class_GzipCompressor.php

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<?php
class GzipCompressor extends BaseFrameworkSystem implements Compressor {
        protected function __construct () {
                // Call parent constructor!
                parent::__construct(__CLASS__);
        }

        public final static function createGzipCompressor () {
                // Get new instance
                if ((function_exists('gzcompress')) && (function_exists('gzuncompress'))) {
                        // Compressor can maybe be used
                        $cInstance = new GzipCompressor();
                } else {
                        // Routines not found!
                        $cInstance = null;
                }

                // Return the compressor instance
                return $cInstance;
        }

        public function compressStream ($streamData) {
                if (is_object($streamData)) {
                        // Throw an exception
                        throw new InvalidObjectException($streamData, self::EXCEPTION_UNEXPECTED_OBJECT);
                }

                // Return the compressed stream
                return gzcompress($streamData, 1);
        }

        public function decompressStream ($streamData) {
                if (is_object($streamData)) {
                        // Throw an exception
                        throw new InvalidObjectException($streamData, self::EXCEPTION_UNEXPECTED_OBJECT);
                }

                // Return the decompressed stream
                return gzuncompress($streamData);
        }

        public final function getCompressorExtension () {
                return "gz";
        }
}

// [EOF]
?>