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<?php
/*
* (c) Markus Lanthaler <mail@markus-lanthaler.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace ML\JsonLD;
use stdClass as JsonObject;
use ML\IRI\IRI;
/**
* A Document represents a JSON-LD document.
*
* Named graphs are not supported yet.
*
* @author Markus Lanthaler <mail@markus-lanthaler.com>
*/
class Document implements DocumentInterface, JsonLdSerializable
{
/**
* @var IRI The document's IRI
*/
protected $iri = null;
/**
* @var GraphInterface The default graph
*/
protected $defaultGraph = null;
/**
* @var array An associative array holding all named graphs in the document
*/
protected $namedGraphs = array();
/**
* Parses a JSON-LD document and returns it as a Document
*
* The document can be supplied directly as a string or by passing a
* file path or an IRI.
*
* Usage:
* <code>
* $document = Document::load('document.jsonld');
* </code>
*
* <strong>Please note that currently all data is merged into the
* default graph, named graphs are not supported yet!</strong>
*
* It is possible to configure the processing by setting the options
* parameter accordingly. Available options are:
*
* - <em>base</em> The base IRI of the input document.
*
* @param string|array|JsonObject $document The JSON-LD document to process.
* @param null|array|JsonObject $options Options to configure the processing.
*
* @return Document The parsed JSON-LD document.
*
* @throws ParseException If the JSON-LD input document is invalid.
*/
public static function load($document, $options = null)
{
return JsonLD::getDocument($document, $options);
}
/**
* Constructor
*
* @param null|string|IRI $iri The document's IRI
*/
public function __construct($iri = null)
{
$this->iri = new IRI($iri);
$this->defaultGraph = new Graph($this);
}
/**
* {@inheritdoc}
*/
public function setIri($iri)
{
$this->iri = new IRI($iri);
return $this;
}
/**
* {@inheritdoc}
*/
public function getIri($asObject = false)
{
return ($asObject) ? $this->iri : (string) $this->iri;
}
/**
* {@inheritdoc}
*/
public function createGraph($name)
{
$name = (string) $this->iri->resolve($name);
if (isset($this->namedGraphs[$name])) {
return $this->namedGraphs[$name];
}
return $this->namedGraphs[$name] = new Graph($this, $name);
}
/**
* {@inheritdoc}
*/
public function getGraph($name = null)
{
if (null === $name) {
return $this->defaultGraph;
}
$name = (string) $this->iri->resolve($name);
return isset($this->namedGraphs[$name])
? $this->namedGraphs[$name]
: null;
}
/**
* {@inheritdoc}
*/
public function getGraphNames()
{
return array_keys($this->namedGraphs);
}
/**
* {@inheritdoc}
*/
public function containsGraph($name)
{
$name = (string) $this->iri->resolve($name);
return isset($this->namedGraphs[$name]);
}
/**
* {@inheritdoc}
*/
public function removeGraph($graph = null)
{
// The default graph can't be "removed", it can just be reset
if (null === $graph) {
$this->defaultGraph = new Graph($this);
return $this;
}
if ($graph instanceof GraphInterface) {
foreach ($this->namedGraphs as $n => $g) {
if ($g === $graph) {
$name = $n;
break;
}
}
} else {
$name = (string) $this->iri->resolve($graph);
}
if (isset($this->namedGraphs[$name])) {
if ($this->namedGraphs[$name]->getDocument() === $this) {
$this->namedGraphs[$name]->removeFromDocument();
}
unset($this->namedGraphs[$name]);
}
return $this;
}
/**
* {@inheritdoc}
*/
public function toJsonLd($useNativeTypes = true)
{
$defGraph = $this->defaultGraph->toJsonLd($useNativeTypes);
if (0 === count($this->namedGraphs)) {
return $defGraph;
}
foreach ($this->namedGraphs as $graphName => $graph) {
$namedGraph = new JsonObject();
$namedGraph->{'@id'} = $graphName;
$namedGraph->{'@graph'} = $graph->toJsonLd($useNativeTypes);
$defGraph[] = $namedGraph;
}
$document = new JsonObject();
$document->{'@graph'} = $defGraph;
return array($document);
}
}
|
