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Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
StringUtilities.java | 11.9% | 10.8% | 18.2% | 11.9% |
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1 | /* | |
2 | * Licensed to the Apache Software Foundation (ASF) under one or more | |
3 | * contributor license agreements. See the NOTICE file distributed with | |
4 | * this work for additional information regarding copyright ownership. | |
5 | * The ASF licenses this file to You under the Apache License, Version 2.0 | |
6 | * (the "License"); you may not use this file except in compliance with | |
7 | * the License. You may obtain a copy of the License at | |
8 | * | |
9 | * http://www.apache.org/licenses/LICENSE-2.0 | |
10 | * | |
11 | * Unless required by applicable law or agreed to in writing, software | |
12 | * distributed under the License is distributed on an "AS IS" BASIS, | |
13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
14 | * See the License for the specific language governing permissions and | |
15 | * limitations under the License. | |
16 | * | |
17 | * $Id: StringUtilities.java 645305 2008-04-06 20:42:36Z natalia $ | |
18 | */ | |
19 | ||
20 | package org.apache.xindice.util; | |
21 | ||
22 | import java.util.StringTokenizer; | |
23 | import java.io.UnsupportedEncodingException; | |
24 | ||
25 | /** | |
26 | * StringUtilities provides a set of commonly used String parsing and | |
27 | * processing routines. | |
28 | * | |
29 | * @version $Revision: 645305 $, $Date: 2008-04-06 20:42:36 +0000 (Sun, 06 Apr 2008) $ | |
30 | */ | |
31 | public final class StringUtilities { | |
32 | private static final String ALLOWED_CHARS = "$-_.+!*'(),;/:@&="; | |
33 | ||
34 | 0 | private StringUtilities() { |
35 | } | |
36 | ||
37 | /** | |
38 | * stringToInt quickly converts a String value to an int, returning | |
39 | * a default value if a conversion error occurs. | |
40 | * | |
41 | * @param value The value to convert | |
42 | * @param defvalue The default value to return | |
43 | * @return The converted value | |
44 | */ | |
45 | 0 | public static int stringToInt(String value, int defvalue) { |
46 | 0 | try { |
47 | 0 | return Integer.parseInt(value); |
48 | } catch (Exception e) { | |
49 | 0 | return defvalue; |
50 | } | |
51 | } | |
52 | ||
53 | /** | |
54 | * stringToInt quickly converts a String value to an int, returning | |
55 | * 0 if a conversion error occurs. | |
56 | * | |
57 | * @param value The value to convert | |
58 | * @return The converted value | |
59 | */ | |
60 | 0 | public static int stringToInt(String value) { |
61 | 0 | return stringToInt(value, 0); |
62 | } | |
63 | ||
64 | /** | |
65 | * leftJustify left-justifies a String value, space padding to width | |
66 | * characters if the string is less than width. | |
67 | * | |
68 | * @param value The value to left-justify | |
69 | * @param width The width to left-justify to | |
70 | * @return The left-justified value | |
71 | */ | |
72 | 0 | public static String leftJustify(String value, int width) { |
73 | 0 | StringBuffer sb = new StringBuffer(width); |
74 | 0 | sb.append(value); |
75 | 0 | for (int i = sb.length(); i < width; i++) { |
76 | 0 | sb.append(' '); |
77 | } | |
78 | ||
79 | 0 | if (sb.length() > width) { |
80 | 0 | sb.setLength(width); |
81 | } | |
82 | 0 | return sb.toString(); |
83 | } | |
84 | ||
85 | /** | |
86 | * rightJustify right-justifies a String value, space padding to | |
87 | * width characters if the string is less than width. | |
88 | * | |
89 | * @param value The value to right-justify | |
90 | * @param width The width to right-justify to | |
91 | * @return The right-justified value | |
92 | */ | |
93 | 0 | public static String rightJustify(String value, int width) { |
94 | 0 | StringBuffer sb = new StringBuffer(width); |
95 | 0 | sb.append(value); |
96 | 0 | for (int i = sb.length(); i < width; i++) { |
97 | 0 | sb.insert(0, ' '); |
98 | } | |
99 | ||
100 | 0 | if (sb.length() > width) { |
101 | 0 | return sb.toString().substring(sb.length() - width); |
102 | } else { | |
103 | 0 | return sb.toString(); |
104 | } | |
105 | } | |
106 | ||
107 | /** | |
108 | * parseBuffer parses through a String buffer and produces a | |
109 | * Map table using the provided delimiters. This method can also | |
110 | * urldecode values and produce newline-delimited multi-value properties if | |
111 | * multiple values for the same key are detected in the buffer. | |
112 | * | |
113 | * @param retprops The Map to populate | |
114 | * @param inbuffer The String buffer to parse | |
115 | * @param delimiters The delimiters to use | |
116 | * @param urldecode Whether or not to URL-decode the values | |
117 | * @param multivalue Whether or not to parse multiple values | |
118 | */ | |
119 | /* | |
120 | public static void parseBuffer(Map retprops, String inbuffer, String delimiters, boolean urldecode, boolean multivalue) { | |
121 | if ( inbuffer.length() == 0 ) | |
122 | return; | |
123 | int idx = 0; | |
124 | String line; | |
125 | String key; | |
126 | String value; | |
127 | String prop; | |
128 | String temp; | |
129 | StringTokenizer st = new StringTokenizer(inbuffer, delimiters, false); | |
130 | while ( st.hasMoreTokens() ) { | |
131 | line = st.nextToken(); | |
132 | idx = line.indexOf('='); | |
133 | if ( idx != -1 ) { | |
134 | key = line.substring(0, idx).trim(); | |
135 | try { | |
136 | value = urldecode ? URLDecoder.decode(line.substring(idx+1).trim()) | |
137 | : line.substring(idx+1).trim(); | |
138 | } | |
139 | catch ( Exception e ) { | |
140 | value = line.substring(idx+1).trim(); | |
141 | } | |
142 | if ( multivalue ) { | |
143 | temp = (String)retprops.get(key); | |
144 | if ( temp != null && temp.length() > 0 ) | |
145 | value = temp + "\u0001" + value; | |
146 | retprops.put(key, value); | |
147 | } | |
148 | else | |
149 | retprops.put(key, value); | |
150 | } | |
151 | } | |
152 | } | |
153 | */ | |
154 | ||
155 | /** | |
156 | * findWhiteSpace scans a String value for whitespace characters | |
157 | * from a specified starting position and returns the location of the first | |
158 | * whitespace character found. | |
159 | * | |
160 | * @param value The value to scan | |
161 | * @param start The starting position | |
162 | * @return The first whitespace location | |
163 | */ | |
164 | 0 | public static int findWhiteSpace(String value, int start) { |
165 | 0 | char[] chars = value.toCharArray(); |
166 | 0 | for (int i = start; i < chars.length; i++) { |
167 | 0 | if (Character.isWhitespace(chars[i])) { |
168 | 0 | return i; |
169 | } | |
170 | } | |
171 | 0 | return -1; |
172 | } | |
173 | ||
174 | /** | |
175 | * findWhiteSpace scans a String value for whitespace characters | |
176 | * and returns the location of the first whitespace character found. | |
177 | * | |
178 | * @param value The value to scan | |
179 | * @return The first whitespace location | |
180 | */ | |
181 | 0 | public static int findWhiteSpace(String value) { |
182 | 0 | return findWhiteSpace(value, 0); |
183 | } | |
184 | ||
185 | /** | |
186 | * javaEncode converts a String value to a Java-printable String. | |
187 | * All non-printable characters, such as newline and backspace are converted | |
188 | * to their respective escape sequences. This method does not convert | |
189 | * UNICODE characters. | |
190 | * | |
191 | * @param value The value to convert | |
192 | * @return The converted value | |
193 | */ | |
194 | 0 | public static String javaEncode(String value) { |
195 | 0 | StringTokenizer st = new StringTokenizer(value, "\b\t\n\f\r\"\'\\", true); |
196 | 0 | StringBuffer sb = new StringBuffer(value.length()); |
197 | 0 | while (st.hasMoreTokens()) { |
198 | 0 | String token = st.nextToken(); |
199 | 0 | if (token.equals("\b")) { |
200 | 0 | sb.append("\\b"); |
201 | 0 | } else if (token.equals("\t")) { |
202 | 0 | sb.append("\\t"); |
203 | 0 | } if (token.equals("\n")) { |
204 | 0 | sb.append("\\n"); |
205 | 0 | } else if (token.equals("\f")) { |
206 | 0 | sb.append("\\f"); |
207 | 0 | } else if (token.equals("\r")) { |
208 | 0 | sb.append("\\r"); |
209 | 0 | } else if (token.equals("\"")) { |
210 | 0 | sb.append("\\\""); |
211 | 0 | } else if (token.equals("\'")) { |
212 | 0 | sb.append("\\\'"); |
213 | 0 | } else if (token.equals("\\")) { |
214 | 0 | sb.append("\\\\"); |
215 | } else { | |
216 | 0 | sb.append(token); |
217 | } | |
218 | } | |
219 | 0 | return sb.toString(); |
220 | } | |
221 | ||
222 | 62 | public static boolean equals(String s1, String s2) { |
223 | 62 | if (s1 == null || s2 == null) { |
224 | 24 | return (s1 == null && s2 == null) || "".equals(s1) || "".equals(s2); |
225 | } else { | |
226 | 38 | return s1.equals(s2); |
227 | } | |
228 | } | |
229 | ||
230 | 33 | public static boolean isBlank(String str) { |
231 | 33 | for (int i = 0; i < str.length(); i++) { |
232 | 9 | if (!Character.isWhitespace(str.charAt(i))) { |
233 | 9 | return false; |
234 | } | |
235 | } | |
236 | ||
237 | 24 | return true; |
238 | } | |
239 | ||
240 | /** | |
241 | * Escapes a path in URL by converting all unsafe characters to a sequence | |
242 | * of %xx according to RFC 1738 (Uniform Resource Locators (URL)). It is | |
243 | * similar, but not identical to URLEncoder. | |
244 | * @param path String representation of a URL path to be escaped | |
245 | * @return Escaped path | |
246 | */ | |
247 | 0 | public static String escapePath(String path) { |
248 | 0 | StringBuffer buf = new StringBuffer(); |
249 | ||
250 | 0 | for (int i = 0; i < path.length(); i++) { |
251 | 0 | char ch = path.charAt(i); |
252 | ||
253 | 0 | if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z') && (ch < '0' || ch > '9') && |
254 | ALLOWED_CHARS.indexOf(ch) < 0) { | |
255 | 0 | try { |
256 | 0 | byte[] b = Character.toString(ch).getBytes("utf-8"); |
257 | 0 | for (int j = 0; j < b.length; j++) { |
258 | 0 | char upper = Character.forDigit(((b[j] >> 4) & 0xF), 16); |
259 | 0 | char lower = Character.forDigit((b[j] & 0xF), 16); |
260 | 0 | buf.append('%').append(upper).append(lower); |
261 | } | |
262 | } catch (UnsupportedEncodingException e) { | |
263 | // won't happen | |
264 | } | |
265 | } else { | |
266 | 0 | buf.append(ch); |
267 | } | |
268 | } | |
269 | ||
270 | 0 | return buf.toString(); |
271 | } | |
272 | } |
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