// Constructors
public IndexProvider(IndexInfo index)
: base(ProviderType.Index)
{
indexHeader = index.GetRecordSetHeader();
Index = new IndexInfoRef(index);
Initialize();
}
public ContainsTableProvider(FullTextIndexInfo index, Func <ParameterContext, string> searchCriteria, string rankColumnName, IList <ColumnInfo> targetColumns, Func <ParameterContext, int> topNByRank, bool fullFeatured)
: base(ProviderType.ContainsTable)
{
SearchCriteria = searchCriteria;
FullFeatured = fullFeatured;
PrimaryIndex = new IndexInfoRef(index.PrimaryIndex);
TargetColumns = new ReadOnlyList <FullTextColumnInfo>(targetColumns.Select(tc => index.Columns.First(c => c.Column == tc)).ToList());
TopN = topNByRank;
if (FullFeatured)
{
var primaryIndexRecordsetHeader =
index.PrimaryIndex.ReflectedType.Indexes.PrimaryIndex.GetRecordSetHeader();
var rankColumn = new MappedColumn(rankColumnName, primaryIndexRecordsetHeader.Length, WellKnownTypes.Double);
indexHeader = primaryIndexRecordsetHeader.Add(rankColumn);
}
else
{
var primaryIndexKeyColumns = index.PrimaryIndex.KeyColumns;
if (primaryIndexKeyColumns.Count != 1)
{
throw new InvalidOperationException(Strings.ExOnlySingleColumnKeySupported);
}
var fieldTypes = primaryIndexKeyColumns
.Select(columnInfo => columnInfo.Key.ValueType)
.Append(WellKnownTypes.Double)
.ToArray(primaryIndexKeyColumns.Count + 1);
var tupleDescriptor = TupleDescriptor.Create(fieldTypes);
var columns = primaryIndexKeyColumns
.Select((c, i) => (Column) new MappedColumn("KEY", i, c.Key.ValueType))
.Append(new MappedColumn("RANK", tupleDescriptor.Count, WellKnownTypes.Double));
indexHeader = new RecordSetHeader(tupleDescriptor, columns);
}
Initialize();
}
public FreeTextProvider(FullTextIndexInfo index, Func <string> searchCriteria, string rankColumnName, Func <int> topN, bool fullFeatured)
: base(ProviderType.FreeText)
{
SearchCriteria = searchCriteria;
FullFeatured = fullFeatured;
TopN = topN;
PrimaryIndex = new IndexInfoRef(index.PrimaryIndex);
if (FullFeatured)
{
var primaryIndexRecordsetHeader = index.PrimaryIndex.ReflectedType.Indexes.PrimaryIndex.GetRecordSetHeader();
var rankColumn = new MappedColumn(rankColumnName, primaryIndexRecordsetHeader.Length, typeof(double));
indexHeader = primaryIndexRecordsetHeader.Add(rankColumn);
}
else
{
var primaryIndexKeyColumns = index.PrimaryIndex.KeyColumns;
if (primaryIndexKeyColumns.Count != 1)
{
throw new InvalidOperationException(Strings.ExOnlySingleColumnKeySupported);
}
var fieldTypes = primaryIndexKeyColumns
.Select(columnInfo => columnInfo.Key.ValueType)
.AddOne(typeof(double))
.ToArray(primaryIndexKeyColumns.Count + 1);
var tupleDescriptor = TupleDescriptor.Create(fieldTypes);
var columns = primaryIndexKeyColumns
.Select((c, i) => (Column) new MappedColumn("KEY", i, c.Key.ValueType))
.AddOne(new MappedColumn("RANK", tupleDescriptor.Count, typeof(double)));
indexHeader = new RecordSetHeader(tupleDescriptor, columns);
}
Initialize();
}
