java
How to form a list of maps in java spark
root |-- code: string (nullable = true) |-- mnemonic: string (nullable = true) |-- key: long (nullable = true) |-- country: string (nullable = true) |-- crossID: struct (nullable = false) | |-- codeKey: long (nullable = true) | |-- codeGroupCode: string (nullable = true) | |-- description: string (nullable = true) | |-- externalCode: string (nullable = true) |-- ITEM: struct (nullable = false) | |-- type: string (nullable = true) | |-- indicator: string (nullable = true) | |-- imageIndicator: string (nullable = true) | |-- col20: struct (nullable = false) | | |-- cCode: string (nullable = true) | | |-- vCode: string (nullable = true) The above is the schema of my dataframe. Here I would like group the crossID and its elements as list of maps. Please help me how to do it in java spark.
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