/**
* Initializes the repository instance.
*
* Initializes the repository instance based on a classes meta information.
*
* @param Arachnid $entityManager The entity manager.
* @param Meta\GraphElement $meta The classes meta information.
*/
public function __construct(Arachnid $entityManager, Meta\GraphElement $meta)
{
$this->entityManager = $entityManager;
$this->class = $meta->getName();
$this->meta = $meta;
}
/**
* Creates a proxy class for a graph element.
*
* This method will create a proxy class for an entity that extends the required class and implements
* LRezek\Arachnid\Proxy\Entity. This class will be generated and stored in the directory specified by the $proxyDir
* property of this class. This is done so that the object returned by a query seemingly matches the object type
* being queried for, while retaining its ID and other required information.
*
* @param GraphElement $meta The meta for the entity object being proxied.
* @return mixed An instance of the proxy class.
* @throws \LRezek\Arachnid\Exception If something goes wrong in file writing.
*/
private function createProxy(GraphElement $meta)
{
//Get the proxy class name, as well as the regular class name
$proxyClass = $meta->getProxyClass();
$className = $meta->getName();
//If the class already exists, just make an instance of it with the correct properties and return it.
if (class_exists($proxyClass, false)) {
return $this->newInstance($proxyClass);
}
//Create a target file for the class
$targetFile = "{$this->proxyDir}/{$proxyClass}.php";
//If the file doesn't exist
if ($this->debug || !file_exists($targetFile)) {
//Initialize functions
$functions = '';
$reflectionClass = new \ReflectionClass($className);
//Loop through entities public methods
foreach ($reflectionClass->getMethods(\ReflectionMethod::IS_PUBLIC) as $method) {
//If the method isn't a constructor, destructor, or final, add it to the methods via method proxy.
if (!$method->isConstructor() && !$method->isDestructor() && !$method->isFinal()) {
$functions .= $this->methodProxy($method, $meta);
}
}
//Get the properties and primary key.
$properties = $meta->getProperties();
$properties[] = $meta->getPrimaryKey();
//Filter out private properties
$properties = array_filter($properties, function ($property) {
return !$property->isPrivate();
});
//Create an array map by property name
$properties = array_map(function ($property) {
return $property->getName();
}, $properties);
//Create php code for properties.
$properties = var_export($properties, true);
//Create the actual class.
$content = <<<CONTENT
<?php
class {$proxyClass} extends {$className} implements LRezek\\Arachnid\\Proxy\\Entity
{
private \$neo4j_hydrated = array();
private \$neo4j_meta;
private \$neo4j_entity;
private \$neo4j_loadCallback;
function getEntity()
{
\$entity = new {$className};
foreach (\$this->neo4j_meta->getProperties() as \$prop)
{
\$prop->setValue(\$entity, \$prop->getValue(\$this));
}
\$prop = \$this->neo4j_meta->getPrimaryKey();
\$prop->setValue(\$entity, \$prop->getValue(\$this));
return \$entity;
}
{$functions}
function __addHydrated(\$name)
{
\$this->neo4j_hydrated[] = \$name;
}
function __setMeta(\$meta)
{
\$this->neo4j_meta = \$meta;
}
function __setEntity(\$entity)
{
\$this->neo4j_entity = \$entity;
}
function __getEntity()
{
return \$this->neo4j_entity;
}
function __setLoadCallback(\$loadCallback)
{
\$this->neo4j_loadCallback = \$loadCallback;
}
private function __load(\$name, \$propertyName)
{
//Already hydrated
if(in_array(\$propertyName, \$this->neo4j_hydrated))
{
return;
}
if(! \$this->neo4j_meta)
{
throw new \\LRezek\\Arachnid\\Exception('Proxy not fully initialized.');
}
\$property = \$this->neo4j_meta->findProperty(\$name);
if(strpos(\$name, 'set') === 0)
{
\$this->__addHydrated(\$propertyName);
return;
}
//Make property node
if(\$property->isStart() || \$property->isEnd())
{
\$loader = \$this->neo4j_loadCallback;
//Get the node
if(\$property->isStart())
{
\$node = \$this->neo4j_entity->getStartNode();
}
else
{
\$node = \$this->neo4j_entity->getEndNode();
}
\$node = \$loader(\$node);
//Set the property
\$property->setValue(\$this, \$node);
}
//Hydrate the property
\$this->__addHydrated(\$propertyName);
}
function __sleep()
{
return {$properties};
}
}
CONTENT;
//Make sure the proxy directory is an actual directory
if (!is_dir($this->proxyDir)) {
if (false === @mkdir($this->proxyDir, 0775, true)) {
throw new Exception('Proxy Dir is not writable.');
}
} else {
if (!is_writable($this->proxyDir)) {
throw new Exception('Proxy Dir is not writable.');
}
}
//Write the file
file_put_contents($targetFile, $content);
}
//Add file to class loader
require $targetFile;
//Return an instance of the proxy class
return $this->newInstance($proxyClass);
}