Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
IOCase |
|
| 2.5;2.5 |
1 | /* | |
2 | * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE | |
3 | * file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file | |
4 | * to You under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the | |
5 | * License. You may obtain a copy of the License at | |
6 | * | |
7 | * http://www.apache.org/licenses/LICENSE-2.0 | |
8 | * | |
9 | * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on | |
10 | * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the | |
11 | * specific language governing permissions and limitations under the License. | |
12 | */ | |
13 | package liquibase.util.file; | |
14 | ||
15 | import java.io.Serializable; | |
16 | ||
17 | /** | |
18 | * Enumeration of IO case sensitivity. | |
19 | * <p> | |
20 | * Different filing systems have different rules for case-sensitivity. Windows is case-insensitive, Unix is | |
21 | * case-sensitive. | |
22 | * <p> | |
23 | * This class captures that difference, providing an enumeration to control how filename comparisons should be | |
24 | * performed. It also provides methods that use the enumeration to perform comparisons. | |
25 | * <p> | |
26 | * Wherever possible, you should use the <code>check</code> methods in this class to compare filenames. | |
27 | * | |
28 | * @author Stephen Colebourne | |
29 | * @version $Id: IOCase.java 606345 2007-12-21 23:43:01Z ggregory $ | |
30 | * @since Commons IO 1.3 | |
31 | */ | |
32 | final class IOCase implements Serializable { | |
33 | ||
34 | /** | |
35 | * The constant for case sensitive regardless of operating system. | |
36 | */ | |
37 | 0 | public static final IOCase SENSITIVE = new IOCase("Sensitive", true); |
38 | ||
39 | /** | |
40 | * The constant for case insensitive regardless of operating system. | |
41 | */ | |
42 | 0 | public static final IOCase INSENSITIVE = new IOCase("Insensitive", false); |
43 | ||
44 | /** | |
45 | * The constant for case sensitivity determined by the current operating system. Windows is case-insensitive when | |
46 | * comparing filenames, Unix is case-sensitive. | |
47 | * <p> | |
48 | * If you derialize this constant of Windows, and deserialize on Unix, or vice versa, then the value of the | |
49 | * case-sensitivity flag will change. | |
50 | */ | |
51 | 0 | public static final IOCase SYSTEM = new IOCase("System", !FilenameUtils.isSystemWindows()); |
52 | ||
53 | /** Serialization version. */ | |
54 | private static final long serialVersionUID = -6343169151696340687L; | |
55 | ||
56 | /** The enumeration name. */ | |
57 | private final String name; | |
58 | ||
59 | /** The sensitivity flag. */ | |
60 | private final transient boolean sensitive; | |
61 | ||
62 | // ----------------------------------------------------------------------- | |
63 | /** | |
64 | * Factory method to create an IOCase from a name. | |
65 | * | |
66 | * @param name | |
67 | * the name to find | |
68 | * @return the IOCase object | |
69 | * @throws IllegalArgumentException | |
70 | * if the name is invalid | |
71 | */ | |
72 | public static IOCase forName(String name) { | |
73 | 0 | if (IOCase.SENSITIVE.name.equals(name)) { |
74 | 0 | return IOCase.SENSITIVE; |
75 | } | |
76 | 0 | if (IOCase.INSENSITIVE.name.equals(name)) { |
77 | 0 | return IOCase.INSENSITIVE; |
78 | } | |
79 | 0 | if (IOCase.SYSTEM.name.equals(name)) { |
80 | 0 | return IOCase.SYSTEM; |
81 | } | |
82 | 0 | throw new IllegalArgumentException("Invalid IOCase name: " + name); |
83 | } | |
84 | ||
85 | // ----------------------------------------------------------------------- | |
86 | /** | |
87 | * Private constructor. | |
88 | * | |
89 | * @param name | |
90 | * the name | |
91 | * @param sensitive | |
92 | * the sensitivity | |
93 | */ | |
94 | 0 | private IOCase(String name, boolean sensitive) { |
95 | 0 | this.name = name; |
96 | 0 | this.sensitive = sensitive; |
97 | 0 | } |
98 | ||
99 | /** | |
100 | * Replaces the enumeration from the stream with a real one. This ensures that the correct flag is set for SYSTEM. | |
101 | * | |
102 | * @return the resolved object | |
103 | */ | |
104 | private Object readResolve() { | |
105 | 0 | return forName(name); |
106 | } | |
107 | ||
108 | // ----------------------------------------------------------------------- | |
109 | /** | |
110 | * Gets the name of the constant. | |
111 | * | |
112 | * @return the name of the constant | |
113 | */ | |
114 | public String getName() { | |
115 | 0 | return name; |
116 | } | |
117 | ||
118 | /** | |
119 | * Does the object represent case sensitive comparison. | |
120 | * | |
121 | * @return true if case sensitive | |
122 | */ | |
123 | public boolean isCaseSensitive() { | |
124 | 0 | return sensitive; |
125 | } | |
126 | ||
127 | // ----------------------------------------------------------------------- | |
128 | /** | |
129 | * Compares two strings using the case-sensitivity rule. | |
130 | * <p> | |
131 | * This method mimics {@link String#compareTo} but takes case-sensitivity into account. | |
132 | * | |
133 | * @param str1 | |
134 | * the first string to compare, not null | |
135 | * @param str2 | |
136 | * the second string to compare, not null | |
137 | * @return true if equal using the case rules | |
138 | * @throws NullPointerException | |
139 | * if either string is null | |
140 | */ | |
141 | public int checkCompareTo(String str1, String str2) { | |
142 | 0 | if (str1 == null || str2 == null) { |
143 | 0 | throw new NullPointerException("The strings must not be null"); |
144 | } | |
145 | 0 | return sensitive ? str1.compareTo(str2) : str1.compareToIgnoreCase(str2); |
146 | } | |
147 | ||
148 | /** | |
149 | * Compares two strings using the case-sensitivity rule. | |
150 | * <p> | |
151 | * This method mimics {@link String#equals} but takes case-sensitivity into account. | |
152 | * | |
153 | * @param str1 | |
154 | * the first string to compare, not null | |
155 | * @param str2 | |
156 | * the second string to compare, not null | |
157 | * @return true if equal using the case rules | |
158 | * @throws NullPointerException | |
159 | * if either string is null | |
160 | */ | |
161 | public boolean checkEquals(String str1, String str2) { | |
162 | 0 | if (str1 == null || str2 == null) { |
163 | 0 | throw new NullPointerException("The strings must not be null"); |
164 | } | |
165 | 0 | return sensitive ? str1.equals(str2) : str1.equalsIgnoreCase(str2); |
166 | } | |
167 | ||
168 | /** | |
169 | * Checks if one string starts with another using the case-sensitivity rule. | |
170 | * <p> | |
171 | * This method mimics {@link String#startsWith(String)} but takes case-sensitivity into account. | |
172 | * | |
173 | * @param str | |
174 | * the string to check, not null | |
175 | * @param start | |
176 | * the start to compare against, not null | |
177 | * @return true if equal using the case rules | |
178 | * @throws NullPointerException | |
179 | * if either string is null | |
180 | */ | |
181 | public boolean checkStartsWith(String str, String start) { | |
182 | 0 | return str.regionMatches(!sensitive, 0, start, 0, start.length()); |
183 | } | |
184 | ||
185 | /** | |
186 | * Checks if one string ends with another using the case-sensitivity rule. | |
187 | * <p> | |
188 | * This method mimics {@link String#endsWith} but takes case-sensitivity into account. | |
189 | * | |
190 | * @param str | |
191 | * the string to check, not null | |
192 | * @param end | |
193 | * the end to compare against, not null | |
194 | * @return true if equal using the case rules | |
195 | * @throws NullPointerException | |
196 | * if either string is null | |
197 | */ | |
198 | public boolean checkEndsWith(String str, String end) { | |
199 | 0 | int endLen = end.length(); |
200 | 0 | return str.regionMatches(!sensitive, str.length() - endLen, end, 0, endLen); |
201 | } | |
202 | ||
203 | /** | |
204 | * Checks if one string contains another at a specific index using the case-sensitivity rule. | |
205 | * <p> | |
206 | * This method mimics parts of {@link String#regionMatches(boolean, int, String, int, int)} but takes | |
207 | * case-sensitivity into account. | |
208 | * | |
209 | * @param str | |
210 | * the string to check, not null | |
211 | * @param strStartIndex | |
212 | * the index to start at in str | |
213 | * @param search | |
214 | * the start to search for, not null | |
215 | * @return true if equal using the case rules | |
216 | * @throws NullPointerException | |
217 | * if either string is null | |
218 | */ | |
219 | public boolean checkRegionMatches(String str, int strStartIndex, String search) { | |
220 | 0 | return str.regionMatches(!sensitive, strStartIndex, search, 0, search.length()); |
221 | } | |
222 | ||
223 | /** | |
224 | * Converts the case of the input String to a standard format. Subsequent operations can then use standard String | |
225 | * methods. | |
226 | * | |
227 | * @param str | |
228 | * the string to convert, null returns null | |
229 | * @return the lower-case version if case-insensitive | |
230 | */ | |
231 | String convertCase(String str) { | |
232 | 0 | if (str == null) { |
233 | 0 | return null; |
234 | } | |
235 | 0 | return sensitive ? str : str.toLowerCase(); |
236 | } | |
237 | ||
238 | // ----------------------------------------------------------------------- | |
239 | /** | |
240 | * Gets a string describing the sensitivity. | |
241 | * | |
242 | * @return a string describing the sensitivity | |
243 | */ | |
244 | public String toString() { | |
245 | 0 | return name; |
246 | } | |
247 | ||
248 | } |