/// <summary>
/// Gets the value of an open property
/// </summary>
/// <param name="value">The instance to get the property value from</param>
/// <param name="propertyName">The open property name</param>
/// <returns>The open property's value</returns>
public virtual object GetValue(object value, string propertyName)
{
ExceptionUtilities.CheckArgumentNotNull(value, "value");
ExceptionUtilities.CheckArgumentNotNull(propertyName, "propertyName");
// for sub-values of a complex type inside an open property, GetValue will still be used
// so we should check before calling GetOpenPropertyValue (which will throw on non-open types)
ResourceType type = this.GetResourceType(value);
ExceptionUtilities.CheckObjectNotNull(type, "GetValue called with object of unknown type. Type was '{0}'", value.GetType());
if (type.IsOpenType)
{
return(this.QueryProvider.GetOpenPropertyValue(value, propertyName));
}
ExceptionUtilities.Assert(type.ResourceTypeKind == ResourceTypeKind.ComplexType, "OpenTypeMethods.GetValue used on non-open, non-complex type '{0}'", type.FullName);
ResourceProperty resourceProperty = type.GetAllPropertiesLazily().SingleOrDefault(p => p.Name == propertyName);
ExceptionUtilities.CheckObjectNotNull(resourceProperty, "OpenTypeMethods.GetValue used on non-open type '{0}' with non-existent property '{1}'", type.FullName, propertyName);
return(this.QueryProvider.GetPropertyValue(value, resourceProperty));
}
/// <summary>
/// Tries to get a replacement expression for the given method with the given parameters
/// </summary>
/// <param name="toReplace">The method to replace</param>
/// <param name="parameters">The parameters to the method</param>
/// <param name="replaced">The replaced expression</param>
/// <returns>True if a replacement was made, false otherwise</returns>
public override bool TryGetReplacement(MethodInfo toReplace, IEnumerable <Expression> parameters, out Expression replaced)
{
if (this.CanReplace(toReplace) && toReplace.Name == "OfType")
{
var parameterExpressions = parameters.ToList();
ExceptionUtilities.Assert(parameterExpressions.Count == 2, "OfType requires exactly 2 parameter expressions");
var constantExpression = parameterExpressions[1] as ConstantExpression;
ExceptionUtilities.CheckObjectNotNull(constantExpression, "OfType requires the 2nd parameter to be a constant");
var resourceType = constantExpression.Value as ResourceType;
ExceptionUtilities.CheckObjectNotNull(constantExpression, "OfType requires the 2nd parameter to be a resource type");
var genericArguments = toReplace.GetGenericArguments();
ExceptionUtilities.Assert(genericArguments.Length == 2, "OfType requires exactly 2 generic arguments");
replaced = this.OfType(parameterExpressions[0], resourceType, genericArguments[0], genericArguments[1]);
return(true);
}
return(base.TryGetReplacement(toReplace, parameters, out replaced));
}
