3 * A generic XML template engine class
5 * @author Roland Haeder <webmaster@ship-simu.org>
7 * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2012 Core Developer Team
8 * @license GNU GPL 3.0 or any newer version
9 * @link http://www.ship-simu.org
10 * @todo This template engine does not make use of setTemplateType()
12 * This program is free software: you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation, either version 3 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program. If not, see <http://www.gnu.org/licenses/>.
25 class BaseXmlTemplateEngine extends BaseTemplateEngine {
27 * Main nodes in the XML tree
29 protected $mainNodes = array();
32 * Sub nodes in the XML tree
34 protected $subNodes = array();
39 protected $curr = array();
44 private $xmlTemplateType = 'xml';
49 private $typePrefix = 'xml';
52 * Content from dependency
54 protected $dependencyContent = array();
57 * Protected constructor
59 * @param $className Name of the class
62 protected function __construct ($className) {
63 // Call parent constructor
64 parent::__construct($className);
68 * Does a generic initialization of the template engine
70 * @param $typePrefix Type prefix
71 * @param $xmlTemplateType Type of XML template
72 * @return $templateInstance An instance of TemplateEngine
73 * @throws BasePathIsEmptyException If the provided $templateBasePath is empty
74 * @throws InvalidBasePathStringException If $templateBasePath is no string
75 * @throws BasePathIsNoDirectoryException If $templateBasePath is no
76 * directory or not found
77 * @throws BasePathReadProtectedException If $templateBasePath is
80 protected function initXmlTemplateEngine ($typePrefix, $xmlTemplateType) {
81 // Get template instance
82 $applicationInstance = Registry::getRegistry()->getInstance('app');
84 // Determine base path
85 $templateBasePath = $this->getConfigInstance()->getConfigEntry('application_base_path') . $applicationInstance->getRequestInstance()->getRequestElement('app') . '/';
87 // Is the base path valid?
88 if (empty($templateBasePath)) {
90 throw new BasePathIsEmptyException($this, self::EXCEPTION_UNEXPECTED_EMPTY_STRING);
91 } elseif (!is_string($templateBasePath)) {
93 throw new InvalidBasePathStringException(array($this, $templateBasePath), self::EXCEPTION_INVALID_STRING);
94 } elseif (!is_dir($templateBasePath)) {
96 throw new BasePathIsNoDirectoryException(array($this, $templateBasePath), self::EXCEPTION_INVALID_PATH_NAME);
97 } elseif (!is_readable($templateBasePath)) {
99 throw new BasePathReadProtectedException(array($this, $templateBasePath), self::EXCEPTION_READ_PROTECED_PATH);
103 $this->setTemplateBasePath($templateBasePath);
105 // Set template extensions
106 $this->setRawTemplateExtension($this->getConfigInstance()->getConfigEntry('raw_template_extension'));
107 $this->setCodeTemplateExtension($this->getConfigInstance()->getConfigEntry($typePrefix . '_message_template_extension'));
109 // Absolute output path for compiled templates
110 $this->setCompileOutputPath($this->getConfigInstance()->getConfigEntry('base_path') . $this->getConfigInstance()->getConfigEntry('compile_output_path'));
112 // Init a variable stacker
113 $stackerInstance = ObjectFactory::createObjectByConfiguredName($typePrefix . '_' . $xmlTemplateType . '_stacker_class');
116 $stackerInstance->initStacker($xmlTemplateType);
119 $this->setStackerInstance($stackerInstance);
121 // Set XML template type and prefix
122 $this->xmlTemplateType = $xmlTemplateType;
123 $this->typePrefix = $typePrefix;
125 // Set it in main nodes
126 array_push($this->mainNodes, str_replace('_', '-', $xmlTemplateType));
130 * Load a specified XML template into the engine
132 * @param $template The XML template we shall load
135 public function loadXmlTemplate ($template) {
137 $this->setTemplateType($this->getConfigInstance()->getConfigEntry($this->xmlTemplateType . '_template_type'));
139 // Load the special template
140 $this->loadTemplate($template);
144 * Getter for current main node
146 * @return $currMainNode Current main node
148 public final function getCurrMainNode () {
149 return $this->curr['main_node'];
153 * Setter for current main node
155 * @param $element Element name to set as current main node
156 * @return $currMainNode Current main node
158 private final function setCurrMainNode ($element) {
159 $this->curr['main_node'] = (string) $element;
163 * Getter for main node array
165 * @return $mainNodes Array with valid main node names
167 public final function getMainNodes () {
168 return $this->mainNodes;
172 * Getter for sub node array
174 * @return $subNodes Array with valid sub node names
176 public final function getSubNodes () {
177 return $this->subNodes;
181 * Read XML variables by calling readVariable() with 'general' as
184 * @param $key Key to read from
185 * @return $value Value from variable
187 public function readXmlData ($key) {
189 $value = parent::readVariable($key, 'general');
196 * Handles the template dependency for given node
198 * @param $node The node we should load a dependency template
199 * @param $templateDependency A template to load to satisfy dependencies
202 protected function handleTemplateDependency ($node, $templateDependency) {
203 // Is the template dependency set?
204 if ((!empty($templateDependency)) && (!isset($this->dependencyContent[$node]))) {
205 // Get a temporay template instance
206 $templateInstance = XmlTemplateEngineFactory::createXmlTemplateEngineInstance($this->typePrefix . '__' . $this->xmlTemplateType . '_template_class');
208 // Create method name
209 $methodName = 'load' . $this->convertToClassName($this->xmlTemplateType) . 'Template';
212 call_user_func(array($templateInstance, $methodName), $templateDependency);
214 // Parse the XML content
215 $templateInstance->renderXmlContent();
217 // Save the parsed raw content in our dependency array
218 $this->dependencyContent[$node] = $templateInstance->getRawTemplateData();
223 * Handles the start element of an XML resource
225 * @param $resource XML parser resource (currently ignored)
226 * @param $element The element we shall handle
227 * @param $attributes All attributes
229 * @throws InvalidXmlNodeException If an unknown/invalid XML node name was found
231 public final function startElement ($resource, $element, array $attributes) {
232 // Initial method name which will never be called...
233 $methodName = 'init' . $this->convertToClassName($this->xmlTemplateType);
235 // Make the element name lower-case
236 $element = strtolower($element);
238 // Is the element a main node?
239 //* DEBUG: */ echo "START: >".$element."<<br />\n";
240 if (in_array($element, $this->getMainNodes())) {
241 // Okay, main node found!
242 $methodName = 'start' . $this->convertToClassName($element);
245 $this->setCurrMainNode($element);
246 } elseif (in_array($element, $this->getSubNodes())) {
248 $methodName = 'start' . $this->convertToClassName($element);
250 // Invalid node name found
251 throw new InvalidXmlNodeException(array($this, $element, $attributes), XmlParser::EXCEPTION_XML_NODE_UNKNOWN);
255 call_user_func_array(array($this, $methodName), $attributes);
259 * Ends the main or sub node by sending out the gathered data
261 * @param $resource An XML resource pointer (currently ignored)
262 * @param $nodeName Name of the node we want to finish
264 * @throws XmlNodeMismatchException If current main node mismatches the closing one
266 public final function endElement ($resource, $nodeName) {
267 // Make all lower-case
268 $nodeName = strtolower($nodeName);
270 // Does this match with current main node?
271 //* DEBUG: */ echo "END: >".$nodeName."<<br />\n";
272 if (($nodeName != $this->getCurrMainNode()) && (in_array($nodeName, $this->getMainNodes()))) {
274 throw new XmlNodeMismatchException (array($this, $nodeName, $this->getCurrMainNode()), XmlParser::EXCEPTION_XML_NODE_MISMATCH);
277 // Construct method name
278 $methodName = 'finish' . $this->convertToClassName($nodeName);
280 // Call the corresponding method
281 //* DEBUG: */ echo "call: ".$methodName."<br />\n";
282 call_user_func_array(array($this, $methodName), array());