Re: Encode THAI Language into BASE64 Format

Question

Hi  Guru's,
        Have a requirement  to encode particular IDOC text fields which are in  THAI language to BASE64 format . We are able to encode the same for english but not able to do the same for Thai language so can any one help with the coding to create custom UDF  which can convert.
Regards
Sathish Kumar K.C

Answer 1

Hi ,
   Please find below my code...
public class Base64a {
//     Mapping table from 6-bit nibbles to Base64 characters.
private static char[]    map1 = new char[64];
     static {
        int i=0;
        for (char c='A'; c<='Z'; c+) map1[i+] = c;
        for (char c='a'; c<='z'; c+) map1[i+] = c;
        for (char c='0'; c<='9'; c+) map1[i+] = c;
        map1[i+] = ''; map1[i++] = '/'; }
//     Mapping table from Base64 characters to 6-bit nibbles.
private static byte[]    map2 = new byte[128];
     static {
        for (int i=0; i<map2.length; i++) map2<i> = -1;
        for (int i=0; i<64; i++) map2[map1<i>] = (byte)i; }
Encodes a string into Base64 format.
No blanks or line breaks are inserted.
@param s  a String to be encoded.
@return   A String with the Base64 encoded data.
public static String encode (String s) {
     return new String(encode(s.getBytes())); }
Encodes a byte array into Base64 format.
No blanks or line breaks are inserted.
@param in  an array containing the data bytes to be encoded.
@return    A character array with the Base64 encoded data.
public static char[] encode (byte[] in) {
     int iLen = in.length;
     int oDataLen = (iLen*4+2)/3;       // output length without padding
     int oLen = ((iLen+2)/3)*4;         // output length including padding
     char[] out = new char[oLen];
     int ip = 0;
     int op = 0;
     while (ip < iLen) {
        int i0 = in[ip++] & 0xff;
        int i1 = ip < iLen ? in[ip++] & 0xff : 0;
        int i2 = ip < iLen ? in[ip++] & 0xff : 0;
        int o0 = i0 >>> 2;
        int o1 = ((i0 &   3) << 4) | (i1 >>> 4);
        int o2 = ((i1 & 0xf) << 2) | (i2 >>> 6);
        int o3 = i2 & 0x3F;
        out[op++] = map1[o0];
        out[op++] = map1[o1];
        out[op] = op < oDataLen ? map1[o2] : '='; op++;
        out[op] = op < oDataLen ? map1[o3] : '='; op++; }
     return out; }
Regards
Sathish Kumar