internal IsoResourceProxy CreateIsoResourceProxy(string key, IFileSystemResourceAccessor isoFileResourceAccessor)
{
IsoResourceProxy result = new IsoResourceProxy(key, isoFileResourceAccessor);
result.Orphaned += OnIsoResourceProxyOrphaned;
return(result);
}
void OnIsoResourceProxyOrphaned(IsoResourceProxy proxy)
{
lock (_syncObj)
{
if (proxy.UsageCount > 0)
// Double check if the proxy was reused when the lock was not set
return;
_isoUsages.Remove(proxy.Key);
proxy.Dispose();
}
}
void OnIsoResourceProxyOrphaned(IsoResourceProxy proxy)
{
lock (_syncObj)
{
if (proxy.UsageCount > 0)
{
// Double check if the proxy was reused when the lock was not set
return;
}
_isoUsages.Remove(proxy.Key);
proxy.Dispose();
}
}
public void Dispose()
{
if (_stream != null)
{
_stream.Dispose();
}
if (_isoProxy == null)
{
return;
}
_isoProxy.DecUsage();
_isoProxy = null;
}
public IsoResourceAccessor(IsoResourceProvider isoProvider, IsoResourceProxy isoProxy, string pathToDirOrFile)
{
if (!pathToDirOrFile.StartsWith("/"))
{
throw new ArgumentException("Wrong path '{0}': Path in ISO file must start with a '/' character", pathToDirOrFile);
}
_isoProxy = isoProxy;
_isoProxy.IncUsage();
try
{
_isoProvider = isoProvider;
_pathToDirOrFile = pathToDirOrFile;
_isDirectory = true;
_lastChanged = _isoProxy.IsoFileResourceAccessor.LastChanged;
_size = -1;
if (IsEmptyOrRoot)
{
return;
}
lock (_isoProxy.SyncObj)
{
string isoPath = ToIsoPath(pathToDirOrFile);
if (_isoProxy.DiskFileSystem.FileExists(isoPath))
{
_isDirectory = false;
_size = _isoProxy.DiskFileSystem.GetFileLength(isoPath);
_lastChanged = _isoProxy.DiskFileSystem.GetLastWriteTime(isoPath);
return;
}
if (_isoProxy.DiskFileSystem.DirectoryExists(isoPath))
{
_isDirectory = true;
_size = -1;
_lastChanged = _isoProxy.DiskFileSystem.GetLastWriteTime(isoPath);
return;
}
throw new ArgumentException(string.Format("IsoResourceAccessor cannot access path or file '{0}' in iso-file", isoPath));
}
}
catch (Exception)
{
_isoProxy.DecUsage();
throw;
}
}
public bool IsResource(IFileSystemResourceAccessor baseResourceAccessor, string path)
{
string resourceName = baseResourceAccessor.ResourceName;
if (string.IsNullOrEmpty(resourceName) || !baseResourceAccessor.IsFile)
{
return(false);
}
// Test if we have already an ISO proxy for that ISO file...
lock (_syncObj)
{
string key = baseResourceAccessor.CanonicalLocalResourcePath.Serialize();
try
{
IsoResourceProxy proxy;
if (_isoUsages.TryGetValue(key, out proxy))
{
lock (proxy.SyncObj)
return(IsoResourceAccessor.IsResource(proxy.DiskFileSystem, path));
}
}
catch (Exception)
{
return(false);
}
}
// ... if not, test the resource in a new disk file system instance
using (Stream underlayingStream = baseResourceAccessor.OpenRead())
{
try
{
IFileSystem diskFileSystem = IsoResourceProxy.GetFileSystem(underlayingStream);
using (diskFileSystem as IDisposable)
return(IsoResourceAccessor.IsResource(diskFileSystem, path));
}
catch
{
return(false);
}
}
}
public IsoResourceAccessor(IsoResourceProvider isoProvider, IsoResourceProxy isoProxy, string pathToDirOrFile)
{
if (!pathToDirOrFile.StartsWith("/"))
throw new ArgumentException("Wrong path '{0}': Path in ISO file must start with a '/' character", pathToDirOrFile);
_isoProxy = isoProxy;
_isoProxy.IncUsage();
try
{
_isoProvider = isoProvider;
_pathToDirOrFile = pathToDirOrFile;
_isDirectory = true;
_lastChanged = _isoProxy.IsoFileResourceAccessor.LastChanged;
_size = -1;
if (IsEmptyOrRoot)
return;
lock (_isoProxy.SyncObj)
{
string isoPath = ToIsoPath(pathToDirOrFile);
if (_isoProxy.DiskFileSystem.FileExists(isoPath))
{
_isDirectory = false;
_size = _isoProxy.DiskFileSystem.GetFileLength(isoPath);
_lastChanged = _isoProxy.DiskFileSystem.GetLastWriteTime(isoPath);
return;
}
if (_isoProxy.DiskFileSystem.DirectoryExists(isoPath))
{
_isDirectory = true;
_size = -1;
_lastChanged = _isoProxy.DiskFileSystem.GetLastWriteTime(isoPath);
return;
}
throw new ArgumentException(string.Format("IsoResourceAccessor cannot access path or file '{0}' in iso-file", isoPath));
}
}
catch (Exception)
{
_isoProxy.DecUsage();
throw;
}
}
internal IsoResourceProxy CreateIsoResourceProxy(string key, IResourceAccessor isoFileResourceAccessor)
{
IsoResourceProxy result = new IsoResourceProxy(key, isoFileResourceAccessor);
result.Orphaned += OnIsoResourceProxyOrphaned;
return result;
}
public void Dispose()
{
if (_stream != null)
_stream.Dispose();
if (_isoProxy == null)
return;
_isoProxy.DecUsage();
_isoProxy = null;
}
