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 // Created on: 1997-08-07
 // Created by: Jean-Louis Frenkel
 // Copyright (c) 1997-1999 Matra Datavision
 // Copyright (c) 1999-2014 OPEN CASCADE SAS
 //
 // This file is part of Open CASCADE Technology software library.
 //
 // This library is free software; you can redistribute it and/or modify it under
 // the terms of the GNU Lesser General Public License version 2.1 as published
 // by the Free Software Foundation, with special exception defined in the file
 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
 // distribution for complete text of the license and disclaimer of any warranty.
 //
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
 #ifndef _CDF_Application_HeaderFile
 #define _CDF_Application_HeaderFile
 
 #include <TCollection_ExtendedString.hxx>
 #include <PCDM_ReaderStatus.hxx>
 #include <CDF_TypeOfActivation.hxx>
 #include <CDF_MetaDataDriver.hxx>
 #include <CDM_Application.hxx>
 #include <CDM_CanCloseStatus.hxx>
 #include <Standard_IStream.hxx>
 #include <NCollection_IndexedDataMap.hxx>
 
 class Standard_GUID;
 class CDM_Document;
 class PCDM_Reader;
 class CDM_MetaData;
 class PCDM_RetrievalDriver;
 class PCDM_StorageDriver;
 class CDF_Directory;
 class CDF_Application;
 DEFINE_STANDARD_HANDLE(CDF_Application, CDM_Application)
 
 
 class CDF_Application : public CDM_Application
 {
 
 public:
 
   
   //! plugs an application.
   //!
   //! Open is used
   //! - for opening a Document that has been created in an application
   //! - for opening a Document from the database
   //! - for opening a Document from a file.
   //! The Open methods always add the document in the session directory and
   //! calls the virtual Activate method. The document is considered to be
   //! opened until Close is used. To be storable, a document must be
   //! opened by an application since the application resources are
   //! needed to store it.
   Standard_EXPORT static Handle(CDF_Application) Load (const Standard_GUID& aGUID);
 
   //! Constructs an new empty document.
   //! This document will have the specified format.
   //! If InitDocument() is redefined for a specific
   //! application, the new document is handled by the
   //! applicative session.
   Standard_EXPORT virtual void NewDocument(const TCollection_ExtendedString& theFormat, Handle(CDM_Document)& theDoc);
 
   //! Initialize a document for the applicative session.
   //! This virtual function is called by NewDocument
   //! and should be redefined for each specific application.
   Standard_EXPORT virtual void InitDocument(const Handle(CDM_Document)& theDoc) const;
 
   //! puts the document in the current session directory
   //! and calls the virtual method Activate on it.
   Standard_EXPORT void Open (const Handle(CDM_Document)& aDocument);
   
   Standard_EXPORT CDM_CanCloseStatus CanClose (const Handle(CDM_Document)& aDocument);
   
   //! removes the document of the current session directory
   //! and closes the document;
   Standard_EXPORT void Close (const Handle(CDM_Document)& aDocument);
   
   //! This method retrieves a document from the database.
   //! If the Document references other documents which have
   //! been updated, the latest version of these documents will
   //! be used if {UseStorageConfiguration} is Standard_True.
   //! The content of {aFolder}, {aName} and {aVersion} depends on
   //! the Database Manager system. If the DBMS is only based on
   //! the OS, {aFolder} is a directory and {aName} is the name of a
   //! file. In this case the use of the syntax with {aVersion}
   //! has no sense. For example:
   //!
   //! Handle(CDM_Document) theDocument=myApplication->Retrieve("/home/cascade","box.dsg");
   //! If the DBMS is EUCLID/Design Manager, {aFolder}, {aName}
   //! have the form they have in EUCLID/Design Manager. For example:
   //!
   //! Handle(CDM_Document) theDocument=myApplication->Retrieve("|user|cascade","box");
   //!
   //! Since  the version is not specified in  this syntax, the  latest will be used.
   //! A link is kept with the database through an instance of CDM_MetaData
   Standard_EXPORT Handle(CDM_Document) Retrieve
     (const TCollection_ExtendedString& aFolder,
      const TCollection_ExtendedString& aName,
      const Standard_Boolean UseStorageConfiguration = Standard_True,
      const Handle(PCDM_ReaderFilter)& theFilter = Handle(PCDM_ReaderFilter)(),
      const Message_ProgressRange& theRange = Message_ProgressRange());
   
   //! This method retrieves  a  document from the database.
   //! If the  Document references other documents which have
   //! been  updated, the  latest version of  these documents
   //! will    be   used  if   {UseStorageConfiguration}  is
   //! Standard_True.  --  If the DBMS is  only  based on the
   //! OS, this syntax  should not be used.
   //!
   //! If the DBMS is EUCLID/Design Manager, {aFolder}, {aName}
   //! and  {aVersion} have the form they have in
   //! EUCLID/Design Manager. For example:
   //!
   //! Handle(CDM_Document) theDocument=myApplication->Retrieve("|user|cascade","box","2");
   //! A link is kept with the database through an instance
   //! of CDM_MetaData
   Standard_EXPORT Handle(CDM_Document) Retrieve
     (const TCollection_ExtendedString& aFolder, 
      const TCollection_ExtendedString& aName, 
      const TCollection_ExtendedString& aVersion, 
      const Standard_Boolean UseStorageConfiguration = Standard_True,
      const Handle(PCDM_ReaderFilter)& theFilter = Handle(PCDM_ReaderFilter)(),
      const Message_ProgressRange& theRange = Message_ProgressRange());
   
   Standard_EXPORT PCDM_ReaderStatus CanRetrieve (const TCollection_ExtendedString& theFolder,
                                                  const TCollection_ExtendedString& theName,
                                                  const bool theAppendMode);
   
   Standard_EXPORT PCDM_ReaderStatus CanRetrieve (const TCollection_ExtendedString& theFolder,
                                                  const TCollection_ExtendedString& theName,
                                                  const TCollection_ExtendedString& theVersion,
                                                  const bool theAppendMode);
   
   //! Checks  status  after  Retrieve
   PCDM_ReaderStatus GetRetrieveStatus() const { return myRetrievableStatus; }
   
   //! Reads theDocument from standard SEEKABLE stream theIStream,
   //! the stream should support SEEK functionality
   Standard_EXPORT void Read
     (Standard_IStream& theIStream,
      Handle(CDM_Document)& theDocument,
      const Handle(PCDM_ReaderFilter)& theFilter = Handle(PCDM_ReaderFilter)(),
      const Message_ProgressRange& theRange = Message_ProgressRange());
  
   //! Returns instance of read driver for specified format.
   //!
   //! Default implementation uses plugin mechanism to load reader dynamically.
   //! For this to work, application resources should define GUID of
   //! the plugin as value of [Format].RetrievalPlugin, and "Plugin"
   //! resource should define name of plugin library to be loaded as
   //! value of [GUID].Location. Plugin library should provide
   //! method PLUGINFACTORY returning instance of the reader for the
   //! same GUID (see Plugin_Macro.hxx).
   //!
   //! In case if reader is not available, will raise Standard_NoSuchObject
   //! or other exception if raised by plugin loader.
   Standard_EXPORT virtual Handle(PCDM_Reader) ReaderFromFormat (const TCollection_ExtendedString& aFormat);
   
   //! Returns instance of storage driver for specified format.
   //!
   //! Default implementation uses plugin mechanism to load driver dynamically.
   //! For this to work, application resources should define GUID of
   //! the plugin as value of [Format].StoragePlugin, and "Plugin"
   //! resource should define name of plugin library to be loaded as
   //! value of [GUID].Location. Plugin library should provide
   //! method PLUGINFACTORY returning instance of the reader for the
   //! same GUID (see Plugin_Macro.hxx).
   //!
   //! In case if driver is not available, will raise Standard_NoSuchObject
   //! or other exception if raised by plugin loader.
   Standard_EXPORT virtual Handle(PCDM_StorageDriver) WriterFromFormat (const TCollection_ExtendedString& aFormat);
   
   //! try to  retrieve a Format  directly in the  file or in
   //! application   resource  by using   extension. returns
   //! True if found;
   Standard_EXPORT Standard_Boolean Format (const TCollection_ExtendedString& aFileName,
                                            TCollection_ExtendedString& theFormat);
   
   Standard_EXPORT Standard_ExtString DefaultFolder();
   
   Standard_EXPORT Standard_Boolean SetDefaultFolder (const Standard_ExtString aFolder);
 
   //! returns MetaDatdDriver of this application
   Standard_EXPORT Handle(CDF_MetaDataDriver) MetaDataDriver() const;
 
   DEFINE_STANDARD_RTTIEXT(CDF_Application,CDM_Application)
 
   Handle(CDF_MetaDataDriver) myMetaDataDriver;
   Handle(CDF_Directory) myDirectory;
 private:
 
   
   //! Informs the  application that aDocument has  been
   //! activated. A document is activated when it is created or
   //! retrieved.
   //! aTypeOfActivation will be:
   //! - CDF_TOA_New if the document is a new one
   //! (even empty or retrieved from the database for
   //! the first time).
   //! - CDF_TOA_Unchanged if the document was already
   //! retrieved but had no changes since the previous retrieval.
   //! - CDF_TOA_Modified if the document was already
   //! retrieved and modified since the previous retrieval.
   //! You do not need to call <Activate>, but you should  redefine
   //! this method to implement application specific behavior.
   Standard_EXPORT virtual void Activate (const Handle(CDM_Document)& aDocument,
                                          const CDF_TypeOfActivation aTypeOfActivation);
   
   Standard_EXPORT Handle(CDM_Document) Retrieve
     (const Handle(CDM_MetaData)& aMetaData, 
      const Standard_Boolean UseStorageConfiguration, 
      const Handle(PCDM_ReaderFilter)& theFilter = Handle(PCDM_ReaderFilter)(),
      const Message_ProgressRange& theRange = Message_ProgressRange()) Standard_OVERRIDE;
   
   Standard_EXPORT Handle(CDM_Document) Retrieve
     (const Handle(CDM_MetaData)& aMetaData,
      const Standard_Boolean UseStorageConfiguration, 
      const Standard_Boolean IsComponent, 
      const Handle(PCDM_ReaderFilter)& theFilter = Handle(PCDM_ReaderFilter)(),
      const Message_ProgressRange& theRange = Message_ProgressRange());
   
   Standard_EXPORT Standard_Integer DocumentVersion (const Handle(CDM_MetaData)& theMetaData) Standard_OVERRIDE;
   
   Standard_EXPORT CDF_TypeOfActivation TypeOfActivation (const Handle(CDM_MetaData)& aMetaData);
   
   Standard_EXPORT PCDM_ReaderStatus CanRetrieve (const Handle(CDM_MetaData)& aMetaData, const bool theAppendMode);
 
 protected:
 
   Standard_EXPORT CDF_Application();
 
   PCDM_ReaderStatus myRetrievableStatus;
   NCollection_IndexedDataMap<TCollection_ExtendedString, Handle(PCDM_RetrievalDriver)> myReaders;
   NCollection_IndexedDataMap<TCollection_ExtendedString, Handle(PCDM_StorageDriver)> myWriters;
 
 private:
   TCollection_ExtendedString myDefaultFolder;
 };
 
 #endif // _CDF_Application_HeaderFile

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