internal override bool ExecuteFullScan(BsonDocument doc, IndexOptions options)
{
var val = doc.Get(this.Field).Normalize(options);
return(val.CompareTo(_value) == 0);
}
/// <summary>
/// Create a new permanent index in all documents inside this collections if index not exists already. Returns true if index was created or false if already exits
/// </summary>
/// <param name="field">Document field name (case sensitive)</param>
/// <param name="options">All index options</param>
public virtual bool EnsureIndex(string field, IndexOptions options)
{
if (string.IsNullOrEmpty(field))
{
throw new ArgumentNullException("field");
}
if (options == null)
{
throw new ArgumentNullException("options");
}
if (field == "_id")
{
return(false); // always exists
}
if (!CollectionIndex.IndexPattern.IsMatch(field))
{
throw LiteException.InvalidFormat("IndexField", field);
}
// do not create collection at this point
var col = this.GetCollectionPage(false);
if (col != null)
{
// check if index already exists but has diferent options
var existsIndex = col.GetIndex(field);
if (existsIndex != null)
{
if (!options.Equals(existsIndex.Options))
{
// drop index and create another
this.DropIndex(field);
}
else
{
return(false);
}
}
}
;
// start transaction
this.Database.Transaction.Begin();
try
{
// if not collection yet, create a new now
if (col == null)
{
col = this.Database.Collections.Add(this.Name);
_pageID = col.PageID;
}
// create index head
var index = this.Database.Indexer.CreateIndex(col);
index.Field = field;
index.Options = options;
// read all objects (read from PK index)
foreach (var node in new QueryAll("_id", 1).Run(this))
{
var dataBlock = this.Database.Data.Read(node.DataBlock, true);
// read object
var doc = BsonSerializer.Deserialize(dataBlock.Buffer).AsDocument;
// adding index
var key = doc.Get(field);
var newNode = this.Database.Indexer.AddNode(index, key);
// adding this new index Node to indexRef
dataBlock.IndexRef[index.Slot] = newNode.Position;
// link index node to datablock
newNode.DataBlock = dataBlock.Position;
// mark datablock page as dirty
dataBlock.Page.IsDirty = true;
}
this.Database.Transaction.Commit();
}
catch
{
this.Database.Transaction.Rollback();
throw;
}
return(true);
}
internal override void NormalizeValues(IndexOptions options)
{
_value = _value.Normalize(options);
}
/// <summary>
/// Create a new permanent index in all documents inside this collections if index not exists already.
/// </summary>
/// <param name="property">Property linq expression</param>
/// <param name="options">Use all indexes options</param>
public virtual bool EnsureIndex <K>(Expression <Func <T, K> > property, IndexOptions options)
{
var field = _visitor.GetBsonField(property);
return(this.EnsureIndex(field, options));
}