Uses of Interface
org.apache.flink.api.java.functions.KeySelector

Packages that use KeySelector

Package	Description
org.apache.flink.api.java
org.apache.flink.api.java.operators
org.apache.flink.api.java.operators.translation
org.apache.flink.api.java.typeutils

Uses of KeySelector in org.apache.flink.api.java

Methods in org.apache.flink.api.java with parameters of type KeySelector

Modifier and Type	Method and Description
<K> DistinctOperator<T>	DataSet.distinct(KeySelector<T,K> keyExtractor) Returns a distinct set of a DataSet using a KeySelector function.
<K> UnsortedGrouping<T>	DataSet.groupBy(KeySelector<T,K> keyExtractor) Groups a DataSet using a KeySelector function.
<K extends Comparable<K>> PartitionOperator<T>	DataSet.partitionByHash(KeySelector<T,K> keyExtractor) Partitions a DataSet using the specified KeySelector.
<K extends Comparable<K>> PartitionOperator<T>	DataSet.partitionCustom(org.apache.flink.api.common.functions.Partitioner<K> partitioner, KeySelector<T,K> keyExtractor) Partitions a DataSet on the key returned by the selector, using a custom partitioner.

Uses of KeySelector in org.apache.flink.api.java.operators

Methods in org.apache.flink.api.java.operators that return KeySelector

Modifier and Type	Method and Description
KeySelector<T,K>	Keys.SelectorFunctionKeys.getKeyExtractor()

Methods in org.apache.flink.api.java.operators with parameters of type KeySelector

Modifier and Type	Method and Description
<K> JoinOperator.DefaultJoin<I1,I2>	JoinOperator.JoinOperatorSets.JoinOperatorSetsPredicate.equalTo(KeySelector<I2,K> keySelector) Continues a Join transformation and defines a KeySelector function for the second join DataSet. The KeySelector function is called for each element of the second DataSet and extracts a single key value on which the DataSet is joined.
<K> CoGroupOperator.CoGroupOperatorSets.CoGroupOperatorSetsPredicate.CoGroupOperatorWithoutFunction	CoGroupOperator.CoGroupOperatorSets.CoGroupOperatorSetsPredicate.equalTo(KeySelector<I2,K> keyExtractor) Continues a CoGroup transformation and defines a KeySelector function for the second co-grouped DataSet. The KeySelector function is called for each element of the second DataSet and extracts a single key value on which the DataSet is grouped.
<K> SortedGrouping<T>	UnsortedGrouping.sortGroup(KeySelector<T,K> keySelector, org.apache.flink.api.common.operators.Order order) Sorts elements within a group on a key extracted by the specified KeySelector in the specified Order. Chaining UnsortedGrouping.sortGroup(KeySelector, Order) calls is not supported.
<K> JoinOperator.JoinOperatorSets.JoinOperatorSetsPredicate	JoinOperator.JoinOperatorSets.where(KeySelector<I1,K> keySelector) Continues a Join transformation and defines a KeySelector function for the first join DataSet. The KeySelector function is called for each element of the first DataSet and extracts a single key value on which the DataSet is joined.
<K> CoGroupOperator.CoGroupOperatorSets.CoGroupOperatorSetsPredicate	CoGroupOperator.CoGroupOperatorSets.where(KeySelector<I1,K> keyExtractor) Continues a CoGroup transformation and defines a KeySelector function for the first co-grouped DataSet. The KeySelector function is called for each element of the first DataSet and extracts a single key value on which the DataSet is grouped.

Constructors in org.apache.flink.api.java.operators with parameters of type KeySelector

Constructor and Description
SelectorFunctionKeys(KeySelector<T,K> keyExtractor, org.apache.flink.api.common.typeinfo.TypeInformation<T> inputType, org.apache.flink.api.common.typeinfo.TypeInformation<K> keyType)

Uses of KeySelector in org.apache.flink.api.java.operators.translation

Constructors in org.apache.flink.api.java.operators.translation with parameters of type KeySelector

Constructor and Description
KeyExtractingMapper(KeySelector<T,K> keySelector)
TwoKeyExtractingMapper(KeySelector<T,K1> keySelector1, KeySelector<T,K2> keySelector2)
TwoKeyExtractingMapper(KeySelector<T,K1> keySelector1, KeySelector<T,K2> keySelector2)

Uses of KeySelector in org.apache.flink.api.java.typeutils

Methods in org.apache.flink.api.java.typeutils with parameters of type KeySelector

Modifier and Type	Method and Description
static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	TypeExtractor.getKeySelectorTypes(KeySelector<IN,OUT> selectorInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType)
static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	TypeExtractor.getKeySelectorTypes(KeySelector<IN,OUT> selectorInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType, String functionName, boolean allowMissing)