Interface for a facility that avoids duplicates based on value hashes. More...

Inheritance diagram for Wikibase\Repo\Rdf\DedupeBag:

Public Member Functions
	alreadySeen ( $hash, $namespace='')
	Check whether alreadySeen() has been called with the same $hash and $namespace before on this DedupeBag instance. More...

Detailed Description

Interface for a facility that avoids duplicates based on value hashes.

Member Function Documentation

Wikibase\Repo\Rdf\DedupeBag::alreadySeen	(	$hash,
		$namespace = `''`
	)

Check whether alreadySeen() has been called with the same $hash and $namespace before on this DedupeBag instance.

This can be used to avoid processing or generating data multiple times, based on a hash value that can be checked against the bag.

Note: False negatives are acceptable, while false positives are not. This means that implementations are free to return false if it is not sure whether the hash was seen before, but should never return true if it is not certain that the hash was seen before.

Parameters

string	$hash	Hash to check
string	$namespace	Optional namespace to allow a compartmentalized bag, tracking hashes from multiple value sets.

The documentation for this interface was generated from the following file: