怎么样通过Zend Framework实现Zend_View集成Smarty模板系统？

<?php
/**
 * Interface class for Zend_View compatible template engine implementations
 *
 * @category Zend
 * @package Zend_View
 * @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd  New BSD License
 */
interface Zend_View_Interface
{
 /**
  * Return the template engine object, if any
  *
  * If using a third-party template engine, such as Smarty, patTemplate,
  * phplib, etc, return the template engine object. Useful for calling
  * methods on these objects, such as for setting filters, modifiers, etc.
  *
  * @return mixed
  */
 public function getEngine();
 /**
  * Set the path to find the view script used by render()
  *
  * @param string|array The directory (-ies) to set as the path. Note that
  * the concrete view implentation may not necessarily support multiple
  * directories.
  * @return void
  */
 public function setScriptPath($path);
 /**
  * Retrieve all view script paths
  *
  * @return array
  */
 public function getScriptPaths();
 /**
  * Set a base path to all view resources
  *
  * @param string $path
  * @param string $classPrefix
  * @return void
  */
 public function setBasePath($path, $classPrefix = 'Zend_View');
 /**
  * Add an additional path to view resources
  *
  * @param string $path
  * @param string $classPrefix
  * @return void
  */
 public function addBasePath($path, $classPrefix = 'Zend_View');
 /**
  * Assign a variable to the view
  *
  * @param string $key The variable name.
  * @param mixed $val The variable value.
  * @return void
  */
 public function __set($key, $val);
 /**
  * Allows testing with empty() and isset() to work
  *
  * @param string $key
  * @return boolean
  */
 public function __isset($key);
 /**
  * Allows unset() on object properties to work
  *
  * @param string $key
  * @return void
  */
 public function __unset($key);
 /**
  * Assign variables to the view script via differing strategies.
  *
  * Suggested implementation is to allow setting a specific key to the
  * specified value, OR passing an array of key => value pairs to set en
  * masse.
  *
  * @see __set()
  * @param string|array $spec The assignment strategy to use (key or array of key
  * => value pairs)
  * @param mixed $value (Optional) If assigning a named variable, use this
  * as the value.
  * @return void
  */
 public function assign($spec, $value = null);
 /**
  * Clear all assigned variables
  *
  * Clears all variables assigned to Zend_View either via {@link assign()} or
  * property overloading ({@link __get()}/{@link __set()}).
  *
  * @return void
  */
 public function clearVars();
 /**
  * Processes a view script and returns the output.
  *
  * @param string $name The script name to process.
  * @return string The script output.
  */
 public function render($name);
}

<?php
require_once 'smartylib/Smarty.class.php';
class Lq_View_Smarty implements Zend_View_Interface {
 /**
  * Smarty object
  *
  * @var Smarty
  */
 protected $_smarty;
 /**
  * Constructor
  *
  * @param $tmplPath string
  * @param $extraParams array
  * @return void
  */
 public function __construct($tmplPath = null, $extraParams = array()) {
  $this->_smarty = new Smarty ();
  if (null !== $tmplPath) {
   $this->setScriptPath ( $tmplPath );
  }
  foreach ( $extraParams as $key => $value ) {
   $this->_smarty->$key = $value;
  }
 }
 /**
  * Return the template engine object
  *
  * @return Smarty
  */
 public function getEngine() {
  return $this->_smarty;
 }
 /**
  * Set the path to the templates
  *
  * @param $path string
  *   The directory to set as the path.
  * @return void
  */
 public function setScriptPath($path) {
  if (is_readable ( $path )) {
   $this->_smarty->template_dir = $path;
   return;
  }
  throw new Exception ( 'Invalid path provided' );
 }
 /**
  * Retrieve the current template directory
  *
  * @return string
  */
 public function getScriptPaths() {
  return array ($this->_smarty->template_dir );
 }
 /**
  * Alias for setScriptPath
  *
  * @param $path string
  * @param $prefix string
  *   Unused
  * @return void
  */
 public function setBasePath($path, $prefix = 'Zend_View') {
  return $this->setScriptPath ( $path );
 }
 /**
  * Alias for setScriptPath
  *
  * @param $path string
  * @param $prefix string
  *   Unused
  * @return void
  */
 public function addBasePath($path, $prefix = 'Zend_View') {
  return $this->setScriptPath ( $path );
 }
 /**
  * Assign a variable to the template
  *
  * @param $key string
  *   The variable name.
  * @param $val mixed
  *   The variable value.
  * @return void
  */
 public function __set($key, $val) {
  $this->_smarty->assign ( $key, $val );
 }
 /**
  * Retrieve an assigned variable
  *
  * @param $key string
  *   The variable name.
  * @return mixed The variable value.
  */
 public function __get($key) {
  return $this->_smarty->get_template_vars ( $key );
 }
 /**
  * Allows testing with empty() and isset() to work
  *
  * @param $key string
  * @return boolean
  */
 public function __isset($key) {
  return (null !== $this->_smarty->get_template_vars ( $key ));
 }
 /**
  * Allows unset() on object properties to work
  *
  * @param $key string
  * @return void
  */
 public function __unset($key) {
  $this->_smarty->clear_assign ( $key );
 }
 /**
  * Assign variables to the template
  *
  * Allows setting a specific key to the specified value, OR passing an array
  * of key => value pairs to set en masse.
  *
  * @see __set()
  * @param $spec string|array
  *   The assignment strategy to use (key or array of key
  *   => value pairs)
  * @param $value mixed
  *   (Optional) If assigning a named variable, use this
  *   as the value.
  * @return void
  */
 public function assign($spec, $value = null) {
  if (is_array ( $spec )) {
   $this->_smarty->assign ( $spec );
   return;
  }
  $this->_smarty->assign ( $spec, $value );
 }
 /**
  * Clear all assigned variables
  *
  * Clears all variables assigned to Zend_View either via {@link assign()} or
  * property overloading ({@link __get()}/{@link __set()}).
  *
  * @return void
  */
 public function clearVars() {
  $this->_smarty->clear_all_assign ();
 }
 /**
  * Processes a template and returns the output.
  *
  * @param $name string
  *   The template to process.
  * @return string The output.
  */
 public function render($name) {
  ob_start();
  echo $this->_smarty->fetch ( $name );
  unset($name);
 }
}

[production]
includePaths.library = APPLICATION_PATH "/../library"
bootstrap.path = APPLICATION_PATH "/Bootstrap.php"
bootstrap.class = "Bootstrap"
appnamespace = "Application"
autoloadernamespaces.lq = "Lq_"
pluginpaths.Lq_View_Smarty = "Lq/View/Smarty"
resources.frontController.controllerDirectory = APPLICATION_PATH "/controllers"
resources.frontController.params.displayExceptions = 1
phpSettings.display_startup_errors = 1
phpSettings.display_errors = 1

<?php
class Bootstrap extends Zend_Application_Bootstrap_Bootstrap {
 /**
  * Initialize Smarty view
  */
 protected function _initSmarty() {
  $smarty = new Lq_View_Smarty ();
  $smarty->setScriptPath('/www/zf_demo1/application/views/scripts');
  return $smarty;
 }
}

<?php
class IndexController extends Zend_Controller_Action {
 public function init() {
  /*
   * Initialize action controller here
   */
 }
 public function indexAction() {
  $this->_helper->getHelper('viewRenderer')->setNoRender();
  $this->view = $this->getInvokeArg ( 'bootstrap' )->getResource ( 'smarty' );
  $this->view->book = 'Hello World! ';
  $this->view->author = 'by smarty';
  $this->view->render('index/index.tpl');
 }
}

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
{$book}
{$author}
</body>
</html>

/**
* Initialize new Smarty object
*
*/
public function __construct()
{
  // selfpointer needed by some other class methods
  $this->smarty = $this;
  if (is_callable('mb_internal_encoding')) {
   mb_internal_encoding(Smarty::$_CHARSET);
  }
  $this->start_time = microtime(true);
  // set default dirs
  $this->setTemplateDir('/www/zf_demo1/temp/smarty' . DS . 'templates' . DS)
   ->setCompileDir('/www/zf_demo1/temp/smarty' . DS . 'templates_c' . DS)
   ->setPluginsDir(SMARTY_PLUGINS_DIR)
   ->setCacheDir('/www/zf_demo1/temp/smarty' . DS . 'cache' . DS)
   ->setConfigDir('/www/zf_demo1/temp/smarty' . DS . 'configs' . DS);
  $this->debug_tpl = 'file:' . dirname(__FILE__) . '/debug.tpl';
  if (isset($_SERVER['SCRIPT_NAME'])) {
   $this->assignGlobal('SCRIPT_NAME', $_SERVER['SCRIPT_NAME']);
  }
}