/// <summary>
/// core build query function. start point
/// </summary>
/// <param name="expr"></param>
/// <param name="paginate"></param>
/// <param name="isCountQuery"></param>
/// <param name="remoteGrouping"></param>
/// <returns></returns>
Expression BuildCore(Expression expr, bool paginate = false, bool isCountQuery = false, bool remoteGrouping = false)
{
var queryableType = typeof(Queryable);
var genericTypeArguments = new[] { typeof(T) };
// call expression with filter
if (_loadOptions.HasFilter)
{
expr = Expression.Call(queryableType, "Where", genericTypeArguments, expr, Expression.Quote(new FilterExpressionCompiler <T>(_guardNulls).Compile(_loadOptions.Filter)));
}
if (!isCountQuery)
{
if (!remoteGrouping)
{
if (_loadOptions.HasAnySort)
{
expr = new SortExpressionCompiler <T>(_guardNulls).Compile(expr, _loadOptions.GetFullSort());
}
if (_loadOptions.HasAnySelect && _loadOptions.UseRemoteSelect)
{
expr = new SelectExpressionCompiler <T>(_guardNulls).Compile(expr, _loadOptions.GetFullSelect());
#if (NET40)
genericTypeArguments = expr.Type.GetGenericArguments();
#elif (NETSTANDARD1_0 || NETSTANDARD1_1 || NETSTANDARD1_2 || NETSTANDARD1_3 || NETSTANDARD1_4 || NETSTANDARD1_5 || NETSTANDARD1_6 || NETSTANDARD2_0)
genericTypeArguments = expr.Type.GetTypeInfo().IsGenericTypeDefinition ? expr.Type.GetTypeInfo().GenericTypeParameters : expr.Type.GetTypeInfo().GenericTypeArguments;
#elif (NETCOREAPP1_0 || NETCOREAPP1_1 || NETCOREAPP2_0 || NETCOREAPP2_1)
IEnumerable <Type> arguments = expr.Type.IsGenericTypeDefinition
? expr.Type.GenericTypeParameters
: expr.Type.GenericTypeArguments;
genericTypeArguments = arguments.Select(x => x.GetTypeInfo()).ToArray();
#endif
}
}
else
{
expr = new RemoteGroupExpressionCompiler <T>(_guardNulls, _loadOptions.Group, _loadOptions.TotalSummary, _loadOptions.GroupSummary).Compile(expr);
}
if (paginate)
{
if (_loadOptions.Skip > 0)
{
expr = Expression.Call(queryableType, "Skip", genericTypeArguments, expr, Expression.Constant(_loadOptions.Skip));
}
if (_loadOptions.Take > 0)
{
expr = Expression.Call(queryableType, "Take", genericTypeArguments, expr, Expression.Constant(_loadOptions.Take));
}
}
}
if (isCountQuery)
{
expr = Expression.Call(queryableType, "Count", genericTypeArguments, expr);
}
return(expr);
}
Expression BuildCore(Expression expr, bool paginate = false, bool isCountQuery = false, bool remoteGrouping = false)
{
var queryableType = typeof(Queryable);
var genericTypeArguments = new[] { typeof(T) };
if (_loadOptions.HasFilter)
{
expr = Expression.Call(queryableType, "Where", genericTypeArguments, expr, Expression.Quote(new FilterExpressionCompiler <T>(_guardNulls).Compile(_loadOptions.Filter)));
}
if (!isCountQuery)
{
if (!remoteGrouping)
{
if (_loadOptions.HasAnySort)
{
expr = new SortExpressionCompiler <T>(_guardNulls).Compile(expr, _loadOptions.GetFullSort());
}
if (_loadOptions.HasSelect)
{
expr = new SelectExpressionCompiler <T>(_guardNulls).Compile(expr, _loadOptions.Select);
genericTypeArguments = expr.Type.GetGenericArguments();
}
}
else
{
expr = new RemoteGroupExpressionCompiler <T>(_loadOptions.Group, _loadOptions.TotalSummary, _loadOptions.GroupSummary).Compile(expr);
}
if (paginate)
{
if (_loadOptions.Skip > 0)
{
expr = Expression.Call(queryableType, "Skip", genericTypeArguments, expr, Expression.Constant(_loadOptions.Skip));
}
if (_loadOptions.Take > 0)
{
expr = Expression.Call(queryableType, "Take", genericTypeArguments, expr, Expression.Constant(_loadOptions.Take));
}
}
}
if (isCountQuery)
{
expr = Expression.Call(queryableType, "Count", genericTypeArguments, expr);
}
return(expr);
}
Expression BuildCore(ParameterExpression param, bool paginate = false, bool isCountQuery = false, bool remoteGrouping = false)
{
var queryableType = typeof(Queryable);
var genericTypeArguments = new[] { typeof(T) };
Expression body = param;
if (_loadOptions.Filter != null)
{
body = Expression.Call(queryableType, "Where", genericTypeArguments, body, new FilterExpressionCompiler <T>(_guardNulls).Compile(_loadOptions.Filter));
}
if (!isCountQuery)
{
if (!remoteGrouping)
{
if (_loadOptions.HasAnySort)
{
body = new SortExpressionCompiler <T>(_guardNulls).Compile(body, _loadOptions.GetFullSort());
}
}
else
{
body = new RemoteGroupExpressionCompiler <T>(_loadOptions.Group, _loadOptions.TotalSummary, _loadOptions.GroupSummary).Compile(body);
}
if (paginate)
{
if (_loadOptions.Skip > 0)
{
body = Expression.Call(queryableType, "Skip", genericTypeArguments, body, Expression.Constant(_loadOptions.Skip));
}
if (_loadOptions.Take > 0)
{
body = Expression.Call(queryableType, "Take", genericTypeArguments, body, Expression.Constant(_loadOptions.Take));
}
}
}
if (isCountQuery)
{
body = Expression.Call(queryableType, "Count", genericTypeArguments, body);
}
return(body);
}