Package org.opensearch.ml.common.dataframe

Class DataFrameBuilder

java.lang.Object

org.opensearch.ml.common.dataframe.DataFrameBuilder

public final class DataFrameBuilder
extends Object

Method Summary

Modifier and Type	Method	Description
static DataFrame	emptyDataFrame(ColumnMeta[] columnMetas)	Build empty data frame without any real data.
static DataFrame	load(List<Map<String,Object>> input)	Load data frame based on list of map objects.
static DataFrame	load(org.opensearch.core.common.io.stream.StreamInput input)	Load data frame from stream input.
static DataFrame	load(ColumnMeta[] columnMetas, List<Map<String,Object>> input)	Load data frame given columnMetas, and list of map objects.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

emptyDataFrame

public static DataFrame emptyDataFrame(ColumnMeta[] columnMetas)

Build empty data frame without any real data.

Parameters:

columnMetas - column metas

Returns:

empty data frame

load

public static DataFrame load(List<Map<String,Object>> input)

Load data frame based on list of map objects. It will use the first object to build the ColumnMeta, and all of the map objects should have same key set, other wise it will throw exception.

Parameters:

input - input list of map objects

Returns:

data frame

load

public static DataFrame load(ColumnMeta[] columnMetas,
 List<Map<String,Object>> input)

Load data frame given columnMetas, and list of map objects. and all of the map objects should have same key set, otherwise it will throw exception.

Parameters:

columnMetas - array of ColumnMeta

input - input list of map objects

Returns:

data frame

load

public static DataFrame load(org.opensearch.core.common.io.stream.StreamInput input)
                      throws IOException

Load data frame from stream input.

Parameters:

input - stream input

Returns:

data frame

Throws:

IOException