102 lines
3.8 KiB
PHP
102 lines
3.8 KiB
PHP
<?php
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/**
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* EasyRdf
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*
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* LICENSE
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*
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* Copyright (c) 2009-2013 Nicholas J Humfrey. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author 'Nicholas J Humfrey" may be used to endorse or
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* promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* @package EasyRdf
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* @copyright Copyright (c) 2009-2013 Nicholas J Humfrey
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* @license http://www.opensource.org/licenses/bsd-license.php
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*/
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/**
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* Class to parse RDF using the 'rapper' command line tool.
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*
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* @package EasyRdf
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* @copyright Copyright (c) 2009-2013 Nicholas J Humfrey
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* @license http://www.opensource.org/licenses/bsd-license.php
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*/
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class EasyRdf_Parser_Rapper extends EasyRdf_Parser_Json
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{
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private $rapperCmd = null;
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const MINIMUM_RAPPER_VERSION = '1.4.17';
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/**
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* Constructor
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*
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* @param string $rapperCmd Optional path to the rapper command to use.
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* @return object EasyRdf_Parser_Rapper
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*/
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public function __construct($rapperCmd = 'rapper')
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{
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$result = exec("$rapperCmd --version 2>/dev/null", $output, $status);
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if ($status != 0) {
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throw new EasyRdf_Exception(
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"Failed to execute the command '$rapperCmd': $result"
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);
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} elseif (version_compare($result, self::MINIMUM_RAPPER_VERSION) < 0) {
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throw new EasyRdf_Exception(
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"Version ".self::MINIMUM_RAPPER_VERSION." or higher of rapper is required."
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);
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} else {
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$this->rapperCmd = $rapperCmd;
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}
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}
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/**
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* Parse an RDF document into an EasyRdf_Graph
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*
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* @param object EasyRdf_Graph $graph the graph to load the data into
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* @param string $data the RDF document data
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* @param string $format the format of the input data
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* @param string $baseUri the base URI of the data being parsed
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* @return integer The number of triples added to the graph
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*/
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public function parse($graph, $data, $format, $baseUri)
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{
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parent::checkParseParams($graph, $data, $format, $baseUri);
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$json = EasyRdf_Utils::execCommandPipe(
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$this->rapperCmd,
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array(
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'--quiet',
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'--input', $format,
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'--output', 'json',
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'--ignore-errors',
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'--input-uri', $baseUri,
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'--output-uri', '-', '-'
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),
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$data
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);
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// Parse in the JSON
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return parent::parse($graph, $json, 'json', $baseUri);
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}
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}
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