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1 package org.ashkelon.util;
2
6
7 import java.util.ArrayList  ;
8 import java.util.StringTokenizer ;
9
10 import org.apache.oro.text.regex.MalformedPatternException;
11 import org.apache.oro.text.regex.Perl5Compiler;
12 import org.apache.oro.text.regex.Perl5Matcher;
13 import org.apache.oro.text.regex.Perl5Substitution;
14 import org.apache.oro.text.regex.Util;
15
16
17
22 public class StringUtils
23 {
24 public static boolean isBlank(java.lang.String text)
25 {
26 return (text == null || text.trim().equals(""));
27 }
28
29 public static String avoidNull(String text)
30 {
31 return (text==null) ? "" : text;
32 }
33
34 public static String wrap(String text, String wrap)
35 {
36 return wrap + text + wrap;
37 }
38
39
42 public static String join(Object [] text, String concatenator)
43 {
44 if (text.length == 0) { return ""; }
45 String result = (text[0] == null) ? "" : (String ) text[0];
46 for (int i=1; i<text.length; i++)
47 {
48 result += concatenator + ((text[i] == null) ? "" : (String ) text[i]);
49 }
50 return result;
51 }
52
53
57 public static String join(String text, String concatenator, int numtimes)
58 {
59 if(text==null) { return ""; }
60 if(numtimes <= 0) { return ""; }
61 String result = text;
62 for (int i=1; i<numtimes; i++)
63 {
64 result += concatenator + text;
65 }
66 return result;
67 }
68
69
72 public static String [] split(String text, String delimiter)
73 {
74 ArrayList list = new ArrayList (10);
75 StringTokenizer stk = new StringTokenizer (text, delimiter);
76 while (stk.hasMoreTokens())
77 {
78 list.add(stk.nextToken().trim());
79 }
80 String [] results = new String [list.size()];
81 list.toArray(results);
82 return results;
83 }
84
85 public static void main(String args[])
86 {
87 String [] list = StringUtils.split("eitan", ",");
88 for (int i=0; i<list.length; i++)
89 {
90 Logger.getInstance().traceln(list[i]);
91 }
92 }
93
94
95 public static boolean getCommandLineOption(String option, String [][] options)
96 {
97 boolean value = false;
98 for (int i = 0; i < options.length; i++)
99 {
100 String [] opt = options[i];
101 if (opt[0].equals(option))
102 {
103 value = true;
104 }
105 }
106 return value;
107 }
108
109 public static int getCommandLineOption(String option, String [][] options, int defaultValue)
110 {
111 int value = defaultValue;
112 for (int i = 0; i < options.length; i++)
113 {
114 String [] opt = options[i];
115 if (opt[0].equals(option))
116 {
117 try
118 {
119 value = Integer.parseInt(opt[1]);
120 } catch (NumberFormatException ex)
121 {
122 value = defaultValue;
123 }
124 }
125 }
126 return value;
127 }
128
129 public static String getStringCommandLineOption(String option, String [][] options)
130 {
131 for (int i = 0; i < options.length; i++)
132 {
133 String [] opt = options[i];
134 if (opt[0].equals(option))
135 {
136 return opt[1];
137 }
138 }
139 return "";
140 }
141
142
143 public static String truncate(String text, int length)
144 {
145 if (text.length() > length)
146 {
147 StringBuffer buff = new StringBuffer (text);
148 buff.setLength(length);
149 return buff.toString();
150 } return text;
152 }
153
154 public static String substitute(String input, String pattern, String replacement)
155 {
156 try
157 {
158 return Util.substitute(new Perl5Matcher(),
159 new Perl5Compiler().compile(pattern),
160 new Perl5Substitution(replacement),
161 input, Util.SUBSTITUTE_ALL);
162 }
163 catch (MalformedPatternException ex)
164 {
165 return input;
166 }
167 }
168
169
170
174 public static String stripNull(String input)
175 {
176 StringBuffer result = new StringBuffer ();
177 char c;
178 for (int i=0; i<input.length(); i++)
179 {
180 c = input.charAt(i);
181 if (c != 0)
182 {
183 result.append(c);
184 }
185 }
186 return result.toString();
187 }
188
189 }
190 |
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