// --------------------------------------------------------------------------------------------------
// Index
// --------------------------------------------------------------------------------------------------
// Virtual Index List wants an linkNode
private void indexListView_RetrieveVirtualItem(object sender, RetrieveVirtualItemEventArgs e)
{
int i = e.ItemIndex;
ListViewItem li = new ListViewItem((i + 1).ToString());
if (_helpKeywords == null || i >= _helpKeywords.Count) //range check
{
li.SubItems.AddRange(new string[] { "?", "?" });
e.Item = li;
return;
}
//Note: We can improve speed and smoothness with some local caching
int topicCount;
Keyword keyword = indexCache.GetKW(i, out topicCount);
if (keyword == null)
{
_helpKeywords.MoveTo(i);
keyword = (Keyword)_helpKeywords.Current;
topicCount = keyword.Topics.Count;
indexCache.Add(i, keyword, topicCount);
}
String kwText = keyword.DisplayValue;
if (keyword.IsSubkey)
{
kwText = " " + kwText;
}
li.SubItems.AddRange(new string[] { kwText, topicCount.ToString() });
e.Item = li;
}
public bool EnsureIndex(IndexDefinition indexDefinition)
{
// Try to not rebuild index, so we check if there exists an equal defintion already
IndexWrapper existing;
if (IndexCache.TryGetValue(indexDefinition.Path, out existing))
{
if (indexDefinition.Options.Equals(existing.IndexDefinition.Options))
{
// phew, existing index was already matching. bail out
return(false);
}
DropIndex(indexDefinition.Path);
}
// An index can not both exclude certain values and at the same time include certain values
var hasIncludeValues = (indexDefinition.Options.IncludeValues != null) &&
(indexDefinition.Options.IncludeValues.Length > 0);
var hasExcludeValues = (indexDefinition.Options.ExcludeValues != null) &&
(indexDefinition.Options.ExcludeValues.Length > 0);
if (hasIncludeValues && hasExcludeValues)
{
throw new KiwiDbException("An index can not have an exclusion list and an inclusion list at the same time.");
}
var index = new IndexWrapper(this, indexDefinition)
{
IsChanged = true
};
IndexCache.Add(indexDefinition.Path, index);
Insert(indexDefinition.Path, JSON.FromObject(indexDefinition));
// rebuild index
foreach (var record in MasterTable.Scan())
{
UpdateIndex(record.Key, null, record.Value);
}
return(true);
}