2 * Copyright (C) 2016 - 2018 Free Software Foundation
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 3 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 package org.mxchange.jcoreee.utils;
19 import javax.faces.context.ExternalContext;
20 import javax.faces.context.FacesContext;
23 * An utilities class for JSF
25 * @author Roland Häder<roland@mxchange.org>
27 public class FacesUtils {
30 * Generates a "base URL" for for example mail templates. For JSF
31 * pages/templates this is not needed.
35 public static String generateBaseUrl () {
36 // Get external context
37 ExternalContext context = FacesContext.getCurrentInstance().getExternalContext();
39 // Get request scheme and such ...
40 String scheme = context.getRequestScheme();
41 String serverName = context.getRequestServerName();
42 String contextPath = context.getRequestContextPath();
43 String servletPath = context.getRequestServletPath();
44 int port = context.getRequestServerPort();
49 throw new NullPointerException("context.requestScheme is null"); //NOI18N
50 } else if (null == serverName) {
51 // And throw again ...
52 throw new NullPointerException("context.requestServerName is null"); //NOI18N
55 if (null == contextPath) {
56 // Set to empty string
57 contextPath = ""; //NOI18N
60 if (null == servletPath) {
61 // Set to empty string
62 servletPath = ""; //NOI18N
68 // Unusual port found?
69 if ((port != 80) && (port != 443)) {
71 baseUrl = String.format("%s://%s:%d%s%s", scheme, serverName, port, contextPath, servletPath); //NOI18N
74 baseUrl = String.format("%s://%s%s%s", scheme, serverName, contextPath, servletPath); //NOI18N
82 * Compares both string with null-safety. This method is based on the
84 * https://codereview.stackexchange.com/questions/20191/comparing-two-strings-which-could-be-null-or-blank-in-a-comparator
86 * @param str0 First string
87 * @param str1 Second string
89 * @return Comparison value, 0 means equals, -1 means str0 smaller str2 and
90 * 2 means str0 bigger str2
92 @SuppressWarnings ("null")
93 public static int comareTo (final String str0, final String str1) {
94 // Check both strings for null and empty
95 boolean isStr0Empty = (str0 == null || str0.isEmpty());
96 boolean isStr1Empty = (str1 == null || str1.isEmpty());
99 if (isStr0Empty && isStr1Empty) {
101 } else if (isStr0Empty) {
103 } else if (isStr1Empty) {
108 return str0.compareTo(str1);
112 * Compares both string with null-safety, ignoring case-sensitivity. This
113 * method is based on the example from
114 * https://codereview.stackexchange.com/questions/20191/comparing-two-strings-which-could-be-null-or-blank-in-a-comparator
116 * @param str0 First string
117 * @param str1 Second string
119 * @return Comparison value, 0 means equals, -1 means str0 smaller str2 and
120 * 2 means str0 bigger str2
122 @SuppressWarnings ("null")
123 public static int comareToIgnoreCase (final String str0, final String str1) {
124 // Check both strings for null and empty
125 boolean isStr0Empty = (str0 == null || str0.isEmpty());
126 boolean isStr1Empty = (str1 == null || str1.isEmpty());
129 if (isStr0Empty && isStr1Empty) {
131 } else if (isStr0Empty) {
133 } else if (isStr1Empty) {
138 return str0.compareToIgnoreCase(str1);
142 * No instances from this class are required
144 private FacesUtils () {
146 if (FacesContext.getCurrentInstance() == null) {
147 // Okay, don't allow any usage
148 throw new NullPointerException("Cannot access FacesContext, maybe you have tried to use this class from an EJB?"); //NOI18N