//------------------------------------------------------
//
// Public Constructors
//
//------------------------------------------------------
// None
//------------------------------------------------------
//
// Public Properties
//
//------------------------------------------------------
// None
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//
// Public Methods
//
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#region Public Methods
/// <summary>
/// Custom Implementation for the GetStream Method
/// </summary>
/// <param name="mode">Mode in which the stream should be opened</param>
/// <param name="access">Access with which the stream should be opened</param>
/// <returns>Stream Corresponding to this part</returns>
protected override Stream GetStreamCore(FileMode mode, FileAccess access)
{
if (Package.InStreamingCreation)
{
// Convert Metro CompressionOption to Zip CompressionMethodEnum.
CompressionMethodEnum compressionMethod;
DeflateOptionEnum deflateOption;
ZipPackage.GetZipCompressionMethodFromOpcCompressionOption(this.CompressionOption,
out compressionMethod, out deflateOption);
// Mode and access get validated in StreamingZipPartStream().
return(new StreamingZipPartStream(
PackUriHelper.GetStringForPartUri(this.Uri),
_zipArchive,
compressionMethod, deflateOption,
mode, access));
}
else if (_zipFileInfo != null)
{
// Case of an atomic part.
return(_zipFileInfo.GetStream(mode, access));
}
else
{
// Case of an interleaved part.
Invariant.Assert(_pieces != null);
return(new InterleavedZipPartStream(this, mode, access));
}
}
/// <summary>
/// This method is for custom implementation specific to the file format.
/// Deletes the part corresponding to the uri specified. Deleting a part that does not
/// exists is not an error and so we do not throw an exception in that case.
/// </summary>
/// <param name="partUri"></param>
/// <exception cref="ArgumentNullException">If partUri parameter is null</exception>
/// <exception cref="ArgumentException">If partUri parameter does not conform to the valid partUri syntax</exception>
protected override void DeletePartCore(Uri partUri)
{
//Validating the PartUri - this method will do the argument checking required for uri.
partUri = PackUriHelper.ValidatePartUri(partUri);
string partZipName = GetZipItemNameFromOpcName(PackUriHelper.GetStringForPartUri(partUri));
ZipArchiveEntry?zipArchiveEntry = _zipArchive.GetEntry(partZipName);
// Case of an atomic part.
zipArchiveEntry?.Delete();
//Delete the content type for this part if it was specified as an override
_contentTypeHelper.DeleteContentType((PackUriHelper.ValidatedPartUri)partUri);
}
