org.apache.flink.ml.common.mapper

类 Mapper

java.lang.Object

org.apache.flink.ml.common.mapper.Mapper

所有已实现的接口:

Serializable

直接已知子类:

ModelMapper

public abstract class Mapper
extends Object
implements Serializable

Abstract class for mappers. A mapper takes one row as input and transform it into another row.

另请参阅:

序列化表格

字段概要

字段

限定符和类型	字段和说明
protected org.apache.flink.ml.api.misc.param.Params	params Parameters for the Mapper.

构造器概要

构造器

构造器和说明
Mapper(org.apache.flink.table.api.TableSchema dataSchema, org.apache.flink.ml.api.misc.param.Params params) Construct a Mapper.

方法概要

限定符和类型	方法和说明
protected org.apache.flink.table.api.TableSchema	getDataSchema() Get the schema of input rows.
abstract org.apache.flink.table.api.TableSchema	getOutputSchema() Get the schema of the output rows of map(Row) method.
abstract org.apache.flink.types.Row	map(org.apache.flink.types.Row row) Map a row to a new row.

从类继承的方法 java.lang.Object

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

字段详细资料

params

protected final org.apache.flink.ml.api.misc.param.Params params

Parameters for the Mapper. Users can set the params before the Mapper is executed.

构造器详细资料

Mapper

public Mapper(org.apache.flink.table.api.TableSchema dataSchema,
              org.apache.flink.ml.api.misc.param.Params params)

Construct a Mapper.

参数:

dataSchema - The schema of input rows.

params - The parameters for this mapper.

方法详细资料

getDataSchema

protected org.apache.flink.table.api.TableSchema getDataSchema()

Get the schema of input rows.

返回:

The schema of input rows.

map

public abstract org.apache.flink.types.Row map(org.apache.flink.types.Row row)
                                        throws Exception

Map a row to a new row.

参数:

row - The input row.

返回:

A new row.

抛出:

Exception - This method may throw exceptions. Throwing an exception will cause the operation to fail.

getOutputSchema

public abstract org.apache.flink.table.api.TableSchema getOutputSchema()

Get the schema of the output rows of map(Row) method.

返回:

The table schema of the output rows of map(Row) method.