public IPredicateVisitor Convert(Expression expression, IPredicateVisitorFactory predicateVisitorFactory)
{
MethodCallExpression methodCallExpression = expression as MethodCallExpression;
if (methodCallExpression == null)
{
return(null);
}
if (methodCallExpression.Arguments[0] == null)
{
throw new NotSupportedException();
}
IPredicateVisitor innerPredicateVisitor = predicateVisitorFactory.Create(methodCallExpression.Arguments[0]);
var methodName = methodCallExpression.Method.Name;
var dynamicInvoke = Expression.Lambda(methodCallExpression.Arguments[0], null).Compile().DynamicInvoke(null);
if (dynamicInvoke is DateTime dateTime)
{
return(methodName == "AsDate" ?
new ConstantPredicateVisitor(dateTime.ToUtcIso8601(true).WrapInQuotes()) :
new ConstantPredicateVisitor(dateTime.ToUtcIso8601().WrapInQuotes()));
}
if (dynamicInvoke is TimeSpan timeSpan && methodName == "AsTime")
{
return(new ConstantPredicateVisitor(timeSpan.ToIso8601().WrapInQuotes()));
}
return(new ConstantPredicateVisitor(innerPredicateVisitor.Render().WrapInQuotes()));
}
private string RenderSide(IPredicateVisitor side)
{
string result = side.Render();
if (this.HasLowerPrecedenceOperator(side))
{
result = $"({result})";
}
return(result);
}
public string Render(Expression expression)
{
IPredicateVisitor predicateVisitor = this.predicateVisitorFactory.Create(expression);
return(predicateVisitor.Render());
}