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yii2
Commit 7dc893d7 by Qiang Xue
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w

parent 28af2924
Showing with 141 additions and 176 deletions
framework/YiiBase.php
......@@ -62,14 +62,15 @@ class YiiBase
* @var yii\base\Application the application instance
*/
public static $app;
private static $_aliases = array(
/**
* @var array registered path aliases
*/
public static $aliases = array(
'@yii' => YII_PATH,
);
private static $_imports = array(); // alias => class name or directory
private static $_app;
private static $_logger;
private static $_imported = array(); // alias => class name or directory
private static $_logger;
/**
......@@ -114,187 +115,76 @@ class YiiBase
}
/**
* Creates an object and initializes it based on the given configuration.
*
* The specified configuration can be either a string or an array.
* If the former, the string is treated as the object type which can
* be either the class name or {@link YiiBase::getPathOfAlias class path alias}.
* If the latter, the 'class' element is treated as the object type,
* and the rest name-value pairs in the array are used to initialize
* the corresponding object properties.
*
* Any additional parameters passed to this method will be
* passed to the constructor of the object being created.
*
* NOTE: the array-typed configuration has been supported since version 1.0.1.
*
* @param mixed $config the configuration. It can be either a string or an array.
* @return mixed the created object
* @throws CException if the configuration does not have a 'class' element.
*/
public static function createComponent($config)
{
if (is_string($config))
{
$type = $config;
$config = array();
}
elseif (isset($config['class']))
{
$type = $config['class'];
unset($config['class']);
}
else
throw new CException(Yii::t('yii', 'Object configuration must be an array containing a "class" element.'));
if (!class_exists($type, false))
$type = Yii::import($type, true);
if (($n = func_num_args()) > 1)
{
$args = func_get_args();
if ($n === 2)
$object = new $type($args[1]);
elseif ($n === 3)
$object = new $type($args[1], $args[2]);
elseif ($n === 4)
$object = new $type($args[1], $args[2], $args[3]);
else
{
unset($args[0]);
$class = new ReflectionClass($type);
// Note: ReflectionClass::newInstanceArgs() is available for PHP 5.1.3+
// $object=$class->newInstanceArgs($args);
$object = call_user_func_array(array($class, 'newInstance'), $args);
}
}
else
$object = new $type;
foreach ($config as $key => $value)
$object->$key = $value;
return $object;
}
/**
* Imports a class or a directory.
*
* Importing a class is like including the corresponding class file.
* The main difference is that importing a class is much lighter because it only
* includes the class file when the class is referenced the first time.
* includes the class file when the class is referenced in the code the first time.
*
* Importing a directory is equivalent to adding a directory into the PHP include path.
* If multiple directories are imported, the directories imported later will take
* precedence in class file searching (i.e., they are added to the front of the PHP include path).
* Importing a directory will add the directory to the front of the [[classPath]] array.
* When [[autoload]] is loading an unknown class, it will search in the directories
* specified in [[classPath]] to find the corresponding class file to include.
* For this reason, if multiple directories are imported, the directories imported later
* will take precedence in class file searching.
*
* Path aliases are used to import a class or directory. For example,
* <ul>
* <li><code>application.components.GoogleMap</code>: import the <code>GoogleMap</code> class.</li>
* <li><code>application.components.*</code>: import the <code>components</code> directory.</li>
* </ul>
* The same class or directory can be imported multiple times. Only the first importing
* will count. Importing a directory does not import any of its subdirectories.
*
* The same path alias can be imported multiple times, but only the first time is effective.
* Importing a directory does not import any of its subdirectories.
* To import a class or a directory, one can use either path alias or class name (can be namespaced):
*
* Starting from version 1.1.5, this method can also be used to import a class in namespace format
* (available for PHP 5.3 or above only). It is similar to importing a class in path alias format,
* except that the dot separator is replaced by the backslash separator. For example, importing
* <code>application\components\GoogleMap</code> is similar to importing <code>application.components.GoogleMap</code>.
* The difference is that the former class is using qualified name, while the latter unqualified.
* - `@app/components/GoogleMap`: importing the `GoogleMap` class with a path alias;
* - `GoogleMap`: importing the `GoogleMap` class with a class name;
* - `@app/components/*`: importing the whole `components` directory with a path alias.
*
* Note, importing a class in namespace format requires that the namespace is corresponding to
* a valid path alias if we replace the backslash characters with dot characters.
* For example, the namespace <code>application\components</code> must correspond to a valid
* path alias <code>application.components</code>.
*
* @param string $alias path alias to be imported
* @param string $alias path alias or a simple class name to be imported
* @param boolean $forceInclude whether to include the class file immediately. If false, the class file
* will be included only when the class is being used. This parameter is used only when
* the path alias refers to a class.
* @return string the class name or the directory that this alias refers to
* @throws CException if the alias is invalid
* @throws Exception if the path alias is invalid
*/
public static function import($alias, $forceInclude = false)
{
if (isset(self::$_imports[$alias])) // previously imported
return self::$_imports[$alias];
if (class_exists($alias, false) || interface_exists($alias, false))
return self::$_imports[$alias] = $alias;
if (($pos = strrpos($alias, '\\')) !== false) // a class name in PHP 5.3 namespace format
{
$namespace = str_replace('\\', '.', ltrim(substr($alias, 0, $pos), '\\'));
if (($path = self::getPathOfAlias($namespace)) !== false)
{
$classFile = $path . DIRECTORY_SEPARATOR . substr($alias, $pos + 1) . '.php';
if ($forceInclude)
{
if (is_file($classFile))
require($classFile);
else
throw new CException(Yii::t('yii', 'Alias "{alias}" is invalid. Make sure it points to an existing PHP file.', array('{alias}' => $alias)));
self::$_imports[$alias] = $alias;
}
else
self::$classMap[$alias] = $classFile;
return $alias;
if (isset(self::$_imported[$alias])) {
return self::$_imported[$alias];
}
else
throw new CException(Yii::t('yii', 'Alias "{alias}" is invalid. Make sure it points to an existing directory.',
array('{alias}' => $namespace)));
if (class_exists($alias, false) || interface_exists($alias, false)) {
return self::$_imported[$alias] = $alias;
}
if (($pos = strrpos($alias, '.')) === false) // a simple class name
{
if ($forceInclude && self::autoload($alias))
self::$_imports[$alias] = $alias;
if ($alias[0] !== '@') { // a simple class name
if ($forceInclude && self::autoload($alias)) {
self::$_imported[$alias] = $alias;
}
return $alias;
}
$className = (string)substr($alias, $pos + 1);
$className = basename($alias);
$isClass = $className !== '*';
if ($isClass && (class_exists($className, false) || interface_exists($className, false)))
return self::$_imports[$alias] = $className;
if (($path = self::getPathOfAlias($alias)) !== false)
{
if ($isClass)
{
if ($forceInclude)
{
if (is_file($path . '.php'))
require($path . '.php');
else
throw new CException(Yii::t('yii', 'Alias "{alias}" is invalid. Make sure it points to an existing PHP file.', array('{alias}' => $alias)));
self::$_imports[$alias] = $className;
}
else
self::$classMap[$className] = $path . '.php';
return $className;
if ($isClass && (class_exists($className, false) || interface_exists($className, false))) {
return self::$_imported[$alias] = $className;
}
else // a directory
{
if (self::$classPath === null)
{
self::$classPath = array_unique(explode(PATH_SEPARATOR, get_include_path()));
if (($pos = array_search('.', self::$classPath, true)) !== false)
unset(self::$classPath[$pos]);
}
array_unshift(self::$classPath, $path);
if (self::$useIncludePath && set_include_path('.' . PATH_SEPARATOR . implode(PATH_SEPARATOR, self::$classPath)) === false)
self::$useIncludePath = false;
if (($path = self::getPathOfAlias(dirname($alias))) === false) {
throw new \yii\base\Exception('Invalid path alias: ' . $alias);
}
return self::$_imports[$alias] = $path;
if ($isClass) {
if ($forceInclude) {
require($path . "/$className.php");
self::$_imported[$alias] = $className;
}
else {
self::$classMap[$className] = $path . "/$className.php";
}
return $className;
}
else { // a directory
array_unshift(self::$classPath, $path);
return self::$_imported[$alias] = $path;
}
else
throw new CException(Yii::t('yii', 'Alias "{alias}" is invalid. Make sure it points to an existing directory or file.',
array('{alias}' => $alias)));
}
/**
......@@ -310,13 +200,13 @@ class YiiBase
*/
public static function getPathOfAlias($alias)
{
if (isset(self::$_aliases[$alias])) {
return self::$_aliases[$alias];
if (isset(self::$aliases[$alias])) {
return self::$aliases[$alias];
}
elseif (($pos = strpos($alias, '/')) !== false) {
$rootAlias = substr($alias, 0, $pos);
if (isset(self::$_aliases[$rootAlias])) {
return self::$_aliases[$alias] = self::$_aliases[$rootAlias] . substr($alias, $pos);
if (isset(self::$aliases[$rootAlias])) {
return self::$aliases[$alias] = self::$aliases[$rootAlias] . substr($alias, $pos);
}
}
return false;
......@@ -335,10 +225,10 @@ class YiiBase
public static function setPathOfAlias($alias, $path)
{
if ($path === null) {
unset(self::$_aliases[$alias]);
unset(self::$aliases[$alias]);
}
else {
self::$_aliases[$alias] = rtrim($path, '\\/');
self::$aliases[$alias] = rtrim($path, '\\/');
}
}
......@@ -370,7 +260,7 @@ class YiiBase
// namespaced class, e.g. yii\base\Component
if (strpos($className, '\\') !== false) {
// convert namespace to path alias, e.g. yii\base\Component to @yii/base/Component
$alias = '@' . str_replace('\\', '/', $className);
$alias = '@' . str_replace('\\', '/', ltrim($className, '\\'));
if (($path = self::getPathOfAlias($alias)) !== false) {
include($path . '.php');
return true;
......@@ -401,6 +291,79 @@ class YiiBase
}
/**
* Creates an object and initializes its properties based on the given configuration.
*
* The specified configuration can be either a string or an array.
* If the former, the string is treated as the object type which can
* be either a class name or [[getPathOfAlias|path alias]].
* If the latter, the array must contain a `class` element which refers
* to a class name or [[getPathOfAlias|path alias]]. The rest of the name-value
* pairs in the array will be used to initialize the corresponding object properties.
* For example,
*
* Any additional parameters passed to this method will be
* passed to the constructor of the object being created.
*
* ~~~php
* $component = Yii::createComponent('@app/components/GoogleMap');
* $component = Yii::createComponent('\application\components\GoogleMap');
* $component = Yii::createComponent(array(
* 'class' => '@app/components/GoogleMap',
* 'apiKey' => 'xyz',
* ));
* ~~~
*
* @param mixed $config the configuration. It can be either a string or an array.
* @return mixed the created object
* @throws Exception if the configuration does not have a 'class' element.
*/
public static function createComponent($config)
{
if (is_string($config)) {
$type = $config;
$config = array();
}
elseif (isset($config['class'])) {
$type = $config['class'];
unset($config['class']);
}
else {
throw new \yii\base\Exception('Object configuration must be an array containing a "class" element.');
}
if (!class_exists($type, false)) {
$type = Yii::import($type, true);
}
if (($n = func_num_args()) > 1) {
$args = func_get_args();
if ($n === 2) {
$object = new $type($args[1]);
}
elseif ($n === 3) {
$object = new $type($args[1], $args[2]);
}
elseif ($n === 4) {
$object = new $type($args[1], $args[2], $args[3]);
}
else {
unset($args[0]);
$class = new ReflectionClass($type);
$object = $class->newInstanceArgs($args);
}
}
else {
$object = new $type;
}
foreach ($config as $key => $value) {
$object->$key = $value;
}
return $object;
}
/**
* Writes a trace message.
* This method will only log a message when the application is in debug mode.
* @param string $msg message to be logged
......@@ -484,20 +447,22 @@ class YiiBase
}
/**
* @return CLogger message logger
* Returns the message logger object.
* @return \yii\logging\Logger message logger
*/
public static function getLogger()
{
if (self::$_logger !== null)
if (self::$_logger !== null) {
return self::$_logger;
else
return self::$_logger = new CLogger;
}
else {
return self::$_logger = new \yii\logging\Logger;
}
}
/**
* Sets the logger object.
* @param CLogger $logger the logger object.
* @since 1.1.8
* @param \yii\logging\Logger $logger the logger object.
*/
public static function setLogger($logger)
{
......@@ -505,8 +470,8 @@ class YiiBase
}
/**
* Returns a string that can be displayed on your Web page showing Powered-by-Yii information
* @return string a string that can be displayed on your Web page showing Powered-by-Yii information
* Returns an HTML hyperlink that can be displayed on your Web page showing Powered by Yii" information.
* @return string an HTML hyperlink that can be displayed on your Web page showing Powered by Yii" information
*/
public static function powered()
{
......@@ -539,11 +504,11 @@ class YiiBase
*/
public static function t($category, $message, $params = array(), $source = null, $language = null)
{
if (self::$_app !== null)
if (self::$app !== null)
{
if ($source === null)
$source = ($category === 'yii' || $category === 'zii') ? 'coreMessages' : 'messages';
if (($source = self::$_app->getComponent($source)) !== null)
$source = $category === 'yii' ? 'coreMessages' : 'messages';
if (($source = self::$app->getComponent($source)) !== null)
$message = $source->translate($category, $message, $language);
}
if ($params === array())
......@@ -557,7 +522,7 @@ class YiiBase
if (strpos($message, '#') === false)
{
$chunks = explode('|', $message);
$expressions = self::$_app->getLocale($language)->getPluralRules();
$expressions = self::$app->getLocale($language)->getPluralRules();
if ($n = min(count($chunks), count($expressions)))
{
for ($i = 0;$i < $n;$i++)
......
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