class_CompressorChannel.php

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<?php
class CompressorChannel extends BaseMiddleware implements Registerable {
        private $compressor = null;

        protected function __construct () {
                // Call parent constructor!
                parent::__construct(__CLASS__);
        }

        public final static function createCompressorChannel ($baseDir) {
                // Get new instance
                $cInstance = new CompressorChannel();

                // Is the compressor handler set?
                if (
                           (is_null($cInstance->getCompressor()))
                        || (!is_object($cInstance->getCompressor()))
                        || (!method_exists($cInstance->getCompressor(), 'compressStream'))
                        || (!method_exists($cInstance->getCompressor(), 'decompressStream'))
                ) {
                        // Get a directory pointer
                        $dirPointer = FrameworkDirectoryPointer::createFrameworkDirectoryPointer($baseDir);

                        // Read all directories but no sub directories
                        while ($dir = $dirPointer->readDirectoryExcept(array("..", ".", ".htaccess", ".svn"))) {
                                // Is this a class file?
                                if ((substr($dir, 0, 6) == "class_") && (substr($dir, -4, 4) == ".php")) {
                                        // Get the compressor's name. That's why you must name
                                        // your files like your classes and also that's why you
                                        // must keep on class in one file.
                                        $className = substr($dir, 6, -4);

                                        // Get an instance from our object factory
                                        $tempInstance = ObjectFactory::createObjectByName($className);

                                        // Set the compressor
                                        $cInstance->setCompressor($tempInstance);

                                        // No more searches required because we have found a valid compressor stream
                                        break;
                                } // END - if
                        } // END - while

                        // Close the directory
                        $dirPointer->closeDirectory();
                } // END - if

                // Check again if there is a compressor
                if (
                           (is_null($cInstance->getCompressor()))
                        || (!is_object($cInstance->getCompressor()))
                        || (!method_exists($cInstance->getCompressor(), 'compressStream'))
                        || (!method_exists($cInstance->getCompressor(), 'decompressStream'))
                ) {
                        // Set the null compressor handler. This should not be configureable!
                        $cInstance->setCompressor(ObjectFactory::createObjectByName('NullCompressor'));
                } // END - if

                // Return the compressor instance
                return $cInstance;
        }

        public final function getCompressor () {
                return $this->compressor;
        }

        public final function setCompressor (Compressor $compressorInstance) {
                $this->compressor = $compressorInstance;
        }

        public final function getCompressorExtension () {
                // Get compressor extension from current compressor
                return $this->getCompressor()->getCompressorExtension();
        }
}

// [EOF]
?>