8 * Copyright (c) 2009-2013 Nicholas J Humfrey. All rights reserved.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright notice,
15 * this list of conditions and the following disclaimer in the documentation
16 * and/or other materials provided with the distribution.
17 * 3. The name of the author 'Nicholas J Humfrey" may be used to endorse or
18 * promote products derived from this software without specific prior
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
34 * @copyright Copyright (c) 2009-2013 Nicholas J Humfrey
35 * @license http://www.opensource.org/licenses/bsd-license.php
39 * Class that represents an RDF Literal of datatype xsd:hexBinary
42 * @link http://www.w3.org/TR/xmlschema-2/#hexBinary
43 * @copyright Copyright (c) 2009-2013 Nicholas J Humfrey
44 * @license http://www.opensource.org/licenses/bsd-license.php
46 class EasyRdf_Literal_HexBinary extends EasyRdf_Literal
48 /** Constructor for creating a new xsd:hexBinary literal
50 * @param mixed $value The value of the literal (already encoded as hexadecimal)
51 * @param string $lang Should be null (literals with a datatype can't have a language)
52 * @param string $datatype Optional datatype (default 'xsd:hexBinary')
53 * @return object EasyRdf_Literal_HexBinary
55 public function __construct($value, $lang = null, $datatype = null)
57 // Normalise the canonical representation, as specified here:
58 // http://www.w3.org/TR/xmlschema-2/#hexBinary-canonical-repr
59 $value = strtoupper($value);
62 if (preg_match('/[^A-F0-9]/', $value)) {
63 throw new InvalidArgumentException(
64 "Literal of type xsd:hexBinary contains non-hexadecimal characters"
68 parent::__construct(strtoupper($value), null, 'xsd:hexBinary');
71 /** Constructor for creating a new literal object from a binary blob
73 * @param string $binary The binary data
74 * @return object EasyRdf_Literal_HexBinary
76 public static function fromBinary($binary)
78 return new self( bin2hex($binary) );
81 /** Decode the hexadecimal string into a binary blob
83 * @return string The binary blob
85 public function toBinary()
87 return pack("H*", $this->value);