    indexing
    	description: "implementation of IStorage interface"
    	legal: "See notice at end of class."
    	status: "See notice at end of class."
    	date: "$Date: 2006-04-25 12:20:02 -0700 (Tue, 25 Apr 2006) $"
    	revision: "$Revision: 58453 $"

    class interface
    	ECOM_STORAGE

    create
    	make_new_doc_file (filename: FILE_NAME; a_mode: INTEGER_32)
    			-- Create new compound file with path `filename'
    			-- and mode `a_mode' in file system.
    			-- See class ECOM_STGM for mode values.
    		require
    			valid_filename: filename /= Void
    			valid_mode: is_valid_stgm (a_mode)
    		ensure
    			compound_file_created: exists

    	make_temporary_doc_file (a_mode: INTEGER_32)
    			-- Create temporary compound file with mode mode
    			-- See class ECOM_STGM for `a_mode' values.
    		require
    			valid_mode: is_valid_stgm (a_mode)
    		ensure
    			compound_file_created: exists

    	make_open_file (filename: FILE_NAME; a_mode: INTEGER_32)
    			-- Open existing root compound file with path `filename'
    			-- and mode mode in file system.
    			-- excluding block pointed by `exclude' (can be default_pointer)
    			-- See class ECOM_STGM for `a_mode' values.
    		require
    			valid_file: filename /= Void and then is_compound_file (filename)
    			valid_mode: is_valid_stgm (a_mode)
    		ensure
    			compound_file_open: exists

    	make_from_other (other: ECOM_INTERFACE)
    			-- Make from other Queriable.
    			-- (from ECOM_QUERIABLE)
    		require -- from ECOM_QUERIABLE
    			non_void_other: other /= Void
    		ensure -- from ECOM_QUERIABLE
    			valid_initializer: initializer /= default_pointer
    			exists: exists

    	make_from_pointer (cpp_obj: POINTER)
    			-- Make from pointer
    		require -- from ECOM_QUERIABLE
    			non_default_pointer: cpp_obj /= default_pointer
    		ensure -- from ECOM_QUERIABLE
    			valid_initializer: initializer /= default_pointer
    			exists: exists

    feature -- Access

    	access_time: WEL_FILE_TIME
    			-- Access time

    	class_id: POINTER
    			-- Class identifier

    	creation_time: WEL_FILE_TIME
    			-- Creation time

    	element_access_time (a_name: STRING_8): WEL_FILE_TIME
    			-- Access time of element `a_name'
    		require
    			non_void_name: a_name /= Void
    			valid_name: is_valid_name (a_name)
    		ensure
    			non_void_access_time: Result /= Void

    	element_creation_time (a_name: STRING_8): WEL_FILE_TIME
    			-- Creation time of element `a_name'
    		require
    			non_void_name: a_name /= Void
    			valid_name: is_valid_name (a_name)
    		ensure
    			non_void_creation_time: Result /= Void

    	element_modification_time (a_name: STRING_8): WEL_FILE_TIME
    			-- Modification time of element `a_name'
    		require
    			non_void_name: a_name /= Void
    			valid_name: is_valid_name (a_name)
    		ensure
    			non_void_modification_time: Result /= Void

    	elements: ECOM_ENUM_STATSTG
    			-- Substorages and substreams enumerator
    		ensure
    			Result /= Void

    	exists: BOOLEAN
    			-- Is wrapped structure initialized?
    			-- (from ECOM_QUERIABLE)

    	generating_type: STRING_8
    			-- Name of current object's generating type
    			-- (type of which it is a direct instance)
    			-- (from ANY)

    	generator: STRING_8
    			-- Name of current object's generating class
    			-- (base class of the type of which it is a direct instance)
    			-- (from ANY)

    	is_same_name (a_name: STRING_8): BOOLEAN
    			-- is `a_name' equal to name of Current storage

    	is_valid_name (a_name: STRING_8): BOOLEAN
    			-- is object with name `a_name'
    			-- part of Current storage
    		require
    			valid_name: a_name /= Void

    	is_valid_stat_flag (flag: INTEGER_32): BOOLEAN
    			-- Is `flag' a valid stat flag?
    			-- (from ECOM_STAT_FLAGS)

    	is_valid_stgc (stgc: INTEGER_32): BOOLEAN
    			-- Is `stgc' a valid storage commit mode flag?
    			-- (from ECOM_STGC)

    	is_valid_stgm (stgm: INTEGER_32): BOOLEAN
    			-- Is `stgm' a valid storage mode flag?
    			-- (from ECOM_STGM)

    	is_valid_stgmove (stgmove: INTEGER_32): BOOLEAN
    			-- Is `stgmove' a valid storage move flag?
    			-- (from ECOM_STGMOVE)

    	item: POINTER
    			-- Pointer to COM object wrapper.
    			-- (from ECOM_QUERIABLE)

    	mode: INTEGER_32
    			-- Access mode

    	modification_time: WEL_FILE_TIME
    			-- Modufication time

    	name: STRING_8
    			-- Name

    	new_stream (a_name: STRING_8; a_mode: INTEGER_32): ECOM_STREAM
    			-- Newly created stream with name `a_name'
    			-- and mode `a_mode' nested within Current storage
    			-- Opening the same stream more than once from the
    			-- same storage is not supported.
    			-- STGM_SHARE_EXCLUSIVE flag must be specified.
    		require
    			non_void_storage_name: a_name /= Void
    			valid_storage_name: not a_name.is_empty
    			valid_mode: is_valid_stgm (a_mode)
    		ensure
    			non_void_stream: Result /= Void
    			valid_stream: Result.exists

    	new_substorage (a_name: STRING_8; a_mode: INTEGER_32): ECOM_STORAGE
    			-- Newly created storage with name `a_name'
    			-- and mode `a_mode'
    			-- nested within Current storage
    		require
    			non_void_storage_name: a_name /= Void
    			valid_storage_name: not a_name.is_empty
    			valid_mode: is_valid_stgm (a_mode)
    		ensure
    			non_void_storage: Result /= Void
    			valid_storage: Result.exists

    	retrieved_stream (a_name: STRING_8; a_mode: INTEGER_32): ECOM_STREAM
    			-- Retrieved nested stream with name `a_name'
    			-- and mode `a_mode'
    			-- same storage is not supported.
    			-- STGM_SHARE_EXCLUSIVE flag must be specified.
    		require
    			non_void_name: a_name /= Void
    			valid_name: is_valid_name (a_name)
    			valid_mode: is_valid_stgm (a_mode)
    		ensure
    			non_void_stream: Result /= Void
    			valid_stream: Result.exists

    	retrieved_substorage (a_name: STRING_8; a_mode: INTEGER_32): ECOM_STORAGE
    			-- Retrieved storage with name `a_name' and mode `a_mode'
    			-- nested within Current storage
    			-- Opening the same storage object more than once from the same
    			-- parent storage is not supported.
    			-- STGM_SHARE_EXCLUSIVE flag must be specified.
    		require
    			non_void_name: a_name /= Void
    			valid_name: is_valid_name (a_name)
    			valid_mode: is_valid_stgm (a_mode)
    		ensure
    			non_void_storage: Result /= Void
    			valid_storage: Result.exists

    	root_storage: ECOM_ROOT_STORAGE
    			-- IRootStorage interface

    	statflag_default: INTEGER_32
    			-- Indicate that this is not used for property
    			-- (from ECOM_STAT_FLAGS)

    	statflag_noname: INTEGER_32
    			-- Indicate that this is not used for property
    			-- (from ECOM_STAT_FLAGS)

    	stgc_dangerouslycommitmerelytodiskcache: INTEGER_32
    			-- EOLE_STGC_DANGEROUSLYCOMMITMERELYTODISKCACHE commits the changes,
    			-- but does not save them to the disk cache.
    			-- (from ECOM_STGC)

    	stgc_default: INTEGER_32
    			-- OLE 2 default commit mode
    			-- (from ECOM_STGC)

    	stgc_onlyifcurrent: INTEGER_32
    			-- EOLE_STGC_ONLYIFCURRENT prevents multiple users of an IStorage
    			-- from overwriting the other's changes. EOLE_STGC_ONLYIFCURRENT
    			-- commits changes only if no one else has made changes since the
    			-- last time this user opened the IStorage or committed. If other
    			-- changes have been made, EOLE_STG_E_NOTCURRENT is returned.
    			-- If the caller chooses to overwrite the changes, IStorage.Commit
    			-- can be called with commit mode set to EOLE_STGC_DEFAULT.
    			-- (from ECOM_STGC)

    	stgc_overwrite: INTEGER_32
    			-- EOLE_STGC_OVERWRITE allows new data to overwrite the old data,
    			-- reducing space requirements. EOLE_STGC_OVERWRITE is not recommended
    			-- for usual operation, but it could be useful in the following
    			-- situations:
    			--    1. A commit was tried and EOLE_STG_E_MEDIUMFULL was returned.
    			--    2. The user has somehow specified a willingness to risk
    			--       overwriting the old data.
    			--    3. A low-memory save sequence is being used to end up with a
    			--       smaller file.
    			-- The commit operation obtains all the disk space it needs before
    			-- attempting to store the new data, whether or not EOLE_STGC_OVERWRITE
    			-- is specified. If space requirements prohibit the save, the old
    			-- data will be intact, including all uncommitted changes. However,
    			-- if the commit fails due to reasons other than lack of disk space
    			-- and EOLE_STGC_OVERWRITE was specified, it is possible that neither
    			-- the old nor the new version of the data will be intact.
    			-- (from ECOM_STGC)

    	stgm_convert: INTEGER_32
    			-- This flag is applicable only to the creation of IStorage objects.
    			-- Stgm_convert allows the creation to proceed while preserving
    			-- existing data. The old data is saved to a stream named CONTENTS
    			-- containing the same data that was in the old IStorage or IStream
    			-- instance. In the IStorage case, the data is flattened to a
    			-- stream regardless of whether the existing file currently contains
    			-- a layered storage object.
    			-- (from ECOM_STGM)

    	stgm_create: INTEGER_32
    			-- Stgm_create indicates an existing IStorage or IStream object
    			-- should be removed before the new one replaces it. A new object
    			-- is created when this flag is specified only if the existing
    			-- IStorage or IStream has been successfully removed.
    			-- (from ECOM_STGM)

    	stgm_deleteonrelease: INTEGER_32
    			-- The Stgm_deleteonrelease flag indicates that the underlying
    			-- file is to be automatically destroyed when the root IStorage
    			-- object is released. This capability is most useful for
    			-- creating temporary files.
    			-- (from ECOM_STGM)

    	stgm_direct: INTEGER_32
    			-- Stgm_DIrect is always specified for IStream objects.
    			-- Stgm_transacted is not supported in the compound file
    			-- implementation of IStream. Other implementations can choose
    			-- to support it.
    			-- (from ECOM_STGM)

    	stgm_failifthere: INTEGER_32
    			-- Stgm_failifthere causes the create operation to fail if an
    			-- existing object with the specified name exists. In this case,
    			-- Stg_e_filealreadyexists is returned. Stgm_failifthere
    			-- applies to both IStorage and IStream objects.
    			-- (from ECOM_STGM)

    	stgm_priority: INTEGER_32
    			-- The Stgm_priority flag allows an IStorage object to be opened
    			-- so that a subsequent copy operation can be done at reduced cost.
    			-- Stgm_priority allows an application to read certain streams
    			-- from storage before opening the storage object in a mode that would
    			-- require a snapshot copy to be made. Priority mode has exclusive
    			-- access to the committed version of the IStorage object.
    			-- While a compound file is open in priority mode, no other opening
    			-- of the compound file can commit changes even one that was opened
    			-- before the priority mode opening. Therefore, applications should
    			-- keep IStorage objects open in priority mode for as short a time
    			-- as possible.
    			-- (from ECOM_STGM)

    	stgm_read: INTEGER_32
    			-- When applied to an IStream object, Stgm_READ enables
    			-- applications to successfully call IStream.Read. If Stgm_read
    			-- is omitted, IStream.Read will return an error. When applied to an
    			-- IStorage, Stgm_READ allows the enumeration of the storage
    			-- object's elements and enables applications to open these elements
    			-- in read mode. Parents of storage objects to be opened in read mode
    			-- must also have been opened in read mode otherwise, an error is
    			-- returned.
    			-- (from ECOM_STGM)

    	stgm_readwrite: INTEGER_32
    			-- Stgm_readwrite is the logical combination of the
    			-- Stgm_read and Stgm_write. However, the defined value
    			-- of Stgm_readwrite is not equal to
    			-- (Stgm_read or Stgm_write).
    			-- (from ECOM_STGM)

    	stgm_share_deny_none: INTEGER_32
    			-- 0x00000040L
    			-- Stgm_SHARE_DENY_NONE indicates that neither read access nor
    			-- write access should be denied to subsequent openings. This is the
    			-- default sharing mode and if no Stgm_SHARE_* flag is explicitly
    			-- given, Stgm_SHARE_DENY_NONE is implied.
    			-- (from ECOM_STGM)

    	stgm_share_deny_read: INTEGER_32
    			-- 0x00000030L
    			-- When successfully applied to a root IStorage, the
    			-- Stgm_SHARE_DENY_READ flag prevents others from opening the
    			-- object in read mode. The open call fails and returns an error if
    			-- the object is presently open in deny-read mode.
    			-- Stgm_SHARE_DENY_READ is most useful when opening root storage
    			-- objects. Deny modes on inner elements are still useful if some
    			-- component is coordinating the opening of these inner elements, as
    			-- might happen in a Copy/Paste operation. However, inner elements
    			-- always require Stgm_SHARE_EXCLUSIVE. Opening a parent storage
    			-- object with Stgm_SHARE_DENY_READ applies only to that opening,
    			-- not the network-wide set of openings of the parent.
    			-- (from ECOM_STGM)

    	stgm_share_deny_write: INTEGER_32
    			-- When successfully applied the Stgm_share_deny_write flag
    			-- prevents subsequent openings of either a storage or a stream from
    			-- specifying write mode. The open call fails and returns an error
    			-- if the storage or stream is presently open in write mode.
    			-- For information about the interaction of this flag with nested
    			-- openings, see the earlier discussion about Stgm_share_deny_read.
    			-- (from ECOM_STGM)

    	stgm_share_exclusive: INTEGER_32
    			-- The compound files implementation requires that all inner elements
    			-- be opened Stgm_share_exclusive. It is the logical combination
    			-- of the Stgm_share_deny_read and Stgm_share_deny_write.
    			-- All root storage objects, as well as child storage and stream
    			-- objects must be opened with Stgm_share_exclusive.
    			-- (from ECOM_STGM)

    	stgm_transacted: INTEGER_32
    			-- The transaction for each open object is nested in the transaction
    			-- for its parent storage object. Therefore, committing changes at the
    			-- child level is dependent on committing changes in the parent and
    			-- a commit of the root storage object (top-level parent) is necessary
    			-- before changes to an object are actually written to disk.
    			-- The changes percolate upward: inner objects publish changes to the
    			-- transaction of the next object outwards. Outermost objects publish
    			-- changes permanently into the file system. Transacted mode is not
    			-- required on the parent storage object in order to use transacted
    			-- mode on a contained object.The scope of changes that are buffered
    			-- in transacted mode is very broad. A storage or stream object can
    			-- be opened, have arbitrary changes made to it, and then have the
    			-- changes reverted, preserving the object as it was when it was
    			-- first opened. The creation and destruction of elements within a
    			-- storage object are scoped by its transaction.
    			-- (from ECOM_STGM)

    	stgm_write: INTEGER_32
    			-- Stgm_write lets an object commit changes to the storage.
    			-- Specifically, unless this flag has been given, IStorage.Commit
    			-- and IStream.Commit will fail. An open object whose changes cannot
    			-- be committed can save its changes by copying the storage or stream
    			-- with IStorage.CopyTo or IStream.CopyTo. In direct mode,
    			-- changes are committed after every change operation. Thus, write
    			-- permissions are needed to call any function that causes a change.
    			-- On streams, this includes IStream.Write and IStream.SetSize.
    			-- If a parent storage is opened in direct mode without write
    			-- permission, any attempt to open a child stream within it in direct
    			-- mode with write permission will fail, because it causes an implicit
    			-- commit to be made on the storage. Similarly, trying to create or
    			-- destroy a contained element in this storage object also causes an
    			-- implicit commit, resulting in an error.
    			-- (from ECOM_STGM)

    	stgmove_copy: INTEGER_32
    			-- Carry out the first part of the move operation but do
    			-- not remove the original element.
    			-- (from ECOM_STGMOVE)

    	stgmove_move: INTEGER_32
    			-- Carry out the move operation, as expected.
    			-- (from ECOM_STGMOVE)

    feature -- Access
    --	com_api: ECOM_COM is
    --		once
    --			create Result
    --		end

    	guid_routines: ECOM_GUID_ROUTINES
    			-- (from ECOM_ROUTINES)

    feature -- Comparison

    	frozen deep_equal (some: ANY; other: like arg #1): BOOLEAN
    			-- Are `some' and `other' either both void
    			-- or attached to isomorphic object structures?
    			-- (from ANY)
    		ensure -- from ANY
    			shallow_implies_deep: standard_equal (some, other) implies Result
    			both_or_none_void: (some = Void) implies (Result = (other = Void))
    			same_type: (Result and (some /= Void)) implies some.same_type (other)
    			symmetric: Result implies deep_equal (other, some)

    	frozen equal (some: ANY; other: like arg #1): BOOLEAN
    			-- Are `some' and `other' either both void or attached
    			-- to objects considered equal?
    			-- (from ANY)
    		ensure -- from ANY
    			definition: Result = (some = Void and other = Void) or else ((some /= Void and other /= Void) and then some.is_equal (other))

    	is_equal (other: like Current): BOOLEAN
    			-- Is `other' attached to an object considered
    			-- equal to current object?
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    		ensure -- from ANY
    			symmetric: Result implies other.is_equal (Current)
    			consistent: standard_is_equal (other) implies Result

    	frozen standard_equal (some: ANY; other: like arg #1): BOOLEAN
    			-- Are `some' and `other' either both void or attached to
    			-- field-by-field identical objects of the same type?
    			-- Always uses default object comparison criterion.
    			-- (from ANY)
    		ensure -- from ANY
    			definition: Result = (some = Void and other = Void) or else ((some /= Void and other /= Void) and then some.standard_is_equal (other))

    	frozen standard_is_equal (other: like Current): BOOLEAN
    			-- Is `other' attached to an object of the same type
    			-- as current object, and field-by-field identical to it?
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    		ensure -- from ANY
    			same_type: Result implies same_type (other)
    			symmetric: Result implies other.standard_is_equal (Current)

    feature -- Status report

    	conforms_to (other: ANY): BOOLEAN
    			-- Does type of current object conform to type
    			-- of `other' (as per Eiffel: The Language, chapter 13)?
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void

    	same_type (other: ANY): BOOLEAN
    			-- Is type of current object identical to type of `other'?
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    		ensure -- from ANY
    			definition: Result = (conforms_to (other) and other.conforms_to (Current))

    feature -- Duplication

    	copy (other: like Current)
    			-- Update current object using fields of object attached
    			-- to `other', so as to yield equal objects.
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    			type_identity: same_type (other)
    		ensure -- from ANY
    			is_equal: is_equal (other)

    	frozen deep_copy (other: like Current)
    			-- Effect equivalent to that of:
    			--		copy (`other' . deep_twin)
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    		ensure -- from ANY
    			deep_equal: deep_equal (Current, other)

    	frozen deep_twin: like Current
    			-- New object structure recursively duplicated from Current.
    			-- (from ANY)
    		ensure -- from ANY
    			deep_equal: deep_equal (Current, Result)

    	frozen standard_copy (other: like Current)
    			-- Copy every field of `other' onto corresponding field
    			-- of current object.
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    			type_identity: same_type (other)
    		ensure -- from ANY
    			is_standard_equal: standard_is_equal (other)

    	frozen standard_twin: like Current
    			-- New object field-by-field identical to `other'.
    			-- Always uses default copying semantics.
    			-- (from ANY)
    		ensure -- from ANY
    			standard_twin_not_void: Result /= Void
    			equal: standard_equal (Result, Current)

    	frozen twin: like Current
    			-- New object equal to `Current'
    			-- twin calls copy; to change copying/twining semantics, redefine copy.
    			-- (from ANY)
    		ensure -- from ANY
    			twin_not_void: Result /= Void
    			is_equal: Result.is_equal (Current)

    feature -- Basic operations

    	frozen default: like Current
    			-- Default value of object's type
    			-- (from ANY)

    	frozen default_pointer: POINTER
    			-- Default value of type `POINTER'
    			-- (Avoid the need to write `p'.default for
    			-- some `p' of type `POINTER'.)
    			-- (from ANY)

    	default_rescue
    			-- Process exception for routines with no Rescue clause.
    			-- (Default: do nothing.)
    			-- (from ANY)

    	frozen do_nothing
    			-- Execute a null action.
    			-- (from ANY)

    feature -- Basic Operations

    	commit (a_flags: INTEGER_32)
    			-- Commit any changes.
    			-- Notify parent storage.
    		require
    			valid_flags: is_valid_stgc (a_flags)

    	copy_all_to (dest_storage: ECOM_STORAGE)
    			-- Copy entire contents to `dest_storage'.
    		require
    			non_void_destination: dest_storage /= Void
    			valid_destination: dest_storage.exists

    	destroy_element (a_name: STRING_8)
    			-- Remove element with name `a_name' from storage.
    		require
    			non_void_name: a_name /= Void
    			valid_name: is_valid_name (a_name)
    		ensure
    			element_removed: not is_valid_name (a_name)

    	is_compound_file (a_name: STRING_8): BOOLEAN
    			-- Does file `a_name' contain a storage object?
    			-- (from ECOM_STORAGE_ROUTINES)

    	rename_element (old_name: STRING_8; new_name: STRING_8)
    			-- Rename element `old_name' into `new_name'
    		require
    			non_void_old_name: old_name /= Void
    			valid_old_name: is_valid_name (old_name)
    			non_void_new_name: new_name /= Void
    			valid_new_name: is_valid_name (new_name)
    		ensure
    			not_valid_old_name: not is_valid_name (old_name)
    			valid_new_name: is_valid_name (new_name)

    	revert
    			-- Discard all changes made to storage object
    			-- since the last commit

    feature -- Element Change

    	move_element_to (a_element_name: STRING_8; dest_storage: ECOM_STORAGE; new_name: STRING_8; a_mode: INTEGER_32)
    			-- Copy or move (depending on mode) element `a_element_name'
    			-- of root storage to `dest_storage'.
    			-- Create new element in `dest_storage' with `new_name'.
    			-- See class ECOM_STGM for `a_mode' values.
    			-- Before calling this method, the element to be moved must
    			-- be closed, and the destination storage must be open.
    		require
    			non_void_element_name: a_element_name /= Void
    			valid_element_name: is_valid_name (a_element_name)
    			non_void_dest_storage: dest_storage /= Void
    			valid_dest_storage: dest_storage.exists
    			non_void_new_name: new_name /= Void
    			valid_new_name: not new_name.is_empty
    			valid_mode: is_valid_stgmove (a_mode)
    		ensure
    			element_moved: dest_storage.is_valid_name (new_name)

    	set_access_time (an_access_time: WEL_FILE_TIME)
    			-- Set access time with `an_access_time'.
    		require
    			non_void_access_time: an_access_time /= Void
    		ensure
    			access_time_set: access_time.is_equal (an_access_time)

    	set_class (a_class_id: POINTER)
    			-- Associate storage with COM component with class id `a_class-id'
    		require
    			valid_clsid: a_class_id /= default_pointer

    	set_creation_time (a_creation_time: WEL_FILE_TIME)
    			-- Set creation time with creation_time.
    		require
    			non_void_creation_time: a_creation_time /= Void
    		ensure
    			creation_time_set: creation_time.is_equal (a_creation_time)

    	set_element_access_time (a_element_name: STRING_8; an_access_time: WEL_FILE_TIME)
    			-- Set access time of element `a_element_name' with `an_access_time'.
    		require
    			non_void_element_name: a_element_name /= Void
    			valid_element_name: is_valid_name (a_element_name)
    			valid_access_time: an_access_time /= Void
    		ensure
    			element_access_time_set: element_access_time (a_element_name).is_equal (an_access_time)

    	set_element_creation_time (a_element_name: STRING_8; a_creation_time: WEL_FILE_TIME)
    			-- Set creation time of element `a_element_name' with `a_creation_time'.
    		require
    			non_void_element_name: a_element_name /= Void
    			valid_element_name: is_valid_name (a_element_name)
    			valid_creation_time: a_creation_time /= Void
    		ensure
    			element_creation_time_set: element_creation_time (a_element_name).is_equal (a_creation_time)

    	set_element_modification_time (a_element_name: STRING_8; a_modification_time: WEL_FILE_TIME)
    			-- Set modification time of element `a_element_name' with `a_modification_time'.
    		require
    			non_void_element_name: a_element_name /= Void
    			valid_element_name: is_valid_name (a_element_name)
    			valid_modification_time: a_modification_time /= Void
    		ensure
    			element_access_time_set: element_modification_time (a_element_name).is_equal (a_modification_time)

    	set_modification_time (a_modification_time: WEL_FILE_TIME)
    			-- Set modification time with `a_modification_time'.
    		require
    			non_void_modification_time: a_modification_time /= Void
    		ensure
    			modification_time_set: modification_time.is_equal (a_modification_time)

    feature -- Output

    	io: STD_FILES
    			-- Handle to standard file setup
    			-- (from ANY)

    	out: STRING_8
    			-- New string containing terse printable representation
    			-- of current object
    			-- Was declared in ANY as synonym of tagged_out.
    			-- (from ANY)

    	print (some: ANY)
    			-- Write terse external representation of `some'
    			-- on standard output.
    			-- (from ANY)

    	frozen tagged_out: STRING_8
    			-- New string containing terse printable representation
    			-- of current object
    			-- Was declared in ANY as synonym of out.
    			-- (from ANY)

    feature -- Platform

    	operating_environment: OPERATING_ENVIRONMENT
    			-- Objects available from the operating system
    			-- (from ANY)

    invariant
    		-- from ECOM_QUERIABLE
    	queriable_invariant: initializer /= default_pointer and then exists

    		-- from ANY
    	reflexive_equality: standard_is_equal (Current)
    	reflexive_conformance: conforms_to (Current)

    indexing
    	copyright: "Copyright (c) 1984-2006, Eiffel Software and others"
    	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
    	source: "[
    		Eiffel Software
    		356 Storke Road, Goleta, CA 93117 USA
    		Telephone 805-685-1006, Fax 805-685-6869
    		Website http://www.eiffel.com
    		Customer support http://support.eiffel.com
    	]"

    end -- class ECOM_STORAGE