/// <summary>
/// Returns the LinkInfo for the given navigation property.
/// </summary>
/// <param name="propertyName">name of the navigation property </param>
/// <param name="linkInfo"> LinkInfo for the navigation propery</param>
/// <returns>true if LinkInfo is found for the navigation property, false if not found</returns>
internal bool TryGetLinkInfo(string propertyName, out LinkInfo linkInfo)
{
Util.CheckArgumentNullAndEmpty(propertyName, "propertyName");
Debug.Assert(propertyName.IndexOf('/') == -1, "propertyName.IndexOf('/') == -1");
linkInfo = null;
if (this.TransientEntityDescriptor != null && this.TransientEntityDescriptor.TryGetLinkInfo(propertyName, out linkInfo))
{
return true;
}
else if (this.relatedEntityLinks != null)
{
return this.relatedEntityLinks.TryGetValue(propertyName, out linkInfo);
}
return false;
}
/// <summary>
/// Returns LinkInfo for the given property, if it does not exists than a new one is created.
/// </summary>
/// <param name="propertyName">name of the navigation property</param>
/// <returns>LinkInfo for propertyName</returns>
private LinkInfo GetLinkInfo(String propertyName)
{
if (this.relatedEntityLinks == null)
{
this.relatedEntityLinks = new Dictionary<string, LinkInfo>(StringComparer.Ordinal);
}
LinkInfo linkInfo = null;
if (!this.relatedEntityLinks.TryGetValue(propertyName, out linkInfo))
{
linkInfo = new LinkInfo(propertyName);
this.relatedEntityLinks[propertyName] = linkInfo;
}
return linkInfo;
}
/// <summary>
/// Merges the given linkInfo to the entity descriptor,
/// overwrites existing links with new ones (coming from the payload)
/// </summary>
/// <param name="linkInfo">linkInfo</param>
internal void MergeLinkInfo(LinkInfo linkInfo)
{
if (this.relatedEntityLinks == null)
{
this.relatedEntityLinks = new Dictionary<string, LinkInfo>(StringComparer.Ordinal);
}
LinkInfo existingLinkInfo = null;
if (!this.relatedEntityLinks.TryGetValue(linkInfo.Name, out existingLinkInfo))
{
this.relatedEntityLinks[linkInfo.Name] = linkInfo;
}
else
{
// overwrite existing links with new ones (coming from the payload).
if (linkInfo.AssociationLink != null)
{
existingLinkInfo.AssociationLink = linkInfo.AssociationLink;
}
if (linkInfo.NavigationLink != null)
{
existingLinkInfo.NavigationLink = linkInfo.NavigationLink;
}
}
}
