/// <summary>
/// Constructs a new command line argument.
/// </summary>
/// <param name="attribute">The attribute that defines the argument</param>
/// <param name="propertyInfo">The arguments property information</param>
public CommandLineArgument(CommandLineArgumentAttribute attribute, PropertyInfo propertyInfo)
{
// Set these two things first
this.attribute = attribute;
this.propertyInfo = propertyInfo;
if (this.IsArray)
{
// Get an element type if the argument is an array
valueType = propertyInfo.PropertyType.GetElementType();
if (valueType == typeof(object))
{
throw new NotSupportedException(CommandLineParserResources.PropertyIsNotAStronglyTypedArray(propertyInfo.Name));
}
}
else if (this.IsCollection)
{
// Locate Add method with 1 parameter that is not System.Object
foreach (MethodInfo method in propertyInfo.PropertyType.GetMethods(BindingFlags.Public | BindingFlags.Instance))
{
if (method.Name == "Add" && method.GetParameters().Length == 1)
{
ParameterInfo parameter = method.GetParameters()[0];
if (parameter.ParameterType != typeof(object))
{
addMethod = method;
valueType = parameter.ParameterType;
}
}
if (method.Name == "GetEnumerator" && method.GetParameters().Length == 0 && typeof(IEnumerator).IsAssignableFrom(method.ReturnType))
{
getEnumeratorMethod = method;
}
if (addMethod != null && getEnumeratorMethod != null)
break;
}
// If we didn't find an appropriate Add method we can't write to the collection
if (addMethod == null)
{
throw new NotSupportedException(CommandLineParserResources.PropertyHasNoAddMethodWithNonObjectParameter(propertyInfo.Name));
}
// The collection derives from ICollection, so it would be really surprising if it didn't implement GetEnumerator
Debug.Assert(getEnumeratorMethod != null);
}
else
{
// The argument is not an array or collection, so it's safe to take the property type as the value type
this.valueType = propertyInfo.PropertyType;
}
this.values = new ArrayList(AllowMultiple ? 4 : 1);
}
/// <summary>
/// Constructs a new command line argument.
/// </summary>
/// <param name="attribute">The attribute that defines the argument</param>
/// <param name="propertyInfo">The arguments property information</param>
internal CommandLineArgument(object argTarget, CommandLineArgumentAttribute argAttribute, PropertyInfo argPropertyInfo)
{
// Set these two things first
this.argTarget = argTarget;
this.argType = argPropertyInfo.PropertyType;
this.argPropertyInfo = argPropertyInfo;
this.argAttribute = argAttribute;
if (typeof(ICollection).IsAssignableFrom(argType))
{
if (argType.IsArray)
throw new NotSupportedException(CommandLineParserResources.ArraysAreNotSupported(argPropertyInfo.Name));
// Locate Add method with 1 parameter that is not System.Object
foreach (MethodInfo method in argPropertyInfo.PropertyType.GetMethods(BindingFlags.Public | BindingFlags.Instance))
{
if (method.Name == "Add" && method.GetParameters().Length == 1)
{
ParameterInfo parameter = method.GetParameters()[0];
if (parameter.ParameterType != typeof(object))
{
argAddMethod = method;
argType = parameter.ParameterType;
break;
}
}
}
// If we didn't find an appropriate Add method we can't write to the collection
if (argAddMethod == null)
{
throw new NotSupportedException(CommandLineParserResources.PropertyHasNoAddMethodWithNonObjectParameter(argPropertyInfo.Name));
}
}
}
