private XmlSchemaChoice GetSubstitutionChoice(XmlSchemaElement element)
{
if (_substitutionGroupsTable == null)
{
BuildSubstitutionGroups();
}
if (_substitutionGroupsTable != null)
{
SubstitutionGroupWrapper substitutionGroup = (SubstitutionGroupWrapper)_substitutionGroupsTable[element.QualifiedName];
if (substitutionGroup != null)
{ //Element is head of a substitutionGroup
XmlSchemaChoice choice = new XmlSchemaChoice();
foreach (XmlSchemaElement elem in substitutionGroup.Members)
{
choice.Items.Add(elem);
}
XmlSchemaElement headElement = (XmlSchemaElement)_schemaSet.GlobalElements[element.QualifiedName];
if (headElement.IsAbstract)
{ //Should not generate the abstract element
choice.Items.Remove(headElement);
}
choice.MinOccurs = element.MinOccurs;
choice.MaxOccurs = element.MaxOccurs;
return(choice);
}
}
return(null);
}
private void BuildSubstitutionGroups()
{
foreach (XmlSchemaElement element in _schemaSet.GlobalElements.Values)
{
XmlQualifiedName head = element.SubstitutionGroup;
if (!head.IsEmpty)
{
if (_substitutionGroupsTable == null)
{
_substitutionGroupsTable = new Hashtable();
}
SubstitutionGroupWrapper substitutionGroup = (SubstitutionGroupWrapper)_substitutionGroupsTable[head];
if (substitutionGroup == null)
{
substitutionGroup = new SubstitutionGroupWrapper();
substitutionGroup.Head = head;
_substitutionGroupsTable.Add(head, substitutionGroup);
}
ArrayList members = substitutionGroup.Members;
if (!members.Contains(element))
{ //Members might contain element if the same schema is included and imported through different paths. Imp, hence will be added to set directly
members.Add(element);
}
}
}
if (_substitutionGroupsTable != null)
{ //There were subst grps in the schema
foreach (SubstitutionGroupWrapper substGroup in _substitutionGroupsTable.Values)
{
ResolveSubstitutionGroup(substGroup);
}
}
}
private void ResolveSubstitutionGroup(SubstitutionGroupWrapper substitutionGroup)
{
ArrayList newMembers = null;
XmlSchemaElement headElement = (XmlSchemaElement)_schemaSet.GlobalElements[substitutionGroup.Head];
if (substitutionGroup.Members.Contains(headElement))
{ // already checked
return;
}
foreach (XmlSchemaElement element in substitutionGroup.Members)
{
//Chain to other head's that are members of this head's substGroup
SubstitutionGroupWrapper g = (SubstitutionGroupWrapper)_substitutionGroupsTable[element.QualifiedName];
if (g != null)
{
ResolveSubstitutionGroup(g);
foreach (XmlSchemaElement element1 in g.Members)
{
if (element1 != element)
{ //Exclude the head
if (newMembers == null)
{
newMembers = new ArrayList();
}
newMembers.Add(element1);
}
}
}
}
if (newMembers != null)
{
foreach (XmlSchemaElement newMember in newMembers)
{
substitutionGroup.Members.Add(newMember);
}
}
substitutionGroup.Members.Add(headElement);
}