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-<?php
-/**
- * Prado core interfaces and classes.
- *
- * This file contains and includes the definitions of Prado core interfaces and classes.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.pradosoft.com/
- * @copyright Copyright &copy; 2005 PradoSoft
- * @license http://www.pradosoft.com/license/
- * @version $Revision: $ $Date: $
- * @package System
- */
-
-/**
- * The framework installation path.
- */
-define('PRADO_DIR',dirname(__FILE__));
-
-/**
- * Includes TComponent definition
- */
-require_once(PRADO_DIR.'/TComponent.php');
-/**
- * Includes TApplicationComponent definition
- */
-require_once(PRADO_DIR.'/TApplicationComponent.php');
-/**
- * Includes exception definitions
- */
-require_once(PRADO_DIR.'/Exceptions/TException.php');
-/**
- * Includes TList definition
- */
-require_once(PRADO_DIR.'/Collections/TList.php');
-/**
- * Includes TMap definition
- */
-require_once(PRADO_DIR.'/Collections/TMap.php');
-/**
- * Includes TStack definition
- */
-require_once(PRADO_DIR.'/Collections/TStack.php');
-/**
- * Includes TXmlDocument, TXmlElement definition
- */
-require_once(PRADO_DIR.'/Data/TXmlDocument.php');
-/**
- * Includes THttpUtility definition
- */
-require_once(PRADO_DIR.'/Web/THttpUtility.php');
-/**
- * Includes TJavaScript definition
- */
-require_once(PRADO_DIR.'/Web/Javascripts/TJavaScript.php');
-/**
- * Includes TCache definition
- */
-require_once(PRADO_DIR.'/Data/TCache.php');
-/**
- * Includes TDataFieldAccessor definition
- */
-require_once(PRADO_DIR.'/Data/TDataFieldAccessor.php');
-/**
- * Includes TLogger definition
- */
-require_once(PRADO_DIR.'/Log/TLogger.php');
-
-/**
- * IModule interface.
- *
- * This interface must be implemented by application modules.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Revision: $ $Date: $
- * @package System
- * @since 3.0
- */
-interface IModule
-{
- /**
- * Initializes the module.
- * @param TXmlElement the configuration for the module
- */
- public function init($config);
- /**
- * @return string ID of the module
- */
- public function getID();
- /**
- * @param string ID of the module
- */
- public function setID($id);
-}
-
-/**
- * IService interface.
- *
- * This interface must be implemented by services.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Revision: $ $Date: $
- * @package System
- * @since 3.0
- */
-interface IService
-{
- /**
- * Initializes the service.
- * @param TXmlElement the configuration for the service
- */
- public function init($config);
- /**
- * @return string ID of the service
- */
- public function getID();
- /**
- * @param string ID of the service
- */
- public function setID($id);
- /**
- * Runs the service.
- */
- public function run();
-}
-
-/**
- * ITextWriter interface.
- *
- * This interface must be implemented by writers.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Revision: $ $Date: $
- * @package System
- * @since 3.0
- */
-interface ITextWriter
-{
- /**
- * Writes a string.
- * @param string string to be written
- */
- public function write($str);
- /**
- * Flushes the content that has been written.
- */
- public function flush();
-}
-
-/**
- * ITheme interface.
- *
- * This interface must be implemented by theme.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Revision: $ $Date: $
- * @package System
- * @since 3.0
- */
-interface ITheme
-{
- /**
- * Applies this theme to the specified control.
- * @param TControl the control to be applied with this theme
- */
- public function applySkin($control);
-}
-
-/**
- * ITemplate interface
- *
- * ITemplate specifies the interface for classes encapsulating
- * parsed template structures.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Revision: $ $Date: $
- * @package System
- * @since 3.0
- */
-interface ITemplate
-{
- /**
- * Instantiates the template.
- * Content in the template will be instantiated as components and text strings
- * and passed to the specified parent control.
- * @param TControl the parent control
- */
- public function instantiateIn($parent);
-}
-
-/**
- * IUser interface.
- *
- * This interface must be implemented by user objects.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Revision: $ $Date: $
- * @package System
- * @since 3.0
- */
-interface IUser
-{
- /**
- * @return string username
- */
- public function getName();
- /**
- * @param string username
- */
- public function setName($value);
- /**
- * @return boolean if the user is a guest
- */
- public function getIsGuest();
- /**
- * @param boolean if the user is a guest
- */
- public function setIsGuest($value);
- /**
- * @return array list of roles that the user is of
- */
- public function getRoles();
- /**
- * @return array|string list of roles that the user is of. If it is a string, roles are assumed by separated by comma
- */
- public function setRoles($value);
- /**
- * @param string role to be tested
- * @return boolean whether the user is of this role
- */
- public function isInRole($role);
- /**
- * @return string user data that is serialized and will be stored in session
- */
- public function saveToString();
- /**
- * @param string user data that is serialized and restored from session
- * @return IUser the user object
- */
- public function loadFromString($string);
-}
-
-/**
- * IStatePersister class.
- *
- * This interface must be implemented by all state persister classes (such as
- * {@link TPageStatePersister}, {@link TApplicationStatePersister}.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Revision: $ $Date: $
- * @package System
- * @since 3.0
- */
-interface IStatePersister
-{
- /**
- * Loads state from a persistent storage.
- * @return mixed the state
- */
- public function load();
- /**
- * Saves state into a persistent storage.
- * @param mixed the state to be saved
- */
- public function save($state);
-}
-
-/**
- * TModule class.
- *
- * TModule implements the basic methods required by IModule and may be
- * used as the basic class for application modules.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Revision: $ $Date: $
- * @package System
- * @since 3.0
- */
-abstract class TModule extends TApplicationComponent implements IModule
-{
- /**
- * @var string module id
- */
- private $_id;
-
- /**
- * Initializes the module.
- * This method is required by IModule and is invoked by application.
- * @param TXmlElement module configuration
- */
- public function init($config)
- {
- }
-
- /**
- * @return string id of this module
- */
- public function getID()
- {
- return $this->_id;
- }
-
- /**
- * @param string id of this module
- */
- public function setID($value)
- {
- $this->_id=$value;
- }
-}
-
-/**
- * TService class.
- *
- * TService implements the basic methods required by IService and may be
- * used as the basic class for application services.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Revision: $ $Date: $
- * @package System
- * @since 3.0
- */
-abstract class TService extends TApplicationComponent implements IService
-{
- /**
- * @var string service id
- */
- private $_id;
-
- /**
- * Initializes the service and attaches {@link run} to the RunService event of application.
- * This method is required by IService and is invoked by application.
- * @param TXmlElement module configuration
- */
- public function init($config)
- {
- }
-
- /**
- * @return string id of this service
- */
- public function getID()
- {
- return $this->_id;
- }
-
- /**
- * @param string id of this service
- */
- public function setID($value)
- {
- $this->_id=$value;
- }
-
- /**
- * Runs the service.
- */
- public function run()
- {
- }
-}
-
-/**
- * TVarDumper class.
- *
- * TVarDumper is intended to replace the buggy PHP function var_dump and print_r.
- * It can correctly identify the recursively referenced objects in a complex
- * object structure. It also has a recurisve depth control to avoid indefinite
- * recursive display of some peculiar variables.
- *
- * TVarDumper can be used as follows,
- * <code>
- * echo TVarDumper::dump($var);
- * </code>
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Revision: $ $Date: $
- * @package System
- * @since 3.0
- */
-class TVarDumper
-{
- private static $_objects;
- private static $_output;
- private static $_depth;
-
- /**
- * Converts a variable into a string representation.
- * This method achieves the similar functionality as var_dump and print_r
- * but is more robust when handling complex objects such as PRADO controls.
- * @param mixed variable to be dumped
- * @param integer maximum depth that the dumper should go into the variable. Defaults to 10.
- * @return string the string representation of the variable
- */
- public static function dump($var,$depth=10)
- {
- self::$_output='';
- self::$_objects=array();
- self::$_depth=$depth;
- self::dumpInternal($var,0);
- return self::$_output;
- }
-
- private static function dumpInternal($var,$level)
- {
- switch(gettype($var))
- {
- case 'boolean':
- self::$_output.=$var?'true':'false';
- break;
- case 'integer':
- self::$_output.="$var";
- break;
- case 'double':
- self::$_output.="$var";
- break;
- case 'string':
- self::$_output.="'$var'";
- break;
- case 'resource':
- self::$_output.='{resource}';
- break;
- case 'NULL':
- self::$_output.="null";
- break;
- case 'unknown type':
- self::$_output.='{unknown}';
- break;
- case 'array':
- if(self::$_depth<=$level)
- self::$_output.='array(...)';
- else if(empty($var))
- self::$_output.='array()';
- else
- {
- $keys=array_keys($var);
- $spaces=str_repeat(' ',$level*4);
- self::$_output.="array\n".$spaces.'(';
- foreach($keys as $key)
- {
- self::$_output.="\n".$spaces." [$key] => ";
- self::$_output.=self::dumpInternal($var[$key],$level+1);
- }
- self::$_output.="\n".$spaces.')';
- }
- break;
- case 'object':
- if(($id=array_search($var,self::$_objects,true))!==false)
- self::$_output.=get_class($var).'#'.($id+1).'(...)';
- else if(self::$_depth<=$level)
- self::$_output.=get_class($var).'(...)';
- else
- {
- $id=array_push(self::$_objects,$var);
- $className=get_class($var);
- $members=(array)$var;
- $keys=array_keys($members);
- $spaces=str_repeat(' ',$level*4);
- self::$_output.="$className#$id\n".$spaces.'(';
- foreach($keys as $key)
- {
- $keyDisplay=strtr(trim($key),array("\0"=>':'));
- self::$_output.="\n".$spaces." [$keyDisplay] => ";
- self::$_output.=self::dumpInternal($members[$key],$level+1);
- }
- self::$_output.="\n".$spaces.')';
- }
- break;
- }
- }
-}
-
-
-/**
- * PradoBase class.
- *
- * PradoBase implements a few fundamental static methods.
- *
- * To use the static methods, Use Prado as the class name rather than PradoBase.
- * PradoBase is meant to serve as the base class of Prado. The latter might be
- * rewritten for customization.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Revision: $ $Date: $
- * @package System
- * @since 3.0
- */
-class PradoBase
-{
- /**
- * File extension for Prado class files.
- */
- const CLASS_FILE_EXT='.php';
- /**
- * @var array list of path aliases
- */
- private static $_aliases=array('System'=>PRADO_DIR);
- /**
- * @var array list of namespaces currently in use
- */
- private static $_usings=array();
- /**
- * @var TApplication the application instance
- */
- private static $_application=null;
- /**
- * @var TLogger logger instance
- */
- private static $_logger=null;
-
- /**
- * @return string the version of Prado framework
- */
- public static function getVersion()
- {
- return '3.0RC1';
- }
-
- /**
- * Initializes error handlers.
- * This method set error and exception handlers to be functions
- * defined in this class.
- */
- public static function initErrorHandlers()
- {
- /**
- * Sets error handler to be Prado::phpErrorHandler
- */
- set_error_handler(array('PradoBase','phpErrorHandler'),error_reporting());
- /**
- * Sets exception handler to be Prado::exceptionHandler
- */
- set_exception_handler(array('PradoBase','exceptionHandler'));
- }
-
- /**
- * Class autoload loader.
- * This method is provided to be invoked within an __auload() magic method.
- * @param string class name
- */
- public static function autoload($className)
- {
- include_once($className.self::CLASS_FILE_EXT);
- if(!class_exists($className,false) && !interface_exists($className,false))
- self::fatalError("Class file for '$className' cannot be found.");
- }
-
- /**
- * @return string a string that can be displayed on your Web page showing powered-by-PRADO information
- */
- public static function poweredByPrado()
- {
- return '<a title="Powered by PRADO" href="http://www.pradosoft.com/"><img src="http://www.pradosoft.com/images/powered.gif" style="border-width:0px;" alt="Powered by PRADO" /></a>';
- }
-
- /**
- * PHP error handler.
- * This method should be registered as PHP error handler using
- * {@link set_error_handler}. The method throws an exception that
- * contains the error information.
- * @param integer the level of the error raised
- * @param string the error message
- * @param string the filename that the error was raised in
- * @param integer the line number the error was raised at
- */
- public static function phpErrorHandler($errno,$errstr,$errfile,$errline)
- {
- if(error_reporting()!=0)
- throw new TPhpErrorException($errno,$errstr,$errfile,$errline);
- }
-
- /**
- * Default exception handler.
- * This method should be registered as default exception handler using
- * {@link set_exception_handler}. The method tries to use the errorhandler
- * module of the Prado application to handle the exception.
- * If the application or the module does not exist, it simply echoes the
- * exception.
- * @param Exception exception that is not caught
- */
- public static function exceptionHandler($exception)
- {
- if(self::$_application!==null && ($errorHandler=self::$_application->getErrorHandler())!==null)
- {
- $errorHandler->handleError(null,$exception);
- }
- else
- {
- echo $exception;
- }
- exit(1);
- }
-
- /**
- * Stores the application instance in the class static member.
- * This method helps implement a singleton pattern for TApplication.
- * Repeated invocation of this method or the application constructor
- * will cause the throw of an exception.
- * This method should only be used by framework developers.
- * @param TApplication the application instance
- * @throws TInvalidOperationException if this method is invoked twice or more.
- */
- public static function setApplication($application)
- {
- if(self::$_application!==null)
- throw new TInvalidOperationException('prado_application_singleton_required');
- self::$_application=$application;
- }
-
- /**
- * @return TApplication the application singleton, null if the singleton has not be created yet.
- */
- public static function getApplication()
- {
- return self::$_application;
- }
-
- /**
- * @return string the path of the framework
- */
- public static function getFrameworkPath()
- {
- return PRADO_DIR;
- }
-
- /**
- * Serializes a data.
- * The original PHP serialize function has a bug that may not serialize
- * properly an object.
- * @param mixed data to be serialized
- * @return string the serialized data
- */
- public static function serialize($data)
- {
- $arr[0]=$data;
- return serialize($arr);
- }
-
- /**
- * Unserializes a data.
- * The original PHP unserialize function has a bug that may not unserialize
- * properly an object.
- * @param string data to be unserialized
- * @return mixed unserialized data, null if unserialize failed
- */
- public static function unserialize($str)
- {
- $arr=unserialize($str);
- return isset($arr[0])?$arr[0]:null;
- }
-
- /**
- * Creates a component with the specified type.
- * A component type can be either the component class name
- * or a namespace referring to the path of the component class file.
- * For example, 'TButton', 'System.Web.UI.WebControls.TButton' are both
- * valid component type.
- * This method can also pass parameters to component constructors.
- * All paramters passed to this method except the first one (the component type)
- * will be supplied as component constructor paramters.
- * @param string component type
- * @return TComponent component instance of the specified type
- * @throws TInvalidDataValueException if the component type is unknown
- */
- public static function createComponent($type)
- {
- self::using($type);
- if(($pos=strrpos($type,'.'))!==false)
- $type=substr($type,$pos+1);
- if(($n=func_num_args())>1)
- {
- $args=func_get_args();
- $s='$args[1]';
- for($i=2;$i<$n;++$i)
- $s.=",\$args[$i]";
- eval("\$component=new $type($s);");
- return $component;
- }
- else
- return new $type;
- }
-
- /**
- * Uses a namespace.
- * A namespace ending with an asterisk '*' refers to a directory, otherwise it represents a PHP file.
- * If the namespace corresponds to a directory, the directory will be appended
- * to the include path. If the namespace corresponds to a file, it will be included (include_once).
- * @param string namespace to be used
- * @throws TInvalidDataValueException if the namespace is invalid
- */
- public static function using($namespace)
- {
- if(isset(self::$_usings[$namespace]) || class_exists($namespace,false))
- return;
- if(($pos=strrpos($namespace,'.'))===false) // a class name
- {
- try
- {
- include_once($namespace.self::CLASS_FILE_EXT);
- }
- catch(Exception $e)
- {
- if(!class_exists($namespace,false))
- throw new TInvalidOperationException('prado_component_unknown',$namespace);
- else
- throw $e;
- }
- }
- else if(($path=self::getPathOfNamespace($namespace,self::CLASS_FILE_EXT))!==null)
- {
- $className=substr($namespace,$pos+1);
- if($className==='*') // a directory
- {
- if(is_dir($path))
- {
- self::$_usings[$namespace]=$path;
- set_include_path(get_include_path().PATH_SEPARATOR.$path);
- }
- else
- throw new TInvalidDataValueException('prado_using_invalid',$namespace);
- }
- else // a file
- {
- if(is_file($path))
- {
- self::$_usings[$namespace]=$path;
- if(!class_exists($className,false))
- {
- try
- {
- include_once($path);
- }
- catch(Exception $e)
- {
- if(!class_exists($className,false))
- throw new TInvalidOperationException('prado_component_unknown',$className);
- else
- throw $e;
- }
- }
- }
- else
- throw new TInvalidDataValueException('prado_using_invalid',$namespace);
- }
- }
- else
- throw new TInvalidDataValueException('prado_using_invalid',$namespace);
- }
-
- /**
- * Translates a namespace into a file path.
- * The first segment of the namespace is considered as a path alias
- * which is replaced with the actual path. The rest segments are
- * subdirectory names appended to the aliased path.
- * If the namespace ends with an asterisk '*', it represents a directory;
- * Otherwise it represents a file whose extension name is specified by the second parameter (defaults to empty).
- * Note, this method does not ensure the existence of the resulting file path.
- * @param string namespace
- * @param string extension to be appended if the namespace refers to a file
- * @return string file path corresponding to the namespace, null if namespace is invalid
- */
- public static function getPathOfNamespace($namespace,$ext='')
- {
- if(isset(self::$_usings[$namespace]))
- return self::$_usings[$namespace];
- else if(isset(self::$_aliases[$namespace]))
- return self::$_aliases[$namespace];
- else
- {
- $segs=explode('.',$namespace);
- $alias=array_shift($segs);
- if(($file=array_pop($segs))!==null && ($root=self::getPathOfAlias($alias))!==null)
- return rtrim($root.'/'.implode('/',$segs),'/').(($file==='*')?'':'/'.$file.$ext);
- else
- return null;
- }
- }
-
- /**
- * @param string alias to the path
- * @return string the path corresponding to the alias, null if alias not defined.
- */
- public static function getPathOfAlias($alias)
- {
- return isset(self::$_aliases[$alias])?self::$_aliases[$alias]:null;
- }
-
- /**
- * @param string alias to the path
- * @param string the path corresponding to the alias
- * @throws TInvalidOperationException if the alias is already defined
- * @throws TInvalidDataValueException if the path is not a valid file path
- */
- public static function setPathOfAlias($alias,$path)
- {
- if(isset(self::$_aliases[$alias]))
- throw new TInvalidOperationException('prado_alias_redefined',$alias);
- else if(($rp=realpath($path))!==false && is_dir($rp))
- {
- if(strpos($alias,'.')===false)
- self::$_aliases[$alias]=$rp;
- else
- throw new TInvalidDataValueException('prado_aliasname_invalid',$alias);
- }
- else
- throw new TInvalidDataValueException('prado_alias_invalid',$alias,$path);
- }
-
- /**
- * Fatal error handler.
- * This method displays an error message together with the current call stack.
- * The application will exit after calling this method.
- * @param string error message
- */
- public static function fatalError($msg)
- {
- echo '<h1>Fatal Error</h1>';
- echo '<p>'.$msg.'</p>';
- if(!function_exists('debug_backtrace'))
- return;
- echo '<h2>Debug Backtrace</h2>';
- echo '<pre>';
- $index=-1;
- foreach(debug_backtrace() as $t)
- {
- $index++;
- if($index==0) // hide the backtrace of this function
- continue;
- echo '#'.$index.' ';
- if(isset($t['file']))
- echo basename($t['file']) . ':' . $t['line'];
- else
- echo '<PHP inner-code>';
- echo ' -- ';
- if(isset($t['class']))
- echo $t['class'] . $t['type'];
- echo $t['function'];
- if(isset($t['args']) && sizeof($t['args']) > 0)
- echo '(...)';
- else
- echo '()';
- echo "\n";
- }
- echo '</pre>';
- exit(1);
- }
-
- /**
- * Returns a list of user preferred languages.
- * The languages are returned as an array. Each array element
- * represents a single language preference. The languages are ordered
- * according to user preferences. The first language is the most preferred.
- * @return array list of user preferred languages.
- */
- public static function getUserLanguages()
- {
- static $languages=null;
- if($languages===null)
- {
- if(!isset($_SERVER['HTTP_ACCEPT_LANGUAGE']))
- $languages[0]='en';
- else
- {
- $languages=array();
- foreach(explode(',',$_SERVER['HTTP_ACCEPT_LANGUAGE']) as $language)
- {
- $array=split(';q=',trim($language));
- $languages[trim($array[0])]=isset($array[1])?(float)$array[1]:1.0;
- }
- arsort($languages);
- $languages=array_keys($languages);
- if(empty($languages))
- $languages[0]='en';
- }
- }
- return $languages;
- }
-
- /**
- * Returns the most preferred language by the client user.
- * @return string the most preferred language by the client user, defaults to English.
- */
- public static function getPreferredLanguage()
- {
- static $language=null;
- if($language===null)
- {
- $langs=Prado::getUserLanguages();
- $lang=explode('-',$langs[0]);
- if(empty($lang[0]) || !ctype_alpha($lang[0]))
- $language='en';
- else
- $language=$lang[0];
- }
- return $language;
- }
-
- /**
- * Writes a log message.
- * This method wraps {@link log()} by checking the application mode.
- * When the application is in Debug mode, debug backtrace information is appended
- * to the message and the message is logged at DEBUG level.
- * When the application is in Performance mode, this method does nothing.
- * Otherwise, the message is logged at INFO level.
- * @param string message to be logged
- * @param string category of the message
- * @see log, getLogger
- */
- public static function trace($msg,$category='Uncategorized')
- {
- if(self::$_application && self::$_application->getMode()===TApplication::STATE_PERFORMANCE)
- return;
- if(!self::$_application || self::$_application->getMode()===TApplication::STATE_DEBUG)
- {
- $trace=debug_backtrace();
- if(isset($trace[0]['file']) && isset($trace[0]['line']))
- $msg.=" (line {$trace[0]['line']}, {$trace[0]['file']})";
- $level=TLogger::DEBUG;
- }
- else
- $level=TLogger::INFO;
- self::log($msg,$level,$category);
- }
-
- /**
- * Logs a message.
- * Messages logged by this method may be retrieved via {@link TLogger::getLogs}
- * and may be recorded in different media, such as file, email, database, using
- * {@link TLogRouter}.
- * @param string message to be logged
- * @param integer level of the message. Valid values include
- * TLogger::DEBUG, TLogger::INFO, TLogger::NOTICE, TLogger::WARNING,
- * TLogger::ERROR, TLogger::ALERT, TLogger::FATAL.
- * @param string category of the message
- */
- public static function log($msg,$level=TLogger::INFO,$category='Uncategorized')
- {
- if(self::$_logger===null)
- self::$_logger=new TLogger;
- self::$_logger->log($msg,$level,$category);
- }
-
- /**
- * @return TLogger message logger
- */
- public static function getLogger()
- {
- if(self::$_logger===null)
- self::$_logger=new TLogger;
- return self::$_logger;
- }
-
- /**
- * Converts a variable into a string representation.
- * This method achieves the similar functionality as var_dump and print_r
- * but is more robust when handling complex objects such as PRADO controls.
- * @param mixed variable to be dumped
- * @param integer maximum depth that the dumper should go into the variable. Defaults to 10.
- * @return string the string representation of the variable
- */
- public static function varDump($var,$depth=10)
- {
- return TVarDumper::dump($var,$depth);
- }
-}
-
-/**
- * TTextWriter class.
- *
- * TTextWriter implements a memory-based text writer.
- * Content written by TTextWriter are stored in memory
- * and can be obtained by calling {@link flush()}.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Revision: $ $Date: $
- * @package System
- * @since 3.0
- */
-class TTextWriter extends TComponent implements ITextWriter
-{
- private $_str='';
-
- /**
- * Flushes the content that has been written.
- * @return string the content being flushed
- */
- public function flush()
- {
- $str=$this->_str;
- $this->_str='';
- return $str;
- }
-
- /**
- * Writes a string.
- * @param string string to be written
- */
- public function write($str)
- {
- $this->_str.=$str;
- }
-
- /**
- * Writers a string and terminates it with a newline.
- * @param string content to be written
- * @see write
- */
- public function writeLine($str='')
- {
- $this->write($str."\n");
- }
-}
-
-if(version_compare(phpversion(),'5.1.0','>='))
-{
- /**
- * TReflectionClass class.
- * This class is written to cope with the incompatibility between different PHP versions.
- * It is equivalent to ReflectionClass if PHP version >= 5.1.0
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Revision: $ $Date: $
- * @package System
- * @since 3.0
- */
- class TReflectionClass extends ReflectionClass
- {
- }
-}
-else // PHP < 5.1.0
-{
- /**
- * TReflectionClass class.
- * This class is written to cope with the incompatibility between different PHP versions.
- * It mainly provides a way to detect if a method exists for a given class name.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Revision: $ $Date: $
- * @package System
- * @since 3.0
- */
- class TReflectionClass extends ReflectionClass
- {
- /**
- * @param string method name
- * @return boolean whether the method exists
- */
- public function hasMethod($method)
- {
- try
- {
- return $this->getMethod($method)!==null;
- }
- catch(Exception $e)
- {
- return false;
- }
- }
-
- /**
- * @param string property name
- * @return boolean whether the property exists
- */
- public function hasProperty($property)
- {
- try
- {
- return $this->getProperty($property)!==null;
- }
- catch(Exception $e)
- {
- return false;
- }
- }
- }
-
- if(!function_exists('property_exists'))
- {
- /**
- * Detects whether an object contains the specified member variable.
- * @param object
- * @param string member variable (property) name
- * @return boolean
- */
- function property_exists($object, $property)
- {
- if(is_object($object))
- return array_key_exists($property, get_object_vars($object));
- else
- return false;
- }
- }
-}
-
-?> \ No newline at end of file
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