Update ItemConfiguration to depend on new ItemMetadata

Previously, the `ItemConfiguration` accepted an `IEnumerable<Attribute>` (9705824), which is the common data used for `PropertyInfo`, `MethodInfo`, and `ParameterInfo`. Now, with the establishing of the `ItemMetadata` abstract class (bec7123), which is shared between `MemberAccessor` and the new `ParameterMetadata` (37eeb3c), we can instead accept an `ItemMetadata`. This gives us access to the `CustomAttributes`, just as before, but also provides access to additional metadata.

This will allow better sharing (and caching) of state data in `TopicMappingService` by allowing properties to be assessed off of `ItemMetadata` instead of reevaluating reflection data for every call. That will come in subsequent commits.

Author: JeremyCaney

OnTopic/Mapping/Internal/ItemConfiguration.cs

@@ -7,6 +7,7 @@
 using System.ComponentModel;
 using System.Reflection;
 using OnTopic.Collections.Specialized;
+using OnTopic.Internal.Reflection;
 using OnTopic.Mapping.Annotations;
 
 namespace OnTopic.Mapping.Internal {
@@ -44,18 +45,18 @@ internal class ItemConfiguration {
     ///   Given an <see cref="IEnumerable{Attribute}"/> instance, exposes a set of properties associated with known
     ///   <see cref="Attribute"/> instances.
     /// </summary>
-    /// <param name="customAttributes">
-    ///   The <see cref="IEnumerable{Attribute}"/> instance to check for <see cref="Attribute"/> values.
+    /// <param name="itemMetadata">
+    ///   The <see cref="ItemMetadata"/> instance associated with this <see cref="ItemConfiguration"/>.
     /// </param>
     /// <param name="name">The name of the <see cref="ParameterInfo"/> or <see cref="PropertyInfo"/>.</param>
     /// <param name="attributePrefix">The prefix to apply to the attributes.</param>
-    internal ItemConfiguration(IEnumerable<Attribute> customAttributes, string name, string? attributePrefix = "") {
+    internal ItemConfiguration(ItemMetadata itemMetadata, string name, string? attributePrefix = "") {
 
       /*------------------------------------------------------------------------------------------------------------------------
-      | Set backing property
+      | Set backing properties
       \-----------------------------------------------------------------------------------------------------------------------*/
-      CustomAttributes          = customAttributes;
-      var source                = customAttributes;
+      Metadata                  = itemMetadata;
+      CustomAttributes          = itemMetadata.CustomAttributes;
 
       /*------------------------------------------------------------------------------------------------------------------------
       | Set default values
@@ -104,7 +105,7 @@ internal ItemConfiguration(IEnumerable<Attribute> customAttributes, string name,
       /*------------------------------------------------------------------------------------------------------------------------
       | Attributes: Set attribute filters
       \-----------------------------------------------------------------------------------------------------------------------*/
-      var filterByAttributes = source.OfType<FilterByAttributeAttribute>();
+      var filterByAttributes = CustomAttributes.OfType<FilterByAttributeAttribute>();
       if (filterByAttributes is not null && filterByAttributes.Any()) {
         foreach (var filter in filterByAttributes) {
           AttributeFilters.Add(filter.Key, filter.Value);
@@ -113,6 +114,14 @@ internal ItemConfiguration(IEnumerable<Attribute> customAttributes, string name,
 
     }
 
+    /*==========================================================================================================================
+    | PROPERTY: METADATA
+    \-------------------------------------------------------------------------------------------------------------------------*/
+    /// <summary>
+    ///   The <see cref="ItemMetadata"/> that the current <see cref="ItemConfiguration"/> is associated with.
+    /// </summary>
+    internal ItemMetadata Metadata { get; }
+
     /*==========================================================================================================================
     | PROPERTY: CUSTOM ATTRIBUTES
     \-------------------------------------------------------------------------------------------------------------------------*/

OnTopic/Mapping/Internal/PropertyConfiguration.cs

@@ -44,7 +44,7 @@ internal class PropertyConfiguration: ItemConfiguration {
     /// </param>
     /// <param name="attributePrefix">The prefix to apply to the attributes.</param>
     internal PropertyConfiguration(MemberAccessor memberAccessor, string? attributePrefix = ""):
-      base(memberAccessor.CustomAttributes, memberAccessor.Name, attributePrefix)
+      base(memberAccessor, memberAccessor.Name, attributePrefix)
     {
       MemberAccessor            = memberAccessor;
     }

OnTopic/Mapping/TopicMappingService.cs

@@ -377,7 +377,7 @@ private async Task<object> MapAsync(
       /*------------------------------------------------------------------------------------------------------------------------
       | Establish per-property variables
       \-----------------------------------------------------------------------------------------------------------------------*/
-      var configuration         = new ItemConfiguration(parameter.CustomAttributes, parameter.Name, attributePrefix);
+      var configuration         = new ItemConfiguration(parameter, parameter.Name, attributePrefix);
 
       /*------------------------------------------------------------------------------------------------------------------------
       | Bypass if mapping is disabled