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doctrine2/lib/Doctrine/ORM/Proxy/ProxyFactory.php
2012-02-14 19:12:20 +01:00

402 lines
14 KiB
PHP

<?php
/*
* 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.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the LGPL. For more information, see
* <http://www.doctrine-project.org>.
*/
namespace Doctrine\ORM\Proxy;
use Doctrine\ORM\EntityManager,
Doctrine\ORM\Mapping\ClassMetadata,
Doctrine\ORM\Mapping\AssociationMapping,
Doctrine\Common\Util\ClassUtils;
/**
* This factory is used to create proxy objects for entities at runtime.
*
* @author Roman Borschel <roman@code-factory.org>
* @author Giorgio Sironi <piccoloprincipeazzurro@gmail.com>
* @since 2.0
*/
class ProxyFactory
{
/** The EntityManager this factory is bound to. */
private $_em;
/** Whether to automatically (re)generate proxy classes. */
private $_autoGenerate;
/** The namespace that contains all proxy classes. */
private $_proxyNamespace;
/** The directory that contains all proxy classes. */
private $_proxyDir;
/**
* Used to match very simple id methods that don't need
* to be proxied since the identifier is known.
*
* @var string
*/
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';
/**
* Initializes a new instance of the <tt>ProxyFactory</tt> class that is
* connected to the given <tt>EntityManager</tt>.
*
* @param EntityManager $em The EntityManager the new factory works for.
* @param string $proxyDir The directory to use for the proxy classes. It must exist.
* @param string $proxyNs The namespace to use for the proxy classes.
* @param boolean $autoGenerate Whether to automatically generate proxy classes.
*/
public function __construct(EntityManager $em, $proxyDir, $proxyNs, $autoGenerate = false)
{
if ( ! $proxyDir) {
throw ProxyException::proxyDirectoryRequired();
}
if ( ! $proxyNs) {
throw ProxyException::proxyNamespaceRequired();
}
$this->_em = $em;
$this->_proxyDir = $proxyDir;
$this->_autoGenerate = $autoGenerate;
$this->_proxyNamespace = $proxyNs;
}
/**
* Gets a reference proxy instance for the entity of the given type and identified by
* the given identifier.
*
* @param string $className
* @param mixed $identifier
* @return object
*/
public function getProxy($className, $identifier)
{
$fqn = ClassUtils::generateProxyClassName($className, $this->_proxyNamespace);
if (! class_exists($fqn, false)) {
$fileName = $this->getProxyFileName($className);
if ($this->_autoGenerate) {
$this->_generateProxyClass($this->_em->getClassMetadata($className), $fileName, self::$_proxyClassTemplate);
}
require $fileName;
}
if ( ! $this->_em->getMetadataFactory()->hasMetadataFor($fqn)) {
$this->_em->getMetadataFactory()->setMetadataFor($fqn, $this->_em->getClassMetadata($className));
}
$entityPersister = $this->_em->getUnitOfWork()->getEntityPersister($className);
return new $fqn($entityPersister, $identifier);
}
/**
* Generate the Proxy file name
*
* @param string $className
* @return string
*/
private function getProxyFileName($className)
{
return $this->_proxyDir . DIRECTORY_SEPARATOR . '__CG__' . str_replace('\\', '', $className) . '.php';
}
/**
* Generates proxy classes for all given classes.
*
* @param array $classes The classes (ClassMetadata instances) for which to generate proxies.
* @param string $toDir The target directory of the proxy classes. If not specified, the
* directory configured on the Configuration of the EntityManager used
* by this factory is used.
*/
public function generateProxyClasses(array $classes, $toDir = null)
{
$proxyDir = $toDir ?: $this->_proxyDir;
$proxyDir = rtrim($proxyDir, DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR;
foreach ($classes as $class) {
/* @var $class ClassMetadata */
if ($class->isMappedSuperclass) {
continue;
}
$proxyFileName = $this->getProxyFileName($class->name);
$this->_generateProxyClass($class, $proxyFileName, self::$_proxyClassTemplate);
}
}
/**
* Generates a proxy class file.
*
* @param ClassMetadata $class Metadata for the original class
* @param string $fileName Filename (full path) for the generated class
* @param string $file The proxy class template data
*/
private function _generateProxyClass(ClassMetadata $class, $fileName, $file)
{
$methods = $this->_generateMethods($class);
$sleepImpl = $this->_generateSleep($class);
$cloneImpl = $class->reflClass->hasMethod('__clone') ? 'parent::__clone();' : ''; // hasMethod() checks case-insensitive
$placeholders = array(
'<namespace>',
'<proxyClassName>', '<className>',
'<methods>', '<sleepImpl>', '<cloneImpl>'
);
$className = ltrim($class->name, '\\');
$proxyClassName = ClassUtils::generateProxyClassName($class->name, $this->_proxyNamespace);
$parts = explode('\\', strrev($proxyClassName), 2);
$proxyClassNamespace = strrev($parts[1]);
$proxyClassName = strrev($parts[0]);
$replacements = array(
$proxyClassNamespace,
$proxyClassName,
$className,
$methods,
$sleepImpl,
$cloneImpl
);
$file = str_replace($placeholders, $replacements, $file);
$parentDirectory = dirname($fileName);
if ( ! is_dir($parentDirectory)) {
if (false === @mkdir($parentDirectory, 0775, true)) {
throw ProxyException::proxyDirectoryNotWritable();
}
} else if ( ! is_writable($parentDirectory)) {
throw ProxyException::proxyDirectoryNotWritable();
}
file_put_contents($fileName, $file, LOCK_EX);
}
/**
* Generates the methods of a proxy class.
*
* @param ClassMetadata $class
* @return string The code of the generated methods.
*/
private function _generateMethods(ClassMetadata $class)
{
$methods = '';
$methodNames = array();
foreach ($class->reflClass->getMethods() as $method) {
/* @var $method ReflectionMethod */
if ($method->isConstructor() || in_array(strtolower($method->getName()), array("__sleep", "__clone")) || isset($methodNames[$method->getName()])) {
continue;
}
$methodNames[$method->getName()] = true;
if ($method->isPublic() && ! $method->isFinal() && ! $method->isStatic()) {
$methods .= "\n" . ' public function ';
if ($method->returnsReference()) {
$methods .= '&';
}
$methods .= $method->getName() . '(';
$firstParam = true;
$parameterString = $argumentString = '';
foreach ($method->getParameters() as $param) {
if ($firstParam) {
$firstParam = false;
} else {
$parameterString .= ', ';
$argumentString .= ', ';
}
// We need to pick the type hint class too
if (($paramClass = $param->getClass()) !== null) {
$parameterString .= '\\' . $paramClass->getName() . ' ';
} else if ($param->isArray()) {
$parameterString .= 'array ';
}
if ($param->isPassedByReference()) {
$parameterString .= '&';
}
$parameterString .= '$' . $param->getName();
$argumentString .= '$' . $param->getName();
if ($param->isDefaultValueAvailable()) {
$parameterString .= ' = ' . var_export($param->getDefaultValue(), true);
}
}
$methods .= $parameterString . ')';
$methods .= "\n" . ' {' . "\n";
if ($this->isShortIdentifierGetter($method, $class)) {
$identifier = lcfirst(substr($method->getName(), 3));
$cast = in_array($class->fieldMappings[$identifier]['type'], array('integer', 'smallint')) ? '(int) ' : '';
$methods .= ' if ($this->__isInitialized__ === false) {' . "\n";
$methods .= ' return ' . $cast . '$this->_identifier["' . $identifier . '"];' . "\n";
$methods .= ' }' . "\n";
}
$methods .= ' $this->__load();' . "\n";
$methods .= ' return parent::' . $method->getName() . '(' . $argumentString . ');';
$methods .= "\n" . ' }' . "\n";
}
}
return $methods;
}
/**
* Check if the method is a short identifier getter.
*
* What does this mean? For proxy objects the identifier is already known,
* however accessing the getter for this identifier usually triggers the
* lazy loading, leading to a query that may not be necessary if only the
* ID is interesting for the userland code (for example in views that
* generate links to the entity, but do not display anything else).
*
* @param ReflectionMethod $method
* @param ClassMetadata $class
* @return bool
*/
private function isShortIdentifierGetter($method, ClassMetadata $class)
{
$identifier = lcfirst(substr($method->getName(), 3));
$cheapCheck = (
$method->getNumberOfParameters() == 0 &&
substr($method->getName(), 0, 3) == "get" &&
in_array($identifier, $class->identifier, true) &&
$class->hasField($identifier) &&
(($method->getEndLine() - $method->getStartLine()) <= 4)
&& in_array($class->fieldMappings[$identifier]['type'], array('integer', 'bigint', 'smallint', 'string'))
);
if ($cheapCheck) {
$code = file($method->getDeclaringClass()->getFileName());
$code = trim(implode(" ", array_slice($code, $method->getStartLine() - 1, $method->getEndLine() - $method->getStartLine() + 1)));
$pattern = sprintf(self::PATTERN_MATCH_ID_METHOD, $method->getName(), $identifier);
if (preg_match($pattern, $code)) {
return true;
}
}
return false;
}
/**
* Generates the code for the __sleep method for a proxy class.
*
* @param $class
* @return string
*/
private function _generateSleep(ClassMetadata $class)
{
$sleepImpl = '';
if ($class->reflClass->hasMethod('__sleep')) {
$sleepImpl .= "return array_merge(array('__isInitialized__'), parent::__sleep());";
} else {
$sleepImpl .= "return array('__isInitialized__', ";
$first = true;
foreach ($class->getReflectionProperties() as $name => $prop) {
if ($first) {
$first = false;
} else {
$sleepImpl .= ', ';
}
$sleepImpl .= "'" . $name . "'";
}
$sleepImpl .= ');';
}
return $sleepImpl;
}
/** Proxy class code template */
private static $_proxyClassTemplate =
'<?php
namespace <namespace>;
/**
* THIS CLASS WAS GENERATED BY THE DOCTRINE ORM. DO NOT EDIT THIS FILE.
*/
class <proxyClassName> extends \<className> implements \Doctrine\ORM\Proxy\Proxy
{
private $_entityPersister;
private $_identifier;
public $__isInitialized__ = false;
public function __construct($entityPersister, $identifier)
{
$this->_entityPersister = $entityPersister;
$this->_identifier = $identifier;
}
/** @private */
public function __load()
{
if (!$this->__isInitialized__ && $this->_entityPersister) {
$this->__isInitialized__ = true;
if (method_exists($this, "__wakeup")) {
// call this after __isInitialized__to avoid infinite recursion
// but before loading to emulate what ClassMetadata::newInstance()
// provides.
$this->__wakeup();
}
if ($this->_entityPersister->load($this->_identifier, $this) === null) {
throw new \Doctrine\ORM\EntityNotFoundException();
}
unset($this->_entityPersister, $this->_identifier);
}
}
/** @private */
public function __isInitialized()
{
return $this->__isInitialized__;
}
<methods>
public function __sleep()
{
<sleepImpl>
}
public function __clone()
{
if (!$this->__isInitialized__ && $this->_entityPersister) {
$this->__isInitialized__ = true;
$class = $this->_entityPersister->getClassMetadata();
$original = $this->_entityPersister->load($this->_identifier);
if ($original === null) {
throw new \Doctrine\ORM\EntityNotFoundException();
}
foreach ($class->reflFields AS $field => $reflProperty) {
$reflProperty->setValue($this, $reflProperty->getValue($original));
}
unset($this->_entityPersister, $this->_identifier);
}
<cloneImpl>
}
}';
}