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<?php |
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/** |
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##DOC-SIGNATURE## |
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This file is part of WideImage. |
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WideImage is free software; you can redistribute it and/or modify |
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it under the terms of the GNU Lesser General Public License as published by |
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the Free Software Foundation; either version 2.1 of the License, or |
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(at your option) any later version. |
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WideImage is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU Lesser General Public License for more details. |
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You should have received a copy of the GNU Lesser General Public License |
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along with WideImage; if not, write to the Free Software |
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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* @package Internals |
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**/ |
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namespace WideImage; |
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use WideImage\Operation; |
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use WideImage\Exception\UnknownImageOperationException; |
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/** |
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* Operation factory |
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* |
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* @package Internals |
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**/ |
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class OperationFactory |
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{ |
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protected static $cache = array(); |
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public static function get($operationName) |
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{ |
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$lcname = strtolower($operationName); |
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if (!isset(self::$cache[$lcname])) { |
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$opClassName = "\\WideImage\\Operation\\" . ucfirst($operationName); |
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// why not use autoloading? |
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// if (!class_exists($opClassName, false)) { |
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if (!class_exists($opClassName)) { |
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throw new UnknownImageOperationException("Can't load '{$operationName}' operation."); |
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} |
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self::$cache[$lcname] = new $opClassName(); |
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} |
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return self::$cache[$lcname]; |
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} |
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} |
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Our type inference engine in quite powerful, but sometimes the code does not provide enough clues to go by. In these cases we request you to add a
@returnannotation as described here.