internal override Expression VisitMethodCall(MethodCallExpression m)
{
if (m.Method.DeclaringType == typeof(Queryable))
{
if (m.Method.Name == "Where")
{
this.Visit(m.Arguments[0]);
LambdaExpression lambda = (LambdaExpression)StripQuotes(m.Arguments[1]);
this.Visit(lambda.Body);
return(m);
}
if (m.Method.Name == "OrderBy")
{
this.Visit(m.Arguments[0]);
AddSort((LambdaExpression)StripQuotes(m.Arguments[1]), true, true);
return(m);
}
if (m.Method.Name == "OrderByDescending")
{
this.Visit(m.Arguments[0]);
AddSort((LambdaExpression)StripQuotes(m.Arguments[1]), true, false);
return(m);
}
if (m.Method.Name == "ThenBy")
{
this.Visit(m.Arguments[0]);
AddSort((LambdaExpression)StripQuotes(m.Arguments[1]), false, true);
return(m);
}
if (m.Method.Name == "ThenByDescending")
{
this.Visit(m.Arguments[0]);
AddSort((LambdaExpression)StripQuotes(m.Arguments[1]), false, false);
return(m);
}
if (m.Method.Name == "Count")
{
RecurseToWhereOrRunLambda(m);
int foundCount = (int)NativeQuery.count(_coreQueryHandle);
return(Expression.Constant(foundCount));
}
if (m.Method.Name == "Any")
{
RecurseToWhereOrRunLambda(m);
var rowPtr = NativeQuery.findDirect(_coreQueryHandle, IntPtr.Zero);
var firstRow = Realm.CreateRowHandle(rowPtr, _realm.SharedRealmHandle);
bool foundAny = !firstRow.IsInvalid;
return(Expression.Constant(foundAny));
}
if (m.Method.Name == "First")
{
RecurseToWhereOrRunLambda(m);
RowHandle firstRow = null;
if (_optionalSortOrderHandle == null)
{
var rowPtr = NativeQuery.findDirect(_coreQueryHandle, IntPtr.Zero);
firstRow = Realm.CreateRowHandle(rowPtr, _realm.SharedRealmHandle);
}
else
{
using (ResultsHandle rh = _realm.MakeResultsForQuery(_retType, _coreQueryHandle, _optionalSortOrderHandle))
{
var rowPtr = NativeResults.get_row(rh, IntPtr.Zero);
firstRow = Realm.CreateRowHandle(rowPtr, _realm.SharedRealmHandle);
}
}
if (firstRow == null || firstRow.IsInvalid)
{
throw new InvalidOperationException("Sequence contains no matching element");
}
return(Expression.Constant(_realm.MakeObjectForRow(_retType, firstRow)));
}
if (m.Method.Name == "Single") // same as unsorted First with extra checks
{
RecurseToWhereOrRunLambda(m);
var rowPtr = NativeQuery.findDirect(_coreQueryHandle, IntPtr.Zero);
var firstRow = Realm.CreateRowHandle(rowPtr, _realm.SharedRealmHandle);
if (firstRow.IsInvalid)
{
throw new InvalidOperationException("Sequence contains no matching element");
}
IntPtr nextIndex = (IntPtr)(firstRow.RowIndex + 1);
var nextRowPtr = NativeQuery.findDirect(_coreQueryHandle, nextIndex);
var nextRow = Realm.CreateRowHandle(nextRowPtr, _realm.SharedRealmHandle);
if (!nextRow.IsInvalid)
{
throw new InvalidOperationException("Sequence contains more than one matching element");
}
return(Expression.Constant(_realm.MakeObjectForRow(_retType, firstRow)));
}
}
if (m.Method.DeclaringType == typeof(string))
{
NativeQuery.Operation <string> queryMethod = null;
if (m.Method == Methods.String.Contains.Value)
{
queryMethod = (q, c, v) => NativeQuery.string_contains(q, c, v, (IntPtr)v.Length);
}
else if (m.Method == Methods.String.StartsWith.Value)
{
queryMethod = (q, c, v) => NativeQuery.string_starts_with(q, c, v, (IntPtr)v.Length);
}
else if (m.Method == Methods.String.EndsWith.Value)
{
queryMethod = (q, c, v) => NativeQuery.string_ends_with(q, c, v, (IntPtr)v.Length);
}
if (queryMethod != null)
{
var member = m.Object as MemberExpression;
if (member == null)
{
throw new NotSupportedException($"The method '{m.Method}' has to be invoked on a RealmObject member");
}
var columnIndex = NativeQuery.get_column_index(_coreQueryHandle, member.Member.Name, (IntPtr)member.Member.Name.Length);
var argument = ExtractConstantValue(m.Arguments.SingleOrDefault());
if (argument == null || argument.GetType() != typeof(string))
{
throw new NotSupportedException($"The method '{m.Method}' has to be invoked with a single string constant argument or closure variable");
}
queryMethod(_coreQueryHandle, columnIndex, (string)argument);
return(m);
}
}
throw new NotSupportedException($"The method '{m.Method.Name}' is not supported");
}
