/**
* @param ReferenceValue $reference
* @param string|null $context
* @param Exception|null $previous
*/
public function __construct(ReferenceValue $reference, $context = null, Exception $previous = null)
{
$this->reference = $reference;
$this->context = $context;
if (null === $context) {
$message = sprintf("Unable to resolve reference %s.", var_export($reference->uri()->toString(), true));
} else {
$message = sprintf("Unable to resolve reference %s from within context %s.", var_export($reference->uri()->toString(), true), var_export($context, true));
}
parent::__construct($message, 0, $previous);
}
/**
* @param UriInterface $referenceUri
* @param Value\ReferenceValue $reference
*
* @return Value\ValueInterface
* @throws Exception\UndefinedReferenceException
*/
protected function resolveExternal(UriInterface $referenceUri, Value\ReferenceValue $reference)
{
try {
$value = $this->reader()->read($this->uriFactory()->create($referenceUri->toString()), $reference->mimeType());
} catch (ReadException $e) {
throw new Exception\UndefinedReferenceException($reference, $this->currentBaseUri(), $e);
}
$this->pushScopeMap($this->scopeMapFactory()->create($referenceUri, $value));
$value = $value->accept($this);
$this->popScopeMap();
$referencePointer = $this->pointerFactory()->createFromUri($referenceUri);
if ($referencePointer->hasAtoms()) {
$value = $this->pointerResolver()->resolve($referencePointer, $value);
if (null === $value) {
throw new Exception\UndefinedReferenceException($reference, $this->currentBaseUri());
}
}
return $value;
}
