Package org.apache.flink.streaming.util.keys

Class KeySelectorUtil

java.lang.Object
org.apache.flink.streaming.util.keys.KeySelectorUtil
@Internal public final class KeySelectorUtil extends Object
Utility class that contains helper methods to manipulating KeySelector for streaming.

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Class
    Description
    static final class 
    KeySelectorUtil.ArrayKeySelector<IN>
    A key selector for selecting individual array fields as keys and returns them as a Tuple.
    static final class 
    KeySelectorUtil.ComparableKeySelector<IN>
    A key selector for selecting key fields via a TypeComparator.
    static final class 
    KeySelectorUtil.OneKeySelector<IN,K>
    Key extractor that extracts a single field via a generic comparator.

  • Method Summary

    Modifier and Type
    Method
    Description
    static <X> KeySelectorUtil.ArrayKeySelector<X>
    getSelectorForArray(int[] positions, org.apache.flink.api.common.typeinfo.TypeInformation<X> typeInfo)
     
    static <X> org.apache.flink.api.java.functions.KeySelector<X,org.apache.flink.api.java.tuple.Tuple>
    getSelectorForKeys(org.apache.flink.api.common.operators.Keys<X> keys, org.apache.flink.api.common.typeinfo.TypeInformation<X> typeInfo, org.apache.flink.api.common.ExecutionConfig executionConfig)
     
    static <X, K> org.apache.flink.api.java.functions.KeySelector<X,K>
    getSelectorForOneKey(org.apache.flink.api.common.operators.Keys<X> keys, org.apache.flink.api.common.functions.Partitioner<K> partitioner, org.apache.flink.api.common.typeinfo.TypeInformation<X> typeInfo, org.apache.flink.api.common.ExecutionConfig executionConfig)
     

    Methods inherited from class java.lang.Object

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

  • Method Details

    • getSelectorForKeys

      public static <X> org.apache.flink.api.java.functions.KeySelector<X,org.apache.flink.api.java.tuple.Tuple> getSelectorForKeys(org.apache.flink.api.common.operators.Keys<X> keys, org.apache.flink.api.common.typeinfo.TypeInformation<X> typeInfo, org.apache.flink.api.common.ExecutionConfig executionConfig)

    • getSelectorForArray

      public static <X> KeySelectorUtil.ArrayKeySelector<X> getSelectorForArray(int[] positions, org.apache.flink.api.common.typeinfo.TypeInformation<X> typeInfo)

    • getSelectorForOneKey

      public static <X, K> org.apache.flink.api.java.functions.KeySelector<X,K> getSelectorForOneKey(org.apache.flink.api.common.operators.Keys<X> keys, org.apache.flink.api.common.functions.Partitioner<K> partitioner, org.apache.flink.api.common.typeinfo.TypeInformation<X> typeInfo, org.apache.flink.api.common.ExecutionConfig executionConfig)