/**
* @param bindex Relative index within base64 character unit; between 0 and 3 (as unit has exactly
* 4 characters)
*/
protected IllegalArgumentException reportInvalidBase64Char(
Base64Variant b64variant, int ch, int bindex, String msg) throws IllegalArgumentException {
String base;
if (ch <= INT_SPACE) {
base =
"Illegal white space character (code 0x"
+ Integer.toHexString(ch)
+ ") as character #"
+ (bindex + 1)
+ " of 4-char base64 unit: can only used between units";
} else if (b64variant.usesPaddingChar(ch)) {
base =
"Unexpected padding character ('"
+ b64variant.getPaddingChar()
+ "') as character #"
+ (bindex + 1)
+ " of 4-char base64 unit: padding only legal as 3rd or 4th character";
} else if (!Character.isDefined(ch) || Character.isISOControl(ch)) {
// Not sure if we can really get here... ? (most illegal xml chars are caught at lower level)
base = "Illegal character (code 0x" + Integer.toHexString(ch) + ") in base64 content";
} else {
base =
"Illegal character '"
+ ((char) ch)
+ "' (code 0x"
+ Integer.toHexString(ch)
+ ") in base64 content";
}
if (msg != null) {
base = base + ": " + msg;
}
return new IllegalArgumentException(base);
}
