private static boolean[] getCharMap() {

        boolean[] isChar = new boolean[256];
        for (int c = Byte.MIN_VALUE; c <= Byte.MAX_VALUE; c++)
            if ((c >= 0x20 && c <= 0x7E) || (c >= (byte) 0xC0 && c <= (byte) 0xFE) || c == 0x0A ||
                    c == 0x0D || c == 0x09) {
                isChar[c & 0xFF] = true;
            }
        return isChar;

    }
Populates the valid ISO-8859-1 character map.

@return the valid ISO-8859-1 character map.
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-text-module/src/main/java/org/apache/tika/parser/strings/Latin1StringsParser.java