protected override object MethodInvoke(PSMethod method, object[] arguments)
{
ManagementObject baseObject = method.baseObject as ManagementObject;
WMIMethodCacheEntry adapterData = (WMIMethodCacheEntry)method.adapterData;
return(this.AuxillaryInvokeMethod(baseObject, adapterData, arguments));
}
protected override Collection <string> MethodDefinitions(PSMethod method)
{
WMIMethodCacheEntry adapterData = (WMIMethodCacheEntry)method.adapterData;
return(new Collection <string> {
adapterData.MethodDefinition
});
}
/// <summary>
/// Called after a non null return from GetMember to return the overloads
/// </summary>
/// <param name="method">the return of GetMember</param>
/// <returns></returns>
protected override Collection <String> MethodDefinitions(PSMethod method)
{
WMIMethodCacheEntry methodEntry = (WMIMethodCacheEntry)method.adapterData;
Collection <string> returnValue = new Collection <string>();
returnValue.Add(methodEntry.MethodDefinition);
return(returnValue);
}
/// <summary>
/// Called after a non null return from GetMember to try to call
/// the method with the arguments
/// </summary>
/// <param name="method">the non empty return from GetMethods</param>
/// <param name="arguments">the arguments to use</param>
/// <returns>the return value for the method</returns>
protected override object MethodInvoke(PSMethod method, object[] arguments)
{
ManagementObject mgmtObject = method.baseObject as ManagementObject;
Diagnostics.Assert(mgmtObject != null,
"Object is not of ManagementObject type");
WMIMethodCacheEntry methodEntry = (WMIMethodCacheEntry)method.adapterData;
return(AuxillaryInvokeMethod(mgmtObject, methodEntry, arguments));
}
private Object AuxillaryInvokeMethod(ManagementObject obj, WMIMethodCacheEntry mdata, object[] arguments)
{
// Evaluate method and arguments
object[] verifiedArguments;
MethodInformation[] methods = new MethodInformation[1];
methods[0] = mdata.MethodInfoStructure;
// This will convert Null Strings to Empty Strings
GetBestMethodAndArguments(mdata.Name, methods, arguments, out verifiedArguments);
ParameterInformation[] parameterList = mdata.MethodInfoStructure.parameters;
// GetBestMethodAndArguments should fill verifiedArguments with
// correct values (even if some values are not specified)
tracer.WriteLine("Parameters found {0}. Arguments supplied {0}",
parameterList.Length, verifiedArguments.Length);
Diagnostics.Assert(parameterList.Length == verifiedArguments.Length,
"The number of parameters and arguments should match");
// we should not cache inParameters as we are updating
// inParameters object with argument values..Caching will
// have side effects in this scenario like we have to clear
// the values once the method is invoked.
// Also caching MethodData occupies lot of memory compared to
// caching string.
ManagementClass mClass = CreateClassFrmObject(obj);
ManagementBaseObject inParameters = mClass.GetMethodParameters(mdata.Name);
for (int i = 0; i < parameterList.Length; i++)
{
// this cast should always succeed
WMIParameterInformation pInfo = (WMIParameterInformation)parameterList[i];
// Should not convert null input arguments
// GetBestMethodAndArguments converts null strings to empty strings
// and also null ints to 0. But WMI providers do not like these
// conversions. So dont convert input arguments if they are null.
// We could have done this in the base adapter but the change would be
// costly for other adpaters which dont mind the conversion.
if ((i < arguments.Length) && (arguments[i] == null))
{
verifiedArguments[i] = null;
}
inParameters[pInfo.Name] = verifiedArguments[i];
}
return(InvokeManagementMethod(obj, mdata.Name, inParameters));
}
private static void PopulateMethodTable(ManagementClass mgmtClass, CacheTable methodTable, bool staticBinding)
{
MethodDataCollection methods = mgmtClass.Methods;
if (methods != null)
{
ManagementPath classPath = mgmtClass.ClassPath;
foreach (MethodData data in methods)
{
if (IsStaticMethod(data) == staticBinding)
{
string name = data.Name;
WMIMethodCacheEntry member = new WMIMethodCacheEntry(name, classPath.Path, data);
methodTable.Add(name, member);
}
}
}
}
private object AuxillaryInvokeMethod(ManagementObject obj, WMIMethodCacheEntry mdata, object[] arguments)
{
object[] objArray;
MethodInformation[] methods = new MethodInformation[] { mdata.MethodInfoStructure };
Adapter.GetBestMethodAndArguments(mdata.Name, methods, arguments, out objArray);
ParameterInformation[] parameters = mdata.MethodInfoStructure.parameters;
Adapter.tracer.WriteLine("Parameters found {0}. Arguments supplied {0}", new object[] { parameters.Length, objArray.Length });
ManagementBaseObject methodParameters = CreateClassFrmObject(obj).GetMethodParameters(mdata.Name);
for (int i = 0; i < parameters.Length; i++)
{
WMIParameterInformation information = (WMIParameterInformation)parameters[i];
if ((i < arguments.Length) && (arguments[i] == null))
{
objArray[i] = null;
}
methodParameters[information.Name] = objArray[i];
}
return(this.InvokeManagementMethod(obj, mdata.Name, methodParameters));
}
/// <summary>
/// Populates methods of a ManagementClass in a CacheTable
/// </summary>
/// <param name="mgmtClass">Class to get the method info from.</param>
/// <param name="methodTable">Cachetable to update.</param>
/// <param name="staticBinding">controls what methods are adapted.</param>
/// <exception cref="UnauthorizedAccessException"></exception>
/// <exception cref="ManagementException"></exception>
private static void PopulateMethodTable(ManagementClass mgmtClass, CacheTable methodTable, bool staticBinding)
{
Dbg.Assert(null != mgmtClass, "ManagementClass cannot be null in this method");
MethodDataCollection mgmtMethods = mgmtClass.Methods;
if (null != mgmtMethods)
{
ManagementPath classPath = mgmtClass.ClassPath;
// new operation will never fail
foreach (MethodData mdata in mgmtMethods)
{
// is method static
bool isStatic = IsStaticMethod(mdata);
if (isStatic == staticBinding)
{
// a method is added depending on
// whether staticBinding is requested or not.
string methodName = mdata.Name;
WMIMethodCacheEntry mCache = new WMIMethodCacheEntry(methodName, classPath.Path, mdata);
methodTable.Add(methodName, mCache);
}
}
}
}
