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<?php |
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/** |
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* \AppserverIo\Doppelgaenger\Entities\Pointcuts\AbstractSignaturePointcut |
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* |
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* NOTICE OF LICENSE |
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* |
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* This source file is subject to the Open Software License (OSL 3.0) |
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* that is available through the world-wide-web at this URL: |
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* http://opensource.org/licenses/osl-3.0.php |
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* |
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* PHP version 5 |
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* |
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* @author Bernhard Wick <[email protected]> |
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* @copyright 2015 TechDivision GmbH - <[email protected]> |
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* @license http://opensource.org/licenses/osl-3.0.php Open Software License (OSL 3.0) |
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* @link https://github.com/appserver-io/doppelgaenger |
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* @link http://www.appserver.io/ |
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*/ |
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namespace AppserverIo\Doppelgaenger\Entities\Pointcuts; |
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use AppserverIo\Doppelgaenger\Dictionaries\PointcutPatterns; |
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use AppserverIo\Doppelgaenger\Entities\Definitions\FunctionDefinition; |
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use AppserverIo\Doppelgaenger\Entities\Definitions\AttributeDefinition; |
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/** |
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* Abstract parent class for pointcuts which accept expressions which express a signature like pattern |
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* |
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* @author Bernhard Wick <[email protected]> |
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* @copyright 2015 TechDivision GmbH - <[email protected]> |
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* @license http://opensource.org/licenses/osl-3.0.php Open Software License (OSL 3.0) |
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* @link https://github.com/appserver-io/doppelgaenger |
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* @link http://www.appserver.io/ |
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*/ |
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abstract class AbstractSignaturePointcut extends AbstractPointcut |
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{ |
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/** |
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* Call type for a call from an object |
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* |
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* @var string CALL_TYPE_OBJECT |
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*/ |
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const CALL_TYPE_OBJECT = '->'; |
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/** |
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* Call type for a static call |
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* |
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* @var string CALL_TYPE_STATIC |
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*/ |
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const CALL_TYPE_STATIC = '::'; |
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/** |
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* The pattern used by this pointcut to match candidates |
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* |
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* @var string MATCH_PATTERN |
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*/ |
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const MATCH_PATTERN = PointcutPatterns::SIGNATURE; |
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/** |
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* The type of the call made to $function |
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* |
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* @var string|null $callType |
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* |
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* @Enum({"->", "::", null}) |
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*/ |
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protected $callType; |
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/** |
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* Function/method which will get called within the signature expression |
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* |
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* @var string $function |
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*/ |
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protected $function; |
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/** |
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* Structure name (if any) of the structure the called method belongs to |
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* |
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* @var string|null $structure |
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*/ |
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protected $structure; |
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/** |
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* Default constructor |
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* |
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* @param string $expression String representing the expression defining this pointcut |
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* @param boolean $isNegated If any match made against this pointcut's expression has to be negated in its result |
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*/ |
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public function __construct($expression, $isNegated) |
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{ |
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parent::__construct($expression, $isNegated); |
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// filter what we need |
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if (strpos($expression, self::CALL_TYPE_OBJECT) !== false || strpos($expression, self::CALL_TYPE_STATIC) !== false) { |
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// assume an object call but correct the call type in the unlikely case we did get a static call |
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$this->callType = self::CALL_TYPE_OBJECT; |
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if (strpos($expression, self::CALL_TYPE_STATIC) !== false) { |
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$this->callType = self::CALL_TYPE_STATIC; |
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} |
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// we have to isolate the parts of the expression |
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$this->structure = strstr($expression, $this->callType, true); |
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$this->function = str_replace($this->structure . $this->callType, '', $expression); |
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} else { |
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$this->callType = null; |
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$this->structure = null; |
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$this->function = null; |
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} |
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} |
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/** |
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* Will return a chain of callbacks which can be used to call woven code in an onion like manner |
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* |
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* @param \AppserverIo\Doppelgaenger\Entities\Definitions\FunctionDefinition $functionDefinition Definition of the function to inject invocation code into |
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* |
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* @return array |
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*/ |
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public function getCallbackChain(FunctionDefinition $functionDefinition) |
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{ |
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if ($this->callType === self::CALL_TYPE_STATIC) { |
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// we can work with the structure name alone if we have a static call |
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return array(array($this->structure, $this->function)); |
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} elseif (ltrim($this->structure, '\\') === $functionDefinition->getStructureName()) { |
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// if the callback chain is used within the actual class we can use the current context |
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return array(array('$this', $this->function)); |
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} else { |
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// for everything else (mostly advice chain callbacks) we will create a new instance |
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return array(array('new ' . $this->structure . '()', $this->function)); |
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} |
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} |
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/** |
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* Used to "straighten out" an expression as some expressions allow for shell regex which makes them hard to |
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* generate code from. |
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* So with this method a matching pointcut can be altered into having a directly readable expression |
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* |
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* @param FunctionDefinition|AttributeDefinition $definition Definition to straighten the expression against |
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* |
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* @return null |
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*/ |
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public function straightenExpression($definition) |
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{ |
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// structure name has to be absolute |
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$structureName = '\\' . ltrim($definition->getStructureName(), '\\'); |
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// fix the expression |
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$this->expression = str_replace( |
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array($this->callType . $this->function, $this->structure), |
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array($this->callType . $definition->getName(), $structureName), |
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$this->getExpression() |
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); |
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// set the obvious properties |
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$this->function = $definition->getName(); |
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$this->structure = $structureName; |
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} |
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} |
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appserver-io /
doppelgaenger
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