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 to serialise an EasyRdf_Graph to RDF
40 * using the 'rapper' command line tool.
42 * Note: the built-in N-Triples serialiser is used to pass data to Rapper.
45 * @copyright Copyright (c) 2009-2013 Nicholas J Humfrey
46 * @license http://www.opensource.org/licenses/bsd-license.php
48 class EasyRdf_Serialiser_Rapper extends EasyRdf_Serialiser_Ntriples
50 private $rapperCmd = null;
55 * @param string $rapperCmd Optional path to the rapper command to use.
56 * @return object EasyRdf_Serialiser_Rapper
58 public function __construct($rapperCmd = 'rapper')
60 $result = exec("$rapperCmd --version 2>/dev/null", $output, $status);
62 throw new EasyRdf_Exception(
63 "Failed to execute the command '$rapperCmd': $result"
66 $this->rapperCmd = $rapperCmd;
71 * Serialise an EasyRdf_Graph to the RDF format of choice.
73 * @param EasyRdf_Graph $graph An EasyRdf_Graph object.
74 * @param string $format The name of the format to convert to.
75 * @param array $options
76 * @return string The RDF in the new desired format.
78 public function serialise($graph, $format, array $options = array())
80 parent::checkSerialiseParams($graph, $format);
82 $ntriples = parent::serialise($graph, 'ntriples');
84 // Hack to produce more concise RDF/XML
85 if ($format == 'rdfxml') {
86 $format = 'rdfxml-abbrev';
89 return EasyRdf_Utils::execCommandPipe(
93 '--input', 'ntriples',