private void processWebDotXml()

in src/main/java/org/apache/sling/maven/jspc/JspCTldLocationsCache.java [287:369]
70 lines of code
17 McCabe index (conditional complexity)

    private void processWebDotXml(ServletContext ctxt) throws Exception {

        InputStream is = null;

        try {
            // Acquire input stream to web application deployment descriptor
            String altDDName = (String)ctxt.getAttribute(
                                                    Constants.ALT_DD_ATTR);
            URL uri = null;
            if (altDDName != null) {
                try {
                    uri = new URL(FILE_PROTOCOL+altDDName.replace('\\', '/'));
                } catch (MalformedURLException e) {
                    if (log.isWarnEnabled()) {
                        log.warn(Localizer.getMessage(
                                            "jsp.error.internal.filenotfound",
                                            altDDName));
                    }
                }
            } else {
                uri = ctxt.getResource(WEB_XML);
                if (uri == null && log.isWarnEnabled()) {
                    log.warn(Localizer.getMessage(
                                            "jsp.error.internal.filenotfound",
                                            WEB_XML));
                }
            }

            if (uri == null) {
                return;
            }
            is = uri.openStream();
            InputSource ip = new InputSource(is);
            ip.setSystemId(uri.toExternalForm());

            // Parse the web application deployment descriptor
            TreeNode webtld;
            // altDDName is the absolute path of the DD
            if (altDDName != null) {
                webtld = new ParserUtils().parseXMLDocument(altDDName, ip);
            } else {
                webtld = new ParserUtils().parseXMLDocument(WEB_XML, ip);
            }

            // Allow taglib to be an element of the root or jsp-config (JSP2.0)
            TreeNode jspConfig = webtld.findChild("jsp-config");
            if (jspConfig != null) {
                webtld = jspConfig;
            }
            Iterator taglibs = webtld.findChildren("taglib");
            while (taglibs.hasNext()) {

                // Parse the next <taglib> element
                TreeNode taglib = (TreeNode) taglibs.next();
                String tagUri = null;
                String tagLoc = null;
                TreeNode child = taglib.findChild("taglib-uri");
                if (child != null)
                    tagUri = child.getBody();
                child = taglib.findChild("taglib-location");
                if (child != null)
                    tagLoc = child.getBody();

                // Save this location if appropriate
                if (tagLoc == null)
                    continue;
                if (uriType(tagLoc) == NOROOT_REL_URI)
                    tagLoc = "/WEB-INF/" + tagLoc;
                String tagLoc2 = null;
                if (tagLoc.endsWith(JAR_FILE_SUFFIX)) {
                    tagLoc = ctxt.getResource(tagLoc).toString();
                    tagLoc2 = "META-INF/taglib.tld";
                }
                mappings.put(tagUri, new String[] { tagLoc, tagLoc2 });
            }
        } finally {
            if (is != null) {
                try {
                    is.close();
                } catch (Throwable t) {}
            }
        }
    }