init() public method Initializes the migration.

removeMigrationHistory() protected method Removes existing

mapReduce() public method Performs MongoDB "map-reduce"

find() public static method Creates an

drop() public method Drops this collection.

validateNamespace() public method Validates the

$collection public property File collection to be used.

getChunkIterator() public method Returns iterator for

buildBetweenCondition() public method Creates an Mongo

$db public property The DB connection object or the application