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[yaffs-website] / vendor / easyrdf / easyrdf / lib / EasyRdf / Serialiser / Rapper.php

diff --git a/vendor/easyrdf/easyrdf/lib/EasyRdf/Serialiser/Rapper.php b/vendor/easyrdf/easyrdf/lib/EasyRdf/Serialiser/Rapper.php
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+<?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 to serialise an EasyRdf_Graph to RDF
+ * using the 'rapper' command line tool.
+ *
+ * Note: the built-in N-Triples serialiser is used to pass data to Rapper.
+ *
+ * @package    EasyRdf
+ * @copyright  Copyright (c) 2009-2013 Nicholas J Humfrey
+ * @license    http://www.opensource.org/licenses/bsd-license.php
+ */
+class EasyRdf_Serialiser_Rapper extends EasyRdf_Serialiser_Ntriples
+{
+    private $rapperCmd = null;
+
+    /**
+     * Constructor
+     *
+     * @param string $rapperCmd Optional path to the rapper command to use.
+     * @return object EasyRdf_Serialiser_Rapper
+     */
+    public function __construct($rapperCmd = 'rapper')
+    {
+        $result = exec("$rapperCmd --version 2>/dev/null", $output, $status);
+        if ($status != 0) {
+            throw new EasyRdf_Exception(
+                "Failed to execute the command '$rapperCmd': $result"
+            );
+        } else {
+            $this->rapperCmd = $rapperCmd;
+        }
+    }
+
+    /**
+     * Serialise an EasyRdf_Graph to the RDF format of choice.
+     *
+     * @param EasyRdf_Graph $graph   An EasyRdf_Graph object.
+     * @param string        $format  The name of the format to convert to.
+     * @param array         $options
+     * @return string The RDF in the new desired format.
+     */
+    public function serialise($graph, $format, array $options = array())
+    {
+        parent::checkSerialiseParams($graph, $format);
+
+        $ntriples = parent::serialise($graph, 'ntriples');
+
+        // Hack to produce more concise RDF/XML
+        if ($format == 'rdfxml') {
+            $format = 'rdfxml-abbrev';
+        }
+
+        return EasyRdf_Utils::execCommandPipe(
+            $this->rapperCmd,
+            array(
+                '--quiet',
+                '--input', 'ntriples',
+                '--output', $format,
+                '-', 'unknown://'
+            ),
+            $ntriples
+        );
+    }
+}