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<?php
namespace Google\Protobuf\Internal;
/**
* Base class for Google\Protobuf\Any, this contains hand-written convenience
* methods like pack() and unpack().
*/
class AnyBase extends \Google\Protobuf\Internal\Message
{
const TYPE_URL_PREFIX = 'type.googleapis.com/';
/**
* This method will try to resolve the type_url in Any message to get the
* targeted message type. If failed, an error will be thrown. Otherwise,
* the method will create a message of the targeted type and fill it with
* the decoded value in Any.
* @return Message unpacked message
* @throws \Exception Type url needs to be type.googleapis.com/fully-qualified.
* @throws \Exception Class hasn't been added to descriptor pool.
* @throws \Exception cannot decode data in value field.
*/
public function unpack()
{
// Get fully qualified name from type url.
$url_prifix_len = strlen(GPBUtil::TYPE_URL_PREFIX);
if (substr($this->type_url, 0, $url_prifix_len) !=
GPBUtil::TYPE_URL_PREFIX) {
throw new \Exception(
"Type url needs to be type.googleapis.com/fully-qulified");
}
$fully_qualifed_name =
substr($this->type_url, $url_prifix_len);
// Create message according to fully qualified name.
$pool = \Google\Protobuf\Internal\DescriptorPool::getGeneratedPool();
$desc = $pool->getDescriptorByProtoName($fully_qualifed_name);
if (is_null($desc)) {
throw new \Exception("Class ".$fully_qualifed_name
." hasn't been added to descriptor pool");
}
$klass = $desc->getClass();
$msg = new $klass();
// Merge data into message.
$msg->mergeFromString($this->value);
return $msg;
}
/**
* The type_url will be created according to the given message’s type and
* the value is encoded data from the given message..
* @param Message $msg A proto message.
*/
public function pack($msg)
{
if (!$msg instanceof Message) {
trigger_error("Given parameter is not a message instance.",
E_USER_ERROR);
return;
}
// Set value using serialized message.
$this->value = $msg->serializeToString();
// Set type url.
$pool = \Google\Protobuf\Internal\DescriptorPool::getGeneratedPool();
$desc = $pool->getDescriptorByClassName(get_class($msg));
$fully_qualifed_name = $desc->getFullName();
$this->type_url = GPBUtil::TYPE_URL_PREFIX . $fully_qualifed_name;
}
/**
* This method returns whether the type_url in any_message is corresponded
* to the given class.
* @param string $klass The fully qualified PHP class name of a proto message type.
*/
public function is($klass)
{
$pool = \Google\Protobuf\Internal\DescriptorPool::getGeneratedPool();
$desc = $pool->getDescriptorByClassName($klass);
$fully_qualifed_name = $desc->getFullName();
$type_url = GPBUtil::TYPE_URL_PREFIX . $fully_qualifed_name;
return $this->type_url === $type_url;
}
}
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