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<?php |
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namespace Wingu\OctopusCore\Reflection; |
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/** |
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* Reflection about a class constant. |
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*/ |
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class ReflectionConstant implements \Reflector |
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{ |
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use ReflectionDocCommentTrait; |
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/** |
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* The name of the constant. |
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* |
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* @var string |
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*/ |
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protected $name; |
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/** |
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* The value of the constant. |
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* |
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* @var mixed |
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*/ |
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protected $value; |
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/** |
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* The class where the constant has been declared. |
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* |
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* @var \Wingu\OctopusCore\Reflection\ReflectionClass |
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*/ |
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protected $declaringClass; |
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/** |
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* Constructor. |
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* |
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* @param string $class The name of the class where the constant has been declared. |
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* @param string $name The name of the constant to reflect. |
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*/ |
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public function __construct($class, $name) |
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{ |
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$this->declaringClass = new ReflectionClass($class); |
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$this->name = $name; |
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$this->value = $this->declaringClass->getConstant($name); |
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} |
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/** |
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* Get a reflection of the class where the constant has been declared. |
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* |
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* @return \Wingu\OctopusCore\Reflection\ReflectionClass |
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*/ |
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public function getDeclaringClass() |
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{ |
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return $this->declaringClass; |
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} |
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/** |
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* Get the value of the constant. |
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* |
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* @return mixed |
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*/ |
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public function getValue() |
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{ |
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return $this->value; |
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} |
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/** |
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* Get the name of the constant. |
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* |
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* @return string |
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*/ |
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public function getName() |
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{ |
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return $this->name; |
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} |
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/** |
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* Export the current constant reflection. |
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* |
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* @param string $className The class name where the constant is defined. |
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* @param string $constantName The name of the constant. |
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* @param boolean $return Flag if the export should be returned or not. |
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* @return string |
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*/ |
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public static function export($className, $constantName, $return = false) |
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{ |
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$export = new self($className, $constantName); |
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$export = (string)$export; |
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if ($return === true) { |
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return $export; |
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} else { |
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echo $export; |
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return null; |
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} |
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} |
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/** |
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* Return the string representation of the ReflectionConstant object. |
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* |
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* @return string |
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*/ |
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public function __toString() |
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{ |
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return 'Constant [ ' . gettype($this->value) . ' const ' . $this->getName() . ' ] { ' . $this->value . ' }'; |
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} |
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/** |
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* Return the string containing the current constant comment or false if there's no comment. |
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* |
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* @return string |
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*/ |
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public function getDocComment() |
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{ |
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$fileName = $this->getDeclaringClass()->getFileName(); |
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if ($fileName === false) { |
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return false; |
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} else { |
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return $this->getDocCommentFromFile($fileName); |
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} |
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} |
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/** |
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* Returns the doc comment from an existing filename or false if empty. |
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* |
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* @param string $fileName an existing filename |
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* @return string |
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*/ |
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private function getDocCommentFromFile($fileName) |
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{ |
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$lines = file($fileName, FILE_IGNORE_NEW_LINES); |
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$declaringClassStartLine = $this->getDeclaringClass()->getStartLine() - 1; |
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$declaringClassLength = $this->getDeclaringClass()->getEndLine() - $declaringClassStartLine + 1; |
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$currentClassLines = array_slice($lines, $declaringClassStartLine, $declaringClassLength, true); |
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// Need the php open tag to tokenize the class. |
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$tokens = token_get_all("<?php\n" . implode("\n", $currentClassLines)); |
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$return = false; |
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$constDeclarationKey = $this->getCurrentConstantKeyFromClassTokens($tokens); |
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// Now we have the key value of the constant declaration, we have to pick up the comment before the declaration (if it exists). |
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for ($constDeclarationKey--; $constDeclarationKey > 0; $constDeclarationKey--) { |
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if ($tokens[$constDeclarationKey][0] !== T_WHITESPACE && $tokens[$constDeclarationKey][0] !== T_DOC_COMMENT) { |
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break; |
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} elseif ($tokens[$constDeclarationKey][0] === T_DOC_COMMENT) { |
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$return = $tokens[$constDeclarationKey][1]; |
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break; |
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} |
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} |
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return $return; |
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} |
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/** |
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* Returns the current constant declaration key in the list of given tokens. Returns 0 if not found. |
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* |
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* @param array $tokens the array of tokens (see http://www.php.net/manual/en/ref.tokenizer.php) |
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* @return int |
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*/ |
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private function getCurrentConstantKeyFromClassTokens($tokens) |
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{ |
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$parsingStateConstDeclarationFound = false; |
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$constDeclarationKey = 0; |
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foreach ($tokens as $key => $token) { |
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if (is_array($token) === true && $token[0] === T_CONST) { |
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$parsingStateConstDeclarationFound = true; |
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$constDeclarationKey = $key; |
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} |
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if ($parsingStateConstDeclarationFound === true && $token[0] === T_STRING) { |
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if ($token[1] === $this->getName()) { |
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break; |
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} else { |
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$parsingStateConstDeclarationFound = false; |
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} |
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} |
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} |
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return $constDeclarationKey; |
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} |
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} |
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