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<b>class c4_Storage</b>
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Manager for persistent storage of view structures.<br><br>
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<font face=Helvetica size=-1><b>Public members</b></font>
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<b>c4_Storage</b> ();
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Construct streaming-only storage object</font>
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<b>c4_Storage</b> (<A HREF="c4_Strategy.html" >c4_Strategy</A>& strategy_, bool owned_ =false);
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Construct a storage using the specified strategy handler</font>
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<b>c4_Storage</b> (const char* filename_, const char* description_);
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Construct a storage object for given file and format</font>
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<b>c4_Storage</b> (const char* filename_, bool canModify_);
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Construct a storage object, keeping the current structure</font>
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<b>c4_Storage</b> (const <A HREF="c4_Storage.html" >c4_Storage</A>&);
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Copy constructor</font>
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<b>~c4_Storage</b> ();
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Destructor, usually closes file, but does not commit by default</font>
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<A HREF="c4_Storage.html" >c4_Storage</A>&
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<b>operator= </b> (const <A HREF="c4_Storage.html" >c4_Storage</A>&);
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Assignment of storage implements reference semantics</font>
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void
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<b>AutoCommit</b> ();
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Set storage up to always call Commit in the destructor</font>
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<A HREF="c4_RowRef.html" >c4_RowRef</A>
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<b>Contents</b> () <i>const</i>;
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Give access to the stored data as a single row</font>
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<A HREF="c4_Strategy.html" >c4_Strategy</A>&
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<b>Strategy</b> () <i>const</i>;
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Return the strategy object associated with this storage</font>
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c4_HandlerSeq&
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<b>RootTable</b> () <i>const</i>;
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Return the root table entry</font>
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const char*
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<b>Description</b> (const char* name_ =0);
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Return a description of the view structure (default is all)</font>
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bool
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<b>Commit</b> ();
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Flush pending changes to file right now</font>
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bool
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<b>Rollback</b> ();
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(Re)initialize for on-demand loading</font></a>
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<A HREF="c4_ViewRef.html" >c4_ViewRef</A>
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<b>View</b> (const char* name_);
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Get or set a named view in this storage object</font>
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<A HREF="c4_View.html" >c4_View</A>
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<b>GetAs</b> (const char* description_);
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Get a named view, redefining it to match the given structure</font>
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<A HREF="c4_View.html" >c4_View</A>
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<b>Store</b> (const char* name_, const <A HREF="c4_View.html" >c4_View</A>& view_);
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Attach a view using specified name in this storage object</font>
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void
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<b>LoadFrom</b> (<A HREF="c4_Stream.html" >c4_Stream</A>& stream_);
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Load contents from the specified input stream</font>
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void
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<b>SaveTo</b> (<A HREF="c4_Stream.html" >c4_Stream</A>& stream_);
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Save contents to the specified output stream</font>
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<font face=Helvetica size=-1><b>Header file</b></font>
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"mk4.h" -- Dec 9, 1999
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