public bool TryHandle(
FilterOperation operation,
IInputType type,
IValueNode value,
IQueryableFilterVisitorContext context,
[NotNullWhen(true)] out Expression?expression)
{
if (operation.Type == typeof(bool) && type.IsInstanceOfType(value))
{
Expression property = context.GetInstance();
if (!operation.IsSimpleArrayType())
{
property = Expression.Property(context.GetInstance(), operation.Property);
}
object parserValue = type.ParseLiteral(value);
switch (operation.Kind)
{
case FilterOperationKind.Equals:
expression = FilterExpressionBuilder.Equals(
property, parserValue);
return(true);
case FilterOperationKind.NotEquals:
expression = FilterExpressionBuilder.NotEquals(
property, parserValue);
return(true);
}
}
expression = null;
return(false);
}
public bool TryHandle(
FilterOperation operation,
IInputType type,
IValueNode value,
Expression instance,
ITypeConversion converter,
out Expression expression)
{
if (operation.Type == typeof(bool) &&
type.IsInstanceOfType(value))
{
MemberExpression property =
Expression.Property(instance, operation.Property);
object parserValue = type.ParseLiteral(value);
switch (operation.Kind)
{
case FilterOperationKind.Equals:
expression = FilterExpressionBuilder.Equals(
property, parserValue);
return(true);
case FilterOperationKind.NotEquals:
expression = FilterExpressionBuilder.NotEquals(
property, parserValue);
return(true);
}
}
expression = null;
return(false);
}
public static bool NotEquals(
FilterOperation operation,
IInputType type,
IValueNode value,
IQueryableFilterVisitorContext context,
[NotNullWhen(true)] out Expression?result)
{
object parsedValue = type.ParseLiteral(value);
if (!operation.IsNullable && parsedValue == null)
{
context.ReportError(
ErrorHelper.CreateNonNullError(operation, type, value, context));
result = null;
return(false);
}
if (operation.Type == typeof(IComparable) &&
type.IsInstanceOfType(value))
{
Expression property = GetProperty(operation, context);
parsedValue = ParseValue(parsedValue, operation, type, context);
result = FilterExpressionBuilder.NotEquals(property, parsedValue);
return(true);
}
else
{
throw new InvalidOperationException();
}
}
protected override bool TryCreateExpression(
FilterOperation operation,
Expression property,
Func <object> parseValue,
[NotNullWhen(true)] out Expression?expression)
{
switch (operation.Kind)
{
case FilterOperationKind.Equals:
expression = FilterExpressionBuilder.Equals(
property, parseValue());
return(true);
case FilterOperationKind.NotEquals:
expression = FilterExpressionBuilder.NotEquals(
property, parseValue());
return(true);
default:
expression = null;
return(false);
}
}
protected override bool TryCreateExpression(
FilterOperation operation,
MemberExpression property,
object parsedValue, out
Expression expression)
{
switch (operation.Kind)
{
case FilterOperationKind.Equals:
expression = FilterExpressionBuilder.Equals(
property, parsedValue);
return(true);
case FilterOperationKind.NotEquals:
expression = FilterExpressionBuilder.NotEquals(
property, parsedValue);
return(true);
default:
expression = null;
return(false);
}
}