/**
* Gets a blob
*
* @param string $hash blob hash
* @return GitPHP_Blob blob object
*/
public function GetBlob($hash)
{
if (empty($hash)) {
return null;
}
if (preg_match('/^[0-9A-Fa-f]{4,39}$/', $hash) && !$this->compat) {
$fullHash = $this->project->ExpandHash($hash);
if ($fullHash == $hash) {
throw new GitPHP_InvalidHashException($hash);
}
$hash = $fullHash;
}
if (!preg_match('/^[0-9A-Fa-f]{40}$/', $hash)) {
return null;
}
$key = GitPHP_Blob::CacheKey($this->project->GetProject(), $hash);
$blob = null;
if ($this->memoryCache) {
$blob = $this->memoryCache->Get($key);
}
if (!$blob) {
if ($this->cache) {
$blob = $this->cache->Get($key);
}
$strategy = null;
if ($this->compat) {
$strategy = new GitPHP_BlobLoad_Git($this->exe);
} else {
$strategy = new GitPHP_BlobLoad_Raw($this->objectLoader, $this->exe);
}
if ($blob) {
$blob->SetProject($this->project);
$blob->SetStrategy($strategy);
} else {
$blob = new GitPHP_Blob($this->project, $hash, $strategy);
}
$blob->AddObserver($this);
if ($this->memoryCache) {
$this->memoryCache->Set($key, $blob);
}
}
return $blob;
}
/**
* Gets the cache key to use for this object
*
* @return string cache key
*/
public function GetCacheKey()
{
return GitPHP_Blob::CacheKey($this->project->GetProject(), $this->hash);
}
