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Java > Open Source Codes > com > teamkonzept > lib > TKUrlConverter


1 /*
2  * $Header: /cvsroot/webman-cms/source/webman/com/teamkonzept/lib/TKUrlConverter.java,v 1.5.20.1 2002/05/16 09:51:29 alex Exp $
3  *
4  */
5 package com.teamkonzept.lib;
6
7 /**
8     Konvertierungsklasse fuer URL-Codierung
9 */
10 public class TKUrlConverter extends TKConverter {
11     public final static String JavaDoc CONV_ID = "URL";
12     public final static String JavaDoc CONV_NAME = "URL-ISO-8859_1";
13     
14     public String JavaDoc getName()
15     {
16         return CONV_NAME;
17     }
18     
19     public int getMaxBytesPerChar()
20     {
21         return 3;
22     }
23     
24     public int minCharSize(int byteCount)
25     {
26         return byteCount;
27     }
28     
29     public int charsToBytes(char src[], byte dst[], int srcBegin, int length, int dstBegin)
30     {
31         int lastPos = srcBegin+length;
32         int firstPos = dstBegin;
33         for( int i=srcBegin; i<lastPos; i++ ) {
34             char c = src[i];
35             if( (c >= 'A' && c <= 'Z')
36             || (c >= 'a' && c <= 'z')
37             || (c >= '0' && c <= '9')
38             || c == '@' || c == '*' || c == ':' || c == '-' || c == '_'
39             ) {
40                 dst[ dstBegin++ ] = (byte) c;
41             }
42             /*
43             else if( c == ' ' ) {
44                 dst[ dstBegin++ ] = (byte) '+';
45             } */
46             else if( c <= '\u00FF' ) {
47                 int code = (int) c;
48                 dst[ dstBegin++ ] = (byte) '%';
49                 dst[ dstBegin++ ] = (byte) Character.forDigit( ( code / 16 ), 16 );
50                 dst[ dstBegin++ ] = (byte) Character.forDigit( ( code % 16 ), 16 );
51             }
52         }
53         
54         return dstBegin - firstPos;
55     }
56     
57     final static byte PERCENT = (byte) '%';
58     final static byte PLUS = (byte) '+';
59
60     public int bytesToChars(byte src[], char dst[], int srcBegin, int length, int dstBegin)
61     {
62         int lastPos = srcBegin+length;
63         int firstPos = dstBegin;
64         for( int i=srcBegin; i<lastPos; i++ ) {
65             byte b = src[i];
66             if( b == PERCENT ) {
67                 int high = Character.digit( (char) src[++i], 16 );
68                 int code = 16*high + Character.digit( (char) src[++i], 16 );
69                 dst[dstBegin++] = (char) code;
70             }
71             else if( b == PLUS ) {
72                 dst[dstBegin++] = ' ';
73             }
74             else {
75                 dst[dstBegin++] = (char) b;
76             }
77         }
78         return dstBegin - firstPos;
79     }
80 }
81
82
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