public UnionContext(SubQueryContext sequence1, SubQueryContext sequence2, MethodCallExpression methodCall)
: base(sequence1)
{
_methodCall = methodCall;
_isObject =
sequence1.IsExpression(null, 0, RequestFor.Object).Result ||
sequence2.IsExpression(null, 0, RequestFor.Object).Result;
if (_isObject)
{
var type = _methodCall.Method.GetGenericArguments()[0];
_unionParameter = Expression.Parameter(type, "t");
}
Init(sequence1, sequence2);
}
void Init(SubQueryContext sequence1, SubQueryContext sequence2)
{
var info1 = sequence1.ConvertToIndex(null, 0, ConvertFlags.All).ToList();
var info2 = sequence2.ConvertToIndex(null, 0, ConvertFlags.All).ToList();
if (!_isObject)
{
return;
}
var members = new List <UnionMember>();
foreach (var info in info1)
{
if (info.Members.Count == 0)
{
throw new InvalidOperationException();
}
var member = new Member
{
SequenceInfo = info,
MemberExpression = Expression.MakeMemberAccess(_unionParameter, info.Members[0])
};
//if (sequence1.IsExpression(member.MemberExpression, 1, RequestFor.Object).Result)
// throw new LinqException("Types in {0} are constructed incompatibly.", _methodCall.Method.Name);
members.Add(new UnionMember {
Member = member, Info1 = info
});
}
foreach (var info in info2)
{
if (info.Members.Count == 0)
{
throw new InvalidOperationException();
}
var em = members.FirstOrDefault(m =>
m.Member.SequenceInfo != null &&
m.Member.SequenceInfo.CompareMembers(info));
if (em == null)
{
var member = new Member {
MemberExpression = Expression.MakeMemberAccess(_unionParameter, info.Members[0])
};
if (sequence2.IsExpression(member.MemberExpression, 1, RequestFor.Object).Result)
{
throw new LinqException("Types in {0} are constructed incompatibly.", _methodCall.Method.Name);
}
members.Add(new UnionMember {
Member = member, Info2 = info
});
}
else
{
em.Info2 = info;
}
}
sequence1.SqlQuery.Select.Columns.Clear();
sequence2.SqlQuery.Select.Columns.Clear();
for (var i = 0; i < members.Count; i++)
{
var member = members[i];
if (member.Info1 == null)
{
member.Info1 = new SqlInfo(member.Info2.Members)
{
Sql = new SqlValue(null),
Query = sequence1.SqlQuery,
};
member.Member.SequenceInfo = member.Info1;
}
if (member.Info2 == null)
{
member.Info2 = new SqlInfo(member.Info1.Members)
{
Sql = new SqlValue(null),
Query = sequence2.SqlQuery,
};
}
sequence1.SqlQuery.Select.Columns.Add(new SqlQuery.Column(sequence1.SqlQuery, member.Info1.Sql));
sequence2.SqlQuery.Select.Columns.Add(new SqlQuery.Column(sequence2.SqlQuery, member.Info2.Sql));
member.Member.SequenceInfo.Index = i;
//member.Info1.Index = i;
//member.Info2.Index = i;
_members[member.Member.MemberExpression.Member] = member.Member;
}
foreach (var key in sequence1.ColumnIndexes.Keys.ToList())
{
sequence1.ColumnIndexes[key] = sequence1.SqlQuery.Select.Add(key);
}
foreach (var key in sequence2.ColumnIndexes.Keys.ToList())
{
sequence2.ColumnIndexes[key] = sequence2.SqlQuery.Select.Add(key);
}
/*
* if (_isObject)
* {
* foreach (var info in info1)
* {
* if (info.Member == null)
* throw new InvalidOperationException();
*
* CheckAndAddMember(sequence1, sequence2, info);
* }
*
* info2 = sequence2.ConvertToIndex(null, 0, ConvertFlags.All).OrderBy(_ => _.Index).ToList();
*
* if (info1.Count != info2.Count)
* {
* for (var i = 0; i < info2.Count; i++)
* {
* if (i < info1.Count)
* {
* if (info1[i].Index != info2[i].Index)
* throw new InvalidOperationException();
* }
* else
* {
* CheckAndAddMember(sequence2, sequence1, info2[i]);
* }
* }
* }
* }
* else
* sequence2.ConvertToIndex(null, 0, ConvertFlags.All).OrderBy(_ => _.Index).ToList();
*/
}