private MethodInfo getModuleMethod(
RhspManager manager,
string methodName,
RhspParameterCollection rhspParams)
{
var nameQuery = from m in manager.GetType().GetMethods()
where m.Name == methodName
select m;
if (nameQuery.Count() == 0)
{
throw new RhspException(
"No methods exist with the name '" + methodName + "'.");
}
var paramCountQuery = from m in nameQuery
where m.GetParameters().Length == rhspParams.Count
select m;
if (paramCountQuery.Count() == 0)
{
throw new RhspException(
"None of the methods named '" + methodName + "' have " +
"the same number of prameters as specified in the command.");
}
var paramNameQuery = from m in paramCountQuery
where methodHasParamNames(m, rhspParams)
select m;
if (paramNameQuery.Count() == 0)
{
throw new RhspException(
"The method with name '" + methodName + "' has the " +
"correct number of parameters, but at least one of " +
"either the parameter names or types do not match.");
}
var moduleMethodQuery = from m in paramNameQuery
where hasModuleMethodAttribute(m)
select m;
if (moduleMethodQuery.Count() == 0)
{
throw new RhspException(
"The method with name '" + methodName + "' has the correct number " +
"of parameters and the correct parameter types, but does not implement " +
"the attribute " + typeof(RhspModuleMethodAttribute).FullName + ".");
}
return(moduleMethodQuery.Single());
}
private bool methodHasParamNames(MethodInfo method, RhspParameterCollection rhspParams)
{
int validNameCount = 0;
foreach (RhspParameter rhspParam in rhspParams.ToArray())
{
if (methodHasParamName(method, rhspParam))
{
validNameCount++;
}
}
// Only true when the number of valid parameters matches the param count.
return(validNameCount == method.GetParameters().Length);
}
