public RequiredArgument(ParameterInfo parameterInfo)
{
Name = parameterInfo.Name;
Type = parameterInfo.ParameterType;
ReflectionObject = parameterInfo;
HasDefaultValue = parameterInfo.HasDefaultValue;
DefaultValue = parameterInfo.DefaultValue;
DemandIfAny = parameterInfo.GetCustomAttribute <DemandsInitializationAttribute>();
}
public RequiredArgument(PropertyInfo propertyInfo)
{
Name = propertyInfo.Name;
Type = propertyInfo.PropertyType;
ReflectionObject = propertyInfo;
HasDefaultValue = false;
DefaultValue = null;
DemandIfAny = propertyInfo.GetCustomAttribute <DemandsInitializationAttribute>();
}
public RequiredArgument(IArgument a)
{
Name = a.Name;
Type = a.GetSystemType();
ReflectionObject = a;
HasDefaultValue = true;
DefaultValue = a.GetValueAsSystemType();
DemandIfAny = null;
}
public void SetPropertiesForClass(RuntimeArgumentCollection args, object toSetPropertiesOf)
{
if (toSetPropertiesOf == null)
{
throw new NullReferenceException(ProcessTask.Path + " instance has not been created yet! Call SetProperties after the factory has created the instance.");
}
if (UsefulStuff.IsAssignableToGenericType(toSetPropertiesOf.GetType(), typeof(IPipelineRequirement <>)))
{
throw new Exception("ProcessTask '" + ProcessTask.Name + "' was was an instance of Class '" + ProcessTask.Path + "' which declared an IPipelineRequirement<>. RuntimeTask classes are not the same as IDataFlowComponents, IDataFlowComponents can make IPipelineRequirement requests but RuntimeTasks cannot");
}
if (UsefulStuff.IsAssignableToGenericType(toSetPropertiesOf.GetType(), typeof(IPipelineOptionalRequirement <>)))
{
throw new Exception("ProcessTask '" + ProcessTask.Name + "' was was an instance of Class '" + ProcessTask.Path + "' which declared an IPipelineOptionalRequirement<>. RuntimeTask classes are not the same as IDataFlowComponents, IDataFlowComponents can make IPipelineRequirement requests but RuntimeTasks cannot");
}
//get all possible properties that we could set
foreach (var propertyInfo in toSetPropertiesOf.GetType().GetProperties())
{
//see if any demand initialization
DemandsInitializationAttribute initialization = (DemandsInitializationAttribute)System.Attribute.GetCustomAttributes(propertyInfo).FirstOrDefault(a => a is DemandsInitializationAttribute);
//this one does
if (initialization != null)
{
try
{
//get the approrpriate value from arguments
var value = args.GetCustomArgumentValue(propertyInfo.Name);
//use reflection to set the value
propertyInfo.SetValue(toSetPropertiesOf, value, null);
}
catch (NotSupportedException e)
{
throw new Exception("Class " + toSetPropertiesOf.GetType().Name + " has a property " + propertyInfo.Name +
" but is of unexpected type " + propertyInfo.GetType(), e);
}
catch (KeyNotFoundException e)
{
if (initialization.Mandatory)
{
throw new ArgumentException(
"Class " + toSetPropertiesOf.GetType().Name + " has a Mandatory property '" + propertyInfo.Name +
"' marked with DemandsInitialization but no corresponding argument was provided in ArgumentCollection", e);
}
}
}
}
}
/// <summary>
/// Interrogates a class via reflection and enumerates it's properties to find any that have the attribute [DemandsInitialization]
/// Each one of these that is found is created as a ProcessTaskArgument of the appropriate Name and PropertyType under the parent ProcessTask
/// </summary>
/// <returns>Each new ProcessTaskArgument created - note that it will not return existing ones that were already present (and therefore not created)</returns>
public IEnumerable <IArgument> CreateArgumentsForClassIfNotExistsGeneric(
Type underlyingClassTypeForWhichArgumentsWillPopulate, IArgumentHost host,
IArgument[] existingArguments)
{
var classType = underlyingClassTypeForWhichArgumentsWillPopulate;
//get all the properties that must be set on AnySeparatorFileAttacher (Those marked with the attribute DemandsInitialization
var propertiesWeHaveToSet = GetRequiredProperties(classType);
foreach (var required in propertiesWeHaveToSet)
{
//theres already a property with the same name
if (existingArguments.Any(a => a.Name.Equals(required.Name)))
{
continue;
}
//create a new one
var argument = host.CreateNewArgument();
//set the type and name
argument.SetType(required.PropertyInfo.PropertyType);
argument.Name = required.Name;
DemandsInitializationAttribute attribute = required.Demand;
argument.Description = attribute.Description;
if (attribute.DefaultValue != null)
{
argument.SetValue(attribute.DefaultValue);
}
var saveable = argument as ISaveable;
if (saveable != null)
{
saveable.SaveToDatabase();
}
yield return(argument);
}
}
public void Check(ICheckNotifier notifier)
{
//get all possible properties that we could set
foreach (var propertyInfo in _classInstanceToCheck.GetType().GetProperties())
{
//see if any demand initialization
DemandsInitializationAttribute demand = System.Attribute.GetCustomAttributes(propertyInfo).OfType <DemandsInitializationAttribute>().FirstOrDefault();
//this one does
if (demand != null)
{
if (demand.Mandatory)
{
var value = propertyInfo.GetValue(_classInstanceToCheck);
if (value == null || string.IsNullOrEmpty(value.ToString()))
{
notifier.OnCheckPerformed(new CheckEventArgs("DemandsInitialization Property '" + propertyInfo.Name + "' is marked Mandatory but does not have a value", CheckResult.Fail));
}
}
}
}
}
/// <summary>
/// Records the fact that a given public property on a class is marked with <see cref="DemandsInitializationAttribute"/> and that the user is supposed
/// to provide a value for it in an <see cref="IArgument"/>
/// </summary>
/// <param name="demand"></param>
/// <param name="propertyInfo"></param>
/// <param name="parentPropertyInfo"></param>
public RequiredPropertyInfo(DemandsInitializationAttribute demand, PropertyInfo propertyInfo, PropertyInfo parentPropertyInfo = null)
{
Demand = demand;
ParentPropertyInfo = parentPropertyInfo;
PropertyInfo = propertyInfo;
}