internal virtual SqlMemberAssign VisitMemberAssign(SqlMemberAssign ma) {
ma.Expression = this.VisitExpression(ma.Expression);
return ma;
}
private SqlExpression VisitMemberInit(MemberInitExpression init)
{
MetaType mt = _services.Model.GetMetaType(init.Type);
if(mt.IsEntity)
{
throw Error.CannotMaterializeEntityType(init.Type);
}
SqlExpression[] args = null;
NewExpression qn = init.NewExpression;
if(qn.Type == typeof(decimal) && qn.Arguments.Count == 1)
{
return this.VisitCast(Expression.Convert(qn.Arguments[0], typeof(decimal))) as SqlExpression;
}
if(qn.Arguments.Count > 0)
{
args = new SqlExpression[qn.Arguments.Count];
for(int i = 0, n = args.Length; i < n; i++)
{
args[i] = this.VisitExpression(qn.Arguments[i]);
}
}
int cBindings = init.Bindings.Count;
SqlMemberAssign[] members = new SqlMemberAssign[cBindings];
int[] ordinal = new int[members.Length];
for(int i = 0; i < cBindings; i++)
{
MemberAssignment mb = init.Bindings[i] as MemberAssignment;
if(mb != null)
{
SqlExpression expr = this.VisitExpression(mb.Expression);
SqlMemberAssign sma = new SqlMemberAssign(mb.Member, expr);
members[i] = sma;
ordinal[i] = mt.GetDataMember(mb.Member).Ordinal;
}
else
{
throw Error.UnhandledBindingType(init.Bindings[i].BindingType);
}
}
// put members in type's declaration order
Array.Sort(ordinal, members, 0, members.Length);
SqlNew tb = _nodeFactory.New(mt, qn.Constructor, args, PropertyOrFieldOf(qn.Members), members, _dominatingExpression);
return tb;
}
private SqlExpression ExpandTogether(List<SqlExpression> exprs)
{
switch(exprs[0].NodeType)
{
case SqlNodeType.MethodCall:
{
SqlMethodCall[] mcs = new SqlMethodCall[exprs.Count];
for(int i = 0; i < mcs.Length; ++i)
{
mcs[i] = (SqlMethodCall)exprs[i];
}
List<SqlExpression> expandedArgs = new List<SqlExpression>();
for(int i = 0; i < mcs[0].Arguments.Count; ++i)
{
List<SqlExpression> args = new List<SqlExpression>();
for(int j = 0; j < mcs.Length; ++j)
{
args.Add(mcs[j].Arguments[i]);
}
SqlExpression expanded = this.ExpandTogether(args);
expandedArgs.Add(expanded);
}
return factory.MethodCall(mcs[0].Method, mcs[0].Object, expandedArgs.ToArray(), mcs[0].SourceExpression);
}
case SqlNodeType.ClientCase:
{
// Are they all the same?
SqlClientCase[] scs = new SqlClientCase[exprs.Count];
scs[0] = (SqlClientCase)exprs[0];
for(int i = 1; i < scs.Length; ++i)
{
scs[i] = (SqlClientCase)exprs[i];
}
// Expand expressions together.
List<SqlExpression> expressions = new List<SqlExpression>();
for(int i = 0; i < scs.Length; ++i)
{
expressions.Add(scs[i].Expression);
}
SqlExpression expression = this.ExpandTogether(expressions);
// Expand individual expressions together.
List<SqlClientWhen> whens = new List<SqlClientWhen>();
for(int i = 0; i < scs[0].Whens.Count; ++i)
{
List<SqlExpression> scos = new List<SqlExpression>();
for(int j = 0; j < scs.Length; ++j)
{
SqlClientWhen when = scs[j].Whens[i];
scos.Add(when.Value);
}
whens.Add(new SqlClientWhen(scs[0].Whens[i].Match, this.ExpandTogether(scos)));
}
return new SqlClientCase(scs[0].ClrType, expression, whens, scs[0].SourceExpression);
}
case SqlNodeType.TypeCase:
{
// Are they all the same?
SqlTypeCase[] tcs = new SqlTypeCase[exprs.Count];
tcs[0] = (SqlTypeCase)exprs[0];
for(int i = 1; i < tcs.Length; ++i)
{
tcs[i] = (SqlTypeCase)exprs[i];
}
// Expand discriminators together.
List<SqlExpression> discriminators = new List<SqlExpression>();
for(int i = 0; i < tcs.Length; ++i)
{
discriminators.Add(tcs[i].Discriminator);
}
SqlExpression discriminator = this.ExpandTogether(discriminators);
// Write expanded discriminators back in.
for(int i = 0; i < tcs.Length; ++i)
{
tcs[i].Discriminator = discriminators[i];
}
// Expand individual type bindings together.
List<SqlTypeCaseWhen> whens = new List<SqlTypeCaseWhen>();
for(int i = 0; i < tcs[0].Whens.Count; ++i)
{
List<SqlExpression> scos = new List<SqlExpression>();
for(int j = 0; j < tcs.Length; ++j)
{
SqlTypeCaseWhen when = tcs[j].Whens[i];
scos.Add(when.TypeBinding);
}
SqlExpression expanded = this.ExpandTogether(scos);
whens.Add(new SqlTypeCaseWhen(tcs[0].Whens[i].Match, expanded));
}
return factory.TypeCase(tcs[0].ClrType, tcs[0].RowType, discriminator, whens, tcs[0].SourceExpression);
}
case SqlNodeType.New:
{
// first verify all are similar client objects...
SqlNew[] cobs = new SqlNew[exprs.Count];
cobs[0] = (SqlNew)exprs[0];
for(int i = 1, n = exprs.Count; i < n; i++)
{
if(exprs[i] == null || exprs[i].NodeType != SqlNodeType.New)
throw Error.UnionIncompatibleConstruction();
cobs[i] = (SqlNew)exprs[1];
if(cobs[i].Members.Count != cobs[0].Members.Count)
throw Error.UnionDifferentMembers();
for(int m = 0, mn = cobs[0].Members.Count; m < mn; m++)
{
if(cobs[i].Members[m].Member != cobs[0].Members[m].Member)
{
throw Error.UnionDifferentMemberOrder();
}
}
}
SqlMemberAssign[] bindings = new SqlMemberAssign[cobs[0].Members.Count];
for(int m = 0, mn = bindings.Length; m < mn; m++)
{
List<SqlExpression> mexprs = new List<SqlExpression>();
for(int i = 0, n = exprs.Count; i < n; i++)
{
mexprs.Add(cobs[i].Members[m].Expression);
}
bindings[m] = new SqlMemberAssign(cobs[0].Members[m].Member, this.ExpandTogether(mexprs));
for(int i = 0, n = exprs.Count; i < n; i++)
{
cobs[i].Members[m].Expression = mexprs[i];
}
}
SqlExpression[] arguments = new SqlExpression[cobs[0].Args.Count];
for(int m = 0, mn = arguments.Length; m < mn; ++m)
{
List<SqlExpression> mexprs = new List<SqlExpression>();
for(int i = 0, n = exprs.Count; i < n; i++)
{
mexprs.Add(cobs[i].Args[m]);
}
arguments[m] = ExpandTogether(mexprs);
}
return factory.New(cobs[0].MetaType, cobs[0].Constructor, arguments, cobs[0].ArgMembers, bindings, exprs[0].SourceExpression);
}
case SqlNodeType.Link:
{
SqlLink[] links = new SqlLink[exprs.Count];
links[0] = (SqlLink)exprs[0];
for(int i = 1, n = exprs.Count; i < n; i++)
{
if(exprs[i] == null || exprs[i].NodeType != SqlNodeType.Link)
throw Error.UnionIncompatibleConstruction();
links[i] = (SqlLink)exprs[i];
if(links[i].KeyExpressions.Count != links[0].KeyExpressions.Count ||
links[i].Member != links[0].Member ||
(links[i].Expansion != null) != (links[0].Expansion != null))
throw Error.UnionIncompatibleConstruction();
}
SqlExpression[] kexprs = new SqlExpression[links[0].KeyExpressions.Count];
List<SqlExpression> lexprs = new List<SqlExpression>();
for(int k = 0, nk = links[0].KeyExpressions.Count; k < nk; k++)
{
lexprs.Clear();
for(int i = 0, n = exprs.Count; i < n; i++)
{
lexprs.Add(links[i].KeyExpressions[k]);
}
kexprs[k] = this.ExpandTogether(lexprs);
for(int i = 0, n = exprs.Count; i < n; i++)
{
links[i].KeyExpressions[k] = lexprs[i];
}
}
SqlExpression expansion = null;
if(links[0].Expansion != null)
{
lexprs.Clear();
for(int i = 0, n = exprs.Count; i < n; i++)
{
lexprs.Add(links[i].Expansion);
}
expansion = this.ExpandTogether(lexprs);
for(int i = 0, n = exprs.Count; i < n; i++)
{
links[i].Expansion = lexprs[i];
}
}
return new SqlLink(links[0].Id, links[0].RowType, links[0].ClrType, links[0].SqlType, links[0].Expression, links[0].Member, kexprs, expansion, links[0].SourceExpression);
}
case SqlNodeType.Value:
{
/*
* ExprSet of all literals of the same value reduce to just a single literal.
*/
SqlValue val0 = (SqlValue)exprs[0];
for(int i = 1; i < exprs.Count; ++i)
{
SqlValue val = (SqlValue)exprs[i];
if(!Equals(val.Value, val0.Value))
return this.ExpandIntoExprSet(exprs);
}
return val0;
}
case SqlNodeType.OptionalValue:
{
if(exprs[0].SqlType.CanBeColumn)
{
goto default;
}
List<SqlExpression> hvals = new List<SqlExpression>(exprs.Count);
List<SqlExpression> vals = new List<SqlExpression>(exprs.Count);
for(int i = 0, n = exprs.Count; i < n; i++)
{
if(exprs[i] == null || exprs[i].NodeType != SqlNodeType.OptionalValue)
{
throw Error.UnionIncompatibleConstruction();
}
SqlOptionalValue sov = (SqlOptionalValue)exprs[i];
hvals.Add(sov.HasValue);
vals.Add(sov.Value);
}
return new SqlOptionalValue(this.ExpandTogether(hvals), this.ExpandTogether(vals));
}
case SqlNodeType.OuterJoinedValue:
{
if(exprs[0].SqlType.CanBeColumn)
{
goto default;
}
List<SqlExpression> values = new List<SqlExpression>(exprs.Count);
for(int i = 0, n = exprs.Count; i < n; i++)
{
if(exprs[i] == null || exprs[i].NodeType != SqlNodeType.OuterJoinedValue)
{
throw Error.UnionIncompatibleConstruction();
}
SqlUnary su = (SqlUnary)exprs[i];
values.Add(su.Operand);
}
return factory.Unary(SqlNodeType.OuterJoinedValue, this.ExpandTogether(values));
}
case SqlNodeType.DiscriminatedType:
{
SqlDiscriminatedType sdt0 = (SqlDiscriminatedType)exprs[0];
List<SqlExpression> foos = new List<SqlExpression>(exprs.Count);
foos.Add(sdt0.Discriminator);
for(int i = 1, n = exprs.Count; i < n; i++)
{
SqlDiscriminatedType sdtN = (SqlDiscriminatedType)exprs[i];
if(sdtN.TargetType != sdt0.TargetType)
{
throw Error.UnionIncompatibleConstruction();
}
foos.Add(sdtN.Discriminator);
}
return factory.DiscriminatedType(this.ExpandTogether(foos), ((SqlDiscriminatedType)exprs[0]).TargetType);
}
case SqlNodeType.ClientQuery:
case SqlNodeType.Multiset:
case SqlNodeType.Element:
case SqlNodeType.Grouping:
throw Error.UnionWithHierarchy();
default:
return this.ExpandIntoExprSet(exprs);
}
}
internal override SqlMemberAssign VisitMemberAssign(SqlMemberAssign ma)
{
throw Error.InvalidFormatNode("MemberAssign");
}
internal override SqlMemberAssign VisitMemberAssign(SqlMemberAssign ma)
{
return new SqlMemberAssign(ma.Member, (SqlExpression)this.Visit(ma.Expression));
}
internal override SqlExpression VisitNew(SqlNew sox)
{
SqlExpression[] args = new SqlExpression[sox.Args.Count];
SqlMemberAssign[] bindings = new SqlMemberAssign[sox.Members.Count];
for(int i = 0, n = args.Length; i < n; i++)
{
args[i] = this.VisitExpression(sox.Args[i]);
}
for(int i = 0, n = bindings.Length; i < n; i++)
{
bindings[i] = this.VisitMemberAssign(sox.Members[i]);
}
return new SqlNew(sox.MetaType, sox.SqlType, sox.Constructor, args, sox.ArgMembers, bindings, sox.SourceExpression);
}
