private object Execute <T>(RestQueryableTreeParser parser, bool executeAsync)
{
LambdaExpression clientSideSelectPart;
var uri = BuildUri(parser, out clientSideSelectPart);
if (parser.ResultMode == RestQueryableTreeParser.ResultModeType.ToUri)
{
return(new Uri(uri));
}
var requestOptions = RequestOptions.Create <T>(x => parser.RequestOptionActions.ForEach(y => y(x)));
if (parser.ResultMode == RestQueryableTreeParser.ResultModeType.ToJson)
{
return(Client.Get <JToken>(uri, requestOptions));
}
var queryProjection = parser.Projection;
if (clientSideSelectPart != null)
{
return(executeWithClientSelectPart.Invoke(clientSideSelectPart.Parameters[0].Type,
clientSideSelectPart.ReturnType,
this,
uri,
queryProjection,
clientSideSelectPart,
requestOptions,
executeAsync));
}
return(Execute <T, T>(uri, queryProjection, null, requestOptions, executeAsync));
}
private static void SetProjection(RestQueryableTreeParser parser, UriQueryBuilder builder)
{
string projection = null;
switch (parser.Projection)
{
case RestQueryableTreeParser.QueryProjection.First:
case RestQueryableTreeParser.QueryProjection.FirstLazy:
projection = "first";
break;
case RestQueryableTreeParser.QueryProjection.FirstOrDefault:
projection = "firstordefault";
break;
case RestQueryableTreeParser.QueryProjection.Single:
projection = "single";
break;
case RestQueryableTreeParser.QueryProjection.SingleOrDefault:
projection = "singleordefault";
break;
case RestQueryableTreeParser.QueryProjection.Last:
projection = "last";
break;
case RestQueryableTreeParser.QueryProjection.LastOrDefault:
projection = "lastordefault";
break;
case RestQueryableTreeParser.QueryProjection.Max:
projection = "max";
break;
case RestQueryableTreeParser.QueryProjection.Min:
projection = "min";
break;
//case RestQueryableTreeParser.QueryProjection.Any:
// TODO: Remove backwards compatibility at some point in the future.
// HACK for backwards compatibility. Any is not supported by old versions of pomona server
// projection = "any";
// break;
case RestQueryableTreeParser.QueryProjection.Any:
case RestQueryableTreeParser.QueryProjection.Count:
projection = "count";
break;
case RestQueryableTreeParser.QueryProjection.Sum:
projection = "sum";
break;
}
if (projection != null)
{
builder.AppendParameter("$projection", projection);
}
}
public override object Execute(Expression expression, Type resultType)
{
var queryTreeParser = new RestQueryableTreeParser();
queryTreeParser.Visit(expression);
var executeAsync = resultType != null && typeof(Task).IsAssignableFrom(resultType);
return(executeGenericMethod.Invoke(queryTreeParser.SelectReturnType, this, queryTreeParser, executeAsync));
}
private string BuildUri(RestQueryableTreeParser parser, out LambdaExpression clientSideSelectPart)
{
clientSideSelectPart = null;
var builder = new UriQueryBuilder();
var resourceInfo = Client.GetResourceInfoForType(parser.ElementType);
if (!resourceInfo.IsUriBaseType)
{
builder.AppendParameter("$oftype", resourceInfo.JsonTypeName);
}
SetProjection(parser, builder);
if (parser.WherePredicate != null)
{
builder.AppendExpressionParameter("$filter", parser.WherePredicate);
}
if (parser.OrderKeySelectors.Count > 0)
{
builder.AppendExpressionParameter <QueryOrderByBuilder>("$orderby", Expression.Constant(parser.OrderKeySelectors));
}
if (parser.GroupByKeySelector != null)
{
builder.AppendExpressionParameter <QuerySelectorBuilder>("$groupby", parser.GroupByKeySelector);
}
if (parser.SelectExpression != null)
{
var selectNode = parser.SelectExpression.Visit <ClientServerSplittingSelectBuilder>();
var splitSelect = selectNode as ClientServerSplitSelectExpression;
if (splitSelect != null)
{
clientSideSelectPart = splitSelect.ClientSideExpression;
selectNode = splitSelect.ServerExpression;
}
builder.AppendParameter("$select", selectNode);
}
if (parser.Projection == RestQueryableTreeParser.QueryProjection.Enumerable)
{
if (parser.SkipCount.HasValue)
{
builder.AppendParameter("$skip", parser.SkipCount.Value);
}
builder.AppendParameter("$top", parser.TakeCount.GetValueOrDefault(int.MaxValue));
}
var expandedPaths = parser.ExpandedPaths;
if (!string.IsNullOrEmpty(expandedPaths))
{
builder.AppendParameter("$expand", expandedPaths);
}
if (parser.IncludeTotalCount)
{
builder.AppendParameter("$totalcount", "true");
}
return(parser.RepositoryUri + "?" + builder);
}