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1 | // Copyright (c) 2015 OPEN CASCADE SAS |
2 | // |
3 | // This file is part of Open CASCADE Technology software library. |
4 | // |
5 | // This library is free software; you can redistribute it and/or modify it under |
6 | // the terms of the GNU Lesser General Public License version 2.1 as published |
7 | // by the Free Software Foundation, with special exception defined in the file |
8 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
9 | // distribution for complete text of the license and disclaimer of any warranty. |
10 | // |
11 | // Alternatively, this file may be used under the terms of Open CASCADE |
12 | // commercial license or contractual agreement. |
13 | |
14 | #ifndef _StdObjMgt_ReadData_HeaderFile |
15 | #define _StdObjMgt_ReadData_HeaderFile |
16 | |
17 | #include <Standard.hxx> |
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18 | #include <Storage_BaseDriver.hxx> |
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19 | #include <NCollection_Array1.hxx> |
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20 | |
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21 | class StdObjMgt_Persistent; |
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22 | class Standard_GUID; |
23 | |
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24 | |
25 | //! Auxiliary data used to read persistent objects from a file. |
26 | class StdObjMgt_ReadData |
27 | { |
28 | public: |
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29 | //! Auxiliary class used to automate begin and end of |
30 | //! reading object (eating opening and closing parenthesis) |
31 | //! at constructor and destructor |
32 | class ObjectSentry |
33 | { |
34 | public: |
35 | explicit ObjectSentry (StdObjMgt_ReadData& theData) : myReadData (&theData) |
36 | { myReadData->myDriver->BeginReadObjectData(); } |
37 | |
38 | ~ObjectSentry () |
39 | { myReadData->myDriver->EndReadObjectData(); } |
40 | |
41 | private: |
42 | StdObjMgt_ReadData* myReadData; |
43 | |
44 | ObjectSentry (const ObjectSentry&); |
45 | ObjectSentry& operator = (const ObjectSentry&); |
46 | }; |
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47 | |
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48 | Standard_EXPORT StdObjMgt_ReadData |
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49 | (const Handle(Storage_BaseDriver)& theDriver, const Standard_Integer theNumberOfObjects); |
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50 | |
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51 | template <class Instantiator> |
52 | void CreatePersistentObject |
53 | (const Standard_Integer theRef, Instantiator theInstantiator) |
54 | { myPersistentObjects (theRef) = theInstantiator(); } |
55 | |
56 | Standard_EXPORT void ReadPersistentObject |
57 | (const Standard_Integer theRef); |
58 | |
59 | Handle(StdObjMgt_Persistent) PersistentObject |
60 | (const Standard_Integer theRef) const |
61 | { return myPersistentObjects (theRef); } |
62 | |
63 | Standard_EXPORT Handle(StdObjMgt_Persistent) ReadReference(); |
64 | |
65 | template <class Persistent> |
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66 | StdObjMgt_ReadData& operator >> (Handle(Persistent)& theTarget) |
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67 | { |
68 | theTarget = Handle(Persistent)::DownCast (ReadReference()); |
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69 | return *this; |
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70 | } |
71 | |
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72 | StdObjMgt_ReadData& operator >> (Handle(StdObjMgt_Persistent)& theTarget) |
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73 | { |
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74 | theTarget = ReadReference(); |
75 | return *this; |
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76 | } |
77 | |
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78 | template <class Type> |
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79 | StdObjMgt_ReadData& ReadValue (Type& theValue) |
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80 | { |
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81 | *myDriver >> theValue; |
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82 | return *this; |
83 | } |
84 | |
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85 | StdObjMgt_ReadData& operator >> (Standard_Character& theValue) |
86 | { return ReadValue (theValue); } |
87 | |
88 | StdObjMgt_ReadData& operator >> (Standard_ExtCharacter& theValue) |
89 | { return ReadValue (theValue); } |
90 | |
91 | StdObjMgt_ReadData& operator >> (Standard_Integer& theValue) |
92 | { return ReadValue (theValue); } |
93 | |
94 | StdObjMgt_ReadData& operator >> (Standard_Boolean& theValue) |
95 | { return ReadValue (theValue); } |
96 | |
97 | StdObjMgt_ReadData& operator >> (Standard_Real& theValue) |
98 | { return ReadValue (theValue); } |
99 | |
100 | StdObjMgt_ReadData& operator >> (Standard_ShortReal& theValue) |
101 | { return ReadValue (theValue); } |
102 | |
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103 | private: |
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104 | Handle(Storage_BaseDriver) myDriver; |
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105 | NCollection_Array1<Handle(StdObjMgt_Persistent)> myPersistentObjects; |
106 | }; |
107 | |
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108 | Standard_EXPORT StdObjMgt_ReadData& operator >> |
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109 | (StdObjMgt_ReadData& theReadData, Standard_GUID& theGUID); |
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110 | |
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111 | #endif // _StdObjMgt_ReadData_HeaderFile |