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Source Class

Represents a source (individual layer) in the LVFS.

Inheritance Hierarchy

System.Object
  LVFS.External.Source
    LVFS.External.WritableSource
Namespace: LVFS.External
Assembly: LVFS (in LVFS.dll) Version: 1.0.0.0 (1.0.0.0)

Syntax

C#

public abstract class Source

VB

Public MustInherit Class Source

C++

public ref class Source abstract

F#

[<AbstractClassAttribute>]
type Source =  class end

The Source type exposes the following members.

Constructors

 

	Name	Description
	Source	Construct a source.

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Properties

 

	Name	Description
	HasWritablePredecessor	True if a predecessor source exists and is writable
	IsFirst	True if this source has no predecessor. False otherwise.
	IsWritable	True if the source is writable

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Methods

 

	Name	Description
	CleanupFileHandle	Called when the last handle for a file has been closed, but not necessarily released. This is an appropriate place to delete the file if DeleteOnClose is set. This must recursively call the predecessor version if the predecessor source may have been invloved in any operations with this context.
	CloseFileHandle	Called once the last handle for a file has been closed and released. info.Context will be lost after this method returns, so must be ready for this. This must recursively call the predecessor version if the predecessor source may have been invloved in any operations with this context.
	ControlsFile	Gets whether or not this source controls the specified file
	CreateFileHandle	Called when a file handle is requested. If this is an inappropriate action for this source, the request is passed on to the predecessor.
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	GetFileInformation	Gets file information for the file with the specified path (if it exists in this source or a predecessor), or null otherwise.
	GetFileSystemSecurity	Gets a FileSystemSecurity object representing security information for the requested path, filtered to only include the specified sections. Returns null if the file cannot be found in this or a predecessor source, and throws an UnauthorisedAccessException if the OS denies access to the data requested.
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetPredecessorFileInformation	As with GetFileInformation, but for the predecessor source.
	GetPredecessorFileSystemSecurity	As with GetFileSystemSecurity, but for the predecessor source.
	GetSpaceInformation	If possible, returns a tuple of the free, total and available space for the storage medium holding the current source. Otherwise, returns null.
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	HasDirectory	Gets whether or not this source or a predecessor controls the specified directory.
	HasFile	Gets whether or not this source or a predecessor controls the specified file.
	HasFilesInDirectory	Gets whether or not this source or a predecessor exposes a directory which is non-empty.
	HasRegularFile	Gets whether or not this source or a predecessor controls the specified regular (i.e. non-directory) file.
	ListFiles	Lists the files and subdirectories contained within a given directory, including those of the predecessor source.
	ListPredecessorFiles	As with ListFiles, but for the predecessor source.
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	OnMount	Called when a filesystem including the source is mounted.
	OnUnmount	Called when a filesystem including the source is unmounted.
	PredecessorCleanupFileHandle	As with CleanupFileHandle, but for the predecessor source.
	PredecessorCloseFileHandle	As with CloseFileHandle, but for the predecessor source.
	PredecessorCreateFileHandle	As with CreateFileHandle, but for the predecessor source.
	PredecessorHasDirectory	As with HasDirectory(String), but for the predecessor source.
	PredecessorHasFile	As with HasFile(String), but for the predecessor source
	PredecessorHasFilesInDirectory	As with HasFilesInDirectory(String), but for the predecessor source.
	PredecessorHasRegularFile	As with HasRegularFile(String), but for the predecessor source.
	PredecessorReadFile	As with ReadFile, but for the predecessor source.
	PredecessorTryLockFileRegion	As with TryLockFileRegion, but for the predecessor source.
	PredecessorTryUnlockFileRegion	As with TryUnlockFileRegion, but for the predecessor source.
	ReadFile	Gets the contents of the specified file starting at the specified offset and attempts to fill the buffer. If this is an inappropriate action for this source, the request is passed on to the predecessor.
	ToString	Returns a string that represents the current object. (Inherited from Object.)
	TryLockFileRegion	Locks a region of the specified file from the specified offset with the specified length if possible. The region is either entirely locked or entirely unlocked at the end of the operation. If this is an inappropriate action for this source, the request is passed on to the predecessor.
	TryUnlockFileRegion	Unlocks a region of the specified file from the specified offset with the specified length if possible. If this is an inappropriate action for this source, the request is passed on to the predecessor.

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See Also

Reference

LVFS.External Namespace