php/external/PHPUnit/Util/Metrics/Class.php - shindig - Git at Google

 <?php
 /**
  * PHPUnit
  *
  * Copyright (c) 2002-2008, Sebastian Bergmann <sb@sebastian-bergmann.de>.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  *   * Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  *
  *   * Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in
  *     the documentation and/or other materials provided with the
  *     distribution.
  *
  *   * Neither the name of Sebastian Bergmann nor the names of his
  *     contributors may be used to endorse or promote products derived
  *     from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  *
  * @category   Testing
  * @package    PHPUnit
  * @author     Sebastian Bergmann <sb@sebastian-bergmann.de>
  * @copyright  2002-2008 Sebastian Bergmann <sb@sebastian-bergmann.de>
  * @license    http://www.opensource.org/licenses/bsd-license.php  BSD License
  * @version    SVN: $Id: Class.php 1985 2007-12-26 18:11:55Z sb $
  * @link       http://www.phpunit.de/
  * @since      File available since Release 3.2.0
  */

 require_once 'PHPUnit/Util/Class.php';
 require_once 'PHPUnit/Util/Metrics.php';
 require_once 'PHPUnit/Util/Filter.php';

 PHPUnit_Util_Filter::addFileToFilter(__FILE__, 'PHPUNIT');

 /**
  * Class-Level Metrics.
  *
  * @category   Testing
  * @package    PHPUnit
  * @author     Sebastian Bergmann <sb@sebastian-bergmann.de>
  * @copyright  2002-2008 Sebastian Bergmann <sb@sebastian-bergmann.de>
  * @license    http://www.opensource.org/licenses/bsd-license.php  BSD License
  * @version    Release: 3.2.9
  * @link       http://www.phpunit.de/
  * @since      Class available since Release 3.2.0
  */
 class PHPUnit_Util_Metrics_Class extends PHPUnit_Util_Metrics {
   protected $aif = 0;
   protected $ahf = 0;
   protected $ca = 0;
   protected $ce = 0;
   protected $coverage = 0;
   protected $dit = 0;
   protected $i = 0;
   protected $impl = 0;
   protected $loc = 0;
   protected $locExecutable = 0;
   protected $locExecuted = 0;
   protected $mif = 0;
   protected $mhf = 0;
   protected $noc = 0;
   protected $pf = 0;
   protected $vars = 0;
   protected $varsNp = 0;
   protected $varsI = 0;
   protected $wmc = 0;
   protected $wmcNp = 0;
   protected $wmcI = 0;

   protected $project;
   protected $package = '';
   protected $class;
   protected $methods = array();
   protected $inheritedMethods = array();
   protected $dependencies = array();
   protected $publicMethods = 0;

   protected static $cache = array();
   protected static $nocCache = array();

   /**
    * Constructor.
    *
    * @param  ReflectionClass $class
    * @param  array           $codeCoverage
    * @access protected
    */
   protected function __construct(ReflectionClass $class, &$codeCoverage = array()) {
     $this->class = $class;

     $className = $class->getName();

     $packageInformation = PHPUnit_Util_Class::getPackageInformation($className);

     if (! empty($packageInformation['fullPackage'])) {
       $this->package = $packageInformation['fullPackage'];
     }

     $this->setCoverage($codeCoverage);

     $this->dit = count(PHPUnit_Util_Class::getHierarchy($class->getName())) - 1;
     $this->impl = count($class->getInterfaces());

     foreach ($this->class->getMethods() as $method) {
       if ($method->getDeclaringClass()->getName() == $className) {
         $this->methods[$method->getName()] = PHPUnit_Util_Metrics_Function::factory($method, $codeCoverage);
       } else {
         $this->inheritedMethods[$method->getName()] = PHPUnit_Util_Metrics_Function::factory($method, $codeCoverage);
       }
     }

     $this->calculateAttributeMetrics();
     $this->calculateMethodMetrics();
     $this->calculateNumberOfChildren();
     $this->calculatePolymorphismFactor();
     $this->calculateDependencies();
   }

   /**
    * Factory.
    *
    * @param  ReflectionClass $class
    * @param  array           $codeCoverage
    * @return PHPUnit_Util_Metrics_Class
    * @access public
    * @static
    */
   public static function factory(ReflectionClass $class, &$codeCoverage = array()) {
     $className = $class->getName();

     if (! isset(self::$cache[$className])) {
       self::$cache[$className] = new PHPUnit_Util_Metrics_Class($class, $codeCoverage);
     }

     else if (! empty($codeCoverage) && self::$cache[$className]->getCoverage() == 0) {
       self::$cache[$className]->setCoverage($codeCoverage);
     }

     return self::$cache[$className];
   }

   /**
    * @param  array $codeCoverage
    * @access public
    */
   public function setCoverage(array &$codeCoverage) {
     if (! empty($codeCoverage)) {
       $this->calculateCodeCoverage($codeCoverage);

       foreach ($this->methods as $method) {
         $method->setCoverage($codeCoverage);
       }
     }
   }

   /**
    * @param  PHPUnit_Util_Metrics_Project $project
    * @access public
    */
   public function setProject(PHPUnit_Util_Metrics_Project $project) {
     $this->project = $project;

     $this->ca = 0;
     $this->ce = 0;
     $this->i = 0;
   }

   /**
    * Returns the class.
    *
    * @return ReflectionClass
    * @access public
    */
   public function getClass() {
     return $this->class;
   }

   /**
    * Returns the package of this class.
    *
    * @return string
    * @access public
    */
   public function getPackage() {
     return $this->package;
   }

   /**
    * Returns the methods of this class.
    *
    * @return array
    * @access public
    */
   public function getMethods() {
     return $this->methods;
   }

   /**
    * Returns the names of the classes this class depends on.
    *
    * @return array
    * @access public
    */
   public function getDependencies() {
     return $this->dependencies;
   }

   /**
    * Lines of Code (LOC).
    *
    * @return int
    * @access public
    */
   public function getLoc() {
     return $this->loc;
   }

   /**
    * Executable Lines of Code (ELOC).
    *
    * @return int
    * @access public
    */
   public function getLocExecutable() {
     return $this->locExecutable;
   }

   /**
    * Executed Lines of Code.
    *
    * @return int
    * @access public
    */
   public function getLocExecuted() {
     return $this->locExecuted;
   }

   /**
    * Returns the Number of Public Methods of the class.
    *
    * @return integer
    * @access public
    */
   public function getPublicMethods() {
     return $this->publicMethods;
   }

   /**
    * Returns the Attribute Inheritance Factor (AIF) for the class.
    *
    * @return integer
    * @access public
    * @see    http://www.aivosto.com/project/help/pm-oo-mood.html
    */
   public function getAIF() {
     return $this->aif;
   }

   /**
    * Returns the Attribute Hiding Factor (AHF) for the class.
    *
    * @return integer
    * @access public
    * @see    http://www.aivosto.com/project/help/pm-oo-mood.html
    */
   public function getAHF() {
     return $this->ahf;
   }

   /**
    * Returns the Afferent Couplings (Ca) for the class.
    *
    * The number of other classes that depend upon a class is an indicator of
    * the class' responsibility.
    *
    * @return integer
    * @access public
    */
   public function getCa() {
     $this->calculateDependencyMetrics();

     return $this->ca;
   }

   /**
    * Returns the Efferent Couplings (Ce) for the class.
    *
    * The number of other classes that the class depends upon is an indicator
    * of the class' independence.
    *
    * @return integer
    * @access public
    */
   public function getCe() {
     $this->calculateDependencyMetrics();

     return $this->ce;
   }

   /**
    * Returns the Class Size (CSZ) of the class.
    *
    * @return integer
    * @access public
    * @see    http://www.aivosto.com/project/help/pm-oo-misc.html
    */
   public function getCSZ() {
     return count($this->methods) + $this->vars;
   }

   /**
    * Returns the Class Interface Size (CIS) of the class.
    *
    * @return integer
    * @access public
    * @see    http://www.aivosto.com/project/help/pm-oo-misc.html
    */
   public function getCIS() {
     return $this->publicMethods + $this->varsNp;
   }

   /**
    * Returns the Code Coverage for the class.
    *
    * @return float
    * @access public
    */
   public function getCoverage() {
     return $this->coverage;
   }

   /**
    * Returns the Depth of Inheritance Tree (DIT) for the class.
    *
    * @return integer
    * @access public
    * @see    http://www.aivosto.com/project/help/pm-oo-ck.html
    */
   public function getDIT() {
     return $this->dit;
   }

   /**
    * Returns the Instability (I) for the class.
    *
    * The ratio of efferent coupling (Ce) to total coupling (Ce + Ca) such that
    * I = Ce / (Ce + Ca). This metric is an indicator of the class' resilience
    * to change.
    *
    * The range for this metric is 0 to 1, with I=0 indicating a completely
    * stable class and I=1 indicating a completely instable class.
    *
    * @return float
    * @access public
    */
   public function getI() {
     $this->calculateDependencyMetrics();

     return $this->i;
   }

   /**
    * Returns the Number of Interfaces Implemented by the class (IMPL).
    *
    * @return integer
    * @access public
    * @see    http://www.aivosto.com/project/help/pm-oo-misc.html
    */
   public function getIMPL() {
     return $this->impl;
   }

   /**
    * Returns the Method Inheritance Factor (MIF) for the class.
    *
    * @return float
    * @access public
    * @see    http://www.aivosto.com/project/help/pm-oo-mood.html
    */
   public function getMIF() {
     return $this->mif;
   }

   /**
    * Returns the Method Hiding Factor (MHF) for the class.
    *
    * @return float
    * @access public
    * @see    http://www.aivosto.com/project/help/pm-oo-mood.html
    */
   public function getMHF() {
     return $this->mhf;
   }

   /**
    * Returns the Number of Children (NOC) for the class.
    *
    * @return integer
    * @access public
    * @see    http://www.aivosto.com/project/help/pm-oo-ck.html
    */
   public function getNOC() {
     return $this->noc;
   }

   /**
    * Returns the Polymorphism Factor (PF) for the class.
    *
    * @return float
    * @access public
    * @see    http://www.aivosto.com/project/help/pm-oo-mood.html
    */
   public function getPF() {
     return $this->pf;
   }

   /**
    * Returns the Number of Variables (VARS) defined by the class.
    *
    * @return integer
    * @access public
    * @see    http://www.aivosto.com/project/help/pm-oo-misc.html
    */
   public function getVARS() {
     return $this->vars;
   }

   /**
    * Returns the Number of Non-Private Variables (VARSnp) defined by the class.
    *
    * @return integer
    * @access public
    * @see    http://www.aivosto.com/project/help/pm-oo-misc.html
    */
   public function getVARSnp() {
     return $this->varsNp;
   }

   /**
    * Returns the Number of Variables (VARSi) defined and inherited by the class.
    *
    * @return integer
    * @access public
    * @see    http://www.aivosto.com/project/help/pm-oo-misc.html
    */
   public function getVARSi() {
     return $this->varsI;
   }

   /**
    * Returns the Weighted Methods Per Class (WMC) for the class.
    *
    * @return integer
    * @access public
    * @see    http://www.aivosto.com/project/help/pm-oo-ck.html
    */
   public function getWMC() {
     return $this->wmc;
   }

   /**
    * Returns the Weighted Non-Private Methods Per Class (WMCnp) for the class.
    *
    * @return integer
    * @access public
    * @see    http://www.aivosto.com/project/help/pm-oo-misc.html
    */
   public function getWMCnp() {
     return $this->wmcNp;
   }

   /**
    * Returns the Weighted Inherited Methods Per Class (WMCi) for the class.
    *
    * @return integer
    * @access public
    * @see    http://www.aivosto.com/project/help/pm-oo-misc.html
    */
   public function getWMCi() {
     return $this->wmcI;
   }

   /**
    * Calculates the Attribute Inheritance Factor (AIF) and
    * Attribute Hiding Factor (AHF) metrics for the class.
    *
    * @access protected
    */
   protected function calculateAttributeMetrics() {
     $attributes = 0;
     $hiddenAttributes = 0;
     $inheritedAttributes = 0;

     foreach ($this->class->getProperties() as $attribute) {
       if ($attribute->isPublic()) {
         $this->varsNp ++;
       } else {
         $hiddenAttributes ++;
       }

       if ($attribute->getDeclaringClass()->getName() == $this->class->getName()) {
         $this->vars ++;
       } else {
         $inheritedAttributes ++;
       }

       $this->varsI ++;
       $attributes ++;
     }

     if ($attributes > 0) {
       $this->aif = (100 * $inheritedAttributes) / $attributes;
       $this->ahf = (100 * $hiddenAttributes) / $attributes;
     }
   }

   /**
    * Calculates the Method Inheritance Factor (MIF)
    * Method Hiding Factor (MHF), Weighted Methods Per Class (WMC),
    * Weighted Non-Private Methods Per Class (WMCnp), and
    * Weighted Inherited Methods Per Class (WMCi) metrics for the class.
    *
    * @access protected
    */
   protected function calculateMethodMetrics() {
     $numMethods = 0;
     $hiddenMethods = 0;
     $inheritedMethods = 0;

     $methods = array_merge($this->methods, $this->inheritedMethods);

     foreach ($methods as $method) {
       $ccn = $method->getCCN();

       if ($method->getMethod()->getDeclaringClass()->getName() == $this->class->getName()) {
         $this->wmc += $ccn;

         if ($method->getMethod()->isPublic()) {
           $this->publicMethods ++;
           $this->wmcNp += $ccn;
         }
       } else {
         $inheritedMethods ++;
       }

       if (! $method->getMethod()->isPublic()) {
         $hiddenMethods ++;
       }

       $this->wmcI += $ccn;
       $numMethods ++;
     }

     if ($numMethods > 0) {
       $this->mif = (100 * $inheritedMethods) / $numMethods;
       $this->mhf = (100 * $hiddenMethods) / $numMethods;
     }
   }

   /**
    * Calculates the Number of Children (NOC) metric for the class.
    *
    * @access protected
    */
   protected function calculateNumberOfChildren() {
     $className = $this->class->getName();

     if (! isset(self::$nocCache[$className])) {
       self::$nocCache = array();
     }

     if (empty(self::$nocCache)) {
       foreach (get_declared_classes() as $_className) {
         $class = new ReflectionClass($_className);
         $parent = $class->getParentClass();

         if ($parent !== FALSE) {
           $parentName = $parent->getName();

           if (isset(self::$nocCache[$parentName])) {
             self::$nocCache[$parentName] ++;
           } else {
             self::$nocCache[$parentName] = 1;
           }
         }
       }
     }

     if (isset(self::$nocCache[$className])) {
       $this->noc = self::$nocCache[$className];
     }
   }

   /**
    * Calculates the Polymorphism Factor (PF) metric for the class.
    *
    * @param  ReflectionClass $class
    * @access protected
    */
   protected function calculatePolymorphismFactor() {
     $parentClass = $this->class->getParentClass();

     if ($parentClass !== FALSE) {
       $overridableMethods = array();

       foreach ($parentClass->getMethods() as $method) {
         if (! $method->isPrivate() && ! $method->isFinal() && ! $method->isAbstract()) {
           $overridableMethods[] = $method->getName();
         }
       }

       if (! empty($overridableMethods)) {
         $overriddenMethods = 0;

         foreach ($this->class->getMethods() as $method) {
           if ($method->getDeclaringClass()->getName() == $this->class->getName()) {
             $methodName = $method->getName();

             if (in_array($methodName, $overridableMethods)) {
               $overriddenMethods ++;
             }
           }
         }

         $this->pf = (100 * $overriddenMethods) / count($overridableMethods);
       }
     }
   }

   /**
    * Calculates the Code Coverage for the class.
    *
    * @param  array $codeCoverage
    * @access protected
    */
   protected function calculateCodeCoverage(&$codeCoverage) {
     $statistics = PHPUnit_Util_CodeCoverage::getStatistics($codeCoverage, $this->class->getFileName(), $this->class->getStartLine(), $this->class->getEndLine());

     $this->coverage = $statistics['coverage'];
     $this->loc = $statistics['loc'];
     $this->locExecutable = $statistics['locExecutable'];
     $this->locExecuted = $statistics['locExecuted'];
   }

   /**
    * Calculates the dependencies for this class.
    *
    * @access protected
    */
   protected function calculateDependencies() {
     $parent = $this->class->getParentClass();

     if ($parent && $parent->isUserDefined() && ! in_array($parent->getName(), $this->dependencies)) {
       $this->dependencies[] = $parent->getName();
     }

     $interfaces = $this->class->getInterfaces();

     foreach ($interfaces as $interface) {
       if ($interface->isUserDefined() && ! in_array($interface->getName(), $this->dependencies)) {
         $this->dependencies[] = $interface->getName();
       }
     }

     $methods = array_merge($this->methods, $this->inheritedMethods);

     foreach ($methods as $method) {
       foreach ($method->getDependencies() as $dependency) {
         if (! in_array($dependency, $this->dependencies)) {
           $this->dependencies[] = $dependency;
         }
       }
     }
   }

   /**
    * Calculates the dependency-based metrics for this class.
    *
    * @access protected
    */
   protected function calculateDependencyMetrics() {
     if ($this->ca == 0 && $this->ce == 0 && $this->i == 0) {
       $className = $this->class->getName();
       $dependencies = $this->project->getDependencies();

       foreach ($dependencies[$className] as $dependency) {
         if ($dependency > 0) {
           $this->ce ++;
         }
       }

       unset($dependencies[$className]);

       foreach ($dependencies as $_className => $_dependencies) {
         if ($_dependencies[$className] > 0) {
           $this->ca ++;
         }
       }

       $sum = $this->ce + $this->ca;

       if ($sum > 0) {
         $this->i = $this->ce / $sum;
       }
     }
   }
 }
 ?>
	<?php
	/**
	* PHPUnit
	*
	* Copyright (c) 2002-2008, Sebastian Bergmann <sb@sebastian-bergmann.de>.
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	*
	* * Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	*
	* * Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in
	* the documentation and/or other materials provided with the
	* distribution.
	*
	* * Neither the name of Sebastian Bergmann nor the names of his
	* contributors may be used to endorse or promote products derived
	* from this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
	* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
	* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
	* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
	* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
	* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	* POSSIBILITY OF SUCH DAMAGE.
	*
	* @category Testing
	* @package PHPUnit
	* @author Sebastian Bergmann <sb@sebastian-bergmann.de>
	* @copyright 2002-2008 Sebastian Bergmann <sb@sebastian-bergmann.de>
	* @license http://www.opensource.org/licenses/bsd-license.php BSD License
	* @version SVN: $Id: Class.php 1985 2007-12-26 18:11:55Z sb $
	* @link http://www.phpunit.de/
	* @since File available since Release 3.2.0
	*/

	require_once 'PHPUnit/Util/Class.php';
	require_once 'PHPUnit/Util/Metrics.php';
	require_once 'PHPUnit/Util/Filter.php';

	PHPUnit_Util_Filter::addFileToFilter(__FILE__, 'PHPUNIT');

	/**
	* Class-Level Metrics.
	*
	* @category Testing
	* @package PHPUnit
	* @author Sebastian Bergmann <sb@sebastian-bergmann.de>
	* @copyright 2002-2008 Sebastian Bergmann <sb@sebastian-bergmann.de>
	* @license http://www.opensource.org/licenses/bsd-license.php BSD License
	* @version Release: 3.2.9
	* @link http://www.phpunit.de/
	* @since Class available since Release 3.2.0
	*/
	class PHPUnit_Util_Metrics_Class extends PHPUnit_Util_Metrics {
	protected $aif = 0;
	protected $ahf = 0;
	protected $ca = 0;
	protected $ce = 0;
	protected $coverage = 0;
	protected $dit = 0;
	protected $i = 0;
	protected $impl = 0;
	protected $loc = 0;
	protected $locExecutable = 0;
	protected $locExecuted = 0;
	protected $mif = 0;
	protected $mhf = 0;
	protected $noc = 0;
	protected $pf = 0;
	protected $vars = 0;
	protected $varsNp = 0;
	protected $varsI = 0;
	protected $wmc = 0;
	protected $wmcNp = 0;
	protected $wmcI = 0;

	protected $project;
	protected $package = '';
	protected $class;
	protected $methods = array();
	protected $inheritedMethods = array();
	protected $dependencies = array();
	protected $publicMethods = 0;

	protected static $cache = array();
	protected static $nocCache = array();

	/**
	* Constructor.
	*
	* @param ReflectionClass $class
	* @param array $codeCoverage
	* @access protected
	*/
	protected function __construct(ReflectionClass $class, &$codeCoverage = array()) {
	$this->class = $class;

	$className = $class->getName();

	$packageInformation = PHPUnit_Util_Class::getPackageInformation($className);

	if (! empty($packageInformation['fullPackage'])) {
	$this->package = $packageInformation['fullPackage'];
	}

	$this->setCoverage($codeCoverage);

	$this->dit = count(PHPUnit_Util_Class::getHierarchy($class->getName())) - 1;
	$this->impl = count($class->getInterfaces());

	foreach ($this->class->getMethods() as $method) {
	if ($method->getDeclaringClass()->getName() == $className) {
	$this->methods[$method->getName()] = PHPUnit_Util_Metrics_Function::factory($method, $codeCoverage);
	} else {
	$this->inheritedMethods[$method->getName()] = PHPUnit_Util_Metrics_Function::factory($method, $codeCoverage);
	}
	}

	$this->calculateAttributeMetrics();
	$this->calculateMethodMetrics();
	$this->calculateNumberOfChildren();
	$this->calculatePolymorphismFactor();
	$this->calculateDependencies();
	}

	/**
	* Factory.
	*
	* @param ReflectionClass $class
	* @param array $codeCoverage
	* @return PHPUnit_Util_Metrics_Class
	* @access public
	* @static
	*/
	public static function factory(ReflectionClass $class, &$codeCoverage = array()) {
	$className = $class->getName();

	if (! isset(self::$cache[$className])) {
	self::$cache[$className] = new PHPUnit_Util_Metrics_Class($class, $codeCoverage);
	}

	else if (! empty($codeCoverage) && self::$cache[$className]->getCoverage() == 0) {
	self::$cache[$className]->setCoverage($codeCoverage);
	}

	return self::$cache[$className];
	}

	/**
	* @param array $codeCoverage
	* @access public
	*/
	public function setCoverage(array &$codeCoverage) {
	if (! empty($codeCoverage)) {
	$this->calculateCodeCoverage($codeCoverage);

	foreach ($this->methods as $method) {
	$method->setCoverage($codeCoverage);
	}
	}
	}

	/**
	* @param PHPUnit_Util_Metrics_Project $project
	* @access public
	*/
	public function setProject(PHPUnit_Util_Metrics_Project $project) {
	$this->project = $project;

	$this->ca = 0;
	$this->ce = 0;
	$this->i = 0;
	}

	/**
	* Returns the class.
	*
	* @return ReflectionClass
	* @access public
	*/
	public function getClass() {
	return $this->class;
	}

	/**
	* Returns the package of this class.
	*
	* @return string
	* @access public
	*/
	public function getPackage() {
	return $this->package;
	}

	/**
	* Returns the methods of this class.
	*
	* @return array
	* @access public
	*/
	public function getMethods() {
	return $this->methods;
	}

	/**
	* Returns the names of the classes this class depends on.
	*
	* @return array
	* @access public
	*/
	public function getDependencies() {
	return $this->dependencies;
	}

	/**
	* Lines of Code (LOC).
	*
	* @return int
	* @access public
	*/
	public function getLoc() {
	return $this->loc;
	}

	/**
	* Executable Lines of Code (ELOC).
	*
	* @return int
	* @access public
	*/
	public function getLocExecutable() {
	return $this->locExecutable;
	}

	/**
	* Executed Lines of Code.
	*
	* @return int
	* @access public
	*/
	public function getLocExecuted() {
	return $this->locExecuted;
	}

	/**
	* Returns the Number of Public Methods of the class.
	*
	* @return integer
	* @access public
	*/
	public function getPublicMethods() {
	return $this->publicMethods;
	}

	/**
	* Returns the Attribute Inheritance Factor (AIF) for the class.
	*
	* @return integer
	* @access public
	* @see http://www.aivosto.com/project/help/pm-oo-mood.html
	*/
	public function getAIF() {
	return $this->aif;
	}

	/**
	* Returns the Attribute Hiding Factor (AHF) for the class.
	*
	* @return integer
	* @access public
	* @see http://www.aivosto.com/project/help/pm-oo-mood.html
	*/
	public function getAHF() {
	return $this->ahf;
	}

	/**
	* Returns the Afferent Couplings (Ca) for the class.
	*
	* The number of other classes that depend upon a class is an indicator of
	* the class' responsibility.
	*
	* @return integer
	* @access public
	*/
	public function getCa() {
	$this->calculateDependencyMetrics();

	return $this->ca;
	}

	/**
	* Returns the Efferent Couplings (Ce) for the class.
	*
	* The number of other classes that the class depends upon is an indicator
	* of the class' independence.
	*
	* @return integer
	* @access public
	*/
	public function getCe() {
	$this->calculateDependencyMetrics();

	return $this->ce;
	}

	/**
	* Returns the Class Size (CSZ) of the class.
	*
	* @return integer
	* @access public
	* @see http://www.aivosto.com/project/help/pm-oo-misc.html
	*/
	public function getCSZ() {
	return count($this->methods) + $this->vars;
	}

	/**
	* Returns the Class Interface Size (CIS) of the class.
	*
	* @return integer
	* @access public
	* @see http://www.aivosto.com/project/help/pm-oo-misc.html
	*/
	public function getCIS() {
	return $this->publicMethods + $this->varsNp;
	}

	/**
	* Returns the Code Coverage for the class.
	*
	* @return float
	* @access public
	*/
	public function getCoverage() {
	return $this->coverage;
	}

	/**
	* Returns the Depth of Inheritance Tree (DIT) for the class.
	*
	* @return integer
	* @access public
	* @see http://www.aivosto.com/project/help/pm-oo-ck.html
	*/
	public function getDIT() {
	return $this->dit;
	}

	/**
	* Returns the Instability (I) for the class.
	*
	* The ratio of efferent coupling (Ce) to total coupling (Ce + Ca) such that
	* I = Ce / (Ce + Ca). This metric is an indicator of the class' resilience
	* to change.
	*
	* The range for this metric is 0 to 1, with I=0 indicating a completely
	* stable class and I=1 indicating a completely instable class.
	*
	* @return float
	* @access public
	*/
	public function getI() {
	$this->calculateDependencyMetrics();

	return $this->i;
	}

	/**
	* Returns the Number of Interfaces Implemented by the class (IMPL).
	*
	* @return integer
	* @access public
	* @see http://www.aivosto.com/project/help/pm-oo-misc.html
	*/
	public function getIMPL() {
	return $this->impl;
	}

	/**
	* Returns the Method Inheritance Factor (MIF) for the class.
	*
	* @return float
	* @access public
	* @see http://www.aivosto.com/project/help/pm-oo-mood.html
	*/
	public function getMIF() {
	return $this->mif;
	}

	/**
	* Returns the Method Hiding Factor (MHF) for the class.
	*
	* @return float
	* @access public
	* @see http://www.aivosto.com/project/help/pm-oo-mood.html
	*/
	public function getMHF() {
	return $this->mhf;
	}

	/**
	* Returns the Number of Children (NOC) for the class.
	*
	* @return integer
	* @access public
	* @see http://www.aivosto.com/project/help/pm-oo-ck.html
	*/
	public function getNOC() {
	return $this->noc;
	}

	/**
	* Returns the Polymorphism Factor (PF) for the class.
	*
	* @return float
	* @access public
	* @see http://www.aivosto.com/project/help/pm-oo-mood.html
	*/
	public function getPF() {
	return $this->pf;
	}

	/**
	* Returns the Number of Variables (VARS) defined by the class.
	*
	* @return integer
	* @access public
	* @see http://www.aivosto.com/project/help/pm-oo-misc.html
	*/
	public function getVARS() {
	return $this->vars;
	}

	/**
	* Returns the Number of Non-Private Variables (VARSnp) defined by the class.
	*
	* @return integer
	* @access public
	* @see http://www.aivosto.com/project/help/pm-oo-misc.html
	*/
	public function getVARSnp() {
	return $this->varsNp;
	}

	/**
	* Returns the Number of Variables (VARSi) defined and inherited by the class.
	*
	* @return integer
	* @access public
	* @see http://www.aivosto.com/project/help/pm-oo-misc.html
	*/
	public function getVARSi() {
	return $this->varsI;
	}

	/**
	* Returns the Weighted Methods Per Class (WMC) for the class.
	*
	* @return integer
	* @access public
	* @see http://www.aivosto.com/project/help/pm-oo-ck.html
	*/
	public function getWMC() {
	return $this->wmc;
	}

	/**
	* Returns the Weighted Non-Private Methods Per Class (WMCnp) for the class.
	*
	* @return integer
	* @access public
	* @see http://www.aivosto.com/project/help/pm-oo-misc.html
	*/
	public function getWMCnp() {
	return $this->wmcNp;
	}

	/**
	* Returns the Weighted Inherited Methods Per Class (WMCi) for the class.
	*
	* @return integer
	* @access public
	* @see http://www.aivosto.com/project/help/pm-oo-misc.html
	*/
	public function getWMCi() {
	return $this->wmcI;
	}

	/**
	* Calculates the Attribute Inheritance Factor (AIF) and
	* Attribute Hiding Factor (AHF) metrics for the class.
	*
	* @access protected
	*/
	protected function calculateAttributeMetrics() {
	$attributes = 0;
	$hiddenAttributes = 0;
	$inheritedAttributes = 0;

	foreach ($this->class->getProperties() as $attribute) {
	if ($attribute->isPublic()) {
	$this->varsNp ++;
	} else {
	$hiddenAttributes ++;
	}

	if ($attribute->getDeclaringClass()->getName() == $this->class->getName()) {
	$this->vars ++;
	} else {
	$inheritedAttributes ++;
	}

	$this->varsI ++;
	$attributes ++;
	}

	if ($attributes > 0) {
	$this->aif = (100 * $inheritedAttributes) / $attributes;
	$this->ahf = (100 * $hiddenAttributes) / $attributes;
	}
	}

	/**
	* Calculates the Method Inheritance Factor (MIF)
	* Method Hiding Factor (MHF), Weighted Methods Per Class (WMC),
	* Weighted Non-Private Methods Per Class (WMCnp), and
	* Weighted Inherited Methods Per Class (WMCi) metrics for the class.
	*
	* @access protected
	*/
	protected function calculateMethodMetrics() {
	$numMethods = 0;
	$hiddenMethods = 0;
	$inheritedMethods = 0;

	$methods = array_merge($this->methods, $this->inheritedMethods);

	foreach ($methods as $method) {
	$ccn = $method->getCCN();

	if ($method->getMethod()->getDeclaringClass()->getName() == $this->class->getName()) {
	$this->wmc += $ccn;

	if ($method->getMethod()->isPublic()) {
	$this->publicMethods ++;
	$this->wmcNp += $ccn;
	}
	} else {
	$inheritedMethods ++;
	}

	if (! $method->getMethod()->isPublic()) {
	$hiddenMethods ++;
	}

	$this->wmcI += $ccn;
	$numMethods ++;
	}

	if ($numMethods > 0) {
	$this->mif = (100 * $inheritedMethods) / $numMethods;
	$this->mhf = (100 * $hiddenMethods) / $numMethods;
	}
	}

	/**
	* Calculates the Number of Children (NOC) metric for the class.
	*
	* @access protected
	*/
	protected function calculateNumberOfChildren() {
	$className = $this->class->getName();

	if (! isset(self::$nocCache[$className])) {
	self::$nocCache = array();
	}

	if (empty(self::$nocCache)) {
	foreach (get_declared_classes() as $_className) {
	$class = new ReflectionClass($_className);
	$parent = $class->getParentClass();

	if ($parent !== FALSE) {
	$parentName = $parent->getName();

	if (isset(self::$nocCache[$parentName])) {
	self::$nocCache[$parentName] ++;
	} else {
	self::$nocCache[$parentName] = 1;
	}
	}
	}
	}

	if (isset(self::$nocCache[$className])) {
	$this->noc = self::$nocCache[$className];
	}
	}

	/**
	* Calculates the Polymorphism Factor (PF) metric for the class.
	*
	* @param ReflectionClass $class
	* @access protected
	*/
	protected function calculatePolymorphismFactor() {
	$parentClass = $this->class->getParentClass();

	if ($parentClass !== FALSE) {
	$overridableMethods = array();

	foreach ($parentClass->getMethods() as $method) {
	if (! $method->isPrivate() && ! $method->isFinal() && ! $method->isAbstract()) {
	$overridableMethods[] = $method->getName();
	}
	}

	if (! empty($overridableMethods)) {
	$overriddenMethods = 0;

	foreach ($this->class->getMethods() as $method) {
	if ($method->getDeclaringClass()->getName() == $this->class->getName()) {
	$methodName = $method->getName();

	if (in_array($methodName, $overridableMethods)) {
	$overriddenMethods ++;
	}
	}
	}

	$this->pf = (100 * $overriddenMethods) / count($overridableMethods);
	}
	}
	}

	/**
	* Calculates the Code Coverage for the class.
	*
	* @param array $codeCoverage
	* @access protected
	*/
	protected function calculateCodeCoverage(&$codeCoverage) {
	$statistics = PHPUnit_Util_CodeCoverage::getStatistics($codeCoverage, $this->class->getFileName(), $this->class->getStartLine(), $this->class->getEndLine());

	$this->coverage = $statistics['coverage'];
	$this->loc = $statistics['loc'];
	$this->locExecutable = $statistics['locExecutable'];
	$this->locExecuted = $statistics['locExecuted'];
	}

	/**
	* Calculates the dependencies for this class.
	*
	* @access protected
	*/
	protected function calculateDependencies() {
	$parent = $this->class->getParentClass();

	if ($parent && $parent->isUserDefined() && ! in_array($parent->getName(), $this->dependencies)) {
	$this->dependencies[] = $parent->getName();
	}

	$interfaces = $this->class->getInterfaces();

	foreach ($interfaces as $interface) {
	if ($interface->isUserDefined() && ! in_array($interface->getName(), $this->dependencies)) {
	$this->dependencies[] = $interface->getName();
	}
	}

	$methods = array_merge($this->methods, $this->inheritedMethods);

	foreach ($methods as $method) {
	foreach ($method->getDependencies() as $dependency) {
	if (! in_array($dependency, $this->dependencies)) {
	$this->dependencies[] = $dependency;
	}
	}
	}
	}

	/**
	* Calculates the dependency-based metrics for this class.
	*
	* @access protected
	*/
	protected function calculateDependencyMetrics() {
	if ($this->ca == 0 && $this->ce == 0 && $this->i == 0) {
	$className = $this->class->getName();
	$dependencies = $this->project->getDependencies();

	foreach ($dependencies[$className] as $dependency) {
	if ($dependency > 0) {
	$this->ce ++;
	}
	}

	unset($dependencies[$className]);

	foreach ($dependencies as $_className => $_dependencies) {
	if ($_dependencies[$className] > 0) {
	$this->ca ++;
	}
	}

	$sum = $this->ce + $this->ca;

	if ($sum > 0) {
	$this->i = $this->ce / $sum;
	}
	}
	}
	}
	?>