+
+ /**
+ * Private getter for language instance
+ *
+ * @return $langInstance An instance to the language sub-system
+ */
+ protected final function getLanguageInstance () {
+ return $this->langInstance;
+ }
+
+ /**
+ * Setter for language instance
+ *
+ * @param $langInstance An instance to the language sub-system
+ * @return void
+ * @see LanguageSystem
+ */
+ public final function setLanguageInstance (ManageableLanguage $langInstance) {
+ $this->langInstance = $langInstance;
+ }
+
+ /**
+ * Private getter for file IO instance
+ *
+ * @return $fileIOInstance An instance to the file I/O sub-system
+ */
+ protected final function getFileIOInstance () {
+ return $this->fileIOInstance;
+ }
+
+ /**
+ * Setter for file I/O instance
+ *
+ * @param $fileIOInstance An instance to the file I/O sub-system
+ * @return void
+ */
+ public final function setFileIOInstance (FileIOHandler $fileIOInstance) {
+ $this->fileIOInstance = $fileIOInstance;
+ }
+
+ /**
+ * Prepare the template engine (TemplateEngine by default) for a given
+ * application helper instance (ApplicationHelper by default).
+ *
+ * @param $appInstance An application helper instance
+ * @return $tplEngine The template engine instance
+ * @throws NullPointerException If the template engine could not
+ * be initialized
+ * @throws UnsupportedTemplateEngineException If $tplEngine is an
+ * unsupported template engine
+ * @throws MissingLanguageHandlerException If the language sub-system
+ * is not yet initialized
+ */
+ protected function prepareTemplateEngine (BaseFrameworkSystem $appInstance) {
+ // Generate FQFN for all application templates
+ $fqfn = sprintf("%s%s/%s/%s",
+ PATH,
+ $this->getConfigInstance()->readConfig("application_path"),
+ strtolower($appInstance->getAppShortName()),
+ $this->getConfigInstance()->readConfig("tpl_base_path")
+ );
+
+ // Are both instances set?
+ if ($appInstance->getLanguageInstance() === null) {
+ // Invalid language instance
+ throw new MissingLanguageHandlerException($appInstance, self::EXCEPTION_MISSING_LANGUAGE_HANDLER);
+ } elseif ($appInstance->getFileIOInstance() === null) {
+ // Invalid language instance
+ throw new MissingFileIoHandlerException($appInstance, self::EXCEPTION_MISSING_FILE_IO_HANDLER);
+ }
+
+ // Initialize the template engine
+ $tplEngine = null;
+ $eval = sprintf("\$tplEngine = %s::create%s(
+ \"%s\",
+ \$appInstance->getLanguageInstance(),
+ \$appInstance->getFileIOInstance()
+);",
+ $this->getConfigInstance()->readConfig("tpl_engine"),
+ $this->getConfigInstance()->readConfig("tpl_engine"),
+ $fqfn
+ );
+
+ // Debug message
+ if ((!is_null($this->getDebugInstance())) && (defined('DEBUG_EVAL'))) {
+ $this->getDebugInstance()->output(sprintf("[%s:] Konstruierte PHP-Anweisung: <pre><em>%s</em></pre><br />\n",
+ $this->__toString(),
+ htmlentities($eval)
+ ));
+ }
+
+ // Run the command
+ eval($eval);
+
+ // Is it a valid instance?
+ if (is_null($tplEngine)) {
+ // No class returned
+ throw new NullPointerException($this, self::EXCEPTION_IS_NULL_POINTER);
+ } elseif (!$tplEngine instanceof CompileableTemplate) {
+ // Not an object! ;-(
+ throw new UnsupportedTemplateEngineException($tplEngine, self::EXCEPTION_TEMPLATE_ENGINE_UNSUPPORTED);
+ }
+
+ // Return the prepared instance
+ return $tplEngine;
+ }