public int read()

in src/main/java/org/apache/commons/io/input/UnsynchronizedBufferedInputStream.java [264:290]

20 lines of code
8 McCabe index (conditional complexity)


    public int read() throws IOException {
        // Use local refs since buf and in may be invalidated by an
        // unsynchronized close()
        byte[] localBuf = buffer;
        final InputStream localIn = inputStream;
        if (localBuf == null || localIn == null) {
            throw new IOException("Stream is closed");
        }

        /* Are there buffered bytes available? */
        if (pos >= count && fillBuffer(localIn, localBuf) == IOUtils.EOF) {
            return IOUtils.EOF; /* no, fill buffer */
        }
        // localBuf may have been invalidated by fillbuf
        if (localBuf != buffer) {
            localBuf = buffer;
            if (localBuf == null) {
                throw new IOException("Stream is closed");
            }
        }

        /* Did filling the buffer fail with -1 (EOF)? */
        if (count - pos > 0) {
            return localBuf[pos++] & 0xFF;
        }
        return IOUtils.EOF;
    }