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1 // Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // DST TZ Database Compiler |
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15 // |
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16 // |
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17 |
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18 #ifndef __PERSISTED_ENTITY_WRAPPER_H |
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19 #define __PERSISTED_ENTITY_WRAPPER_H |
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20 |
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21 #include <windows.h> |
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22 #include <iostream> |
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23 #include <fstream> |
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24 #include "..\..\tz\Server\Include\tzpersisted.h" |
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25 |
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26 //============================================================================ |
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27 // Forward Declarations |
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28 //============================================================================ |
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29 class CTZDocument; |
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30 //============================================================================ |
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31 // CPersistedEntityWrapper class definition |
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32 // Abstract base wrapper class for all the entities. |
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33 // Each specialised wrapper class will be responsible for the behaviour of a |
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34 // persisted entity. |
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35 //============================================================================ |
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36 class CPersistedEntityWrapper |
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37 { |
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38 public: |
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39 CPersistedEntityWrapper(CTZDocument& aDocument); |
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40 virtual ~CPersistedEntityWrapper(); |
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41 |
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42 virtual void ExternaliseL(std::ofstream& aFilestream)=0; |
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43 |
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44 // When a derived class is destroyed, call this on each referenced entity. |
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45 virtual void DecrRefCount() { --iReferenceCount; } |
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46 virtual void IncrRefCount() { ++iReferenceCount; } |
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47 virtual bool IsUnreferenced() { return iReferenceCount==0; } |
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48 virtual TUint16 ReferenceCount() { return iReferenceCount; } |
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49 |
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50 int iOffset; //Reference to the entity in the database |
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51 |
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52 protected: |
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53 CTZDocument& iDocument; |
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54 |
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55 private: |
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56 TUint16 iReferenceCount; //Number of objects referencing this entity |
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57 //If this remains 0 after assembly then |
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58 //this entity will not be persisted. |
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59 }; |
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60 |
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61 //============================================================================ |
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62 // SEntityCheck |
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63 // Used to remove unreferenced entities from the entity tables |
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64 //============================================================================ |
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65 struct SEntityCheck |
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66 { |
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67 TBool operator()(CPersistedEntityWrapper* aEntity) |
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68 { |
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69 bool remove = aEntity->IsUnreferenced(); |
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70 if (remove) |
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71 { |
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72 delete aEntity; |
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73 } |
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74 return remove; |
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75 } |
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76 }; |
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77 |
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78 #endif //__PERSISTED_ENTITY_WRAPPER_H |
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79 //============================================================================ |
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80 // End of file |
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81 //============================================================================ |