public static boolean isBinary()

in apache-rat-core/src/main/java/org/apache/rat/document/impl/guesser/BinaryGuesser.java [107:138]

31 lines of code
7 McCabe index (conditional complexity)


    public static boolean isBinary(InputStream in) {
        try {
            byte[] taste = new byte[200];
            int bytesRead = in.read(taste);
            if (bytesRead > 0) {
                ByteBuffer bytes = ByteBuffer.wrap(taste, 0, bytesRead);
                CharBuffer chars = CharBuffer.allocate(2 * bytesRead);
                CharsetDecoder cd = CHARSET_FROM_FILE_ENCODING_OR_UTF8.newDecoder()
                        .onMalformedInput(CodingErrorAction.REPORT)
                        .onUnmappableCharacter(CodingErrorAction.REPORT);
                while (bytes.remaining() > 0) {
                    CoderResult res = cd.decode(bytes, chars, true);
                    if (res.isMalformed() || res.isUnmappable()) {
                        return true;
                    } else if (res.isOverflow()) {
                        chars.limit(chars.position());
                        chars.rewind();
                        int c = chars.capacity() * 2;
                        CharBuffer on = CharBuffer.allocate(c);
                        on.put(chars);
                        chars = on;
                    }
                }
                chars.limit(chars.position());
                chars.rewind();
                return isBinary(chars);
            }
        } catch (IOException e) {
            // SWALLOW 
        }
        return false;
    }