眾所周知，boost里面有一個(gè)Serialization。不過(guò)我這個(gè)跟boost的有本質(zhì)上的差別。boost的Serialization是通過(guò)重載操作符將一個(gè)對(duì)象與一個(gè)流進(jìn)行讀寫(xiě)，而我則
通過(guò)記錄類的成員變量來(lái)自動(dòng)產(chǎn)生相應(yīng)的讀寫(xiě)動(dòng)作。
不過(guò)我的Serialization庫(kù)有兩個(gè)缺點(diǎn)，就是效率不是特別高，因?yàn)槲耶a(chǎn)生的是可以與XML進(jìn)行互相轉(zhuǎn)換的通用對(duì)象。雖然這并不是必需的，只是我的個(gè)人愛(ài)好罷了。第二個(gè)缺點(diǎn)是Serialization會(huì)產(chǎn)生侵入式的代碼。使用方法如下：
首先改造需要被Serialize的類，使之成為一個(gè)Serializable Object：
1 class TestTree : public VL_SerializableObject
2 {
3 public:
4 VInt IntegerMember;
5 VUnicodeString StringMember;
6 VL_AutoPtr<TestTree> LeftTree;
7 VL_AutoPtr<TestTree> RightTree;
8
9 TestTree()
10 {
11 VL_REGISTER_SERIALIZABLE_FIELD(TestTree,IntegerMember);
12 VL_REGISTER_SERIALIZABLE_FIELD(TestTree,StringMember);
13 VL_REGISTER_SERIALIZABLE_FIELD(TestTree,LeftTree);
14 VL_REGISTER_SERIALIZABLE_FIELD(TestTree,RightTree);
15 }
16 };
其次構(gòu)造一個(gè)VL_Serializer并對(duì)這個(gè)類進(jìn)行注冊(cè)：
1 VL_Serializer Serializer;
2 VL_REGISTER_SERIALIZABLE_CLASS(&Serializer,TestTree);
完成了！現(xiàn)在可以嘗試將一個(gè)對(duì)象通過(guò)Serializer轉(zhuǎn)換成XML：
1 VL_AutoPtr<TestTree> Root=new TestTree;
2 Root->IntegerMember=10;
3 Root->StringMember=L"Root";
4
5 VL_AutoPtr<TestTree> Left=new TestTree;
6 Left->IntegerMember=20;
7 Left->StringMember=L"Left";
8
9 VL_AutoPtr<TestTree> Right=new TestTree;
10 Right->IntegerMember=30;
11 Right->StringMember=L"Right";
12
13 Root->LeftTree=Left;
14 Root->RightTree=Right;
15
16 VL_CommonObject SerializedObject=Serializer.Serialize(Root.Object());
17 VL_XMLDocument Document;
18 Document.GetRootElement()->SetName(L"SerializedObject");
19 SerializedObject.SaveToXML(Document.GetRootElement());
20 VL_FileStream Stream(FileName,VL_FileStream::vfomWrite);
21 Document.Save(&Stream,true);
保存的那一段比較多，不過(guò)由于是死的，所以可以寫(xiě)一個(gè)函數(shù)來(lái)完成這些事情。讓我們看看保存到文件里面的XML吧：
1 <?xml version="1.0" encoding="gb2312" standalone="no" ?>
2 <SerializedObject>
3 <vcoClass TypeName="TestTree">
4 <vcoField FieldName="IntegerMember">
5 <vcoInt Value="0A000000" />
6 </vcoField>
7 <vcoField FieldName="LeftTree">
8 <vcoClass TypeName="TestTree">
9 <vcoField FieldName="IntegerMember">
10 <vcoInt Value="14000000" />
11 </vcoField>
12 <vcoField FieldName="LeftTree">
13 <vcoNull />
14 </vcoField>
15 <vcoField FieldName="RightTree">
16 <vcoNull />
17 </vcoField>
18 <vcoField FieldName="StringMember">
19 <vcoString Value="Left" />
20 </vcoField>
21 </vcoClass>
22 </vcoField>
23 <vcoField FieldName="RightTree">
24 <vcoClass TypeName="TestTree">
25 <vcoField FieldName="IntegerMember">
26 <vcoInt Value="1E000000" />
27 </vcoField>
28 <vcoField FieldName="LeftTree">
29 <vcoNull />
30 </vcoField>
31 <vcoField FieldName="RightTree">
32 <vcoNull />
33 </vcoField>
34 <vcoField FieldName="StringMember">
35 <vcoString Value="Right" />
36 </vcoField>
37 </vcoClass>
38 </vcoField>
39 <vcoField FieldName="StringMember">
40 <vcoString Value="Root" />
41 </vcoField>
42 </vcoClass>
43 </SerializedObject>
造這種東西出來(lái)是有特殊的目的的，并不打算將這個(gè)Serialization做成一個(gè)非常通用的Serialization。
關(guān)鍵部分的代碼如下：
頭文件：
1 /*******************************************************************************
2 Vczh Library++ 2.0
3 數(shù)據(jù)結(jié)構(gòu)::序列化
4 開(kāi)發(fā)者：陳梓瀚
5
6 接口：
7 類：
8 VL_SerializableObject ：可序列化對(duì)象基類
9 VL_Serializer ：序列化/反序列化處理器
10 函數(shù)：
11 VL_REGISTER_SERIALIZABLE_CLASS ：注冊(cè)可序列化類型
12 VL_REGISTER_SERIALIZABLE_FIELD ：注冊(cè)可序列化成員變量
13 *******************************************************************************/
14
15 #ifndef VL_SERIALIZATION
16 #define VL_SERIALIZATION
17
18 #include "Data\VL_Data_List.h"
19 #include "Data\VL_Data_Map.h"
20 #include "VL_CommonData.h"
21
22 namespace vl
23 {
24 namespace serialization
25 {
26 using namespace collection;
27 using namespace commondata;
28
29 class VL_Serializer;
30
31 class VL_SerializableObject : public VL_Base
32 {
33 protected:
34 class FieldSerializerBase : public VL_Base
35 {
36 public:
37 typedef VL_List<VL_AutoPtr<FieldSerializerBase> , false , FieldSerializerBase*> List;
38 protected:
39 VUnicodeString FFieldName;
40
41 public:
42 FieldSerializerBase(VUnicodeString FieldName);
43
44 virtual void Serialize(VL_Serializer* Serializer , VL_CommonObject& ClassObject)=0;
45 };
46
47 #define DECLARE_PRIMITIVE_SERIALIZER(FIELD) \
48 template<typename _Type> \
49 class FieldSerializer<_Type , FIELD> : public FieldSerializerBase \
50 { \
51 protected: \
52 _Type* FObject; \
53 FIELD _Type::* FFieldPointer; \
54 public: \
55 FieldSerializer(_Type* Object , FIELD _Type::* FieldPointer , VUnicodeString FieldName) \
56 :FieldSerializerBase(FieldName) \
57 { \
58 FObject=Object; \
59 FFieldPointer=FieldPointer; \
60 } \
61 \
62 void Serialize(VL_Serializer* Serializer , VL_CommonObject& ClassObject) \
63 { \
64 ClassObject.SetFieldValue(FFieldName,VL_CommonObject::CreatePrimitive(FObject->*FFieldPointer)); \
65 } \
66 }
67
68 template<typename _Type , typename _Field>
69 class FieldSerializer : public FieldSerializerBase
70 {
71 protected:
72 _Type* FObject;
73 _Field _Type::* FFieldPointer;
74 public:
75 FieldSerializer(_Type* Object , _Field _Type::* FieldPointer , VUnicodeString FieldName)
76 :FieldSerializerBase(FieldName)
77 {
78 FObject=Object;
79 FFieldPointer=FieldPointer;
80 }
81
82 void Serialize(VL_Serializer* Serializer , VL_CommonObject& ClassObject)
83 {
84 ClassObject.SetFieldValue(FFieldName,Serializer->Serialize(&(FObject->*FFieldPointer)));
85 }
86 };
87
88 DECLARE_PRIMITIVE_SERIALIZER(VBool);
89 DECLARE_PRIMITIVE_SERIALIZER(VByte);
90 DECLARE_PRIMITIVE_SERIALIZER(VInt);
91 DECLARE_PRIMITIVE_SERIALIZER(VFloat);
92 DECLARE_PRIMITIVE_SERIALIZER(VDouble);
93 DECLARE_PRIMITIVE_SERIALIZER(VSize);
94 DECLARE_PRIMITIVE_SERIALIZER(VChar);
95 DECLARE_PRIMITIVE_SERIALIZER(VWChar);
96 DECLARE_PRIMITIVE_SERIALIZER(VUnicodeString);
97
98 #undef DECLARE_PRIMITIVE_SERIALIZER
99
100 template<typename _Type , typename _Field>
101 class FieldSerializer<_Type , _Field*> : public FieldSerializerBase
102 {
103 protected:
104 _Type* FObject;
105 _Field* _Type::* FFieldPointer;
106 public:
107 FieldSerializer(_Type* Object , _Field* _Type::* FieldPointer , VUnicodeString FieldName)
108 :FieldSerializerBase(FieldName)
109 {
110 FObject=Object;
111 FFieldPointer=FieldPointer;
112 }
113
114 void Serialize(VL_Serializer* Serializer , VL_CommonObject& ClassObject)
115 {
116 ClassObject.SetFieldValue(FFieldName,Serializer->Serialize(FObject->*FFieldPointer));
117 }
118 };
119
120 template<typename _Type , typename _Field>
121 class FieldSerializer<_Type , VL_AutoPtr<_Field>> : public FieldSerializerBase
122 {
123 protected:
124 _Type* FObject;
125 VL_AutoPtr<_Field> _Type::* FFieldPointer;
126 public:
127 FieldSerializer(_Type* Object , VL_AutoPtr<_Field> _Type::* FieldPointer , VUnicodeString FieldName)
128 :FieldSerializerBase(FieldName)
129 {
130 FObject=Object;
131 FFieldPointer=FieldPointer;
132 }
133
134 void Serialize(VL_Serializer* Serializer , VL_CommonObject& ClassObject)
135 {
136 ClassObject.SetFieldValue(FFieldName,Serializer->Serialize((FObject->*FFieldPointer).Object()));
137 }
138 };
139
140 template<typename _Type , typename _Field>
141 void AddFieldSerializer(_Type* Object , _Field _Type::* FieldPointer , VUnicodeString FieldName)
142 {
143 FFieldSerializers.Add(new FieldSerializer<_Type,_Field>(Object,FieldPointer,FieldName));
144 }
145 private:
146 FieldSerializerBase::List FFieldSerializers;
147 public:
148 VL_SerializableObject();
149 ~VL_SerializableObject();
150
151 virtual void Serialize(VL_Serializer* Serializer , VL_CommonObject& ClassObject);
152 virtual VBool Deserialize(VL_Serializer* Serializer , const VL_CommonObject& ClassObject);
153 };
154
155 class VL_Serializer : public VL_Base
156 {
157 public:
158 class ClassSerializerBase : public VL_Base
159 {
160 public:
161 typedef VL_List<VL_AutoPtr<ClassSerializerBase> , false , ClassSerializerBase*> List;
162 virtual VBool Accept(VL_SerializableObject* Object)=0;
163 virtual VUnicodeString GetClassTypeName()=0;
164 };
165
166 template<typename _Type>
167 class ClassSerializer : public ClassSerializerBase
168 {
169 protected:
170 VUnicodeString FClassTypeName;
171
172 public:
173 ClassSerializer(VUnicodeString ClassTypeName)
174 {
175 FClassTypeName=ClassTypeName;
176 }
177
178 VBool Accept(VL_SerializableObject* Object)
179 {
180 return dynamic_cast<_Type*>(Object)!=0;
181 }
182
183 VUnicodeString GetClassTypeName()
184 {
185 return FClassTypeName;
186 }
187 };
188 protected:
189 ClassSerializerBase::List FClassSerializers;
190 public:
191 VL_Serializer();
192 ~VL_Serializer();
193
194 void RegisterClass(ClassSerializerBase* aClassSerializer);
195 ClassSerializerBase* SelectClass(VL_SerializableObject* Object);
196 VL_CommonObject Serialize(VL_SerializableObject* Object);
197 };
198
199 template<typename _Type>
200 void GenericDeserializerMethod(VL_Serializer* Serializer , const VL_CommonObject& Object , VL_SerializableObject*& Result)
201 {
202 Result=new _Type();
203 Result->Deserialize(Serializer,Object);
204 }
205
206 #define VL_REGISTER_SERIALIZABLE_CLASS(SERIALIZER,CLASS) \
207 do{ \
208 (SERIALIZER)->RegisterClass(new VL_Serializer::ClassSerializer<CLASS>(L#CLASS)); \
209 }while(0)
210
211 #define VL_REGISTER_SERIALIZABLE_FIELD(CLASS,FIELD) \
212 do{ \
213 AddFieldSerializer(this,&CLASS::FIELD,L#FIELD); \
214 }while(0)
215 }
216 }
217
218 #endif
實(shí)現(xiàn)文件：
1 #include "VL_Serialization.h"
2
3 namespace vl
4 {
5 namespace serialization
6 {
7
8 /*********************************************************************************************************
9 VL_SerializableObject
10 *********************************************************************************************************/
11
12 VL_SerializableObject::FieldSerializerBase::FieldSerializerBase(VUnicodeString FieldName)
13 {
14 FFieldName=FieldName;
15 }
16
17 VL_SerializableObject::VL_SerializableObject()
18 {
19 }
20
21 VL_SerializableObject::~VL_SerializableObject()
22 {
23 }
24
25 void VL_SerializableObject::Serialize(VL_Serializer* Serializer , VL_CommonObject& ClassObject)
26 {
27 for(VInt i=0;i<FFieldSerializers.GetCount();i++)
28 {
29 FFieldSerializers[i]->Serialize(Serializer,ClassObject);
30 }
31 }
32
33 VBool VL_SerializableObject::Deserialize(VL_Serializer* Serializer , const VL_CommonObject& ClassObject)
34 {
35 return false;
36 }
37
38 /*********************************************************************************************************
39 VL_Serializer
40 *********************************************************************************************************/
41
42 VL_Serializer::VL_Serializer()
43 {
44 }
45
46 VL_Serializer::~VL_Serializer()
47 {
48 }
49
50 void VL_Serializer::RegisterClass(ClassSerializerBase* aClassSerializer)
51 {
52 FClassSerializers.Add(aClassSerializer);
53 }
54
55 VL_Serializer::ClassSerializerBase* VL_Serializer::SelectClass(VL_SerializableObject* Object)
56 {
57 for(VInt i=0;i<FClassSerializers.GetCount();i++)
58 {
59 ClassSerializerBase* Class=FClassSerializers[i].Object();
60 if(Class->Accept(Object))
61 {
62 return Class;
63 }
64 }
65 return 0;
66 }
67
68 VL_CommonObject VL_Serializer::Serialize(VL_SerializableObject* Object)
69 {
70 if(Object)
71 {
72 ClassSerializerBase* Class=SelectClass(Object);
73 if(Class)
74 {
75 VL_CommonObject ClassObject=VL_CommonObject::CreateClass(Class->GetClassTypeName());
76 Object->Serialize(this,ClassObject);
77 return ClassObject;
78 }
79 else
80 {
81 return VL_CommonObject::CreateError();
82 }
83 }
84 else
85 {
86 return VL_CommonObject::CreateNull();
87 }
88 }
89
90 }
91 }
posted on 2008-11-21 09:09
陳梓瀚(vczh) 閱讀(2835)
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