public IQueryable CreateQuery(Expression expression)
{
Util.CheckArgumentNull(expression, "expression");
Type et = TypeSystem.GetElementType(expression.Type);
Type qt = typeof(DataServiceQuery <> .DataServiceOrderedQuery).MakeGenericType(et);
object[] args = new object[] { expression, this };
ConstructorInfo ci = qt.GetConstructor(
BindingFlags.NonPublic | BindingFlags.Instance,
null,
new Type[] { typeof(Expression), typeof(DataServiceQueryProvider) },
null);
return((IQueryable)Util.ConstructorInvoke(ci, args));
}
internal static bool IsCollectionProducingExpression(Expression e)
{
if (TypeSystem.FindIEnumerable(e.Type) != null)
{
Type elementType = TypeSystem.GetElementType(e.Type);
Debug.Assert(elementType != null, "elementType == null");
Type dscType = WebUtil.GetDataServiceCollectionOfT(elementType);
if (typeof(List <>).MakeGenericType(elementType).IsAssignableFrom(e.Type) ||
(dscType != null && dscType.IsAssignableFrom(e.Type)))
{
return(true);
}
}
return(false);
}
/// <summary>
/// Cast ResourceSetExpression to new type
/// </summary>
internal override ResourceExpression CreateCloneWithNewType(Type type)
{
ResourceSetExpression rse = new ResourceSetExpression(
type,
this.source,
this.MemberExpression,
TypeSystem.GetElementType(type),
this.ExpandPaths.ToList(),
this.CountOption,
this.CustomQueryOptions.ToDictionary(kvp => kvp.Key, kvp => kvp.Value),
this.Projection);
rse.keyFilter = this.keyFilter;
rse.sequenceQueryOptions = this.sequenceQueryOptions;
rse.transparentScope = this.transparentScope;
return(rse);
}
internal void AppendToPath(PropertyInfo pi)
{
Debug.Assert(pi != null, "pi != null");
StringBuilder sb;
Type t = TypeSystem.GetElementType(pi.PropertyType);
if (ClientType.CheckElementTypeIsEntity(t))
{
// an entity, so need to append to expand path also
sb = expandPaths.Last();
Debug.Assert(sb != null); // there should always be an expand path because must call StartNewPath first.
if (sb.Length > 0)
{
sb.Append(UriHelper.FORWARDSLASH);
}
sb.Append(pi.Name);
}
sb = projectionPaths.Last();
Debug.Assert(sb != null, "sb != null -- we are always building paths in the context of a parameter");
RemoveEntireEntityMarkerIfPresent(sb);
if (sb.Length > 0)
{
sb.Append(UriHelper.FORWARDSLASH);
}
sb.Append(pi.Name);
if (ClientType.CheckElementTypeIsEntity(t))
{
AddEntireEntityMarker(sb);
}
}
internal void AppendToPath(PropertyInfo pi)
{
Debug.Assert(pi != null, "pi != null");
StringBuilder sb;
Type t = TypeSystem.GetElementType(pi.PropertyType);
if (ClientType.CheckElementTypeIsEntity(t))
{
sb = expandPaths.Last();
Debug.Assert(sb != null);
if (sb.Length > 0)
{
sb.Append(UriHelper.FORWARDSLASH);
}
sb.Append(pi.Name);
}
sb = projectionPaths.Last();
Debug.Assert(sb != null, "sb != null -- we are always building paths in the context of a parameter");
RemoveEntireEntityMarkerIfPresent(sb);
if (sb.Length > 0)
{
sb.Append(UriHelper.FORWARDSLASH);
}
sb.Append(pi.Name);
if (ClientType.CheckElementTypeIsEntity(t))
{
AddEntireEntityMarker(sb);
}
}
/// <summary>Create a request for a specific Uri</summary>
/// <param name="requestUri">The URI for the request.</param>
public DataServiceRequest(Uri requestUri)
{
Util.CheckArgumentNull(requestUri, "requestUri");
Type elementType = typeof(TElement);
elementType = ClientConvert.IsKnownType(elementType) ? elementType : TypeSystem.GetElementType(elementType);
this.queryComponents = new QueryComponents(requestUri, Util.DataServiceVersionEmpty, elementType, null, null);
}
internal override ResourceExpression CreateCloneWithNewType(Type type)
{
return(this.CreateCloneWithNewTypes(type, TypeSystem.GetElementType(type)));
}
internal override ResourceExpression CreateCloneWithNewType(Type type)
{
return(new NavigationPropertySingletonExpression(type, base.source, this.MemberExpression, TypeSystem.GetElementType(type), this.ExpandPaths.ToList <string>(), this.CountOption, this.CustomQueryOptions.ToDictionary <KeyValuePair <ConstantExpression, ConstantExpression>, ConstantExpression, ConstantExpression>(kvp => kvp.Key, kvp => kvp.Value), base.Projection, base.ResourceTypeAs, base.UriVersion));
}
/// <summary>The QueryComponents associated with this request</summary>
/// <param name="model">The client model.</param>
/// <returns>an instance of QueryComponents.</returns>
internal override QueryComponents QueryComponents(ClientEdmModel model)
{
if (this.queryComponents == null)
{
Type elementType = typeof(TElement);
// for 1..* navigation properties we need the type of the entity of the collection that is being navigated to. Otherwise we use TElement.
elementType = PrimitiveType.IsKnownType(elementType) || WebUtil.IsCLRTypeCollection(elementType, model) ? elementType : TypeSystem.GetElementType(elementType);
this.queryComponents = new QueryComponents(this.requestUri, Util.DataServiceVersionEmpty, elementType, null, null);
}
return(this.queryComponents);
}
internal override System.Data.Services.Client.QueryComponents QueryComponents(DataServiceProtocolVersion maxProtocolVersion)
{
if (this.queryComponents == null)
{
Type type = typeof(TElement);
type = (PrimitiveType.IsKnownType(type) || WebUtil.IsCLRTypeCollection(type, maxProtocolVersion)) ? type : TypeSystem.GetElementType(type);
this.queryComponents = new System.Data.Services.Client.QueryComponents(this.requestUri, Util.DataServiceVersionEmpty, type, null, null);
}
return(this.queryComponents);
}
