/// <summary>
/// Gets the target set from the binding set and path expression.
/// </summary>
/// <param name="provider">Provider instance to resolve the association set.</param>
/// <param name="bindingSet">Binding resource set.</param>
/// <returns>Returns the target resource set for the path expression.</returns>
internal ResourceSetWrapper GetTargetSet(DataServiceProviderWrapper provider, ResourceSetWrapper bindingSet)
{
Debug.Assert(provider != null, "provider != null");
Debug.Assert(bindingSet != null, "sourceSet != null");
Debug.Assert(this.pathSegments != null && this.pathSegments.Length > 0, "InitializePathSegments() must be called before this.");
Debug.Assert(bindingSet.ResourceType.IsAssignableFrom(this.pathSegments[0].SourceType), "bindingSet.ResourceType.IsAssignableFrom(this.pathSegments[0].SourceType)");
ResourceSetWrapper resultSet = bindingSet;
for (int idx = 0; resultSet != null && idx < this.pathSegments.Length; idx++)
{
PathSegment segment = this.pathSegments[idx];
if (segment.Property != null)
{
resultSet = provider.GetResourceSet(resultSet, segment.SourceType, segment.Property);
}
#if DEBUG
else
{
Debug.Assert(idx == 0, "Path cannot end with type identifier.");
}
#endif
}
return(resultSet);
}
/// <summary>
/// Checks if the cache is populated, otherwise populates it.
/// </summary>
/// <param name="provider">Data service provider instance.</param>
/// <param name="type">Resource type in question.</param>
/// <returns>An instance of ResourcePropertyCache, with all information about the properties cached.</returns>
private ResourcePropertyCache InitializeResourcePropertyCache(DataServiceProviderWrapper provider, ResourceType type)
{
Debug.Assert(provider != null, "provider != null");
Debug.Assert(type != null, "resourceType != null");
Debug.Assert(this.ResourceType.IsAssignableFrom(type), "this.ResourceType.IsAssignableFrom(resourceType)");
ResourcePropertyCache propertyCache;
if (!this.resourcePropertyCache.TryGetValue(type, out propertyCache))
{
propertyCache = new ResourcePropertyCache();
propertyCache.Properties = new List <ResourceProperty>();
foreach (ResourceProperty property in type.Properties)
{
if (property.TypeKind == ResourceTypeKind.EntityType && provider.GetResourceSet(this, type, property) == null)
{
// non-visible nav properties
continue;
}
propertyCache.Properties.Add(property);
}
propertyCache.PropertiesDeclaredOnTheType = new List <ResourceProperty>();
foreach (ResourceProperty property in type.PropertiesDeclaredOnThisType)
{
if (property.TypeKind == ResourceTypeKind.EntityType && provider.GetResourceSet(this, type, property) == null)
{
// non-visible nav properties
continue;
}
propertyCache.PropertiesDeclaredOnTheType.Add(property);
}
this.resourcePropertyCache.Add(type, propertyCache);
}
return(propertyCache);
}
/// <summary>
/// Checks if the cache is populated, otherwise populates it.
/// </summary>
/// <param name="provider">Data service provider instance.</param>
/// <param name="type">Resource type in question.</param>
/// <returns>An instance of ResourcePropertyCache, with all information about the properties cached.</returns>
private ResourcePropertyCache InitializeResourcePropertyCache(DataServiceProviderWrapper provider, ResourceType type)
{
Debug.Assert(provider != null, "provider != null");
Debug.Assert(type != null, "resourceType != null");
Debug.Assert(this.ResourceType.IsAssignableFrom(type), "this.ResourceType.IsAssignableFrom(resourceType)");
ResourcePropertyCache propertyCache;
if (!this.resourcePropertyCache.TryGetValue(type, out propertyCache))
{
propertyCache = new ResourcePropertyCache();
propertyCache.Properties = new List<ResourceProperty>();
foreach (ResourceProperty property in type.Properties)
{
if (property.TypeKind == ResourceTypeKind.EntityType && provider.GetResourceSet(this, type, property) == null)
{
// non-visible nav properties
continue;
}
propertyCache.Properties.Add(property);
}
propertyCache.PropertiesDeclaredOnTheType = new List<ResourceProperty>();
foreach (ResourceProperty property in type.PropertiesDeclaredOnThisType)
{
if (property.TypeKind == ResourceTypeKind.EntityType && provider.GetResourceSet(this, type, property) == null)
{
// non-visible nav properties
continue;
}
propertyCache.PropertiesDeclaredOnTheType.Add(property);
}
this.resourcePropertyCache.Add(type, propertyCache);
}
return propertyCache;
}
/// <summary>
/// Gets the target set from the binding set and path expression.
/// </summary>
/// <param name="provider">Provider instance to resolve the association set.</param>
/// <param name="bindingSet">Binding resource set.</param>
/// <returns>Returns the target resource set for the path expression.</returns>
internal ResourceSetWrapper GetTargetSet(DataServiceProviderWrapper provider, ResourceSetWrapper bindingSet)
{
Debug.Assert(provider != null, "provider != null");
Debug.Assert(bindingSet != null, "sourceSet != null");
Debug.Assert(this.pathSegments != null && this.pathSegments.Length > 0, "InitializePathSegments() must be called before this.");
Debug.Assert(bindingSet.ResourceType.IsAssignableFrom(this.pathSegments[0].SourceType), "bindingSet.ResourceType.IsAssignableFrom(this.pathSegments[0].SourceType)");
ResourceSetWrapper resultSet = bindingSet;
for (int idx = 0; resultSet != null && idx < this.pathSegments.Length; idx++)
{
PathSegment segment = this.pathSegments[idx];
if (segment.Property != null)
{
resultSet = provider.GetResourceSet(resultSet, segment.SourceType, segment.Property);
}
#if DEBUG
else
{
Debug.Assert(idx == 0, "Path cannot end with type identifier.");
}
#endif
}
return resultSet;
}