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Support named graphs when parsing JSON-LD to Document

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1 parent 86c1c85 commit bd9759278ebdd6e8deaf30ae80fb72b1b09de320 @lanthaler committed Mar 18, 2014
Showing with 180 additions and 42 deletions.
  1. +3 −1 Document.php
  2. +2 −2 Graph.php
  3. +6 −2 GraphInterface.php
  4. +0 −3 JsonLD.php
  5. +31 −34 Processor.php
  6. +101 −0 Test/DocumentTest.php
  7. +36 −0 Test/Fixtures/dataset.jsonld
  8. +1 −0 Test/GraphTest.php
View
@@ -149,13 +149,13 @@ public function containsGraph($name)
*/
public function removeGraph($graph = null)
{
+ // The default graph can't be "removed", it can just be reset
if (null === $graph) {
$this->defaultGraph = new Graph($this);
return $this;
}
- $name = $graph;
if ($graph instanceof GraphInterface) {
foreach ($this->namedGraphs as $n => $g) {
@@ -164,6 +164,8 @@ public function removeGraph($graph = null)
break;
}
}
+ } else {
+ $name = (string) $this->iri->resolve($graph);
}
if (isset($this->namedGraphs[$name])) {
View
@@ -54,9 +54,9 @@ public function __construct(DocumentInterface $document = null)
/**
* {@inheritdoc}
*/
- public function createNode($id = null)
+ public function createNode($id = null, $preserveBnodeId = false)
{
- if (!is_string($id) || ('_:' === substr($id, 0, 2))) {
+ if (!is_string($id) || (!$preserveBnodeId && ('_:' === substr($id, 0, 2)))) {
$id = $this->createBlankNodeId();
} else {
$id = (string) $this->resolveIri($id);
View
@@ -26,11 +26,15 @@
* If there exists already a node with the passed ID in the document,
* that node will be returned instead of creating a new one.
*
- * @param null|string $id The ID of the node.
+ * @param null|string $id The ID of the node.
+ * @param bool $preserveBnodeId If set to false, blank nodes are
+ * relabeled to avoid collisions;
+ * otherwise the blank node identifier
+ * is preserved.
*
* @return Node The newly created node.
*/
- public function createNode($id = null);
+ public function createNode($id = null, $preserveBnodeId = false);
/**
* Removes a node from the document
View
@@ -32,9 +32,6 @@ class JsonLD
* $document = JsonLD::getDocument('document.jsonld');
* </code>
*
- * <strong>Please note that currently all data is merged into one graph,
- * named graphs are not supported yet!</strong>
- *
* It is possible to configure the processing by setting the options
* parameter accordingly. Available options are:
*
View
@@ -262,63 +262,60 @@ public static function parse($document)
*/
public function getDocument($input)
{
- // TODO Add support for named graphs
$nodeMap = new Object();
- $nodeMap->{self::UNION_GRAPH} = new Object();
- $this->generateNodeMap($nodeMap, $input, self::UNION_GRAPH);
-
- // As we do not support named graphs yet we are currently just
- // interested in the union graph
- $nodeMap = $nodeMap->{self::UNION_GRAPH};
+ $nodeMap->{self::DEFAULT_GRAPH} = new Object();
+ $this->generateNodeMap($nodeMap, $input);
// We need to keep track of blank nodes as they are renamed when
// inserted into the Document
+ $nodes = array();
if (null === $this->documentFactory) {
$this->documentFactory = new DefaultDocumentFactory();
}
$document = $this->documentFactory->createDocument($this->baseIri);
- $graph = $document->getGraph();
- $nodes = array();
- foreach ($nodeMap as $id => &$item) {
- if (!isset($nodes[$id])) {
- $nodes[$id] = $graph->createNode($item->{'@id'});
+ foreach ($nodeMap as $graphName => &$nodes) {
+ if (self::DEFAULT_GRAPH === $graphName) {
+ $graph = $document->getGraph();
+ } else {
+ $graph = $document->createGraph($graphName);
}
- $node = $nodes[$id];
- unset($item->{'@id'});
+ foreach ($nodes as $id => &$item) {
+ $node = $graph->createNode($item->{'@id'}, true);
+ unset($item->{'@id'});
- // Process node type as it needs to be handled differently than
- // other properties
- if (property_exists($item, '@type')) {
- foreach ($item->{'@type'} as $type) {
- if (!isset($nodes[$type])) {
- $nodes[$type] = $graph->createNode($type);
+ // Process node type as it needs to be handled differently than
+ // other properties
+ // TODO Could this be avoided by enforcing rdf:type instead of @type?
+ if (property_exists($item, '@type')) {
+ foreach ($item->{'@type'} as $type) {
+ $node->addType($graph->createNode($type), true);
}
- $node->addType($nodes[$type]);
+ unset($item->{'@type'});
}
- unset($item->{'@type'});
- }
- foreach ($item as $property => $values) {
- foreach ($values as $value) {
- if (property_exists($value, '@value')) {
- $node->addPropertyValue($property, Value::fromJsonLd($value));
- } elseif (property_exists($value, '@id')) {
- if (!isset($nodes[$value->{'@id'}])) {
- $nodes[$value->{'@id'}] = $graph->createNode($value->{'@id'});
+ foreach ($item as $property => $values) {
+ foreach ($values as $value) {
+ if (property_exists($value, '@value')) {
+ $node->addPropertyValue($property, Value::fromJsonLd($value));
+ } elseif (property_exists($value, '@id')) {
+ $node->addPropertyValue(
+ $property,
+ $graph->createNode($value->{'@id'}, true)
+ );
+ } else {
+ // TODO Handle lists
+ throw new \Exception('Lists are not supported by getDocument() yet');
}
- $node->addPropertyValue($property, $nodes[$value->{'@id'}]);
- } else {
- // TODO Handle lists
- throw new \Exception('Not implemented yet');
}
}
}
}
+
unset($nodeMap);
return $document;
View
@@ -0,0 +1,101 @@
+<?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\Test;
+
+use ML\JsonLD\JsonLD;
+use ML\JsonLD\Processor;
+use ML\JsonLD\Document;
+
+/**
+ * Test the parsing of a JSON-LD document into a Document.
+ *
+ * @author Markus Lanthaler <mail@markus-lanthaler.com>
+ */
+class DocumentTest extends \PHPUnit_Framework_TestCase
+{
+ /**
+ * The document instance being used throughout the tests.
+ *
+ * @var Document
+ */
+ protected $document;
+
+ /**
+ * Create the document to test.
+ */
+ protected function setUp()
+ {
+ $this->document = JsonLD::getDocument(
+ dirname(__FILE__) . DIRECTORY_SEPARATOR . 'Fixtures' . DIRECTORY_SEPARATOR . 'dataset.jsonld',
+ array('base' => 'http://example.com/dataset.jsonld')
+ );
+ }
+
+
+ /**
+ * Tests whether all nodes are returned and blank nodes are renamed accordingly.
+ */
+ public function testGetIri()
+ {
+ $this->assertEquals(
+ 'http://example.com/dataset.jsonld',
+ $this->document->getIri()
+ );
+ }
+
+ /**
+ * Tests whether all nodes are interlinked correctly.
+ */
+ public function testGetGraphNames()
+ {
+ // The blank node graph name _:_:graphBn gets relabeled to _:b0 during node map generation
+ $this->assertEquals(
+ array('_:b0', 'http://example.com/named-graph'),
+ $this->document->getGraphNames()
+ );
+ }
+
+ /**
+ * Tests whether all nodes also have the correct reverse links.
+ */
+ public function testContainsGraph()
+ {
+ $this->assertTrue(
+ $this->document->containsGraph('/named-graph'),
+ 'Relative IRI'
+ );
+ $this->assertTrue(
+ $this->document->containsGraph('http://example.com/named-graph'),
+ 'Absolute IRI'
+ );
+ $this->assertTrue(
+ $this->document->containsGraph('_:b0'),
+ 'Blank node identifier'
+ );
+
+ $this->assertFalse(
+ $this->document->containsGraph('http://example.org/not-here'),
+ 'Non-existent graph'
+ );
+ }
+
+ /**
+ * Tests isBlankNode()
+ */
+ public function testRemoveGraph()
+ {
+ $this->document->removeGraph('/named-graph');
+
+ $this->assertFalse(
+ $this->document->containsGraph('/named-graph'),
+ 'Is the removed graph still there?'
+ );
+ }
+}
@@ -0,0 +1,36 @@
+{
+ "@context": {
+ "@vocab": "http://example.com/vocab#",
+ "references": { "@type": "@id" }
+ },
+ "@graph": [
+ {
+ "@id": "/node1",
+ "references": [ "_:graphBn", "/named-graph" ]
+ },
+ {
+ "@id": "_:graphBn",
+ "@graph": [
+ {
+ "@id": "_:graphBn/node1",
+ "name": "_:graphBn/node1",
+ "references": [ "_:bnode", "/node1", "/named-graph/node1" ]
+ }
+ ]
+ },
+ {
+ "@id": "/named-graph",
+ "@graph": [
+ {
+ "@id": "/named-graph/node1",
+ "name": "/named-graph/node1",
+ "references": [ "_:bnode", "/node1", "_:graphBn/node1" ]
+ }
+ ]
+ },
+ {
+ "@id": "_:bnode",
+ "name": "_:bnode"
+ }
+ ]
+}
View
@@ -647,6 +647,7 @@ public function testCreateExistingNode()
*/
public function testMerge()
{
+ $this->markTestSkipped("Merging graphs doesn't work yet as blank nodes are not relabeled properly");
$json = <<<JSON_LD_DOCUMENT
{

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