private static InputStream substitute()

in gflog-core/src/main/java/com/epam/deltix/gflog/core/LogConfigFactory.java [234:258]

• 19 lines of code
• 5 McCabe index (conditional complexity)

    private static InputStream substitute(final InputStream stream, final Properties properties) throws Exception {
        byte[] array = new byte[Math.max(stream.available() + 1, 4096)];
        int length = 0;

        while (true) {
            final int read = stream.read(array, length, array.length - length);

            if (read < 0) {
                break;
            }

            length += read;

            if (length == array.length) {
                array = Arrays.copyOf(array, length << 1);
            }
        }

        final String original = new String(array, 0, length, StandardCharsets.UTF_8);
        final String substitution = PropertyUtil.substitute(original, properties);

        return original.equals(substitution) ?
                new ByteArrayInputStream(array, 0, length) :
                new ByteArrayInputStream(substitution.getBytes(StandardCharsets.UTF_8));
    }