CSVString


1   /*
2    * Jython Database Specification API 2.0
3    *
4    * $Id: CSVString.java,v 1.2 2005/02/23 04:26:19 bzimmer Exp $
5    *
6    * Copyright (c) 2001 brian zimmer <bzimmer@ziclix.com>
7    *
8    */
9   package com.ziclix.python.sql.pipe.csv;
10  
11  /**
12   * A utility class to aide in quoting CSV strings.
13   *
14   * @author brian zimmer
15   * @version $Revision: 1.2 $
16   */
17  public class CSVString {
18  
19      /**
20       * The default delimiter.
21       */
22      public static final String   DELIMITER = ",";
23  
24      private CSVString() {
25      }
26  
27      /**
28       * Escape the string as needed using the default delimiter.
29       */
30      public static String   toCSV(String   string) {
31          return toCSV(string, CSVString.DELIMITER);
32      }
33  
34      /**
35       * Escape the string as needed using the given delimiter.
36       */
37      public static String   toCSV(String   string, String   delimiter) {
38  
39          String   res = replace(string, "\"", "\"\"");
40  
41          if ((res.indexOf("\"") >= 0) || (string.indexOf(delimiter) >= 0)) {
42              res = "\"" + res + "\"";
43          }
44  
45          return res;
46      }
47  
48      /**
49       * Returns a new string resulting from replacing the first occurrence, or all occurrences,
50       * of search string in this string with replace string.
51       * If the string search does not occur in the character sequence represented by this object,
52       * then this string is returned.
53       *
54       * @param search    the old string
55       * @param replace   the new string
56       * @param all=true  all occurrences of the search string are replaced
57       * @param all=false only the first occurrence of the search string is replaced
58       * @return a string derived from this string by replacing the first occurrence,
59       *         or every occurrence of search with replace.
60       */
61      public static String   replace(String   original, String   search, String   replace, boolean all) {
62  
63          String   valReturn = new String  ("");
64          int l = original.length();
65          int lo = search.length();
66          int i = 0;
67          int j;
68  
69          while (i <= l) {
70              j = original.indexOf(search, i);
71  
72              if (j == -1) {
73                  valReturn = valReturn.concat(original.substring(i, l));
74                  i = l + 1; // Stop, no more occurrence.
75              } else {
76                  valReturn = valReturn.concat(original.substring(i, j));
77                  valReturn = valReturn.concat(replace);
78                  i = j + lo;
79  
80                  if (!all) { // Stop, replace the first occurrence only.
81                      valReturn = valReturn.concat(original.substring(i, l));
82                      i = l + 1; // Stop, replace the first occurrence only.
83                  }
84              }
85          }
86  
87          return valReturn;
88      }
89  
90      /**
91       * Returns a new string resulting from replacing all occurrences,
92       * of search string in this string with replace string.
93       * If the string search does not occur in the character sequence represented by this object,
94       * then this string is returned.
95       *
96       * @param search  the old string
97       * @param replace the new string
98       * @return a string derived from this string by replacing every occurrence of search with replace.
99       */
100     public static String   replace(String   original, String   search, String   replace) {
101         return replace(original, search, replace, true);
102     }
103 
104     /**
105      * Returns a new string resulting from replacing the end of this String
106      * from oldSuffix to newSuffix.
107      * The original string is returned if it does not end with oldSuffix.
108      *
109      * @param oldSuffix the old suffix
110      * @param newSuffix the new suffix
111      * @return a string derived from this string by replacing the end oldSuffix by newSuffix
112      */
113     public static String   replaceEndWith(String   original, String   oldSuffix, String   newSuffix) {
114 
115         if (original.endsWith(oldSuffix)) {
116             String   st = original.substring(0, original.length() - oldSuffix.length());
117 
118             return st.concat(newSuffix);
119         } else {
120             return original;
121         }
122     }
123 }
124
A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame
Popular Tags