testing

PhabricatorFactEngine.php
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			<?php

			/*
			* Copyright 2012 Facebook, Inc.
			*
			* Licensed under the Apache License, Version 2.0 (the "License");
			* you may not use this file except in compliance with the License.
			* You may obtain a copy of the License at
			*
			* http://www.apache.org/licenses/LICENSE-2.0
			*
			* Unless required by applicable law or agreed to in writing, software
			* distributed under the License is distributed on an "AS IS" BASIS,
			* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
			* See the License for the specific language governing permissions and
			* limitations under the License.
			*/

			abstract class PhabricatorFactEngine {

			final public static function loadAllEngines() {
			$classes = id(new PhutilSymbolLoader())
			->setAncestorClass(__CLASS__)
			->setConcreteOnly(true)
			->selectAndLoadSymbols();

			$objects = array();
			foreach ($classes as $class) {
			$objects[] = newv($class['name'], array());
			}

			return $objects;
			}

			public function shouldComputeRawFactsForObject(PhabricatorLiskDAO $object) {
			return false;
			}

			public function computeRawFactsForObject(PhabricatorLiskDAO $object) {
			return array();
			}

			public function shouldComputeAggregateFacts() {
			return false;
			}

			public function computeAggregateFacts() {
			return array();
			}

			}