private SqlNew BuildProjectionInternal(SqlExpression item, MetaType rowType, IEnumerable <MetaDataMember> members, bool allowDeferred, SqlLink link, Expression source) { var list = new List <SqlMemberAssign>(); foreach (var member in members) { if (allowDeferred && (member.IsAssociation || member.IsDeferred)) { if (link != null && member != link.Member && member.IsAssociation && member.MappedName == link.Member.MappedName && !member.Association.IsMany && !IsPreloaded(link.Member.Member)) { var sqlLink = BuildLink(item, member, source); sqlLink.Expansion = link.Expression; list.Add(new SqlMemberAssign(member.Member, sqlLink)); } else { list.Add(new SqlMemberAssign(member.Member, BuildLink(item, member, source))); } } else if (!member.IsAssociation) { list.Add(new SqlMemberAssign(member.Member, sql.Member(item, member))); } } var constructor = rowType.Type.GetConstructor(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null, Type.EmptyTypes, null); if (constructor == null) { throw Error.MappedTypeMustHaveDefaultConstructor(rowType.Type); } return(sql.New(rowType, constructor, null, null, list, source)); }
private SqlNew BuildProjectionInternal(SqlExpression item, MetaType rowType, IEnumerable <MetaDataMember> members, bool allowDeferred, SqlLink link, Expression source) { List <SqlMemberAssign> bindings = new List <SqlMemberAssign>(); foreach (MetaDataMember mm in members) { if (allowDeferred && (mm.IsAssociation || mm.IsDeferred)) { // check if this member is the reverse association to the supplied link if (link != null && mm != link.Member && mm.IsAssociation && mm.MappedName == link.Member.MappedName && !mm.Association.IsMany && !IsPreloaded(link.Member.Member)) { // place a new link here with an expansion that is previous link's root expression. // this will allow joins caused by reverse association references to 'melt' away. :-) SqlLink mlink = this.BuildLink(item, mm, source); mlink.Expansion = link.Expression; bindings.Add(new SqlMemberAssign(mm.Member, mlink)); } else { bindings.Add(new SqlMemberAssign(mm.Member, this.BuildLink(item, mm, source))); } } else if (!mm.IsAssociation) { bindings.Add(new SqlMemberAssign(mm.Member, sql.Member(item, mm))); } } ConstructorInfo cons = rowType.Type.GetConstructor(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null, System.Type.EmptyTypes, null); if (cons == null) { throw Error.MappedTypeMustHaveDefaultConstructor(rowType.Type); } return(sql.New(rowType, cons, null, null, bindings, source)); }
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 (!object.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)); } }