/**
* Gets a single head
*
* @param string $head head to find
* @param string $hash hash of head, if known
* @return GitPHP_Head head object
*/
public function GetHead($head, $hash = '')
{
if (empty($head)) {
return null;
}
$key = GitPHP_Head::CacheKey($this->project->GetProject(), $head);
$headObj = null;
if ($this->memoryCache) {
$headObj = $this->memoryCache->Get($key);
}
if (!$headObj) {
$headObj = new GitPHP_Head($this->project, $head, $hash);
if ($this->memoryCache) {
$this->memoryCache->Set($key, $headObj);
}
}
return $headObj;
}
/**
* Compares two heads by age
*
* @param GitPHP_Head $a first head
* @param GitPHP_Head $b second head
* @return integer comparison result
*/
public static function CompareAge($a, $b)
{
$aObj = $a->GetCommit();
$bObj = $b->GetCommit();
return GitPHP_Commit::CompareAge($aObj, $bObj);
}