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 * Parent class for the EasyRdf parsers
42 * @copyright Copyright (c) 2009-2013 Nicholas J Humfrey
43 * @license http://www.opensource.org/licenses/bsd-license.php
47 /** Mapping from source to graph bnode identifiers */
48 private $bnodeMap = array();
50 /** The current graph to insert triples into */
51 protected $graph = null;
53 /** The format of the document currently being parsed */
54 protected $format = null;
56 /** The base URI for the document currently being parsed */
57 protected $baseUri = null;
60 protected $tripleCount = 0;
63 * Create a new, unique bnode identifier from a source identifier.
64 * If the source identifier has previously been seen, the
65 * same new bnode identifier is returned.
68 protected function remapBnode($name)
70 if (!isset($this->bnodeMap[$name])) {
71 $this->bnodeMap[$name] = $this->graph->newBNodeId();
73 return $this->bnodeMap[$name];
77 * Delete the bnode mapping - to be called at the start of a new parse
80 protected function resetBnodeMap()
82 $this->bnodeMap = array();
86 * Check, cleanup parameters and prepare for parsing
89 protected function checkParseParams($graph, $data, $format, $baseUri)
91 if ($graph == null or !is_object($graph) or
92 !($graph instanceof EasyRdf_Graph)) {
93 throw new InvalidArgumentException(
94 "\$graph should be an EasyRdf_Graph object and cannot be null"
97 $this->graph = $graph;
100 if ($format == null or $format == '') {
101 throw new InvalidArgumentException(
102 "\$format cannot be null or empty"
104 } elseif (is_object($format) and $format instanceof EasyRdf_Format) {
105 $this->format = $format = $format->getName();
106 } elseif (!is_string($format)) {
107 throw new InvalidArgumentException(
108 "\$format should be a string or an EasyRdf_Format object"
111 $this->format = $format;
115 if (!is_string($baseUri)) {
116 throw new InvalidArgumentException(
117 "\$baseUri should be a string"
120 $this->baseUri = new EasyRdf_ParsedUri($baseUri);
123 $this->baseUri = null;
126 // Prepare for parsing
127 $this->resetBnodeMap();
128 $this->tripleCount = 0;
132 * Sub-classes must follow this protocol
135 public function parse($graph, $data, $format, $baseUri)
137 throw new EasyRdf_Exception(
138 "This method should be overridden by sub-classes."
143 * Add a triple to the current graph, and keep count of the number of triples
146 protected function addTriple($resource, $property, $value)
148 $count = $this->graph->add($resource, $property, $value);
149 $this->tripleCount += $count;