/**
* Tests the serialization of graphs
*/
public function testSerializeGraph()
{
// This is the expanded and flattened version of the test document
// (the blank node labels have been renamed from _:t... to _:b...)
$expected = Processor::loadDocument('[{
"@id": "_:b0",
"http://vocab.com/nested": [{
"@value": "1.1"
}]
}, {
"@id": "_:b1",
"http://vocab.com/nested": [{
"@value": "2.1"
}]
}, {
"@id": "_:b2",
"http://vocab.com/nested": [{
"@value": "2.2"
}]
}, {
"@id": "_:b3",
"http://vocab.com/nested": [{
"@value": "3.1"
}]
}, {
"@id": "http://example.com/node/1",
"@type": ["http://vocab.com/type/node"],
"http://vocab.com/contains": [{
"@id": "_:b0"
}],
"http://vocab.com/link": [{
"@id": "http://example.com/node/2"
}],
"http://vocab.com/name": [{
"@value": "1"
}]
}, {
"@id": "http://example.com/node/2",
"@type": ["http://vocab.com/type/nodeWithAliases"],
"http://vocab.com/aliases": [{
"@value": "node2"
}, {
"@value": 2,
"@type": "http://www.w3.org/2001/XMLSchema#integer"
}],
"http://vocab.com/contains": [{
"@id": "_:b1"
}, {
"@id": "_:b2"
}],
"http://vocab.com/lang": [{
"@language": "en",
"@value": "language-tagged string"
}],
"http://vocab.com/link": [{
"@id": "http://example.com/node/3"
}],
"http://vocab.com/name": [{
"@value": "2"
}],
"http://vocab.com/typed": [{
"@type": "http://vocab.com/type/datatype",
"@value": "typed value"
}]
}, {
"@id": "http://example.com/node/3",
"@type": ["http://vocab.com/type/node"],
"http://vocab.com/contains": [{
"@id": "_:b3"
}],
"http://vocab.com/lang": [{
"@language": "en",
"@value": "language-tagged string: en"
}, {
"@language": "de",
"@value": "language-tagged string: de"
}],
"http://vocab.com/link": [{
"@id": "http://example.com/node/1"
}],
"http://vocab.com/name": [{
"@value": "3"
}],
"http://vocab.com/typed": [{
"@type": "http://vocab.com/type/datatype",
"@value": "typed value"
}, {
"@language": "ex:/type/otherDataType",
"@value": "typed value"
}, {
"@language": "ex:/type/datatype",
"@value": "typed value"
}]
}, {
"@id": "http://vocab.com/type/node"
}, {
"@id": "http://vocab.com/type/nodeWithAliases"
}]');
$this->assertEquals($expected, $this->graph->toJsonLd(false), 'Serialize graph');
}
/**
* {@inheritdoc}
*/
public function merge(GraphInterface $graph)
{
$nodes = $graph->getNodes();
$bnodeMap = array();
foreach ($nodes as $node) {
if ($node->isBlankNode()) {
if (false === isset($bnodeMap[$node->getId()])) {
$bnodeMap[$node->getId()] = $this->createNode();
}
$n = $bnodeMap[$node->getId()];
} else {
$n = $this->createNode($node->getId());
}
foreach ($node->getProperties() as $property => $values) {
if (false === is_array($values)) {
$values = array($values);
}
foreach ($values as $val) {
if ($val instanceof NodeInterface) {
// If the value is another node, we just need to
// create a reference to the corresponding node
// in this graph. The properties will be merged
// in the outer loop
if ($val->isBlankNode()) {
if (false === isset($bnodeMap[$val->getId()])) {
$bnodeMap[$val->getId()] = $this->createNode();
}
$val = $bnodeMap[$val->getId()];
} else {
$val = $this->createNode($val->getId());
}
} elseif (is_object($val)) {
// Clone typed values and language-tagged strings
$val = clone $val;
}
$n->addPropertyValue($property, $val);
}
}
}
return $this;
}
