#include <ArchiveWriter.h>

Inherits Archive::IArchiveWriter.

Public Types
using	CommitResult = AZStd::expected< void, ResultString >

Public Types inherited from Archive::IArchiveWriter
using	ArchiveStreamPtr = AZStd::unique_ptr< AZ::IO::GenericStream, ArchiveStreamDeleter >

using	CommitResult = AZStd::expected< void, ResultString >

Public Member Functions
	AZ_TYPE_INFO_WITH_NAME_DECL (ArchiveWriter)

	AZ_RTTI_NO_TYPE_INFO_DECL ()

	ArchiveWriter (const ArchiveWriterSettings &writerSettings)
	Create an archive writer using the specified writer settings.

	ArchiveWriter (AZ::IO::PathView archivePath, const ArchiveWriterSettings &writerSettings={})

	ArchiveWriter (ArchiveStreamPtr archiveStream, const ArchiveWriterSettings &writerSettings={})
	Takes ownership of the open stream and will optionally delete it based on the ArchiveFileDeleter.

bool	MountArchive (AZ::IO::PathView archivePath) override

bool	MountArchive (ArchiveStreamPtr archiveStream) override

void	UnmountArchive () override

bool	IsMounted () const override
	Returns if an open archive that is mounted.

CommitResult	Commit () override

ArchiveAddFileResult	AddFileToArchive (AZ::IO::GenericStream &inputStream, const ArchiveWriterFileSettings &fileSettings) override

ArchiveAddFileResult	AddFileToArchive (AZStd::span< const AZStd::byte > inputSpan, const ArchiveWriterFileSettings &fileSettings) override

ArchiveFileToken	FindFile (AZ::IO::PathView relativePath) const override

bool	ContainsFile (AZ::IO::PathView relativePath) const override

ArchiveRemoveFileResult	RemoveFileFromArchive (ArchiveFileToken filePathToken) override

ArchiveRemoveFileResult	RemoveFileFromArchive (AZ::IO::PathView relativePath) override

bool	DumpArchiveMetadata (AZ::IO::GenericStream &metadataStream, const ArchiveMetadataSettings &metadataSettings={}) const override

Public Member Functions inherited from Archive::IArchiveWriter
	AZ_TYPE_INFO_WITH_NAME_DECL (IArchiveWriter)

	AZ_RTTI_NO_TYPE_INFO_DECL ()

Public Attributes
	AZ_CLASS_ALLOCATOR_DECL

Public Attributes inherited from Archive::IArchiveWriter
	AZ_CLASS_ALLOCATOR_DECL

Detailed Description

class which is used to write into a stream the O3DE Archive format The caller is required to supply a ArchiveWriterSettings structure which contains the ArchiveHeader and ArchiveTableOfContents data to use when writing to the Archive file The class can be initialized with a user supplied AZ::IO::GenericStream class in which case it should be open in stream should needs to be open with OpenMode::ModeUpdate The reason why is that to locate information about any content files in order to update an existing archive it read access is needed The recommend OpenMode value for opening a new archive or updating an existing archive are as follows constexpr OpenMode mode = OpenMode::Update | OpenMode::Append | OpenMode::Binary The Append option makes sure that the Archive is not truncated on open

Member Typedef Documentation

◆ CommitResult

using Archive::ArchiveWriter::CommitResult = AZStd::expected<void, ResultString>

Write the updated ArchiveHeader to the beginning of the stream and Table of Contents to end of the stream

If this call is successful, the archive TOC has been successfully written This function has been marked [[nodiscard]], to ensure the caller checks the return value

Returns: A successful expectation if the TOC has been written

Constructor & Destructor Documentation

◆ ArchiveWriter()

Archive::ArchiveWriter::ArchiveWriter	(	AZ::IO::PathView	archivePath,
		const ArchiveWriterSettings &	writerSettings = `{}`
	)

explicit

Open an file at the specified file path and takes sole ownership of it The ArchiveWriter will close the file on Unmount

Member Function Documentation

◆ AddFileToArchive() [1/2]

ArchiveAddFileResult Archive::ArchiveWriter::AddFileToArchive	(	AZ::IO::GenericStream &	inputStream,
		const ArchiveWriterFileSettings &	fileSettings
	)

overridevirtual

Adds the content from the stream to the relative path

Parameters

inputStream	stream class where data for the file is source from The entire stream is read into the memory and written into archive
fileSettings	settings used to configure the relative path to write to the archive for the given file data. It also allows users to configure the compression algorithm to use, and whether the AddFileToArchive logic fails if an existing file is being added

Returns: ArchiveAddFileResult containing the actual compression file path as saved to the Archive TOC, the compression algorithm used and an Archive File Token which can be used to remove the file if need be On failure, the result outcome contains any errors that have occurred

Implements Archive::IArchiveWriter.

◆ AddFileToArchive() [2/2]

ArchiveAddFileResult Archive::ArchiveWriter::AddFileToArchive	(	AZStd::span< const AZStd::byte >	inputSpan,
		const ArchiveWriterFileSettings &	fileSettings
	)

overridevirtual

Use the span contents to add the file to the archive

Parameters

inputSpan	view of data which will be written to the archive at the relative path supplied in the @fileSettings parameter
fileSettings	settings used to configure the relative path to write to the archive for the given file data. It also allows users to configure the compression algorithm to use, and whether the AddFileToArchive logic fails if an existing file is being added

Returns: ArchiveAddFileResult containing the actual compression file path as saved to the Archive TOC, the compression algorithm used and an Archive File Token which can be used to remove the file if need be On failure, the result outcome contains any errors that have occurred

Implements Archive::IArchiveWriter.

◆ ContainsFile()

bool Archive::ArchiveWriter::ContainsFile ( AZ::IO::PathView relativePath ) const

overridevirtual

Returns if the archive contains a relative path

Parameters

relativePath Relative path within archive to search for

Returns: true if the relative path is contained with the Archive equivalent to return FindFile(relativePath) != InvalidArchiveFileToken;

Implements Archive::IArchiveWriter.

◆ DumpArchiveMetadata()

bool Archive::ArchiveWriter::DumpArchiveMetadata	(	AZ::IO::GenericStream &	metadataStream,
		const ArchiveMetadataSettings &	metadataSettings = `{}`
	)		const

overridevirtual

Dump metadata for the archive to the supplied generic stream

Parameters

metadataStream	archive file metadata will be written to the stream
metadataSettings	settings using which control the file metadata to write to the stream

Returns: true if metadata was successfully written

Implements Archive::IArchiveWriter.

◆ FindFile()

ArchiveFileToken Archive::ArchiveWriter::FindFile ( AZ::IO::PathView relativePath ) const

overridevirtual

Searches for a relative path within the archive

Parameters

relativePath Relative path within archive to search for

Returns: A token that identifies the Archive file if it exist if the with the specified path doesn't exist InvalidArchiveFileToken is returned

Implements Archive::IArchiveWriter.

◆ MountArchive()

bool Archive::ArchiveWriter::MountArchive ( AZ::IO::PathView archivePath )

overridevirtual

Opens the archive path and returns true if successful Will unmount any previously mounted archive

Implements Archive::IArchiveWriter.

◆ RemoveFileFromArchive() [1/2]

ArchiveRemoveFileResult Archive::ArchiveWriter::RemoveFileFromArchive ( ArchiveFileToken filePathToken )

overridevirtual

Removes the file from the archive using the ArchiveFileToken

Parameters

filePathToken Identifier queried using FindFile or AddFileToArchive NOTE: The entry in the table of contents is not actually removed The index where the file is located using the filePathToken is just added to the removed file indices set

Returns: ArchiveRemoveResult with metadata about how the deleted file was stored in the Archive

Implements Archive::IArchiveWriter.

◆ RemoveFileFromArchive() [2/2]

ArchiveRemoveFileResult Archive::ArchiveWriter::RemoveFileFromArchive ( AZ::IO::PathView relativePath )

overridevirtual

Removes the file from the archive using a relative path name

Parameters

relativePath relative path within archive to search for

Returns: ArchiveRemoveResult with metadata about how the deleted file was stored in the Archive

Implements Archive::IArchiveWriter.

◆ UnmountArchive()

void Archive::ArchiveWriter::UnmountArchive ( )

overridevirtual

Closes the handle to the mounted archive stream This will invoke the Commit() function to write the archive TOC to the stream before closing the stream

Implements Archive::IArchiveWriter.

The documentation for this class was generated from the following file:

Gems/Archive/Code/Source/Tools/ArchiveWriter.h

Public Types

Public Member Functions

Public Attributes

Detailed Description

Member Typedef Documentation

◆ CommitResult

Constructor & Destructor Documentation

◆ ArchiveWriter()

Member Function Documentation

◆ AddFileToArchive() [1/2]

◆ AddFileToArchive() [2/2]

◆ ContainsFile()

◆ DumpArchiveMetadata()

◆ FindFile()

◆ MountArchive()

◆ RemoveFileFromArchive() [1/2]

◆ RemoveFileFromArchive() [2/2]

◆ UnmountArchive()