/**
* Fetch a schema from the given URI, json-decode it and return it.
* Caches schema objects.
*
* @param string $fetchUri Absolute URI
*
* @return object JSON schema object
*/
protected function loadSchema($fetchUri)
{
if (isset($this->schemaCache[$fetchUri])) {
return $this->schemaCache[$fetchUri];
}
$uriRetriever = $this->getUriRetriever();
$contents = $this->uriRetriever->retrieve($fetchUri);
$this->confirmMediaType($uriRetriever, $fetchUri);
$jsonSchema = json_decode($contents);
if (JSON_ERROR_NONE < ($error = json_last_error())) {
throw new JsonDecodingException($error);
}
$this->schemaCache[$fetchUri] = $jsonSchema;
return $jsonSchema;
}
/**
* {@inheritdoc}
*/
public function getContentType()
{
return $this->lastUsedRetriever ? $this->lastUsedRetriever->getContentType() : null;
}