private static boolean compareCompositeSubtypes()

in rt/frontend/jaxrs/src/main/java/org/apache/cxf/jaxrs/utils/JAXRSUtils.java [1789:1840]
46 lines of code
32 McCabe index (conditional complexity)

    private static boolean compareCompositeSubtypes(MediaType requiredType, MediaType userType,
                                            Message message) {
        boolean isCompatible = false;
        // check if we have composite subtypes
        String subType1 = requiredType.getSubtype();
        String subType2 = userType.getSubtype();

        String subTypeAfterPlus1 = splitMediaSubType(subType1, true);
        String subTypeAfterPlus2 = splitMediaSubType(subType2, true);
        if (message != null && MessageUtils.getContextualBoolean(message, PARTIAL_HIERARCHICAL_MEDIA_SUBTYPE_CHECK)) {
            if (subTypeAfterPlus1 != null || subTypeAfterPlus2 != null) {
                boolean nullPossible = subTypeAfterPlus1 == null || subTypeAfterPlus2 == null;
                isCompatible = subTypeAfterPlus1 == null && subTypeAfterPlus2.equals(subType1)
                    || subTypeAfterPlus2 == null && subTypeAfterPlus1.equals(subType2);
                if (!isCompatible && !nullPossible) {
                    isCompatible = subTypeAfterPlus1.equalsIgnoreCase(subTypeAfterPlus2)
                        && (subType1.charAt(0) == '*' || subType2.charAt(0) == '*');
                }

                if (!isCompatible) {
                    String subTypeBeforePlus1 = splitMediaSubType(subType1, false);
                    String subTypeBeforePlus2 = splitMediaSubType(subType2, false);
                    nullPossible = subTypeBeforePlus1 == null || subTypeBeforePlus2 == null;
                    isCompatible = subTypeBeforePlus1 == null && subTypeBeforePlus2 != null
                            && subTypeBeforePlus2.equals(subType1)
                            || subTypeBeforePlus2 == null && subTypeBeforePlus1 != null
                            && subTypeBeforePlus1.equals(subType2);
                    if (!isCompatible && !nullPossible) {
                        isCompatible = subTypeBeforePlus1.equalsIgnoreCase(subTypeBeforePlus2)
                            && (subType1.charAt(subType1.length() - 1) == '*'
                                || subType2.charAt(subType2.length() - 1) == '*');
                    }
                }
            }
        } else {
            if (subTypeAfterPlus1 != null && subTypeAfterPlus2 != null) {

                isCompatible = subTypeAfterPlus1.equalsIgnoreCase(subTypeAfterPlus2)
                    && (subType1.charAt(0) == '*' || subType2.charAt(0) == '*');

                if (!isCompatible) {
                    String subTypeBeforePlus1 = splitMediaSubType(subType1, false);
                    String subTypeBeforePlus2 = splitMediaSubType(subType2, false);

                    isCompatible = subTypeBeforePlus1 != null && subTypeBeforePlus1.equalsIgnoreCase(subTypeBeforePlus2)
                        && (subType1.charAt(subType1.length() - 1) == '*'
                            || subType2.charAt(subType2.length() - 1) == '*');
                }
            }
        }
        return isCompatible;
    }