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<?php |
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namespace Mattbit\Flat; |
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use Mattbit\Flat\Query\Parser; |
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use Mattbit\Flat\Storage\DocumentStore; |
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use Mattbit\Flat\Storage\EngineInterface; |
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use Mattbit\Flat\Query\Expression\Factory; |
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class Database |
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{ |
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/** |
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* The storage engine. |
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* |
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* @var EngineInterface |
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*/ |
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protected $engine; |
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/** |
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* @var Parser |
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*/ |
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protected $parser; |
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/** |
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* An array of the registered collections. |
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* |
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* @var array |
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*/ |
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protected $collections; |
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public function __construct(EngineInterface $engine) |
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{ |
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$this->engine = $engine; |
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$this->initializeParser(); |
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} |
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/** |
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* Select an existing collection or create a new one. |
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* |
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* @param string $name |
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* |
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* @return Collection |
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*/ |
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public function collection($name) |
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{ |
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return $this->getOrCreateCollection($name); |
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} |
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public function getOrCreateCollection($name) |
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{ |
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if (isset($this->collections[$name])) { |
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return $this->collections[$name]; |
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} |
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return $this->createCollection($name); |
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} |
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public function createCollection($name) |
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{ |
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$this->engine->init($name); |
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$store = new DocumentStore($this->engine, $name); |
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return $this->collections[$name] = $this->newCollection($store, $name); |
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} |
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public function dropCollection($name) |
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{ |
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$this->engine->destroy($name); |
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unset($this->collections[$name]); |
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return true; |
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} |
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public function getParser() |
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{ |
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return $this->parser; |
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} |
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protected function initializeParser() |
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{ |
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$factory = new Factory(); |
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$this->parser = new Parser($factory); |
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} |
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protected function newCollection(DocumentStore $store, $name) |
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{ |
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return new Collection($this, $store, $name); |
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} |
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} |
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mattbit /
flat
