org.apache.flink.api.java.operators

Class Keys.FieldPositionKeys<T>

java.lang.Object

org.apache.flink.api.java.operators.Keys<T>

org.apache.flink.api.java.operators.Keys.FieldPositionKeys<T>

Enclosing class:

Keys<T>

public static class Keys.FieldPositionKeys<T>
extends Keys<T>

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.api.java.operators.Keys

Keys.ExpressionKeys<T>, Keys.FieldPositionKeys<T>, Keys.SelectorFunctionKeys<T,K>

Constructor Summary

Constructors

Constructor and Description
Keys.FieldPositionKeys(int[] groupingFields, TypeInformation<T> type)
Keys.FieldPositionKeys(int[] groupingFields, TypeInformation<T> type, boolean allowEmpty)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	areCompatibale(Keys<?> other)
int[]	computeLogicalKeyPositions()
int	getNumberOfKeyFields()
String	toString()

Methods inherited from class org.apache.flink.api.java.operators.Keys

isEmpty

Methods inherited from class java.lang.Object

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

Constructor Detail

Keys.FieldPositionKeys

public Keys.FieldPositionKeys(int[] groupingFields,
                      TypeInformation<T> type)

Keys.FieldPositionKeys

public Keys.FieldPositionKeys(int[] groupingFields,
                      TypeInformation<T> type,
                      boolean allowEmpty)

Method Detail

getNumberOfKeyFields

public int getNumberOfKeyFields()

Specified by:

getNumberOfKeyFields in class Keys<T>

areCompatibale

public boolean areCompatibale(Keys<?> other)

Specified by:

areCompatibale in class Keys<T>

computeLogicalKeyPositions

public int[] computeLogicalKeyPositions()

Specified by:

computeLogicalKeyPositions in class Keys<T>

toString

public String toString()

Overrides:

toString in class Object