Nebula2探秘05-RTTI

王朝other·作者佚名 2007-05-07

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Nebula2探秘05-RTTI

happykevins文

Nebula2的RTTI支持都是在nObject这一层实现的，每个继承自nObject的类都有IsA()和IsInstanceof()两个方法，前者用于判断继承关系，后者则用于判断一个对象是否为指定类的实例，下面的代码说明了他们的用法。

/****************************************************************************/

/* Nebula2 - Tutorial 05 */

/* Nebula2 RTTI */

/* author: happykevins */

/****************************************************************************/

///----------------------------------------------------------------------------

/// +必要头文件

#include "kernel/nkernelserver.h"

#include "kernel/ntimeserver.h"

#include "kernel/nfileserver2.h"

/// -必要头文件

///----------------------------------------------------------------------------

/// +链接库

#pragma comment(lib, "wsock32.lib")

#pragma comment(lib, "d_nkernel.lib")

/// -链接库

///----------------------------------------------------------------------------

/// +Application

int main(int argc, const char** argv)

{

/// 创建KernelServer

nKernelServer* ks = n_new(nKernelServer);

///----------------------------------------------------------------------------

/// +Nebula2 RTTI Test

/// @note:

/// Nebula2 RTTI implement mostly depends on nClass && nObject

/// firstly: we got some instance (all inherited from nObject)

nRoot* nroot = (nRoot*)ks->New("nroot");

nObject* nobject = (nObject*)ks->New("nobject");

nTimeServer* ntimeserver = (nTimeServer*)ks->Lookup("/sys/servers/time");

nFileServer2* nfileserver2 = (nFileServer2*)ks->Lookup("/sys/servers/file2");

/// secondly: Test RTTI Info.

/// use 'IsA' & 'IsInstanceOf' methods

// 1. nroot is a nroot?

n_printf("[%s] is %s [%s] ",

nroot->GetClass()->GetName(),

nroot->IsA("nroot") ? "\b" : "not",

"nroot");

// 2. nroot is a nobject?

n_printf("[%s] is %s [%s] ",

nroot->GetClass()->GetName(),

nroot->IsA(ks->FindClass("nobject")) ? "\b" : "not",

"nobject");

// 3. nobject is a nroot?

n_printf("[%s] is %s [%s] ",

nobject->GetClass()->GetName(),

nobject->IsA("nroot") ? "\b" : "not",

"nroot");

// 4. ntimerserver is a nroot?

n_printf("[%s] is %s [%s] ",

ntimeserver->GetClass()->GetName(),

ntimeserver->IsA("nroot") ? "\b" : "not",

"nroot");

// 5. nroot is instance of nroot?

n_printf("[%s] is %s instance of [%s] ",

nroot->GetClass()->GetName(),

nroot->IsInstanceOf(ks->FindClass("nroot")) ? "\b" : "not",

"nroot");

// 6. nroot is instance of nobject?

n_printf("[%s] is %s instance of [%s] ",

nroot->GetClass()->GetName(),

nroot->IsInstanceOf(ks->FindClass("nobject")) ? "\b" : "not",

"nobject");

// 7. nfileserver2 is a nobject?

n_printf("[%s] is %s [%s] ",

nfileserver2->GetClass()->GetName(),

nfileserver2->IsA("nobject") ? "\b" : "not",

"nobject");

// 8. nfileserver2 is a ntimeserver?

n_printf("[%s] is %s [%s] ",

nfileserver2->GetClass()->GetName(),

nfileserver2->IsA("ntimeserver") ? "\b" : "not",

"ntimeserver");

/// +Nebula2 RTTI Test

///----------------------------------------------------------------------------

/// 销毁KernelServer

n_delete(ks);

getchar();

return 0;

}

/// -Application

///----------------------------------------------------------------------------