bool supports(ResourceInterface $metadata)

Queries the ResourceChecker whether it can validate a given resource or not.

Parameters

ResourceInterface

$metadata

The resource to be checked for freshness

Return Value

bool	True if the ResourceChecker can handle this resource type, false if not

bool isFresh(ResourceInterface $resource, int $timestamp)

Validates the resource.

Parameters

ResourceInterface	$resource	The resource to be validated
int	$timestamp	The timestamp at which the cache associated with this resource was created

Return Value

bool	True if the resource has not changed since the given timestamp, false otherwise