public override Expression BuildExpression(Expression expression, int level, bool enforceServerSide)
{
if (_isObject)
{
if (expression == null)
{
var type = _methodCall.Method.GetGenericArguments()[0];
var nctor = (NewExpression)Expression.Find(e => e is NewExpression ne && e.Type == type && ne.Arguments?.Count > 0);
Expression expr;
if (nctor != null)
{
var members = nctor.Members
.Select(m => m is MethodInfo ? ((MethodInfo)m).GetPropertyInfo() : m)
.ToList();
expr = Expression.New(
nctor.Constructor,
members.Select(m => Expression.PropertyOrField(_unionParameter, m.Name)),
members);
}
else
{
var ta = TypeAccessor.GetAccessor(type);
expr = Expression.MemberInit(
Expression.New(ta.Type),
_members.Select(m => Expression.Bind(m.Value.MemberExpression.Member, m.Value.MemberExpression)));
}
var ex = Builder.BuildExpression(this, expr, enforceServerSide);
return(ex);
}
if (level == 0 || level == 1)
{
var levelExpression = expression.GetLevelExpression(Builder.MappingSchema, 1);
if (ReferenceEquals(expression, levelExpression) && !IsExpression(expression, 1, RequestFor.Object).Result)
{
var idx = ConvertToIndex(expression, level, ConvertFlags.Field);
var n = idx[0].Index;
if (Parent != null)
{
n = Parent.ConvertToParentIndex(n, this);
}
return(Builder.BuildSql(expression.Type, n));
}
}
}
var ret = _sequence1.BuildExpression(expression, level, enforceServerSide);
//if (level == 1)
// _sequence2.BuildExpression(expression, level);
return(ret);
}
public override Expression BuildExpression(Expression expression, int level, bool enforceServerSide)
{
if (_isObject)
{
if (expression == null)
{
var type = _methodCall.Method.GetGenericArguments()[0];
var nctor = (NewExpression)Expression.Find(e => e is NewExpression ne && e.Type == type && ne.Arguments?.Count > 0);
Expression expr;
if (nctor != null)
{
var members = nctor.Members
.Select(m => m is MethodInfo info ? info.GetPropertyInfo() : m)
.ToList();
expr = Expression.New(
nctor.Constructor,
members.Select(m => Expression.PropertyOrField(_unionParameter, m.Name)),
members);
var ex = Builder.BuildExpression(this, expr, enforceServerSide);
return(ex);
}
var new1 = Expression.Find(e => e.NodeType == ExpressionType.MemberInit && e.Type == type);
var needsRewrite = false;
if (new1 != null)
{
var new2 = _sequence2.Expression.Find(e => e.NodeType == ExpressionType.MemberInit && e.Type == type);
if (new2 == null)
{
needsRewrite = true;
}
else
{
// Comparing bindings
var init1 = (MemberInitExpression)new1;
var init2 = (MemberInitExpression)new2;
needsRewrite = init1.Bindings.Count != init2.Bindings.Count;
if (!needsRewrite)
{
var accessorDic = new Dictionary <Expression, QueryableAccessor>();
foreach (var binding in init1.Bindings)
{
if (binding.BindingType != MemberBindingType.Assignment)
{
needsRewrite = true;
break;
}
var foundBinding = init2.Bindings.FirstOrDefault(b => b.Member == binding.Member);
if (foundBinding == null || foundBinding.BindingType != MemberBindingType.Assignment)
{
needsRewrite = true;
break;
}
var assignment1 = (MemberAssignment)binding;
var assignment2 = (MemberAssignment)foundBinding;
if (!assignment1.Expression.EqualsTo(assignment2.Expression, accessorDic, null) ||
!(assignment1.Expression.NodeType == ExpressionType.MemberAccess || assignment1.Expression.NodeType == ExpressionType.Parameter))
{
needsRewrite = true;
break;
}
}
}
}
}
if (needsRewrite)
{
var ta = TypeAccessor.GetAccessor(type);
expr = Expression.MemberInit(
Expression.New(ta.Type),
_members.Select(m =>
Expression.Bind(m.Value.MemberExpression.Member, m.Value.MemberExpression)));
var ex = Builder.BuildExpression(this, expr, enforceServerSide);
return(ex);
}
else
{
var ex = _sequence1.BuildExpression(null, level, enforceServerSide);
return(ex);
}
}
if (level == 0 || level == 1)
{
var levelExpression = expression.GetLevelExpression(Builder.MappingSchema, 1);
if (ReferenceEquals(expression, levelExpression) && !IsExpression(expression, 1, RequestFor.Object).Result)
{
var idx = ConvertToIndex(expression, level, ConvertFlags.Field);
var n = idx[0].Index;
if (Parent != null)
{
n = Parent.ConvertToParentIndex(n, this);
}
return(Builder.BuildSql(expression.Type, n));
}
}
}
var ret = _sequence1.BuildExpression(expression, level, enforceServerSide);
//if (level == 1)
// _sequence2.BuildExpression(expression, level);
return(ret);
}