PHP code example of sweetrdf / rdfinterface2easyrdf

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

sweetrdf / rdfinterface2easyrdf example snippets

  # let's prepare all kind of rdfInterface objects
  $blank = quickRdf\DataFactory::blankNode();
  $named = quickRdf\DataFactory::namedNode('http://foo');
  $literal = quickRdf\DataFactory::literal('bar', 'en');
  $quad = quickRdf\DataFactory::quad($blank, $named, $literal);
  $dataset = new quickRdf\Dataset();
  $dataset->add($quad);
  $node = $dataset->withTerm($named);

  print_r(rdfInterface2easyRdf\AsEasyRdf::AsEasyRdf($blank));
  print_r(rdfInterface2easyRdf\AsEasyRdf::AsEasyRdf($named));
  print_r(rdfInterface2easyRdf\AsEasyRdf::AsEasyRdf($literal));
  echo rdfInterface2easyRdf\AsEasyRdf::AsEasyRdf($quad)->getGraph()->dump('text');
  echo rdfInterface2easyRdf\AsEasyRdf::AsEasyRdf($node)->getGraph()->dump('text');
  echo rdfInterface2easyRdf\AsEasyRdf::AsEasyRdf($dataset)->dump('text');
  

    $graph = new EasyRdf\Graph();
    $graph->resource('http://baz')->addLiteral('https://foo', 'other value');
    rdfInterface2easyRdf\AsEasyRdf::AsEasyRdf($quad, $graph);
    echo $graph->dump('text');
    

$graph = new EasyRdf\Graph();
$blank = $graph->resource('_:blank');
$res1  = $graph->resource('http://foo');
$res2  = $graph->resource('http://baz');
$res1->add('http://resource', $res2);
$lit1  = new EasyRdf\Literal('literal', 'en');
$lit2  = new EasyRdf\Literal(1, null, 'http://www.w3.org/2001/XMLSchema#integer');
$res1->addLiteral('http://langLiteral', $lit1);
$res1->addLiteral('http://intLiteral', $lit2);
$res3  = $graph->resource('http://marry');
$res3->addLiteral('http://langLiteral', $lit1);

$df = new quickRdf\DataFactory();

  print_r(rdfInterface2easyRdf\AsRdfInterface::asRdfInterface($blank, $df));
  # as $res2 contains no properties, it's converted to a named node
  print_r(rdfInterface2easyRdf\AsRdfInterface::asRdfInterface($res2, $df));
  print_r(rdfInterface2easyRdf\AsRdfInterface::asRdfInterface($lit1, $df));
  print_r(rdfInterface2easyRdf\AsRdfInterface::asRdfInterface($lit2, $df));
  # as $res1 contains properties, it's converted to a quad iterator
  print_r(rdfInterface2easyRdf\AsRdfInterface::asRdfInterface($res1, $df));
  foreach (rdfInterface2easyRdf\AsRdfInterface::asRdfInterface($res1, $df) as $i) {
    print_r($i);
  }
  # EasyRdf\Graph is also converted to a quad iterator
  print_r(rdfInterface2easyRdf\AsRdfInterface::asRdfInterface($graph, $df));
  foreach (rdfInterface2easyRdf\AsRdfInterface::asRdfInterface($graph, $df) as $i) {
    print_r($i);
  }
  

  print_r(rdfInterface2easyRdf\AsRdfInterface::asRdfInterface($res1, $df));
  print_r(rdfInterface2easyRdf\AsRdfInterface::asTerm($res1, $df));
  

  echo $graph->dump('text');

  # using quad iterator returned by the asRdfInterface()
  $dataset = new quickRdf\Dataset();
  $dataset->add(rdfInterface2easyRdf\AsRdfInterface::asRdfInterface($graph, $df));
  echo $dataset;

  # using add()/addDataset() method
  # (addDataset() works the same, just has strictly defined return type)
  $dataset = rdfInterface2easyRdf\AsRdfInterface::add($graph, $df, new quickRdf\Dataset());
  echo $dataset;
  
  # similarly for an EasyRdf\Resource
  # (just only given resource triples are converted)
  $dataset = new quickRdf\Dataset();
  $dataset->add(rdfInterface2easyRdf\AsRdfInterface::asRdfInterface($res1, $df));
  echo $dataset;
  $dataset = rdfInterface2easyRdf\AsRdfInterface::add($res1, $df, new quickRdf\Dataset());
  echo $dataset;
  # using add()/addDataset() we can also enforce 
  # a whole graph to be converted based on an EasyRdf\Resource
  $dataset = rdfInterface2easyRdf\AsRdfInterface::add($res1, $df, new quickRdf\Dataset(), true);
  echo $dataset;
  

  echo $graph->dump('text');

  $emptyDatasetNode = new rdfHelpers\DatasetNode(new quickRdf\Dataset(), $df::blankNode());
  $datasetNode = rdfInterface2easyRdf\AsRdfInterface::add($res1, $df, $emptyDatasetNode);
  print_r($datasetNode->getNode());
  # the dataset attached to the dataset node contains all triples
  echo $datasetNode->getDataset();
  # but the dataset node itself returns only triples of the converted EasyRdf\Resource
  foreach($datasetNode as $i) {
    echo "$i\n";
  }

  # conversion could be limited to EasyRdf\Resource triples only using the $wholeGraph parameter
  $emptyDatasetNode = new rdfHelpers\DatasetNode(new quickRdf\Dataset(), $df::blankNode());
  $datasetNode = rdfInterface2easyRdf\AsRdfInterface::add($res1, $df, $emptyDatasetNode, false);
  print_r($datasetNode->getNode());
  # the dataset attached to the dataset node contains all triples
  echo $datasetNode->getDataset();

  # addDatasetNode() works in the same way, just has narrower return type
  $emptyDatasetNode = new rdfHelpers\DatasetNode(new quickRdf\Dataset(), $df::blankNode());
  $datasetNode = rdfInterface2easyRdf\AsRdfInterface::addDatasetNode($res1, $df, $emptyDatasetNode);
  print_r($datasetNode->getNode());
  echo $datasetNode->getDataset();
  

  $dataset = rdfInterface2easyRdf\AsRdfInterface::addDataset($res1, $df, fn() => new quickRdf\Dataset());

  $datasetNode = rdfInterface2easyRdf\AsRdfInterface::addDatasetNode(
    $res1, 
    $df, 
    fn($x) => new rdfHelpers\DatasetNode(new quickRdf\Dataset(), $x)
  );