加入备忘录模式

DesignPattern.sln

@@ -35,6 +35,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "StatePattern", "StatePatter
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "ObserverPattern", "ObserverPattern\ObserverPattern.vcxproj", "{052C8FBE-6E06-4869-B779-B5AF6D5AEC65}"
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "MementoPattern", "MementoPattern\MementoPattern.vcxproj", "{9727E0D3-66C5-4812-B13C-DC4C1F06ACAD}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Win32 = Debug|Win32
@@ -105,6 +107,10 @@ Global
 		{052C8FBE-6E06-4869-B779-B5AF6D5AEC65}.Debug|Win32.Build.0 = Debug|Win32
 		{052C8FBE-6E06-4869-B779-B5AF6D5AEC65}.Release|Win32.ActiveCfg = Release|Win32
 		{052C8FBE-6E06-4869-B779-B5AF6D5AEC65}.Release|Win32.Build.0 = Release|Win32
+		{9727E0D3-66C5-4812-B13C-DC4C1F06ACAD}.Debug|Win32.ActiveCfg = Debug|Win32
+		{9727E0D3-66C5-4812-B13C-DC4C1F06ACAD}.Debug|Win32.Build.0 = Debug|Win32
+		{9727E0D3-66C5-4812-B13C-DC4C1F06ACAD}.Release|Win32.ActiveCfg = Release|Win32
+		{9727E0D3-66C5-4812-B13C-DC4C1F06ACAD}.Release|Win32.Build.0 = Release|Win32
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

MementoPattern/MementoPattern.cpp

@@ -0,0 +1,79 @@
+#include <iostream>
+#include <string>
+using namespace std;
+
+class Memento {
+private:
+    friend class Originator;
+
+    Memento(const string& st) {
+        _st = st;
+    }
+
+    void SetState(const string& st) {
+        _st = st;
+    }
+
+    string GetState() {
+        return _st;
+    }
+
+private:
+    string _st;
+};
+
+class Originator {
+public:
+    Originator() {
+        _mt = nullptr;
+    }
+
+    Originator(const string &st) {
+        _st = st;
+        _mt = nullptr;
+    }
+
+    Memento* CreateMemento() {
+        return new Memento(_st);
+    }
+
+    void SetMemento(Memento* mt) {
+        _mt = mt;
+    }
+
+    void RestoreToMemento(Memento* mt) {
+        _st = mt->GetState();
+    }
+
+    string GetState() {
+        return _st;
+    }
+
+    void SetState(const string& st) {
+        _st = st;
+    }
+
+    void PrintState() {
+        cout << _st << "..." << endl;
+    }
+
+private:
+    string _st;
+    Memento *_mt;
+};
+
+int main() {
+    Originator *o = new Originator();
+    o->SetState("old");
+    o->PrintState();
+    Memento *m = o->CreateMemento();
+    o->SetState("new");
+    o->PrintState();
+    o->RestoreToMemento(m);
+    o->PrintState();
+
+    delete o;
+    delete m;
+
+    return 0;
+}

MementoPattern/MementoPattern.vcxproj

@@ -0,0 +1,84 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{9727E0D3-66C5-4812-B13C-DC4C1F06ACAD}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+    <RootNamespace>MementoPattern</RootNamespace>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v120</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v120</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <LinkIncremental>true</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="MementoPattern.cpp" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>

MementoPattern/MementoPattern.vcxproj.filters

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="源文件">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+    <Filter Include="头文件">
+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
+      <Extensions>h;hh;hpp;hxx;hm;inl;inc;xsd</Extensions>
+    </Filter>
+    <Filter Include="资源文件">
+      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="MementoPattern.cpp">
+      <Filter>源文件</Filter>
+    </ClCompile>
+  </ItemGroup>
+</Project>