private void writeCategory()

in src/main/java/org/apache/maven/plugin/doap/DoapMojo.java [983:1057]
69 lines of code
14 McCabe index (conditional complexity)

    private void writeCategory(XMLWriter writer, MavenProject project) {
        if (StringUtils.isEmpty(doapOptions.getCategory()) && (category == null || category.isEmpty())) {
            messages.addMessage(
                    new String[] {"doapOptions", "category"}, null, UserMessages.REQUIRED_BY_ASF_OR_RECOMMENDED);
            return;
        }

        // TODO: how to lookup category, map it, or just declare it.
        boolean addComment = false;
        String comment = "A category of project.";
        if (category != null && !category.isEmpty()) // backward compatible
        {
            getLog().warn("The <category/> parameter is deprecated, please use "
                    + messages.toConfiguration(new String[] {"doapOptions", "category"}, null)
                    + " parameter instead of.");

            category = category.trim();

            if (asfExtOptions.isIncluded()) {
                String asfCategory = ASFExtOptionsUtil.getCategorySupportedByASF(category);
                if (asfCategory == null) {
                    messages.getErrorMessages()
                            .add("The deprecated " + messages.toConfiguration(new String[] {"category"}, category)
                                    + " parameter is not supported by ASF. Should be one of "
                                    + Arrays.toString(ASFExtOptionsUtil.CATEGORIES));
                } else {
                    DoapUtil.writeComment(writer, comment);
                    addComment = true;
                    DoapUtil.writeRdfResourceElement(
                            writer,
                            doapOptions.getXmlnsPrefix(),
                            "category",
                            ASFExtOptionsUtil.CATEGORY_RESOURCE + asfCategory);
                }
            } else {
                DoapUtil.writeComment(writer, comment);
                addComment = true;
                DoapUtil.writeElement(writer, doapOptions.getXmlnsPrefix(), "category", category);
            }
        }

        if (StringUtils.isNotEmpty(doapOptions.getCategory())) {
            String[] categories = StringUtils.split(doapOptions.getCategory(), ",");
            for (String category : categories) {
                category = category.trim();

                if (asfExtOptions.isIncluded()) {
                    String asfCategory = ASFExtOptionsUtil.getCategorySupportedByASF(category);
                    if (asfCategory == null) {
                        messages.getErrorMessages()
                                .add("The "
                                        + messages.toConfiguration(new String[] {"doapOptions", "category"}, category)
                                        + " parameter is not supported by ASF. Should be one of "
                                        + Arrays.toString(ASFExtOptionsUtil.CATEGORIES));
                    } else {
                        if (!addComment) {
                            DoapUtil.writeComment(writer, comment);
                            addComment = true;
                        }
                        DoapUtil.writeRdfResourceElement(
                                writer,
                                doapOptions.getXmlnsPrefix(),
                                "category",
                                ASFExtOptionsUtil.CATEGORY_RESOURCE + asfCategory);
                    }
                } else {
                    if (!addComment) {
                        DoapUtil.writeComment(writer, comment);
                        addComment = true;
                    }
                    DoapUtil.writeElement(writer, doapOptions.getXmlnsPrefix(), "category", category);
                }
            }
        }
    }