Package com.mongodb

Class GroupCommand

  • Deprecated. 
    the group command was deprecated in MongoDB 3.4

    @Deprecated
public class GroupCommand
extends Object
    This class groups the argument for a group operation and can build the underlying command object
    MongoDB documentation
    Group

    • Constructor Detail

      • GroupCommand

        public GroupCommand​(DBCollection collection,
                    DBObject keys,
                    DBObject condition,
                    DBObject initial,
                    String reduce,
                    @Nullable
                    String finalize)
        Deprecated. 
        Creates a new group command.
        Parameters:
        collection - the collection from which to perform the group by operation.
        keys - the field or fields to group.
        condition - optional - a filter to determine which documents in the collection to process.
        initial - the initial state of the aggregation result document.
        reduce - a JavaScript aggregation function that operates on the documents during the grouping operation.
        finalize - optional - a JavaScript function that runs each item in the result set before group returns the final value.

      • GroupCommand

        public GroupCommand​(DBCollection collection,
                    DBObject keys,
                    DBObject condition,
                    DBObject initial,
                    String reduce,
                    @Nullable
                    String finalize,
                    @Nullable
                    Collation collation)
        Deprecated. 
        Creates a new group command.
        Parameters:
        collection - the collection from which to perform the group by operation.
        keys - the field or fields to group.
        condition - optional - a filter to determine which documents in the collection to process.
        initial - the initial state of the aggregation result document.
        reduce - a JavaScript aggregation function that operates on the documents during the grouping operation.
        finalize - optional - a JavaScript function that runs each item in the result set before group returns the final value.
        collation - optional - the collation options
        Since:
        3.4

      • GroupCommand

        public GroupCommand​(DBCollection collection,
                    String keyf,
                    DBObject condition,
                    DBObject initial,
                    String reduce,
                    String finalize)
        Deprecated. 
        Creates a new group command.
        Parameters:
        collection - the collection from which to perform the group by operation.
        keyf - the function that creates a "key object" for use as the grouping key
        condition - optional - a filter to determine which documents in the collection to process.
        initial - the initial state of the aggregation result document.
        reduce - a JavaScript aggregation function that operates on the documents during the grouping operation.
        finalize - optional - a JavaScript function that runs each item in the result set before group returns the final value.
        Since:
        3.1

      • GroupCommand

        public GroupCommand​(DBCollection collection,
                    String keyf,
                    DBObject condition,
                    DBObject initial,
                    String reduce,
                    @Nullable
                    String finalize,
                    @Nullable
                    Collation collation)
        Deprecated. 
        Creates a new group command.
        Parameters:
        collection - the collection from which to perform the group by operation.
        keyf - the function that creates a "key object" for use as the grouping key
        condition - optional - a filter to determine which documents in the collection to process.
        initial - the initial state of the aggregation result document.
        reduce - a JavaScript aggregation function that operates on the documents during the grouping operation.
        finalize - optional - a JavaScript function that runs each item in the result set before group returns the final value.
        collation - optional - the collation options
        Since:
        3.4

    • Method Detail

      • toDBObject

        public DBObject toDBObject​()
        Deprecated. 
        Turns this group command into the DBObject format of the command.
        Returns:
        a DBObject containing the group command as a MongoDB document