org.apache.flink.api.java.operators

类 ProjectOperator<IN,OUT extends org.apache.flink.api.java.tuple.Tuple>

java.lang.Object

org.apache.flink.api.java.DataSet<OUT>

org.apache.flink.api.java.operators.Operator<OUT,O>

org.apache.flink.api.java.operators.SingleInputOperator<IN,OUT,ProjectOperator<IN,OUT>>

org.apache.flink.api.java.operators.ProjectOperator<IN,OUT>

类型参数:

IN - The type of the data set projected by the operator.

OUT - The type of data set that is the result of the projection.

@Public
public class ProjectOperator<IN,OUT extends org.apache.flink.api.java.tuple.Tuple>
extends SingleInputOperator<IN,OUT,ProjectOperator<IN,OUT>>

This operator represents the application of a projection operation on a data set, and the result data set produced by the function.

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	ProjectOperator.Projection<T> A projection of DataSet.

字段概要

字段

限定符和类型	字段和说明
protected int[]	fields

从类继承的字段 org.apache.flink.api.java.operators.Operator

minResources, name, parallelism, preferredResources

从类继承的字段 org.apache.flink.api.java.DataSet

context

构造器概要

构造器

构造器和说明
ProjectOperator(DataSet<IN> input, int[] fields, org.apache.flink.api.java.typeutils.TupleTypeInfo<OUT> returnType)

方法概要

限定符和类型	方法和说明
protected org.apache.flink.api.common.operators.base.MapOperatorBase<IN,OUT,org.apache.flink.api.common.functions.MapFunction<IN,OUT>>	translateToDataFlow(org.apache.flink.api.common.operators.Operator<IN> input) Translates this operation to a data flow operator of the common data flow API.
<R extends org.apache.flink.api.java.tuple.Tuple> ProjectOperator<IN,R>	types(Class<?>... types) 已过时。 Deprecated method only kept for compatibility.

从类继承的方法 org.apache.flink.api.java.operators.SingleInputOperator

getInput, getInputType

从类继承的方法 org.apache.flink.api.java.operators.Operator

getMinResources, getName, getParallelism, getPreferredResources, getResultType, name, setParallelism

从类继承的方法 org.apache.flink.api.java.DataSet

aggregate, checkSameExecutionContext, clean, coGroup, collect, combineGroup, count, cross, crossWithHuge, crossWithTiny, distinct, distinct, distinct, distinct, fillInType, filter, first, flatMap, fullOuterJoin, fullOuterJoin, getExecutionEnvironment, getType, groupBy, groupBy, groupBy, iterate, iterateDelta, join, join, joinWithHuge, joinWithTiny, leftOuterJoin, leftOuterJoin, map, mapPartition, max, maxBy, min, minBy, output, partitionByHash, partitionByHash, partitionByHash, partitionByRange, partitionByRange, partitionByRange, partitionCustom, partitionCustom, partitionCustom, print, print, printOnTaskManager, printToErr, printToErr, project, rebalance, reduce, reduceGroup, rightOuterJoin, rightOuterJoin, runOperation, sortPartition, sortPartition, sortPartition, sum, union, write, write, writeAsCsv, writeAsCsv, writeAsCsv, writeAsCsv, writeAsFormattedText, writeAsFormattedText, writeAsText, writeAsText

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

fields

protected final int[] fields

构造器详细资料

ProjectOperator

public ProjectOperator(DataSet<IN> input,
                       int[] fields,
                       org.apache.flink.api.java.typeutils.TupleTypeInfo<OUT> returnType)

方法详细资料

translateToDataFlow

protected org.apache.flink.api.common.operators.base.MapOperatorBase<IN,OUT,org.apache.flink.api.common.functions.MapFunction<IN,OUT>> translateToDataFlow(org.apache.flink.api.common.operators.Operator<IN> input)

从类复制的说明: SingleInputOperator

Translates this operation to a data flow operator of the common data flow API.

指定者:

translateToDataFlow 在类中 SingleInputOperator<IN,OUT extends org.apache.flink.api.java.tuple.Tuple,ProjectOperator<IN,OUT extends org.apache.flink.api.java.tuple.Tuple>>

参数:

input - The data flow operator that produces this operation's input data.

返回:

The translated data flow operator.

types

@Deprecated
 @PublicEvolving
public <R extends org.apache.flink.api.java.tuple.Tuple> ProjectOperator<IN,R> types(Class<?>... types)

已过时。 Deprecated method only kept for compatibility.