testing

DiffusionDiffQuery.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 DiffusionDiffQuery extends DiffusionQuery {

			protected $renderingReference;

			final public static function newFromDiffusionRequest(
			DiffusionRequest $request) {
			return parent::newQueryObject(__CLASS__, $request);
			}

			final public function getRenderingReference() {
			return $this->renderingReference;
			}

			final public function loadChangeset() {
			return $this->executeQuery();
			}

			protected function getEffectiveCommit() {
			$drequest = $this->getRequest();

			$modified_query = DiffusionLastModifiedQuery::newFromDiffusionRequest(
			$drequest);
			list($commit) = $modified_query->loadLastModification();
			if (!$commit) {
			// TODO: Improve error messages here.
			return null;
			}
			return $commit->getCommitIdentifier();
			}

			}