protected virtual Expression VisitIf(DbConditionalExpression ifx)
{
var check = Visit(ifx.Check);
var ifTrue = Visit(ifx.IfTrue);
var ifFalse = Visit(ifx.IfFalse);
return(UpdateIf(ifx, check, ifTrue, ifFalse));
}
protected DbConditionalExpression UpdateIf(DbConditionalExpression ifx, Expression check,
Expression ifTrue, Expression ifFalse)
{
if (check != ifx.Check || ifTrue != ifx.IfTrue || ifFalse != ifx.IfFalse)
{
return(new DbConditionalExpression(check, ifTrue, ifFalse));
}
return(ifx);
}
protected override Expression VisitIf(DbConditionalExpression ifx)
{
var test =
Expression.Condition(
ifx.Check,
ifx.IfTrue,
ifx.IfFalse != null
? ifx.IfFalse
: ifx.IfTrue.Type == typeof(int)
? (Expression)Expression.Property(this.provider, "RowsAffected")
: (Expression)Expression.Constant(ifx.IfTrue.Type.CreateInstance(), ifx.IfTrue.Type)
);
return(this.Visit(test));
}
protected DbConditionalExpression UpdateIf(DbConditionalExpression ifx, Expression check,
Expression ifTrue, Expression ifFalse)
{
if (check != ifx.Check || ifTrue != ifx.IfTrue || ifFalse != ifx.IfFalse)
return new DbConditionalExpression(check, ifTrue, ifFalse);
return ifx;
}
protected virtual Expression VisitIf(DbConditionalExpression ifx)
{
var check = Visit(ifx.Check);
var ifTrue = Visit(ifx.IfTrue);
var ifFalse = Visit(ifx.IfFalse);
return UpdateIf(ifx, check, ifTrue, ifFalse);
}
protected virtual bool CompareIf(DbConditionalExpression x, DbConditionalExpression y)
{
return(Compare(x.Check, y.Check) && Compare(x.IfTrue, y.IfTrue) &&
Compare(x.IfFalse, y.IfFalse));
}
protected override Expression VisitIf(DbConditionalExpression ifx)
{
throw new NotSupportedException();
}
protected virtual bool CompareIf(DbConditionalExpression x, DbConditionalExpression y)
{
return Compare(x.Check, y.Check) && Compare(x.IfTrue, y.IfTrue)
&& Compare(x.IfFalse, y.IfFalse);
}
