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c99ad5d760
Added possibility to inherit existing attributes if the same persistent fields are used. All methods that allow controlling the data model changes or getting some callbacks may be overridden in successor. They may have same GUIDs as a base class or new ones. Special macros IMPLEMENT_DERIVED_ATTRIBUTE and IMPLEMENT_DERIVED_ATTRIBUTE_WITH_TYPE must be used instead of standard Handle macro definition IMPLEMENT_STANDARD_RTTIEXT to register new derived attributes. Using this improvement several existing attributes from TDataStd, TDataXtd and XCAFDoc packages become inherited from other base attribute-classes. XML and Bin drivers of these attributes are removed. New base attribute classes are added: TDataStd_GenericEmpty and TDataStd_GenericExtString. This improvement does not change both present formats Bin and XML documents. The obsolete Standard scheme is not changed at all.
136 lines
4.6 KiB
C++
136 lines
4.6 KiB
C++
// Created on: 2001-09-26
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// Created by: Julia DOROVSKIKH
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// Copyright (c) 2001-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#include <XmlMDF_ADriverTable.hxx>
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#include <Message_Messenger.hxx>
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#include <TDF_DerivedAttribute.hxx>
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#include <TDF_AttributeList.hxx>
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#include <XmlMDF_ADriver.hxx>
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#include <XmlMDF_DerivedDriver.hxx>
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IMPLEMENT_STANDARD_RTTIEXT(XmlMDF_ADriverTable,Standard_Transient)
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//=======================================================================
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//function : MDF_ADriverTable
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//purpose :
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//=======================================================================
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XmlMDF_ADriverTable::XmlMDF_ADriverTable()
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{}
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//=======================================================================
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//function : AddDriver
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//purpose :
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//=======================================================================
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void XmlMDF_ADriverTable::AddDriver (const Handle(XmlMDF_ADriver)& anHDriver)
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{
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const Handle(Standard_Type)& type = anHDriver->SourceType();
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// to make possible for applications to redefine standard attribute drivers
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myMap.UnBind(type);
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myMap.Bind(type,anHDriver);
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}
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//=======================================================================
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//function : AddDerivedDriver
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//purpose :
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//=======================================================================
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void XmlMDF_ADriverTable::AddDerivedDriver (const Handle(TDF_Attribute)& theInstance)
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{
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const Handle(Standard_Type)& anInstanceType = theInstance->DynamicType();
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if (!myMap.IsBound (anInstanceType)) // no direct driver, use a derived one
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{
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for (Handle(Standard_Type) aType = anInstanceType->Parent(); !aType.IsNull(); aType = aType->Parent())
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{
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if (myMap.IsBound (aType))
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{
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Handle(XmlMDF_ADriver) aDriver = new XmlMDF_DerivedDriver (theInstance, myMap (aType));
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myMap.Bind (anInstanceType, aDriver);
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return;
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}
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}
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}
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}
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//=======================================================================
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//function : AddDerivedDriver
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//purpose :
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//=======================================================================
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const Handle(Standard_Type)& XmlMDF_ADriverTable::AddDerivedDriver (Standard_CString theDerivedType)
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{
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if (Handle(TDF_Attribute) anInstance = TDF_DerivedAttribute::Attribute (theDerivedType))
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{
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AddDerivedDriver (anInstance);
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return anInstance->DynamicType();
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}
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static const Handle(Standard_Type) aNullType;
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return aNullType;
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}
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//=======================================================================
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//function : GetDriver
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//purpose :
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//=======================================================================
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Standard_Boolean XmlMDF_ADriverTable::GetDriver
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(const Handle(Standard_Type)& aType,
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Handle(XmlMDF_ADriver)& anHDriver)
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{
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if (!myMap.IsBound (aType)) // try to assign driver for derived type
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{
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AddDerivedDriver (aType->Name());
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}
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if (myMap.IsBound(aType))
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{
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anHDriver = myMap.Find(aType);
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return Standard_True;
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}
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return Standard_False;
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}
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//=======================================================================
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//function : CreateDrvMap
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//purpose :
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//=======================================================================
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void XmlMDF_ADriverTable::CreateDrvMap (XmlMDF_MapOfDriver& theDriverMap)
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{
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// add derived drivers not yet registered in the map
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TDF_AttributeList aDerived;
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TDF_DerivedAttribute::Attributes (aDerived);
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for (TDF_AttributeList::Iterator aDerIter (aDerived); aDerIter.More(); aDerIter.Next())
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{
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if (!myMap.IsBound (aDerIter.Value()->DynamicType()))
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{
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AddDerivedDriver (aDerIter.Value());
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}
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}
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// put everything to the map
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for (XmlMDF_DataMapIteratorOfTypeADriverMap anIter (myMap); anIter.More(); anIter.Next())
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{
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const Handle(XmlMDF_ADriver)& aDriver = anIter.Value();
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const TCollection_AsciiString aTypeName = aDriver->TypeName();
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if (!theDriverMap.IsBound (aTypeName))
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{
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theDriverMap.Bind (aTypeName, aDriver);
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}
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else
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{
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aDriver->MessageDriver()->Send (TCollection_AsciiString ("Warning: skipped driver name: \"")
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+ aTypeName + "\"", Message_Warning);
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}
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}
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}
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