src/main/java/de/uapcore/lightpit/Functions.java

changeset 158
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parent 157
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child 159
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equal deleted inserted replaced
157:1e6f16fad3a5 158:4f912cd42876
1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 *
4 * Copyright 2018 Mike Becker. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 *
28 */
29 package de.uapcore.lightpit;
30
31 import org.slf4j.Logger;
32 import org.slf4j.LoggerFactory;
33
34 import javax.servlet.ServletContext;
35 import javax.servlet.http.HttpServletRequest;
36 import java.util.Optional;
37
38 /**
39 * Contains common static functions.
40 */
41 public final class Functions {
42
43 private static final Logger LOG = LoggerFactory.getLogger(Functions.class);
44
45 public static Optional<String[]> availableLanguages(ServletContext ctx) {
46 return Optional.ofNullable(ctx.getInitParameter(Constants.CTX_ATTR_LANGUAGES)).map((x) -> x.split("\\s*,\\s*"));
47 }
48
49 public static String enforceExt(String filename, String ext) {
50 return filename.endsWith(ext) ? filename : filename + ext;
51 }
52
53 public static String jspPath(String filename) {
54 return enforceExt(Constants.JSP_PATH_PREFIX + filename, ".jsp");
55 }
56
57 public static String fqn(String base, String name) {
58 return base + "." + name;
59 }
60
61 public static String fqn(Class<?> clazz, String name) {
62 return fqn(clazz.getName(), name);
63 }
64
65 public static String baseHref(HttpServletRequest req) {
66 return String.format("%s://%s:%d%s/",
67 req.getScheme(),
68 req.getServerName(),
69 req.getServerPort(),
70 req.getContextPath());
71 }
72
73 public static String fullPath(HttpServletRequest req) {
74 return req.getServletPath() + Optional.ofNullable(req.getPathInfo()).orElse("");
75 }
76
77 public static int parseIntOrZero(String str) {
78 try {
79 return Integer.parseInt(str);
80 } catch (NumberFormatException ex) {
81 return 0;
82 }
83 }
84
85 /**
86 * This class is not instantiatable.
87 */
88 private Functions() {
89 }
90 }

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