protected final Event internalNext()

in johnzon-core/src/main/java/org/apache/johnzon/core/JsonStreamParserImpl.java [407:509]
70 lines of code
35 McCabe index (conditional complexity)

    protected final Event internalNext() {
        //main entry, make decision how to handle the current character in the stream

        if (!hasNext()) {
            final char c = readNextChar();
            unreadChar();
            if (c != EOF) {
                throw uexc("No available event");
            }
            throw new NoSuchElementException();
        }

        if (previousEvent > 0 && currentStructureElement == null) {
            throw uexc("Unexpected end of structure");
        }

        final char c = readNextNonWhitespaceChar(readNextChar());

        if (c == COMMA_CHAR) {
            //last event must one of the following-> " ] } LITERAL
            if (previousEvent == KEY_SEPARATOR_EVENT || previousEvent == START_ARRAY
                    || previousEvent == START_OBJECT || previousEvent == COMMA_EVENT
                    || previousEvent == KEY_NAME) {
                throw uexc("Expected \" ] } LITERAL");
            }

            previousEvent = COMMA_EVENT;
            return internalNext();

        }

        if (c == KEY_SEPARATOR) {

            if (previousEvent != KEY_NAME) {
                throw uexc("A : can only follow a key name");
            }

            previousEvent = KEY_SEPARATOR_EVENT;
            return internalNext();

        }

        if (!isCurrentNumberIntegral) {
            isCurrentNumberIntegral = true;
        }
        //        if (currentBigDecimalNumber != null) {
        //            currentBigDecimalNumber = null;
        //        }
        if (currentIntegralNumber != Integer.MIN_VALUE) {
            currentIntegralNumber = Integer.MIN_VALUE;
        }

        releasePreviousFallBackCopyBuffers();
        if (fallBackCopyBufferLength != 0) {
            fallBackCopyBufferLength = 0;
        }

        startOfValueInBuffer = endOfValueInBuffer = -1;

        switch (c) {

            case START_OBJECT_CHAR:

                return handleStartObject();

            case END_OBJECT_CHAR:

                return handleEndObject();

            case START_ARRAY_CHAR:

                return handleStartArray();

            case END_ARRAY_CHAR:

                return handleEndArray();

            case QUOTE_CHAR:

                return handleQuote();

            case '0':
            case '1':
            case '2':
            case '3':
            case '4':
            case '5':
            case '6':
            case '7':
            case '8':
            case '9':
            case MINUS:
            case FALSE_F: // false
            case TRUE_T: // true
            case NULL_N: // null

                return handleLiteral();

            default:

                return defaultHandling(c);
        }
    }