Ejemplo n.º 1
0
 /**
  * Parses a given stream and returns an iterator containing Statement instances representing the
  * previously read data. The stream parses the data not as a whole but in chunks.
  *
  * @param  string            $inputStream   Filename of the stream to parse which contains RDF
  *                                          serialized data.
  * @param  string            $baseUri       The base URI of the parsed content. If this URI is null
  *                                          the inputStreams URL is taken as base URI.
  * @param  string            $serialization The serialization of the inputStream. If null is given
  *                                          the parser will either apply some standard serialization,
  *                                          or the only one it is supporting, or will try to guess
  *                                          the correct serialization, or will throw an Exception.
  *                                          Supported formats are a subset of the following:
  *                                          json, rdfxml, sparql-xml, rdfa, turtle, ntriples, n3
  * @return StatementIterator A StatementIterator containing all the Statements parsed by the parser to
  *                           far.
  * @throws \Exception        If the base URI $baseUri is no valid URI.
  */
 public function parseStreamToIterator($inputStream, $baseUri = null, $serialization = null)
 {
     $graph = new Graph();
     // let EasyRdf guess the format
     if ($serialization === null) {
         // use PHP's file:// stream, if its a local file
         if (false === strpos($inputStream, '://')) {
             $inputStream = 'file://' . $inputStream;
         }
         $serialization = Format::guessFormat(file_get_contents($inputStream));
     } else {
         $serialization = Format::getFormat($serialization);
     }
     // if format is still null, throw exception, because we dont know what format the given stream is
     if (null === $serialization) {
         throw new \Exception('Either given $format is unknown or i could not guess format.');
     }
     $graph->parseFile($inputStream, $serialization->getName());
     // transform parsed data to PHP array
     return $this->rdfPhpToStatementIterator($graph->toRdfPhp());
 }
Ejemplo n.º 2
0
<?php

use EasyRdf\Graph;
use EasyRdf\Format;
use EasyRdf\Serialiser\GraphViz;
$app->get('/image', function () {
    $graph = Graph::newAndLoad(site_base_uri() . '/asset/dataset/countries.rdf');
    $format = Format::getFormat('png');
    $viz = new GraphViz();
    header("Content-Type: " . $format->getDefaultMimeType());
    echo $viz->renderImage($graph, $format);
    die;
})->name('home');