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CelerityPhysicalResources.php
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			<?php

			/**
			* Defines the location of physical static resources which exist at build time
			* and are precomputed into a resource map.
			*/
			abstract class CelerityPhysicalResources extends CelerityResources {

			private $map;

			abstract public function getPathToMap();
			abstract public function findBinaryResources();
			abstract public function findTextResources();

			public function loadMap() {
			if ($this->map === null) {
			$this->map = include $this->getPathToMap();
			}
			return $this->map;
			}

			public static function getAll() {
			static $resources_map;

			if ($resources_map === null) {
			$resources_list = id(new PhutilClassMapQuery())
			->setAncestorClass(__CLASS__)
			->setUniqueMethod('getName')
			->execute();

			foreach ($resources_list as $resources) {
			$name = $resources->getName();

			if (!preg_match('/^[a-z0-9]+/', $name)) {
			throw new Exception(
			pht(
			'Resources name "%s" is not valid; it must contain only '.
			'lowercase latin letters and digits.',
			$name));
			}
			}

			$resources_map = $resources_list;
			}

			return $resources_map;
			}

			}