/// <summary>
/// Performs expands based on the list of strings.
/// Also populates the ExpandTypeMap that controls lazy initialization and serialization.
/// </summary>
/// <param name="queryable"></param>
/// <param name="expands"></param>
/// <param name="request"></param>
/// <returns></returns>
protected IQueryable ApplyExpansions(IQueryable queryable, IList <string> expands, HttpRequestMessage request)
{
var expandMap = GetRequestProperty(request, EXPAND_MAP_KEY) as ExpandTypeMap;
if (expandMap == null)
{
expandMap = new ExpandTypeMap();
}
var session = GetRequestProperty(request, NH_SESSION_KEY) as ISession;
if (queryable == null)
{
throw new Exception("Query cannot be null");
}
var fetcher = new NHEagerFetch(session.SessionFactory);
queryable = fetcher.ApplyExpansions(queryable, expands.ToArray(), expandMap);
if (!request.Properties.ContainsKey(EXPAND_MAP_KEY))
{
request.Properties.Add(EXPAND_MAP_KEY, expandMap);
}
return(queryable);
}
/// <summary>
/// Overrides the method in QueryHelper to perform the $expands in NHibernate.
/// Also populates the ExpandTypeMap that controls lazy initialization and serialization.
/// </summary>
/// <param name="queryable"></param>
/// <param name="expandsQueryString"></param>
/// <returns></returns>
public override IQueryable ApplyExpand(IQueryable queryable, string expandsQueryString)
{
if (string.IsNullOrWhiteSpace(expandsQueryString)) return queryable;
var session = GetSession(queryable);
var fetcher = new NHEagerFetch(session.SessionFactory);
queryable = fetcher.ApplyExpansions(queryable, expandsQueryString, expandMap);
return queryable;
}
/// <summary>
/// Performs expands based on the list of strings in queryable.GetIncludes().
/// Also populates the ExpandTypeMap that controls lazy initialization and serialization.
/// </summary>
/// <param name="queryable"></param>
/// <returns></returns>
public IQueryable ApplyExpand(IQueryableInclude queryable)
{
var expands = queryable.GetIncludes();
if (expands == null || expands.Count == 0) return queryable;
var session = GetSession(queryable);
var fetcher = new NHEagerFetch(session.SessionFactory);
var expandedQueryable = fetcher.ApplyExpansions(queryable, expands.ToArray(), expandMap);
return expandedQueryable;
}
/// <summary>
/// Recursively forces loading of each NHibernate proxy in the tree that matches an entry in the map.
/// </summary>
/// <param name="list">Top-level collection of objects</param>
/// <param name="expandMap">Properties to initialize for each type</param>
public static void InitializeList <T>(IEnumerable <T> list, params string[] expandPaths)
{
var expandMap = NHEagerFetch.MapExpansions(typeof(T), expandPaths);
var map = expandMap.map;
var depth = expandMap.maxDepth;
foreach (var el in list)
{
InitializeWithCascade(el, map, depth);
}
}
/// <summary>
/// Overrides the method in QueryHelper to perform the $expands in NHibernate.
/// Also populates the ExpandTypeMap that controls lazy initialization and serialization.
/// </summary>
/// <param name="queryable"></param>
/// <param name="expandsQueryString"></param>
/// <returns></returns>
public override IQueryable ApplyExpand(IQueryable queryable, string expandsQueryString)
{
if (string.IsNullOrWhiteSpace(expandsQueryString))
{
return(queryable);
}
var session = GetSession(queryable);
var fetcher = new NHEagerFetch(session.SessionFactory);
queryable = fetcher.ApplyExpansions(queryable, expandsQueryString, expandMap);
return(queryable);
}
/// <summary>
/// Performs expands based on the list of strings in queryable.GetIncludes().
/// Also populates the ExpandTypeMap that controls lazy initialization and serialization.
/// </summary>
/// <param name="queryable"></param>
/// <returns></returns>
public IQueryable ApplyExpand(IQueryableInclude queryable)
{
var expands = queryable.GetIncludes();
if (expands == null || expands.Count == 0)
{
return(queryable);
}
var session = GetSession(queryable);
var fetcher = new NHEagerFetch(session.SessionFactory);
var expandedQueryable = fetcher.ApplyExpansions(queryable, expands.ToArray(), expandMap);
return(expandedQueryable);
}
/// <summary>
/// Calls NHEagerFetch.ApplyExpansions
/// </summary>
/// <param name="queryable">The query to expand</param>
/// <param name="expandsQueryString">value of the $expand query parameter</param>
/// <param name="expandMap">Empty dictionary that will be populated with the names of the expanded properties for each type.</param>
/// <returns></returns>
protected IQueryable ApplyExpansions(IQueryable queryable, string expandsQueryString, ExpandTypeMap expandMap, ISessionFactory sessionFactory)
{
if (string.IsNullOrWhiteSpace(expandsQueryString))
{
return(queryable);
}
string[] expandPaths = expandsQueryString.Split(',').Select(s => s.Trim()).ToArray();
if (!expandPaths.Any())
{
throw new Exception("Expansion Paths cannot be null");
}
if (queryable == null)
{
throw new Exception("Query cannot be null");
}
var fetcher = new NHEagerFetch(sessionFactory);
return(fetcher.ApplyExpansions(queryable, expandPaths, expandMap));
}
/// <summary>
/// Calls NHEagerFetch.ApplyExpansions
/// </summary>
/// <param name="queryable">The query to expand</param>
/// <param name="expandsQueryString">value of the $expand query parameter</param>
/// <param name="expandMap">Empty dictionary that will be populated with the names of the expanded properties for each type.</param>
/// <returns></returns>
protected IQueryable ApplyExpansions(IQueryable queryable, string expandsQueryString, ExpandTypeMap expandMap, ISessionFactory sessionFactory)
{
if (string.IsNullOrWhiteSpace(expandsQueryString))
{
return queryable;
}
string[] expandPaths = expandsQueryString.Split(',').Select(s => s.Trim()).ToArray();
if (!expandPaths.Any()) throw new Exception("Expansion Paths cannot be null");
if (queryable == null) throw new Exception("Query cannot be null");
var fetcher = new NHEagerFetch(sessionFactory);
return fetcher.ApplyExpansions(queryable, expandPaths, expandMap);
}
/// <summary>
/// Performs expands based on the list of strings.
/// Also populates the ExpandTypeMap that controls lazy initialization and serialization.
/// </summary>
/// <param name="queryable"></param>
/// <param name="expands"></param>
/// <param name="request"></param>
/// <returns></returns>
protected IQueryable ApplyExpansions(IQueryable queryable, IList<string> expands, HttpRequestMessage request)
{
var expandMap = GetRequestProperty(request, EXPAND_MAP_KEY) as ExpandTypeMap;
if (expandMap == null) expandMap = new ExpandTypeMap();
var session = GetRequestProperty(request, NH_SESSION_KEY) as ISession;
if (queryable == null) throw new Exception("Query cannot be null");
var fetcher = new NHEagerFetch(session.SessionFactory);
queryable = fetcher.ApplyExpansions(queryable, expands.ToArray(), expandMap);
if (!request.Properties.ContainsKey(EXPAND_MAP_KEY))
request.Properties.Add(EXPAND_MAP_KEY, expandMap);
return queryable;
}
