internal SqlExpression BuildProjection(SqlExpression item, MetaType rowType, bool allowDeferred, SqlLink link, Expression source)
{
if (!rowType.HasInheritance)
{
return(BuildProjectionInternal(item, rowType, (rowType.Table != null) ? rowType.PersistentDataMembers : rowType.DataMembers, allowDeferred, link, source));
}
var list = new List <MetaType>(rowType.InheritanceTypes);
var list2 = new List <SqlTypeCaseWhen>();
SqlTypeCaseWhen sqlTypeCaseWhen = null;
var inheritanceRoot = rowType.InheritanceRoot;
var discriminator = inheritanceRoot.Discriminator;
var type = discriminator.Type;
var sqlMember = sql.Member(item, discriminator.Member);
foreach (var item2 in list)
{
if (item2.HasInheritanceCode)
{
var typeBinding = BuildProjectionInternal(item, item2, item2.PersistentDataMembers, allowDeferred, link, source);
if (item2.IsInheritanceDefault)
{
sqlTypeCaseWhen = new SqlTypeCaseWhen(null, typeBinding);
}
object value = InheritanceRules.InheritanceCodeForClientCompare(item2.InheritanceCode, sqlMember.SqlType);
var match = sql.Value(type, sql.Default(discriminator), value, true, source);
list2.Add(new SqlTypeCaseWhen(match, typeBinding));
}
}
if (sqlTypeCaseWhen == null)
{
throw Error.EmptyCaseNotSupported();
}
list2.Add(sqlTypeCaseWhen);
return(sql.TypeCase(inheritanceRoot.Type, inheritanceRoot, sqlMember, list2.ToArray(), source));
}
private static int BuildFieldDeclarations(MetaType type, Dictionary <object, string> memberNameToMappedName, StringBuilder sb)
{
int n = 0;
foreach (MetaDataMember mm in type.DataMembers)
{
// Only generate declarations for the current type.
if (mm.IsDeclaredBy(type))
{
if (!mm.IsAssociation)
{
if (mm.IsPersistent)
{
object dn = InheritanceRules.DistinguishedMemberName(mm.Member);
string mappedName;
if (memberNameToMappedName.TryGetValue(dn, out mappedName))
{
if (mappedName == mm.MappedName)
{
continue;
}
}
else
{
memberNameToMappedName.Add(dn, mm.MappedName);
}
if (sb.Length > 0)
{
sb.Append(", ");
}
sb.AppendLine();
sb.Append(string.Format(Globalization.CultureInfo.InvariantCulture, " {0} ", SqlIdentifier.QuoteCompoundIdentifier(mm.MappedName)));
if (!string.IsNullOrEmpty(mm.Expression))
{
// Generate "AS <expression>" for computed columns
sb.Append("AS " + mm.Expression);
}
else
{
sb.Append(GetDbType(mm));
}
n++;
}
}
}
}
return(n);
}
internal SqlExpression BuildProjection(SqlExpression item, MetaType rowType, bool allowDeferred, SqlLink link, Expression source)
{
if (!rowType.HasInheritance)
{
return(this.BuildProjectionInternal(item, rowType, (rowType.Table != null) ? rowType.PersistentDataMembers : rowType.DataMembers, allowDeferred, link, source));
}
else
{
// Build a type case that represents a switch between the various type.
List <MetaType> mappedTypes = new List <MetaType>(rowType.InheritanceTypes);
List <SqlTypeCaseWhen> whens = new List <SqlTypeCaseWhen>();
SqlTypeCaseWhen @else = null;
MetaType root = rowType.InheritanceRoot;
MetaDataMember discriminator = root.Discriminator;
Type dt = discriminator.Type;
SqlMember dm = sql.Member(item, discriminator.Member);
foreach (MetaType type in mappedTypes)
{
if (type.HasInheritanceCode)
{
SqlNew defaultProjection = this.BuildProjectionInternal(item, type, type.PersistentDataMembers, allowDeferred, link, source);
if (type.IsInheritanceDefault)
{
@else = new SqlTypeCaseWhen(null, defaultProjection);
}
// Add an explicit case even for the default.
// Redundant results will be optimized out later.
object code = InheritanceRules.InheritanceCodeForClientCompare(type.InheritanceCode, dm.SqlType);
SqlExpression match = sql.Value(dt, sql.Default(discriminator), code, true, source);
whens.Add(new SqlTypeCaseWhen(match, defaultProjection));
}
}
if (@else == null)
{
throw Error.EmptyCaseNotSupported();
}
whens.Add(@else); // Add the else at the end.
return(sql.TypeCase(root.Type, root, dm, whens.ToArray(), source));
}
}
