#include <assets.h>

Inheritance diagram for AssetInterface:

Detailed Description

An Asset represents digital content which can be managed by an asset repository. The management includes versioning, meta data and automatic updates.

Public Member Functions
MAXON_METHOD void	SetId (const IdAndVersion &aid, Int update, const AssetRepositoryRef &repository, const Url &url=GetPtrSizedZeroRef< Url >())

MAXON_METHOD const AssetType &	GetType () const

MAXON_METHOD Result< AssetDescription >	GetDescription () const

MAXON_METHOD Result< Bool >	GetReferencedAssets (Bool onlyUpdatable, const ValueReceiver< const AssetReference & > &receiver) const

MAXON_METHOD Result< Bool >	GetPendingUpdates (const Block< const AssetBase > &updatedAssets, const ValueReceiver< const AssetReference &, const AssetBase & > &receiver) const

MAXON_METHOD void	SetMetaData (const AssetMetaData &data)

MAXON_METHOD AssetMetaData	GetMetaData () const

Static Public Member Functions
static MAXON_METHOD const AssetRepositoryRef &	GetBuiltinRepository ()

static MAXON_METHOD const AssetRepositoryRef &	GetApplicationRepository ()

static MAXON_METHOD const UpdatableAssetRepositoryRef &	GetUserPrefsRepository ()

static MAXON_METHOD Result< UpdatableAssetRepositoryRef >	CreateRepositoryFromUrl (const Id &rid, const Class< AssetRepositoryRef > &repoType, const Block< const AssetRepositoryRef > &bases, const Url &url, Bool writable, Bool derivedInPrefs, Bool tempRepository, const BackgroundEntryTuple &backgroundJob={})

static MAXON_METHOD Result< Id >	MakeUuid (const Char *prefix, Bool compact)

static MAXON_METHOD Result< Url >	AddRepositoryScope (const Url &url, const AssetRepositoryRef &repository)

static MAXON_METHOD Result< InternedId >	GetLanguageMetaDataId (const Id &languageId)

static MAXON_METHOD Result< String >	GetVersionString (const AssetDescription &asset)

static MAXON_METHOD Result< String >	GetVersionString (const Asset &asset)

static MAXON_METHOD Result< AssetDescription >	ResolveAsset (const Url &url, const AssetRepositoryRef &repository)

static MAXON_METHOD Result< Url >	GetAssetUrl (const AssetDescription &asset, Bool isLatest)

static MAXON_METHOD Result< Bool >	IsAssetValid (const AssetDescription &asset)

static MAXON_METHOD Result< Bool >	IsAssetVisible (const AssetDescription &asset)

Private Member Functions
	MAXON_INTERFACE (AssetInterface, MAXON_REFERENCE_COPY_ON_WRITE, "net.maxon.interface.asset")

Member Function Documentation

◆ MAXON_INTERFACE()

MAXON_INTERFACE	(	AssetInterface	,
		MAXON_REFERENCE_COPY_ON_WRITE	,
		"net.maxon.interface.asset"
	)

private

◆ GetBuiltinRepository()

static MAXON_METHOD const AssetRepositoryRef& GetBuiltinRepository ( )

static

Returns the built-in repository. This contains the built-in assets which are defined by program code (i.e., not by a data format to read them from a data stream).

Returns: Reference to the built-in repository.

See also: BuiltinAssetLoaders

◆ GetApplicationRepository()

static MAXON_METHOD const AssetRepositoryRef& GetApplicationRepository ( )

static

Returns the application repository. The application repository uses the built-in repository as base and adds the assets found in the resources of the asset.module.

Returns: Reference to the application repository.

◆ GetUserPrefsRepository()

static MAXON_METHOD const UpdatableAssetRepositoryRef& GetUserPrefsRepository ( )

static

Returns the asset repository in the user preferences folder. This repository is writable for the user.

Returns: Reference to the repository in the user preferences folder.

◆ CreateRepositoryFromUrl()

static MAXON_METHOD Result<UpdatableAssetRepositoryRef> CreateRepositoryFromUrl	(	const Id &	rid,
		const Class< AssetRepositoryRef > &	repoType,
		const Block< const AssetRepositoryRef > &	bases,
		const Url &	url,
		Bool	writable,
		Bool	derivedInPrefs,
		Bool	tempRepository,
		const BackgroundEntryTuple &	backgroundJob = `{}`
	)

static

Creates an asset repository for the given Url. If there already is a directory structure in the expected format it is read as far as needed to initialize the repository with the found assets, otherwise such a directory structure is created.

Parameters

[in]	rid	The repository identifier. There mustn't be a base with the same identifier.
[in]	repoType	See AssetRepositoryTypes registry.
[in]	bases	The base repositories for the new repository.
[in]	url	The root directory to use for the repository.
[in]	writable	True if the repository shall be writable.
[in]	derivedInPrefs	True if derived meta data shall be stored in the user preferences folder. This is mandatory if #url is a read-only Url.
[in]	tempRepository	True if the repository should not be registered as a description database.
[in]	backgroundJob	Optional background job to report errors, warnings, progress, cancellation.

Returns: An asset repository stored at #url.

◆ MakeUuid()

static MAXON_METHOD Result<Id> MakeUuid	(	const Char *	prefix,
		Bool	compact
	)

static

Creates a UUID (universally unique identifier). If prefix is given, the returned identifier starts with prefix, followed by an @ sign, followed by the UUID such as {base@5e75b5e319f64055ac5387490d7355c0}, otherwise it is a UUID only. If prefix already contains an @ sign, only the part before that sign is used.

If compact is true, a Base64-encoding with $ and _ as last characters is used for the UUID instead of the default Hex encoding, and it's ensured that the resulting characters of the encoding don't start with a digit. This results in shorter UUIDs like {FR4pAc$UFR_jXb16rXadEB}. In compact mode and when there are dot characters in prefix, only the part of prefix after the last dot is used.

Parameters

[in]	prefix	The prefix for the identifier, may be nullptr. Only the characters up to the first @ sign are used.
[in]	compact	True if the shorter Base64-encoding shall be used, false for Hex encoding.

Returns: A new UUID. It is safe to assume that this UUID differs from any other UUID returned by this method.

◆ AddRepositoryScope()

static MAXON_METHOD Result<Url> AddRepositoryScope	(	const Url &	url,
		const AssetRepositoryRef &	repository
	)

static

AddRepositoryScope resolves the asset url and caching the assetdescription in the url.

Parameters

[in]	url	Url to investigate.
[in]	repository	Repository to search.

Returns: Modified url which contains the AssetDescription on success.

◆ GetLanguageMetaDataId()

static MAXON_METHOD Result<InternedId> GetLanguageMetaDataId ( const Id & languageId )

static

GetLanguageMetaDataId returns the standardized InternedId for the given languageid.

Parameters

[in] languageId Language id.

Returns: InternedId on success.

◆ GetVersionString() [1/2]

static MAXON_METHOD Result<String> GetVersionString ( const AssetDescription & asset )

static

GetVersionString returns the version string for the given asset.

Parameters

[in] asset Asset to look at.

Returns: Version string on success.

◆ GetVersionString() [2/2]

static MAXON_METHOD Result<String> GetVersionString ( const Asset & asset )

static

GetVersionString returns the version string for the given asset.

Parameters

[in] asset Asset to look at.

Returns: Version string on success.

◆ SetId()

MAXON_METHOD void SetId	(	const IdAndVersion &	aid,
		Int	update,
		const AssetRepositoryRef &	repository,
		const Url &	url = `GetPtrSizedZeroRef< Url >()`
	)

Sets identifier, version and repository of this asset. This method should only be called by the owning asset repository when it stores an asset to establish the link between asset and repository.

Parameters

[in]	aid	Identifier and version identifier of the asset.
[in]	update	Update counter, see AssetBaseWithUpdateInterface::GetUpdate.
[in]	repository	The repository which stored the asset.
[in]	url	An optional Url where the repository stored the asset. @MAXON_ANNOTATION{returnsThis}

◆ GetType()

MAXON_METHOD const AssetType& GetType ( ) const

Returns the AssetType of this asset.

Returns: The asset's type.

◆ GetDescription()

MAXON_METHOD Result<AssetDescription> GetDescription ( ) const

GetDescription returns the AssetDescription of the given Asset.

Returns: AssetDescription on success.

◆ GetReferencedAssets()

MAXON_METHOD Result<Bool> GetReferencedAssets	(	Bool	onlyUpdatable,
		const ValueReceiver< const AssetReference & > &	receiver
	)		const

Yields all direct references which this asset makes to other assets. The AssetReference objects are used later for the update mechanism: The method UpdatableAssetInterface::Update gets a block of tuples (AssetReference, AssetBase) as input, and each tuple indicates to which asset an AssetReference shall be updated. So for example if an asset has two links to the same asset this has to be reported as two AssetReference objects, and when only the first one is passed to UpdatableAssetInterface::Update only the first link has to be updated, while the second has to remain unchanged.

Parameters

[in]	onlyUpdatable	If true only references which use updatable links shall be reported (update policy different from ASSET_UPDATE_POLICY::NEVER), otherwise all references.
[in]	receiver	Receiver to which references are reported.

Returns: false if the receiver cancelled further evaluation, true otherwise.

◆ GetPendingUpdates()

MAXON_METHOD Result<Bool> GetPendingUpdates	(	const Block< const AssetBase > &	updatedAssets,
		const ValueReceiver< const AssetReference &, const AssetBase & > &	receiver
	)		const

Yields all possible AssetReference updates for this asset due to #updatedAssets to #receiver. This method finds all direct references which this asset makes to other assets, and checks if they are affected by the list of #updatedAssets. This check takes into account the update policy of the AssetLink used for the reference. Whenever there is an updatable AssetLink and #updatedAssets contains a newer version for that link, this is reported by a call to #receiver with the reference as first argument and the newer asset from #updatedAssets as second argument.

Parameters

[in]	updatedAssets	A block of assets with (potentially) newer versions.
[in]	receiver	Receiver to which all pending updates due to #updatedAssets are reported.

Returns: false if the receiver cancelled further evaluation, true otherwise.

◆ SetMetaData()

MAXON_METHOD void SetMetaData ( const AssetMetaData & data )

Sets the meta data object to use for this asset. This method should only be called by the owning asset repository.

Parameters

[in] data The meta data of the asset.

◆ GetMetaData()

MAXON_METHOD AssetMetaData GetMetaData ( ) const

Returns the meta data of this asset.

Returns: The meta data of this asset.

◆ ResolveAsset()

static MAXON_METHOD Result<AssetDescription> ResolveAsset	(	const Url &	url,
		const AssetRepositoryRef &	repository
	)

static

ResolveAsset returns the asset description from a given url with the URLSCHEME_ASSET.

Parameters

[in]	url	Url to search.
[in]	repository	Lookup repository.

Returns: AssetDescription on success.

◆ GetAssetUrl()

static MAXON_METHOD Result<Url> GetAssetUrl	(	const AssetDescription &	asset,
		Bool	isLatest
	)

static

GetAssetUrl returns the url to access the asset data. e.g. asset:///file_634545662344

Parameters

[in]	asset	asset to convert.
[in]	isLatest	True if the asset is the latest asset. In that case the version will not be added to the url.

◆ IsAssetValid()

static MAXON_METHOD Result<Bool> IsAssetValid ( const AssetDescription & asset )

static

IsAssetValid checks if the asset is valid for the current license and program version.

Parameters

[in] asset Asset to check

Returns: OK on success.

◆ IsAssetVisible()

static MAXON_METHOD Result<Bool> IsAssetVisible ( const AssetDescription & asset )

static

IsAssetVisible checks if the asset is visible for the current license and program version.

Parameters

[in] asset Asset to check

Returns: OK on success.

Detailed Description

Public Member Functions

Static Public Member Functions

Private Member Functions

Member Function Documentation

◆ MAXON_INTERFACE()

◆ GetBuiltinRepository()

◆ GetApplicationRepository()

◆ GetUserPrefsRepository()

◆ CreateRepositoryFromUrl()

◆ MakeUuid()

◆ AddRepositoryScope()

◆ GetLanguageMetaDataId()

◆ GetVersionString() [1/2]

◆ GetVersionString() [2/2]

◆ SetId()

◆ GetType()

◆ GetDescription()

◆ GetReferencedAssets()

◆ GetPendingUpdates()

◆ SetMetaData()

◆ GetMetaData()

◆ ResolveAsset()

◆ GetAssetUrl()

◆ IsAssetValid()

◆ IsAssetVisible()