Encoder


1   /*
2    * Created on 2004-11-15
3    *
4    * Author Ben Yu
5    */
6   package tests.jfun.parsec.mssql;
7   
8   /**
9    * Utility class that provides some common string encoding algorithm.
10   * @author Ben Yu
11   *
12   * 2004-11-15
13   */
14  public final class Encoder {
15    /**
16     * Encode a string to a T-Sql string literal.
17     * It replaces any single quote to two single quotes.
18     * The encoded string is quoted with single quotes.
19     * @param s the string to encode.
20     * @return the encoded string.
21     */
22    public static String   encodeSqlString(final String   s){
23      final StringBuffer   buf = new StringBuffer  ();
24      buf.append('\'');
25      for(int i=0; i<s.length(); i++){
26        final char c = s.charAt(i);
27        if(c=='\'') buf.append("''");
28        else buf.append(c);
29      }
30      buf.append('\'');
31      return buf.toString();
32    }
33    /**
34     * Encode a string to a c++/java style string literal.
35     * It escapes double quote and backslash with a backslash.
36     * The encoded string is quoted with double quotes.
37     * @param s the string to encode.
38     * @return the encoded string.
39     */
40    public static String   encodeEscapedString(final String   s){
41      final StringBuffer   buf = new StringBuffer  ();
42      buf.append('"');
43      for(int i=0; i<s.length(); i++){
44        final char c = s.charAt(i);
45        if(c=='\\' || c=='"')
46          buf.append('\\');
47        buf.append(c);
48      }
49      buf.append('"');
50      return buf.toString();
51    }
52    /**
53     * To encode a character to a c++/java style character literal.
54     * It escapes single quote and backslash with a backslash.
55     * The encoded string is quoted with single quotes.
56     * @param c the character to encode.
57     * @return the encoded string.
58     */
59    public static String   encodeEscapedChar(final char c){
60      if(c=='\\' || c=='\'') return "\\"+c;
61      else return ""+c;
62    }
63  }
64
A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame
Popular Tags