415 lines
15 KiB
PHP
415 lines
15 KiB
PHP
<?php
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/*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information, see
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* <http://www.doctrine-project.org>.
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*/
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namespace Doctrine\ORM\Proxy;
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use Doctrine\ORM\EntityManager,
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Doctrine\ORM\Mapping\ClassMetadata,
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Doctrine\Common\Util\ClassUtils;
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/**
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* This factory is used to create proxy objects for entities at runtime.
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*
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* @author Roman Borschel <roman@code-factory.org>
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* @author Giorgio Sironi <piccoloprincipeazzurro@gmail.com>
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* @since 2.0
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*/
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class ProxyFactory
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{
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/** The EntityManager this factory is bound to. */
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private $_em;
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/** Whether to automatically (re)generate proxy classes. */
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private $_autoGenerate;
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/** The namespace that contains all proxy classes. */
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private $_proxyNamespace;
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/** The directory that contains all proxy classes. */
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private $_proxyDir;
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/**
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* Used to match very simple id methods that don't need
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* to be proxied since the identifier is known.
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*
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* @var string
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*/
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const PATTERN_MATCH_ID_METHOD = '((public\s)?(function\s{1,}%s\s?\(\)\s{1,})\s{0,}{\s{0,}return\s{0,}\$this->%s;\s{0,}})i';
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/**
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* Initializes a new instance of the <tt>ProxyFactory</tt> class that is
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* connected to the given <tt>EntityManager</tt>.
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*
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* @param EntityManager $em The EntityManager the new factory works for.
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* @param string $proxyDir The directory to use for the proxy classes. It must exist.
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* @param string $proxyNs The namespace to use for the proxy classes.
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* @param boolean $autoGenerate Whether to automatically generate proxy classes.
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*/
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public function __construct(EntityManager $em, $proxyDir, $proxyNs, $autoGenerate = false)
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{
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if ( ! $proxyDir) {
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throw ProxyException::proxyDirectoryRequired();
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}
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if ( ! $proxyNs) {
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throw ProxyException::proxyNamespaceRequired();
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}
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$this->_em = $em;
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$this->_proxyDir = $proxyDir;
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$this->_autoGenerate = $autoGenerate;
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$this->_proxyNamespace = $proxyNs;
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}
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/**
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* Gets a reference proxy instance for the entity of the given type and identified by
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* the given identifier.
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*
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* @param string $className
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* @param mixed $identifier
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* @return object
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*/
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public function getProxy($className, $identifier)
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{
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$fqn = ClassUtils::generateProxyClassName($className, $this->_proxyNamespace);
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if (! class_exists($fqn, false)) {
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$fileName = $this->getProxyFileName($className);
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if ($this->_autoGenerate) {
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$this->_generateProxyClass($this->_em->getClassMetadata($className), $fileName, self::$_proxyClassTemplate);
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}
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require $fileName;
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}
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if ( ! $this->_em->getMetadataFactory()->hasMetadataFor($fqn)) {
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$this->_em->getMetadataFactory()->setMetadataFor($fqn, $this->_em->getClassMetadata($className));
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}
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$entityPersister = $this->_em->getUnitOfWork()->getEntityPersister($className);
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return new $fqn($entityPersister, $identifier);
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}
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/**
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* Generate the Proxy file name
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*
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* @param string $className
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* @param string $baseDir Optional base directory for proxy file name generation.
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* If not specified, the directory configured on the Configuration of the
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* EntityManager will be used by this factory.
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* @return string
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*/
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private function getProxyFileName($className, $baseDir = null)
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{
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$proxyDir = $baseDir ?: $this->_proxyDir;
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return $proxyDir . DIRECTORY_SEPARATOR . '__CG__' . str_replace('\\', '', $className) . '.php';
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}
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/**
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* Generates proxy classes for all given classes.
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*
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* @param array $classes The classes (ClassMetadata instances) for which to generate proxies.
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* @param string $toDir The target directory of the proxy classes. If not specified, the
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* directory configured on the Configuration of the EntityManager used
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* by this factory is used.
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* @return int Number of generated proxies.
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*/
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public function generateProxyClasses(array $classes, $toDir = null)
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{
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$proxyDir = $toDir ?: $this->_proxyDir;
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$proxyDir = rtrim($proxyDir, DIRECTORY_SEPARATOR);
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$num = 0;
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foreach ($classes as $class) {
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/* @var $class ClassMetadata */
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if ($class->isMappedSuperclass || $class->reflClass->isAbstract()) {
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continue;
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}
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$proxyFileName = $this->getProxyFileName($class->name, $proxyDir);
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$this->_generateProxyClass($class, $proxyFileName, self::$_proxyClassTemplate);
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$num++;
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}
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return $num;
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}
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/**
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* Generates a proxy class file.
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*
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* @param $class
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* @param $proxyClassName
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* @param $file The path of the file to write to.
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*/
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private function _generateProxyClass($class, $fileName, $file)
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{
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$methods = $this->_generateMethods($class);
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$sleepImpl = $this->_generateSleep($class);
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$cloneImpl = $class->reflClass->hasMethod('__clone') ? 'parent::__clone();' : ''; // hasMethod() checks case-insensitive
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$placeholders = array(
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'<namespace>',
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'<proxyClassName>', '<className>',
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'<methods>', '<sleepImpl>', '<cloneImpl>'
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);
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$className = ltrim($class->name, '\\');
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$proxyClassName = ClassUtils::generateProxyClassName($class->name, $this->_proxyNamespace);
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$parts = explode('\\', strrev($proxyClassName), 2);
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$proxyClassNamespace = strrev($parts[1]);
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$proxyClassName = strrev($parts[0]);
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$replacements = array(
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$proxyClassNamespace,
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$proxyClassName,
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$className,
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$methods,
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$sleepImpl,
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$cloneImpl
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);
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$file = str_replace($placeholders, $replacements, $file);
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$parentDirectory = dirname($fileName);
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if ( ! is_dir($parentDirectory)) {
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if (false === @mkdir($parentDirectory, 0775, true)) {
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throw ProxyException::proxyDirectoryNotWritable();
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}
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} else if ( ! is_writable($parentDirectory)) {
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throw ProxyException::proxyDirectoryNotWritable();
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}
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$tmpFileName = $fileName . '.' . uniqid("", true);
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file_put_contents($tmpFileName, $file);
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rename($tmpFileName, $fileName);
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}
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/**
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* Generates the methods of a proxy class.
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*
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* @param ClassMetadata $class
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* @return string The code of the generated methods.
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*/
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private function _generateMethods(ClassMetadata $class)
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{
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$methods = '';
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$methodNames = array();
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foreach ($class->reflClass->getMethods() as $method) {
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/* @var $method ReflectionMethod */
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if ($method->isConstructor() || in_array(strtolower($method->getName()), array("__sleep", "__clone")) || isset($methodNames[$method->getName()])) {
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continue;
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}
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$methodNames[$method->getName()] = true;
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if ($method->isPublic() && ! $method->isFinal() && ! $method->isStatic()) {
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$methods .= "\n" . ' public function ';
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if ($method->returnsReference()) {
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$methods .= '&';
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}
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$methods .= $method->getName() . '(';
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$firstParam = true;
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$parameterString = $argumentString = '';
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foreach ($method->getParameters() as $param) {
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if ($firstParam) {
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$firstParam = false;
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} else {
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$parameterString .= ', ';
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$argumentString .= ', ';
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}
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// We need to pick the type hint class too
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if (($paramClass = $param->getClass()) !== null) {
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$parameterString .= '\\' . $paramClass->getName() . ' ';
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} else if ($param->isArray()) {
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$parameterString .= 'array ';
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}
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if ($param->isPassedByReference()) {
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$parameterString .= '&';
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}
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$parameterString .= '$' . $param->getName();
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$argumentString .= '$' . $param->getName();
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if ($param->isDefaultValueAvailable()) {
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$parameterString .= ' = ' . var_export($param->getDefaultValue(), true);
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}
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}
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$methods .= $parameterString . ')';
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$methods .= "\n" . ' {' . "\n";
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if ($this->isShortIdentifierGetter($method, $class)) {
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$identifier = lcfirst(substr($method->getName(), 3));
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$cast = in_array($class->fieldMappings[$identifier]['type'], array('integer', 'smallint')) ? '(int) ' : '';
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$methods .= ' if ($this->__isInitialized__ === false) {' . "\n";
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$methods .= ' return ' . $cast . '$this->_identifier["' . $identifier . '"];' . "\n";
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$methods .= ' }' . "\n";
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}
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$methods .= ' $this->__load();' . "\n";
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$methods .= ' return parent::' . $method->getName() . '(' . $argumentString . ');';
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$methods .= "\n" . ' }' . "\n";
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}
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}
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return $methods;
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}
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/**
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* Check if the method is a short identifier getter.
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*
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* What does this mean? For proxy objects the identifier is already known,
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* however accessing the getter for this identifier usually triggers the
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* lazy loading, leading to a query that may not be necessary if only the
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* ID is interesting for the userland code (for example in views that
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* generate links to the entity, but do not display anything else).
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*
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* @param ReflectionMethod $method
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* @param ClassMetadata $class
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* @return bool
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*/
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private function isShortIdentifierGetter($method, $class)
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{
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$identifier = lcfirst(substr($method->getName(), 3));
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$cheapCheck = (
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$method->getNumberOfParameters() == 0 &&
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substr($method->getName(), 0, 3) == "get" &&
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in_array($identifier, $class->identifier, true) &&
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$class->hasField($identifier) &&
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(($method->getEndLine() - $method->getStartLine()) <= 4)
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&& in_array($class->fieldMappings[$identifier]['type'], array('integer', 'bigint', 'smallint', 'string'))
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);
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if ($cheapCheck) {
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$code = file($method->getDeclaringClass()->getFileName());
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$code = trim(implode(" ", array_slice($code, $method->getStartLine() - 1, $method->getEndLine() - $method->getStartLine() + 1)));
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$pattern = sprintf(self::PATTERN_MATCH_ID_METHOD, $method->getName(), $identifier);
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if (preg_match($pattern, $code)) {
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return true;
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}
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}
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return false;
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}
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/**
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* Generates the code for the __sleep method for a proxy class.
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*
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* @param $class
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* @return string
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*/
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private function _generateSleep(ClassMetadata $class)
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{
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$sleepImpl = '';
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if ($class->reflClass->hasMethod('__sleep')) {
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$sleepImpl .= "return array_merge(array('__isInitialized__'), parent::__sleep());";
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} else {
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$sleepImpl .= "return array('__isInitialized__', ";
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$first = true;
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foreach ($class->getReflectionProperties() as $name => $prop) {
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if ($first) {
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$first = false;
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} else {
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$sleepImpl .= ', ';
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}
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$sleepImpl .= "'" . $name . "'";
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}
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$sleepImpl .= ');';
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}
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return $sleepImpl;
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}
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/** Proxy class code template */
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private static $_proxyClassTemplate =
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'<?php
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namespace <namespace>;
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/**
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* THIS CLASS WAS GENERATED BY THE DOCTRINE ORM. DO NOT EDIT THIS FILE.
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*/
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class <proxyClassName> extends \<className> implements \Doctrine\ORM\Proxy\Proxy
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{
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private $_entityPersister;
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private $_identifier;
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public $__isInitialized__ = false;
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public function __construct($entityPersister, $identifier)
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{
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$this->_entityPersister = $entityPersister;
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$this->_identifier = $identifier;
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}
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/** @private */
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public function __load()
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{
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if (!$this->__isInitialized__ && $this->_entityPersister) {
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$this->__isInitialized__ = true;
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if (method_exists($this, "__wakeup")) {
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// call this after __isInitialized__to avoid infinite recursion
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// but before loading to emulate what ClassMetadata::newInstance()
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// provides.
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$this->__wakeup();
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}
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if ($this->_entityPersister->load($this->_identifier, $this) === null) {
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throw new \Doctrine\ORM\EntityNotFoundException();
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}
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unset($this->_entityPersister, $this->_identifier);
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}
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}
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/** @private */
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public function __isInitialized()
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{
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return $this->__isInitialized__;
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}
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<methods>
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public function __sleep()
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{
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<sleepImpl>
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}
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public function __clone()
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{
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if (!$this->__isInitialized__ && $this->_entityPersister) {
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$this->__isInitialized__ = true;
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$class = $this->_entityPersister->getClassMetadata();
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$original = $this->_entityPersister->load($this->_identifier);
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if ($original === null) {
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throw new \Doctrine\ORM\EntityNotFoundException();
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}
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foreach ($class->reflFields AS $field => $reflProperty) {
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$reflProperty->setValue($this, $reflProperty->getValue($original));
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}
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unset($this->_entityPersister, $this->_identifier);
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}
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<cloneImpl>
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}
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}';
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}
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