private void LoadClassList(Cursor dataTableCursor)
{
// Initialize the class list
this.classesByName = new Dictionary <string, int>();
// Load column IDs. We are in an early stage of schema loading, which means that we cannot search for non-system attributes by name.
Columnid dntCol = this.FindColumnId(CommonDirectoryAttributes.DNTag);
Columnid governsIdCol = this.attributesByInternalId[CommonDirectoryAttributes.GovernsIdId].ColumnID;
SchemaAttribute ldapDisplayNameAtt = this.attributesByInternalId[CommonDirectoryAttributes.LdapDisplayNameId];
// Search for all classes using this heuristics: (&(ldapDisplayName=*)(governsId=*))
dataTableCursor.CurrentIndex = ldapDisplayNameAtt.Index;
while (dataTableCursor.MoveNext())
{
int?governsId = dataTableCursor.RetrieveColumnAsInt(governsIdCol);
if (!governsId.HasValue)
{
// This is an attribute and not a class, so we skip to the next object.
continue;
}
// TODO: Load more data about classes
int classDNT = dataTableCursor.RetrieveColumnAsDNTag(dntCol).Value;
string className = dataTableCursor.RetrieveColumnAsString(ldapDisplayNameAtt.ColumnID);
classesByName.Add(className, classDNT);
}
}
private void LoadColumnList(ColumnCollection columns)
{
this.attributesByName = new Dictionary <string, SchemaAttribute>(columns.Count);
this.attributesByInternalId = new Dictionary <int, SchemaAttribute>(columns.Count);
foreach (var column in columns)
{
var attr = new SchemaAttribute();
attr.ColumnName = column.Name;
attr.ColumnID = column.Columnid;
if (IsAttributeColumn(attr.ColumnName))
{
// Column is mapped to LDAP attribute
attr.InternalId = GetInternalIdFromColumnName(attr.ColumnName);
attributesByInternalId.Add(attr.InternalId.Value, attr);
}
else
{
// System column. These normally do not appear in schema.
attr.IsSystemOnly = true;
attr.SystemFlags = AttributeSystemFlags.NotReplicated | AttributeSystemFlags.Base | AttributeSystemFlags.DisallowRename | AttributeSystemFlags.Operational;
// Approximate Syntax from ColumnId
attr.Syntax = GetSyntaxFromColumnType(column.Columnid);
attr.OmSyntax = AttributeOmSyntax.Undefined;
attr.Name = NormalizeSystemColumnName(attr.ColumnName);
this.attributesByName.Add(attr.Name.ToLower(), attr);
}
}
}
private void LoadAttributeIndices(IEnumerable <IndexInfo> indices)
{
//HACK: We are using low-level IndexInfo instead of high-level IndexCollection.
/* There is a bug in Isam IndexCollection enumerator, which causes it to loop indefinitely
* through the first few indices under some very rare circumstances. */
foreach (var index in indices)
{
var segments = index.IndexSegments;
if (segments.Count == 1)
{
// We support only simple indexes
SchemaAttribute attr = FindAttributeByIndexName(index.Name);
if (attr != null)
{
// We found a single attribute to which this index corresponds
attr.Index = index.Name;
}
}
}
// Manually assign PDNT_index to PDNT_col
var pdnt = FindAttribute(CommonDirectoryAttributes.ParentDNTag);
pdnt.Index = ParentDNTagIndex;
}
public IEnumerable <int> GetLinkedDNTags(int dnTag, string attributeName)
{
SchemaAttribute attr = this.schema.FindAttribute(attributeName);
if (!attr.LinkId.HasValue)
{
//TODO: Throw a proper exception
// TODO: Check that attribute type is DN
throw new Exception("This is not a linked multivalue attribute.");
}
int linkId = attr.LinkId.Value;
// Remove the rightmost bit that indicates if this is a forward link or a backlink.
int linkBase = linkId >> 1;
// Columns order in index: link_DNT, link_base, backlink_DNT
Key key = Key.Compose(dnTag, linkBase);
key.AddWildcard();
cursor.FindRecords(MatchCriteria.EqualTo, key);
while (cursor.MoveNext())
{
// TODO: Not deactivated?
int foundTag = (int)cursor.IndexRecord[backlinkDNCol];
yield return(foundTag);
}
}
private SchemaAttribute FindAttributeByIndexName(string indexName)
{
SchemaAttribute attribute = null;
if (IsAttributeColumnIndex(indexName))
{
int internalId = GetInternalIdFromIndexName(indexName);
this.attributesByInternalId.TryGetValue(internalId, out attribute);
}
else
{
string systemColName = NormalizeIndexName(indexName);
this.attributesByName.TryGetValue(systemColName.ToLower(), out attribute);
}
return(attribute);
}
private void FindLinkedRecords(int dnTag, string attributeName)
{
SchemaAttribute attr = this.schema.FindAttribute(attributeName);
if (!attr.LinkId.HasValue)
{
//TODO: Throw a proper exception
throw new Exception("This is not a linked multivalue attribute.");
}
int linkBase = attr.LinkBase.Value;
// Columns order in index: link_DNT, link_base, backlink_DNT
Key key = Key.Compose(dnTag, linkBase);
key.AddWildcard();
this.cursor.FindRecords(MatchCriteria.EqualTo, key);
}
private void LoadAttributeProperties(Cursor dataTableCursor)
{
// With these built-in attributes, ID == Internal ID
Columnid attributeIdCol = this.attributesByInternalId[CommonDirectoryAttributes.AttributeIdId].ColumnID;
SchemaAttribute ldapDisplayNameAtt = this.attributesByInternalId[CommonDirectoryAttributes.LdapDisplayNameId];
Columnid ldapDisplayNameCol = ldapDisplayNameAtt.ColumnID;
// Set index to ldapDisplayName so that we can find attributes by their name
dataTableCursor.CurrentIndex = ldapDisplayNameAtt.Index;
// Load attribute ids of attributeSchema attributes by doing DB lookups
// TODO: Hardcode IDs of these attributes so that we do not have to do DB lookups?
Columnid internalIdCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.InternalId);
Columnid linkIdCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.LinkId);
Columnid isSingleValuedCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.IsSingleValued);
Columnid attributeSyntaxCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.AttributeSyntax);
Columnid isInGlobalCatalogCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.IsInGlobalCatalog);
Columnid searchFlagsCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.SearchFlags);
Columnid systemOnlyCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.SystemOnly);
Columnid syntaxCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.AttributeSyntax);
Columnid omSyntaxCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.AttributeOmSyntax);
Columnid cnCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.CommonName);
Columnid rangeLowerCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.RangeLower);
Columnid rangeUpperCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.RangeUpper);
Columnid schemaGuidCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.SchemaGuid);
Columnid systemFlagsCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.SystemFlags);
Columnid isDefunctCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.IsDefunct);
// Now traverse through all schema attributes and load their properties
dataTableCursor.CurrentIndex = this.attributesByInternalId[CommonDirectoryAttributes.ObjectClassId].Index;
dataTableCursor.FindRecords(MatchCriteria.EqualTo, Key.Compose(CommonDirectoryClasses.AttributeSchemaId));
while (dataTableCursor.MoveNext())
{
int? internalId = dataTableCursor.RetrieveColumnAsInt(internalIdCol);
int attributeId = dataTableCursor.RetrieveColumnAsInt(attributeIdCol).Value;
// Some built-in attributes do not have internal id set, which meand it is equal to the public id
int id = internalId ?? attributeId;
SchemaAttribute attribute;
bool found = this.attributesByInternalId.TryGetValue(id, out attribute);
if (! found)
{
// Load info about a new attribute
attribute = new SchemaAttribute();
attribute.InternalId = internalId;
}
attribute.Id = dataTableCursor.RetrieveColumnAsInt(attributeIdCol).Value;
attribute.Name = dataTableCursor.RetrieveColumnAsString(ldapDisplayNameCol);
attribute.CommonName = dataTableCursor.RetrieveColumnAsString(cnCol);
attribute.RangeLower = dataTableCursor.RetrieveColumnAsInt(rangeLowerCol);
attribute.RangeUpper = dataTableCursor.RetrieveColumnAsInt(rangeUpperCol);
attribute.SchemaGuid = dataTableCursor.RetrieveColumnAsGuid(schemaGuidCol).Value;
attribute.IsDefunct = dataTableCursor.RetrieveColumnAsBoolean(isDefunctCol);
attribute.SystemFlags = dataTableCursor.RetrieveColumnAsAttributeSystemFlags(systemFlagsCol);
attribute.LinkId = dataTableCursor.RetrieveColumnAsInt(linkIdCol);
attribute.IsInGlobalCatalog = dataTableCursor.RetrieveColumnAsBoolean(isInGlobalCatalogCol);
attribute.IsSingleValued = dataTableCursor.RetrieveColumnAsBoolean(isSingleValuedCol);
attribute.SearchFlags = dataTableCursor.RetrieveColumnAsSearchFlags(searchFlagsCol);
attribute.IsSystemOnly = dataTableCursor.RetrieveColumnAsBoolean(systemOnlyCol);
attribute.Syntax = dataTableCursor.RetrieveColumnAsAttributeSyntax(syntaxCol);
attribute.OmSyntax = dataTableCursor.RetrieveColumnAsAttributeOmSyntax(omSyntaxCol);
// Make it case-insensitive by always lowering the name:
this.attributesByName.Add(attribute.Name.ToLower(), attribute);
}
}
private void LoadColumnList(ColumnCollection columns)
{
this.attributesByName = new Dictionary<string, SchemaAttribute>(columns.Count);
this.attributesByInternalId = new Dictionary<int, SchemaAttribute>(columns.Count);
foreach (var column in columns)
{
var attr = new SchemaAttribute();
attr.ColumnName = column.Name;
attr.ColumnID = column.Columnid;
if (IsAttributeColumn(attr.ColumnName))
{
// Column is mapped to LDAP attribute
attr.InternalId = GetInternalIdFromColumnName(attr.ColumnName);
attributesByInternalId.Add(attr.InternalId.Value, attr);
}
else
{
// System column. These normally do not appear in schema.
attr.IsSystemOnly = true;
attr.SystemFlags = AttributeSystemFlags.NotReplicated | AttributeSystemFlags.Base | AttributeSystemFlags.DisallowRename | AttributeSystemFlags.Operational;
// Approximate Syntax from ColumnId
attr.Syntax = GetSyntaxFromColumnType(column.Columnid);
attr.OmSyntax = AttributeOmSyntax.Undefined;
attr.Name = NormalizeSystemColumnName(attr.ColumnName);
this.attributesByName.Add(attr.Name.ToLower(), attr);
}
}
}
private void LoadAttributeProperties(Cursor dataTableCursor)
{
// With these built-in attributes, ID == Internal ID
Columnid attributeIdCol = this.attributesByInternalId[CommonDirectoryAttributes.AttributeIdId].ColumnID;
SchemaAttribute ldapDisplayNameAtt = this.attributesByInternalId[CommonDirectoryAttributes.LdapDisplayNameId];
Columnid ldapDisplayNameCol = ldapDisplayNameAtt.ColumnID;
// Set index to ldapDisplayName so that we can find attributes by their name
dataTableCursor.CurrentIndex = ldapDisplayNameAtt.Index;
// Load attribute ids of attributeSchema attributes by doing DB lookups
// TODO: Hardcode IDs of these attributes so that we do not have to do DB lookups?
Columnid internalIdCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.InternalId);
Columnid linkIdCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.LinkId);
Columnid isSingleValuedCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.IsSingleValued);
Columnid attributeSyntaxCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.AttributeSyntax);
Columnid isInGlobalCatalogCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.IsInGlobalCatalog);
Columnid searchFlagsCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.SearchFlags);
Columnid systemOnlyCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.SystemOnly);
Columnid syntaxCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.AttributeSyntax);
Columnid omSyntaxCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.AttributeOmSyntax);
Columnid cnCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.CommonName);
Columnid rangeLowerCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.RangeLower);
Columnid rangeUpperCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.RangeUpper);
Columnid schemaGuidCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.SchemaGuid);
Columnid systemFlagsCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.SystemFlags);
Columnid isDefunctCol = this.LoadColumnIdByAttributeName(dataTableCursor, CommonDirectoryAttributes.IsDefunct);
// Now traverse through all schema attributes and load their properties
// Use this filter: (objectCategory=attributeSchema)
dataTableCursor.CurrentIndex = this.attributesByInternalId[CommonDirectoryAttributes.ObjectCategoryId].Index;
dataTableCursor.FindRecords(MatchCriteria.EqualTo, Key.Compose(this.FindClassId(CommonDirectoryClasses.AttributeSchema)));
while (dataTableCursor.MoveNext())
{
int?internalId = dataTableCursor.RetrieveColumnAsInt(internalIdCol);
int attributeId = dataTableCursor.RetrieveColumnAsInt(attributeIdCol).Value;
// Some built-in attributes do not have internal id set, which means it is equal to the public id
int id = internalId ?? attributeId;
SchemaAttribute attribute;
bool found = this.attributesByInternalId.TryGetValue(id, out attribute);
if (!found)
{
// We are loading info about a new attribute
attribute = new SchemaAttribute();
attribute.InternalId = internalId;
}
attribute.Id = dataTableCursor.RetrieveColumnAsInt(attributeIdCol).Value;
attribute.Name = dataTableCursor.RetrieveColumnAsString(ldapDisplayNameCol);
attribute.CommonName = dataTableCursor.RetrieveColumnAsString(cnCol);
attribute.RangeLower = dataTableCursor.RetrieveColumnAsInt(rangeLowerCol);
attribute.RangeUpper = dataTableCursor.RetrieveColumnAsInt(rangeUpperCol);
attribute.SchemaGuid = dataTableCursor.RetrieveColumnAsGuid(schemaGuidCol).Value;
attribute.IsDefunct = dataTableCursor.RetrieveColumnAsBoolean(isDefunctCol);
attribute.SystemFlags = dataTableCursor.RetrieveColumnAsAttributeSystemFlags(systemFlagsCol);
attribute.LinkId = dataTableCursor.RetrieveColumnAsInt(linkIdCol);
attribute.IsInGlobalCatalog = dataTableCursor.RetrieveColumnAsBoolean(isInGlobalCatalogCol);
attribute.IsSingleValued = dataTableCursor.RetrieveColumnAsBoolean(isSingleValuedCol);
attribute.SearchFlags = dataTableCursor.RetrieveColumnAsSearchFlags(searchFlagsCol);
attribute.IsSystemOnly = dataTableCursor.RetrieveColumnAsBoolean(systemOnlyCol);
attribute.Syntax = dataTableCursor.RetrieveColumnAsAttributeSyntax(syntaxCol);
attribute.OmSyntax = dataTableCursor.RetrieveColumnAsAttributeOmSyntax(omSyntaxCol);
// Make it case-insensitive by always lowering the name:
this.attributesByName.Add(attribute.Name.ToLower(), attribute);
}
}
