Package org.metricshub.wmi.wbem

Class WmiComHelper

java.lang.Object

org.metricshub.wmi.wbem.WmiComHelper

public class WmiComHelper
extends Object

Class with various static methods to help with COM interaction.

Method Summary

Modifier and Type	Method	Description
static Object	comInvokerInvokeNativeObject(com.sun.jna.Pointer contextPointer, int vtableId, Object[] args, Class<?> returnType)	Same function than in com.sun.jna.platform.win32.COM.COMInvoker.
static void	initializeComLibrary()	Initializes COM library and sets security to impersonate the local userName.
static boolean	isComInitialized()
static void	unInitializeCom()	UnInitialize the COM library.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

initializeComLibrary

public static void initializeComLibrary()
                                 throws WmiComException

Initializes COM library and sets security to impersonate the local userName. This function needs to be called at least once for each thread, as COM must be initialized for each thread. You can call this function even if COM has already been initialized. It will verify first whether COM initialization has already been done for this thread before proceeding. The threading model is multi-threaded.

Throws:

WmiComException - when COM library cannot be instantiated

IllegalStateException - when COM library has already been initialized with a different threading model

unInitializeCom

public static void unInitializeCom()

UnInitialize the COM library.

isComInitialized

public static boolean isComInitialized()

Returns:

whether COM has been initialized for the current thread

comInvokerInvokeNativeObject

public static Object comInvokerInvokeNativeObject(com.sun.jna.Pointer contextPointer,
 int vtableId,
 Object[] args,
 Class<?> returnType)

Same function than in com.sun.jna.platform.win32.COM.COMInvoker._invokeNativeInt

Parameters:

contextPointer -

vtableId -

args -

returnType -

Returns:

whatever the specified function returns