C# Class Azavea.Open.DAO.Memory.MultiPropertyMemoryIndex

This is an index that has a nested index (I.E. an index on two or more fields).
Inheritance: AbstractMemoryIndex
Mostrar archivo Open project: azavea/net-dao

Public Methods

Method Description
GetCardinality ( DaoCriteria crit ) : int

Returns a number indicating how many breaks this index has for the properties used in the criteria. Roughly speaking, higher is better (though the number is an estimate, it is possible to have data that makes the index inefficient). If there are multiple indexes, the one that returns the highest number from this method will be used. An index should return 1 to indicate that it offers no value for this criteria.
GetPossibleMatches ( DaoCriteria crit ) : IList

Uses the index to return the smallest number of possible matches for this criteria.
MultiPropertyMemoryIndex ( MemoryDaLayer layer, string property, List nextProperties, IEnumerable objects ) : System

This is an index that has a nested index (I.E. an index on two or more fields).
Rebuild ( IEnumerable objects ) : void

This method rebuilds the index given a new list of data objects.

Private Methods

Method Description
AddObjectsToSubIndexes ( IEnumerable objects ) : void

Method Details

GetCardinality() public method

Returns a number indicating how many breaks this index has for the properties used in the criteria. Roughly speaking, higher is better (though the number is an estimate, it is possible to have data that makes the index inefficient). If there are multiple indexes, the one that returns the highest number from this method will be used. An index should return 1 to indicate that it offers no value for this criteria.
public GetCardinality ( DaoCriteria crit ) : int
crit Azavea.Open.DAO.Criteria.DaoCriteria The query being run.
return int

GetPossibleMatches() public method

Uses the index to return the smallest number of possible matches for this criteria.
public GetPossibleMatches ( DaoCriteria crit ) : IList
crit Azavea.Open.DAO.Criteria.DaoCriteria The query being run.
return IList

MultiPropertyMemoryIndex() public method

This is an index that has a nested index (I.E. an index on two or more fields).
public MultiPropertyMemoryIndex ( MemoryDaLayer layer, string property, List nextProperties, IEnumerable objects ) : System
layer MemoryDaLayer Data access layer in use.
property string Property for this index.
nextProperties List Properties for the child indexes. Must have at least one.
objects IEnumerable All objects that will be in this index and its children.
return System

Rebuild() public method

This method rebuilds the index given a new list of data objects.
public Rebuild ( IEnumerable objects ) : void
objects IEnumerable All the objects in the data store.
return void