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<?php namespace EasyRdf\Literal; /** * EasyRdf * * LICENSE * * Copyright (c) 2009-2020 Nicholas J Humfrey. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. The name of the author 'Nicholas J Humfrey" may be used to endorse or * promote products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * @package EasyRdf * @copyright Copyright (c) 2009-2020 Nicholas J Humfrey * @license https://www.opensource.org/licenses/bsd-license.php */ use EasyRdf\Literal; /** * Class that represents an RDF Literal of datatype xsd:hexBinary * * @package EasyRdf * @link http://www.w3.org/TR/xmlschema-2/#hexBinary * @copyright Copyright (c) 2009-2020 Nicholas J Humfrey * @license https://www.opensource.org/licenses/bsd-license.php */ class HexBinary extends Literal { /** Constructor for creating a new xsd:hexBinary literal * * @param mixed $value The value of the literal (already encoded as hexadecimal) * @param string $lang Should be null (literals with a datatype can't have a language) * @param string $datatype Optional datatype (default 'xsd:hexBinary') * * @throws \InvalidArgumentException */ public function __construct($value, $lang = null, $datatype = null) { // Normalise the canonical representation, as specified here: // http://www.w3.org/TR/xmlschema-2/#hexBinary-canonical-repr $value = strtoupper($value); // Validate the data if (preg_match('/[^A-F0-9]/', $value)) { throw new \InvalidArgumentException( "Literal of type xsd:hexBinary contains non-hexadecimal characters" ); } parent::__construct(strtoupper($value), null, 'xsd:hexBinary'); } /** Constructor for creating a new literal object from a binary blob * * @param string $binary The binary data * * @return self */ public static function fromBinary($binary) { return new self(bin2hex($binary)); } /** Decode the hexadecimal string into a binary blob * * @return string The binary blob */ public function toBinary() { return pack("H*", $this->value); } }
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