private void writeContributor()

in src/main/java/org/apache/maven/plugin/doap/DoapMojo.java [1591:1669]
71 lines of code
23 McCabe index (conditional complexity)

    private void writeContributor(
            XMLWriter writer, Contributor developerOrContributor, String xmlsPrefix, String doapType) {
        if (developerOrContributor == null) {
            return;
        }

        if (doapType == null || doapType.isEmpty()) {
            throw new IllegalArgumentException("doapType is required.");
        }

        String name = developerOrContributor.getName();
        String email = developerOrContributor.getEmail();
        String organization = developerOrContributor.getOrganization();
        String organizationUrl = developerOrContributor.getOrganizationUrl();
        String homepage = developerOrContributor.getUrl();
        String nodeId = null;

        // Name is required to write doap
        if (name == null || name.isEmpty()) {
            messages.addMessage(
                    new String[] {"project", "developers|contributors", "developer|contributor", "name"},
                    null,
                    UserMessages.REQUIRED);
            return;
        }

        if (!(organization == null || organization.isEmpty())
                || !(organizationUrl == null || organizationUrl.isEmpty())) {
            DoapUtil.Organization doapOrganization = DoapUtil.addOrganization(organization, organizationUrl);
            nodeId = DoapUtil.getNodeId();
            doapOrganization.addMember(nodeId);
        }

        DoapUtil.writeStartElement(writer, xmlsPrefix, doapType);
        DoapUtil.writeStartElement(writer, "foaf", "Person");
        if (nodeId != null && !nodeId.isEmpty()) {
            writer.addAttribute("rdf:nodeID", nodeId);
        }
        DoapUtil.writeStartElement(writer, "foaf", "name");
        writer.writeText(name);
        writer.endElement(); // foaf:name
        if (email != null && !email.isEmpty()) {
            if (DoapUtil.isValidEmail(email)) {
                DoapUtil.writeRdfResourceElement(writer, "foaf", "mbox", "mailto:" + email);
            } else {
                messages.addMessage(
                        new String[] {"project", "developers|contributors", "developer|contributor", "email"},
                        null,
                        UserMessages.INVALID_EMAIL);
            }
        }
        if ((organization != null && !organization.isEmpty())
                && (organizationUrl != null && !organizationUrl.isEmpty())) {
            try {
                new URL(organizationUrl);

                DoapUtil.addOrganization(organization, organizationUrl);
            } catch (MalformedURLException e) {
                messages.addMessage(
                        new String[] {"project", "developers|contributors", "developer|contributor", "organizationUrl"},
                        organizationUrl,
                        UserMessages.INVALID_URL);
            }
        }
        if (homepage != null && !homepage.isEmpty()) {
            try {
                new URL(homepage);

                DoapUtil.writeRdfResourceElement(writer, "foaf", "homepage", homepage);
            } catch (MalformedURLException e) {
                messages.addMessage(
                        new String[] {"project", "developers|contributors", "developer|contributor", "homepage"},
                        homepage,
                        UserMessages.INVALID_URL);
            }
        }
        writer.endElement(); // foaf:Person
        writer.endElement(); // doapType
    }