public TemplateModel get()

in freemarker-javax-servlet/src/main/java/freemarker/ext/jsp/TaglibFactory.java [182:270]
81 lines of code
16 McCabe index (conditional complexity)

    public TemplateModel get(final String taglibUri) throws TemplateModelException {
        synchronized (lock) {
            {
                final Taglib taglib = (Taglib) taglibs.get(taglibUri);
                if (taglib != null) {
                    return taglib;
                }
            }

            boolean failedTldListAlreadyIncluded = false;
            final TldLocation tldLocation;
            final String normalizedTaglibUri;
            try {
                if (LOG.isDebugEnabled()) {
                    LOG.debug("Locating TLD for taglib URI " + StringUtil.jQuoteNoXSS(taglibUri) + ".");
                }
                
                TldLocation explicitlyMappedTldLocation = getExplicitlyMappedTldLocation(taglibUri);
                if (explicitlyMappedTldLocation != null) {
                    tldLocation = explicitlyMappedTldLocation;
                    normalizedTaglibUri = taglibUri;
                } else {
                    // Taglib URI must be directly the path (no mapping).
                    
                    final int urlType;
                    try {
                        urlType = getUriType(taglibUri);
                    } catch (MalformedURLException e) {
                        throw new TaglibGettingException("Malformed taglib URI: " + StringUtil.jQuote(taglibUri), e);
                    }
                    if (urlType == URL_TYPE_RELATIVE) {
                        normalizedTaglibUri = resolveRelativeUri(taglibUri);
                    } else if (urlType == URL_TYPE_ABSOLUTE) {
                        normalizedTaglibUri = taglibUri;
                    } else if (urlType == URL_TYPE_FULL) {
                        // Per spec., full URI-s can only be resolved through explicit mapping
                        String failedTLDsList = getFailedTLDsList();
                        failedTldListAlreadyIncluded = true;
                        throw new TaglibGettingException("No TLD was found for the "
                                + StringUtil.jQuoteNoXSS(taglibUri) + " JSP taglib URI. (TLD-s are searched according "
                                + "the JSP 2.2 specification. In development- and embedded-servlet-container "
                                + "setups you may also need the "
                                + "\"" + FreemarkerServlet.INIT_PARAM_META_INF_TLD_LOCATIONS + "\" and "
                                + "\"" + FreemarkerServlet.INIT_PARAM_CLASSPATH_TLDS + "\" "
                                + FreemarkerServlet.class.getName() + " init-params or the similar system "
                                + "properites."
                                + (failedTLDsList == null
                                        ? ""
                                        : " Also note these TLD-s were skipped earlier due to errors; "
                                                + "see error in the log: " + failedTLDsList
                                ) + ")");
                    } else {
                        throw new BugException();
                    }

                    if (!normalizedTaglibUri.equals(taglibUri)) {
                        final Taglib taglib = (Taglib) taglibs.get(normalizedTaglibUri);
                        if (taglib != null) {
                            return taglib;
                        }
                    }

                    tldLocation = isJarPath(normalizedTaglibUri)
                                ? new ServletContextJarEntryTldLocation(
                                        normalizedTaglibUri, DEFAULT_TLD_RESOURCE_PATH)
                                : new ServletContextTldLocation(normalizedTaglibUri);
                }
            } catch (Exception e) {
                String failedTLDsList = failedTldListAlreadyIncluded ? null : getFailedTLDsList();
                throw new TemplateModelException(
                        "Error while looking for TLD file for " + StringUtil.jQuoteNoXSS(taglibUri)
                        + "; see cause exception."
                        + (failedTLDsList == null
                                ? ""
                                : " (Note: These TLD-s were skipped earlier due to errors; "
                                + "see errors in the log: " + failedTLDsList + ")"),
                        e);
            }

            try {
                return loadTaglib(tldLocation, normalizedTaglibUri);
            } catch (Exception e) {
                throw new TemplateModelException("Error while loading tag library for URI "
                        + StringUtil.jQuoteNoXSS(normalizedTaglibUri) + " from TLD location "
                        + StringUtil.jQuoteNoXSS(tldLocation) + "; see cause exception.",
                        e);
            }
        }
    }