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<?php
/*
* This file is part of the symfony framework.
*
* (c) Fabien Potencier <fabien.potencier@symfony-project.com>
*
* This source file is subject to the MIT license that is bundled
* with this source code in the file LICENSE.
*/
/**
* RokCommon_Service_Container_Builder is a DI container that provides an interface to build the services.
*
* @package symfony
* @subpackage dependency_injection
* @author Fabien Potencier <fabien.potencier@symfony-project.com>
* @version SVN: $Id: Builder.php 10831 2013-05-29 19:32:17Z btowles $
*/
class RokCommon_Service_Container_Builder extends RokCommon_Service_ContainerImpl
{
protected
$definitions = array(),
$aliases = array(),
$loading = array();
/**
* Sets a service.
*
* @param string $id The service identifier
* @param object $service The service instance
*/
public function setService($id, $service)
{
unset($this->aliases[$id]);
parent::setService($id, $service);
}
/**
* Returns true if the given service is defined.
*
* @param string $id The service identifier
*
* @return Boolean true if the service is defined, false otherwise
*/
public function hasService($id)
{
return isset($this->definitions[$id]) || isset($this->aliases[$id]) || parent::hasService($id);
}
/**
* Gets a service.
*
* @param string $id The service identifier
*
* @return object The associated service
*
* @throw InvalidArgumentException if the service is not defined
* @throw LogicException if the service has a circular reference to itself
*/
public function getService($id)
{
try
{
return parent::getService($id);
}
catch (InvalidArgumentException $e)
{
if (isset($this->loading[$id]))
{
throw new LogicException(sprintf('The service "%s" has a circular reference to itself.', $id));
}
if (!$this->hasServiceDefinition($id) && isset($this->aliases[$id]))
{
return $this->getService($this->aliases[$id]);
}
$definition = $this->getServiceDefinition($id);
$this->loading[$id] = true;
if ($definition->isShared())
{
$service = $this->services[$id] = $this->createService($definition);
}
else
{
$service = $this->createService($definition);
}
unset($this->loading[$id]);
return $service;
}
}
/**
* Gets all service ids.
*
* @return array An array of all defined service ids
*/
public function getServiceIds()
{
return array_unique(array_merge(array_keys($this->getServiceDefinitions()), array_keys($this->aliases), parent::getServiceIds()));
}
/**
* Sets an alias for an existing service.
*
* @param string $alias The alias to create
* @param string $id The service to alias
*/
public function setAlias($alias, $id)
{
$this->aliases[$alias] = $id;
}
/**
* Gets all defined aliases.
*
* @return array An array of aliases
*/
public function getAliases()
{
return $this->aliases;
}
/**
* Registers a service definition.
*
* This methods allows for simple registration of service definition
* with a fluid interface.
*
* @param string $id The service identifier
* @param string $class The service class
*
* @return RokCommon_Service_Definition A RokCommon_Service_Definition instance
*/
public function register($id, $class)
{
return $this->setServiceDefinition($id, new RokCommon_Service_Definition($class));
}
/**
* Adds the service definitions.
*
* @param array $definitions An array of service definitions
*/
public function addServiceDefinitions(array $definitions)
{
foreach ($definitions as $id => $definition)
{
$this->setServiceDefinition($id, $definition);
}
}
/**
* Sets the service definitions.
*
* @param array $definitions An array of service definitions
*/
public function setServiceDefinitions(array $definitions)
{
$this->definitions = array();
$this->addServiceDefinitions($definitions);
}
/**
* Gets all service definitions.
*
* @return array An array of RokCommon_Service_Definition instances
*/
public function getServiceDefinitions()
{
return $this->definitions;
}
/**
* Sets a service definition.
*
* @param string $id The service identifier
* @param RokCommon_Service_Definition $definition A RokCommon_Service_Definition instance
*/
public function setServiceDefinition($id, RokCommon_Service_Definition $definition)
{
unset($this->aliases[$id]);
return $this->definitions[$id] = $definition;
}
/**
* Returns true if a service definition exists under the given identifier.
*
* @param string $id The service identifier
*
* @return Boolean true if the service definition exists, false otherwise
*/
public function hasServiceDefinition($id)
{
return array_key_exists($id, $this->definitions);
}
/**
* Gets a service definition.
*
* @param string $id The service identifier
*
* @return RokCommon_Service_Definition A RokCommon_Service_Definition instance
*
* @throw InvalidArgumentException if the service definition does not exist
*/
public function getServiceDefinition($id)
{
if (!$this->hasServiceDefinition($id))
{
throw new InvalidArgumentException(sprintf('The service definition "%s" does not exist.', $id));
}
return $this->definitions[$id];
}
/**
* Creates a service for a service definition.
*
* @param RokCommon_Service_Definition $definition A service definition instance
*
* @return object The service described by the service definition
*/
protected function createService(RokCommon_Service_Definition $definition)
{
if (null !== $definition->getFile())
{
require_once $this->resolveValue($definition->getFile());
}
$r = new ReflectionClass($this->resolveValue($definition->getClass()));
$arguments = $this->resolveServices($this->resolveValue($definition->getArguments()));
if (null !== $definition->getConstructor())
{
$service = call_user_func_array(array($this->resolveValue($definition->getClass()), $definition->getConstructor()), $arguments);
}
else
{
$service = null === $r->getConstructor() ? $r->newInstance() : $r->newInstanceArgs($arguments);
}
foreach ($definition->getMethodCalls() as $call)
{
call_user_func_array(array($service, $call[0]), $this->resolveServices($this->resolveValue($call[1])));
}
if ($callable = $definition->getConfigurator())
{
if (is_array($callable) && is_object($callable[0]) && $callable[0] instanceof RokCommon_Service_Reference)
{
$callable[0] = $this->getService((string) $callable[0]);
}
elseif (is_array($callable))
{
$callable[0] = $this->resolveValue($callable[0]);
}
if (!is_callable($callable))
{
throw new InvalidArgumentException(sprintf('The configure callable for class "%s" is not a callable.', get_class($service)));
}
call_user_func($callable, $service);
}
return $service;
}
/**
* Replaces service references by the real service instance.
*
* @param mixed $value A value
*
* @return mixed The same value with all service references replaced by the real service instances
*/
public function resolveServices($value)
{
if (is_array($value))
{
$value = array_map(array($this, 'resolveServices'), $value);
}
else if (is_object($value) && $value instanceof RokCommon_Service_Reference)
{
$value = $this->getService((string) $value);
}
return $value;
}
}