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//------------------------------------------------------------------------------
// <copyright file="SectionUpdates.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Configuration {
using System.Collections;
//
// A collection of updates to the sections that have the same location attributes.
//
internal class SectionUpdates {
private string _name; // name of this section, for debugging
private Hashtable _groups; // group name -> SectionUpdates
private Hashtable _sections; // section name -> Update
private int _cUnretrieved; // number of items not retrieved in update algorithm.
private int _cMoved; // number of items moved (new or location attributes changed).
private Update _sectionGroupUpdate; // update for this group
private bool _isNew; // is the entire section new (all sections and subgroups)?
internal SectionUpdates(string name) {
_name = name;
_groups = new Hashtable();
_sections = new Hashtable();
}
internal bool IsNew {
get {return _isNew;}
set {_isNew = value;}
}
internal bool IsEmpty {
get {
return _groups.Count == 0 && _sections.Count == 0;
}
}
//
// Find the SectionUpdates for a configKey, and create it if it does not exist.
//
private SectionUpdates FindSectionUpdates(string configKey, bool isGroup) {
string group, dummy;
if (isGroup) {
group = configKey;
}
else {
BaseConfigurationRecord.SplitConfigKey(configKey, out group, out dummy);
}
Debug.Assert(String.IsNullOrEmpty(_name), "FindSectionUpdates assumes search is from root record");
SectionUpdates sectionUpdates = this;
if (group.Length != 0) {
// find the SectionUpdates for the group
string [] groups = group.Split(BaseConfigurationRecord.ConfigPathSeparatorParams);
foreach (string groupPart in groups) {
SectionUpdates sectionUpdatesChild = (SectionUpdates) sectionUpdates._groups[groupPart];
if (sectionUpdatesChild == null) {
sectionUpdatesChild = new SectionUpdates(groupPart);
sectionUpdates._groups[groupPart] = sectionUpdatesChild;
}
sectionUpdates = sectionUpdatesChild;
}
}
return sectionUpdates;
}
//
// Recursively check whether this group has all new updates.
// An update is new if all sections are new and all subgroups are new.
//
internal void CompleteUpdates() {
bool allSubgroupsAreNew = true;
// call CompleteUpdates() for all children
foreach (SectionUpdates sectionUpdates in _groups.Values) {
sectionUpdates.CompleteUpdates();
if (!sectionUpdates.IsNew) {
allSubgroupsAreNew = false;
}
}
_isNew = allSubgroupsAreNew && _cMoved == _sections.Count;
}
//
// Add one update.
//
internal void AddSection(Update update) {
SectionUpdates sectionUpdates = FindSectionUpdates(update.ConfigKey, false);
sectionUpdates._sections.Add(update.ConfigKey, update);
// Maintain counts.
sectionUpdates._cUnretrieved++;
if (update.Moved) {
sectionUpdates._cMoved++;
}
}
//
// Add a section group update.
//
internal void AddSectionGroup(Update update) {
SectionUpdates sectionUpdates = FindSectionUpdates(update.ConfigKey, true);
sectionUpdates._sectionGroupUpdate = update;
}
//
// Retrieve an update if it has not yet been retrieved.
//
private Update GetUpdate(string configKey) {
Update update = (Update) _sections[configKey];
if (update != null) {
if (update.Retrieved) {
update = null;
}
else {
update.Retrieved = true;
_cUnretrieved--;
if (update.Moved) {
_cMoved--;
}
}
}
return update;
}
//
// Get the update for a section group.
//
internal DeclarationUpdate GetSectionGroupUpdate() {
if (_sectionGroupUpdate != null && !_sectionGroupUpdate.Retrieved) {
_sectionGroupUpdate.Retrieved = true;
return (DeclarationUpdate) _sectionGroupUpdate;
}
return null;
}
internal DefinitionUpdate GetDefinitionUpdate(string configKey) {
return (DefinitionUpdate) GetUpdate(configKey);
}
internal DeclarationUpdate GetDeclarationUpdate(string configKey) {
return (DeclarationUpdate) GetUpdate(configKey);
}
internal SectionUpdates GetSectionUpdatesForGroup(string group) {
return (SectionUpdates) _groups[group];
}
//
// Return true if this section group or any of its children have unretrieved sections.
//
internal bool HasUnretrievedSections() {
if (_cUnretrieved > 0 || (_sectionGroupUpdate != null && !_sectionGroupUpdate.Retrieved)) {
return true;
}
foreach (SectionUpdates sectionUpdates in _groups.Values) {
if (sectionUpdates.HasUnretrievedSections()) {
return true;
}
}
return false;
}
internal void MarkAsRetrieved()
{
_cUnretrieved = 0;
foreach (SectionUpdates sectionUpdates in _groups.Values) {
sectionUpdates.MarkAsRetrieved();
}
if (_sectionGroupUpdate != null){
_sectionGroupUpdate.Retrieved = true;
}
}
internal void MarkGroupAsRetrieved(string groupName)
{
SectionUpdates sectionUpdates = _groups[groupName] as SectionUpdates;
if (sectionUpdates != null) {
sectionUpdates.MarkAsRetrieved();
}
}
//
// Return true if this section group contains any new section groups, false otherwise.
//
internal bool HasNewSectionGroups()
{
foreach (SectionUpdates sectionUpdates in _groups.Values) {
if (sectionUpdates.IsNew)
return true;
}
return false;
}
//
// Return a sorted list of the names of unretrieved sections in this group.
//
internal string[] GetUnretrievedSectionNames() {
if (_cUnretrieved == 0)
return null;
string[] sectionNames = new string[_cUnretrieved];
int i = 0;
foreach (Update update in _sections.Values) {
if (!update.Retrieved) {
sectionNames[i] = update.ConfigKey;
i++;
}
}
Array.Sort(sectionNames);
return sectionNames;
}
//
// Return a sorted list of the names of moved and unretrieved sections in this group.
//
internal string[] GetMovedSectionNames() {
if (_cMoved == 0)
return null;
string[] sectionNames = new string[_cMoved];
int i = 0;
foreach (Update update in _sections.Values) {
if (update.Moved && !update.Retrieved) {
sectionNames[i] = update.ConfigKey;
i++;
}
}
Array.Sort(sectionNames);
return sectionNames;
}
//
// Return a sorted list of the names of groups with unretrieved sections.
//
internal string[] GetUnretrievedGroupNames() {
ArrayList unretrievedGroups = new ArrayList();
foreach (DictionaryEntry de in _groups) {
string group = (string) de.Key;
SectionUpdates sectionUpdates = (SectionUpdates) de.Value;
if (sectionUpdates.HasUnretrievedSections()) {
unretrievedGroups.Add(group);
}
}
if (unretrievedGroups.Count == 0)
return null;
string[] groupNames = new string[unretrievedGroups.Count];
unretrievedGroups.CopyTo(groupNames);
Array.Sort(groupNames);
return groupNames;
}
//
// Return a sorted list of the names of new section groups with unretrieved sections.
//
internal string[] GetNewGroupNames() {
ArrayList newsGroups = new ArrayList();
foreach (DictionaryEntry de in _groups) {
string group = (string) de.Key;
SectionUpdates sectionUpdates = (SectionUpdates) de.Value;
if (sectionUpdates.IsNew && sectionUpdates.HasUnretrievedSections()) {
newsGroups.Add(group);
}
}
if (newsGroups.Count == 0)
return null;
string[] groupNames = new string[newsGroups.Count];
newsGroups.CopyTo(groupNames);
Array.Sort(groupNames);
return groupNames;
}
}
}
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