protected override Expression BuildExpressionInternal(BuildExpressionContext context)
{
Expression baseExpression = parent.BuildExpression(context);
Expression result = Expression.TypeAs(baseExpression.ExtractEntity(false), entityType);
return(result.BuildLite());
}
protected override Expression BuildExpressionInternal(BuildExpressionContext context)
{
var parentResult = parent.BuildExpression(context);
var result = Expression.Call(miCount.MakeGenericMethod(parentResult.Type.ElementType() !), parentResult);
return(result.Nullify());
}
protected override Expression BuildExpressionInternal(BuildExpressionContext context)
{
var result = parent.BuildExpression(context);
var prop =
MemberInfo is PropertyInfo pi ? (Expression)Expression.Property(result.UnNullify(), pi) :
MemberInfo is MethodInfo mi ? (mi.IsStatic ? Expression.Call(null, mi, result.UnNullify()) : Expression.Call(result.UnNullify(), mi)) :
throw new UnexpectedValueException(MemberInfo);
return(Expression.Call(miInSql.MakeGenericMethod(prop.Type), prop).Nullify());
}
protected override Expression BuildExpressionInternal(BuildExpressionContext context)
{
var exp = parent.BuildExpression(context);
var ut = parent.Type.UnNullify();
var mi =
ut == typeof(DateTime) ? GetMethodInfoDateTime(this.Name) :
ut == typeof(DateOnly) ? GetMethodInfoDateOnly(this.Name) :
ut == typeof(TimeOnly) ? GetMethodInfoTimeOnly(this.Name) :
ut == typeof(TimeSpan) ? GetMethodInfoTimeSpan(this.Name) :
throw new UnexpectedValueException(ut);
return(Expression.Call(mi, exp.UnNullify()).Nullify());
}
public static LambdaExpression CreateOrderLambda(QueryToken token, BuildExpressionContext ctx)
{
foreach (var ad in OrderAdapters)
{
var func = ad(token);
if (func != null)
{
var b = func(ctx);
return(Expression.Lambda(b, ctx.Parameter));
}
}
var body = token.BuildExpression(ctx);
return(Expression.Lambda(body, ctx.Parameter));
}
protected override Expression BuildExpressionInternal(BuildExpressionContext context)
{
Expression baseExpression = parent.BuildExpression(context);
if (IsCollection(this.Parent !.Type))
{
var miGen = baseExpression.Type.IsInstantiationOf(typeof(IQueryable <>)) ? miAnyQ : miAnyE;
return(Expression.Call(miGen.MakeGenericMethod(baseExpression.Type.ElementType() !), baseExpression));
}
var result = Expression.NotEqual(baseExpression, Expression.Constant(null, baseExpression.Type.Nullify()));
if (baseExpression.Type == typeof(string))
{
result = Expression.And(result, Expression.NotEqual(baseExpression, Expression.Constant("")));
}
return(result.Nullify());
}
public Expression <Func <object, V> > GetLambdaExpression <V>(QueryToken token)
{
return(Expression.Lambda <Func <object, V> >(Expression.Convert(token.BuildExpression(Context), typeof(V)), Context.Parameter));
}
protected override Expression BuildExpressionInternal(BuildExpressionContext context)
{
var baseExpression = parent.BuildExpression(context);
return(Expression.Call(baseExpression, miToString));
}
protected override Expression BuildExpressionInternal(BuildExpressionContext context)
{
var exp = parent.BuildExpression(context);
return(RoundingExpressionGenerator.RoundExpression(exp, this.StepSize, RoundingType.Ceil));
}
protected override Expression BuildExpressionInternal(BuildExpressionContext context)
{
var exp = parent.BuildExpression(context);
return(Expression.Modulo(Expression.Convert(exp, typeof(int)), Expression.Constant(Divisor)).Nullify());
}
protected override Expression BuildExpressionInternal(BuildExpressionContext context)
{
var exp = parent.BuildExpression(context);
return(Expression.Property(exp.UnNullify(), miDate).Nullify());
}