomStack |
|
| 2.5;2.5 |
1 | /** | |
2 | * Copyright (c) 2013-2017, xembly.org | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: 1) Redistributions of source code must retain the above | |
8 | * copyright notice, this list of conditions and the following | |
9 | * disclaimer. 2) Redistributions in binary form must reproduce the above | |
10 | * copyright notice, this list of conditions and the following | |
11 | * disclaimer in the documentation and/or other materials provided | |
12 | * with the distribution. 3) Neither the name of the xembly.org nor | |
13 | * the names of its contributors may be used to endorse or promote | |
14 | * products derived from this software without specific prior written | |
15 | * permission. | |
16 | * | |
17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
18 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT | |
19 | * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
20 | * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL | |
21 | * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | |
22 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
23 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
24 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
26 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
27 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
28 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
29 | */ | |
30 | package org.xembly; | |
31 | ||
32 | import java.util.Deque; | |
33 | import java.util.LinkedList; | |
34 | import java.util.NoSuchElementException; | |
35 | import lombok.EqualsAndHashCode; | |
36 | ||
37 | /** | |
38 | * Stack of DOM cursors. | |
39 | * | |
40 | * <p>The class is mutable and thread-safe. | |
41 | * | |
42 | * @author Yegor Bugayenko (yegor256@gmail.com) | |
43 | * @version $Id: 9172a9e2905c67c9cbe1755eca99ca0188c5a7cd $ | |
44 | * @since 0.16 | |
45 | */ | |
46 | 0 | @EqualsAndHashCode(of = "cursors") |
47 | 46 | final class DomStack implements Directive.Stack { |
48 | ||
49 | /** | |
50 | * Queue of cursors. | |
51 | */ | |
52 | 46 | private final transient Deque<Directive.Cursor> cursors = |
53 | new LinkedList<Directive.Cursor>(); | |
54 | ||
55 | @Override | |
56 | public void push(final Directive.Cursor cursor) { | |
57 | 4 | synchronized (this.cursors) { |
58 | 4 | this.cursors.push(cursor); |
59 | 4 | } |
60 | 4 | } |
61 | ||
62 | @Override | |
63 | public Directive.Cursor pop() throws ImpossibleModificationException { | |
64 | try { | |
65 | 5 | synchronized (this.cursors) { |
66 | 5 | return this.cursors.pop(); |
67 | 1 | } |
68 | 1 | } catch (final NoSuchElementException ex) { |
69 | 1 | throw new ImpossibleModificationException( |
70 | "stack is empty, can't POP", ex | |
71 | ); | |
72 | } | |
73 | } | |
74 | } |