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   1  <?php
   2  /*
   3   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   4   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   5   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   6   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   7   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   8   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   9   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  10   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  11   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  12   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  13   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  14   *
  15   * This software consists of voluntary contributions made by many individuals
  16   * and is licensed under the MIT license.
  17   */
  18  
  19  namespace ProxyManager\ProxyGenerator;
  20  
  21  use ProxyManager\Generator\Util\ClassGeneratorUtils;
  22  use ProxyManager\ProxyGenerator\Assertion\CanProxyAssertion;
  23  use ProxyManager\ProxyGenerator\NullObject\MethodGenerator\Constructor;
  24  use ProxyManager\ProxyGenerator\NullObject\MethodGenerator\NullObjectMethodInterceptor;
  25  use ProxyManager\ProxyGenerator\Util\ProxiedMethodsFilter;
  26  use ReflectionClass;
  27  use Zend\Code\Generator\ClassGenerator;
  28  use Zend\Code\Reflection\MethodReflection;
  29  
  30  /**
  31   * Generator for proxies implementing {@see \ProxyManager\Proxy\NullObjectInterface}
  32   *
  33   * {@inheritDoc}
  34   *
  35   * @author Vincent Blanchon <blanchon.vincent@gmail.com>
  36   * @license MIT
  37   */
  38  class NullObjectGenerator implements ProxyGeneratorInterface
  39  {
  40      /**
  41       * {@inheritDoc}
  42       */
  43      public function generate(ReflectionClass $originalClass, ClassGenerator $classGenerator)
  44      {
  45          CanProxyAssertion::assertClassCanBeProxied($originalClass);
  46  
  47          $interfaces = array('ProxyManager\\Proxy\\NullObjectInterface');
  48  
  49          if ($originalClass->isInterface()) {
  50              $interfaces[] = $originalClass->getName();
  51          }
  52  
  53          $classGenerator->setImplementedInterfaces($interfaces);
  54  
  55          foreach (ProxiedMethodsFilter::getProxiedMethods($originalClass) as $method) {
  56              $classGenerator->addMethodFromGenerator(
  57                  NullObjectMethodInterceptor::generateMethod(
  58                      new MethodReflection($method->getDeclaringClass()->getName(), $method->getName())
  59                  )
  60              );
  61          }
  62  
  63          ClassGeneratorUtils::addMethodIfNotFinal($originalClass, $classGenerator, new Constructor($originalClass));
  64      }
  65  }