--- /dev/null
+<?php
+
+/**
+ * EasyRdf
+ *
+ * LICENSE
+ *
+ * Copyright (c) 2009-2013 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) 2009-2013 Nicholas J Humfrey
+ * @license http://www.opensource.org/licenses/bsd-license.php
+ */
+
+/**
+ * Class that represents an RDF Literal of datatype xsd:hexBinary
+ *
+ * @package EasyRdf
+ * @link http://www.w3.org/TR/xmlschema-2/#hexBinary
+ * @copyright Copyright (c) 2009-2013 Nicholas J Humfrey
+ * @license http://www.opensource.org/licenses/bsd-license.php
+ */
+class EasyRdf_Literal_HexBinary extends EasyRdf_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 $datatype Optional datatype (default 'xsd:hexBinary')
+ * @return object EasyRdf_Literal_HexBinary
+ */
+ public function __construct($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 $binary The binary data
+ * @return object EasyRdf_Literal_HexBinary
+ */
+ public static function fromBinary($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);
+ }
+}