SortFns (Apache Crunch 0.9.0 API)

This project has retired. For details please refer to its Attic page.

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org.apache.crunch.lib.sort
Class SortFns

java.lang.Object
  org.apache.crunch.lib.sort.SortFns

public class SortFns
extends Object
extends Object

A set of DoFns that are used by Crunch's Sort library.

Nested Class Summary

static class SortFns.AvroGenericFn<V extends Tuple>
          Pulls a composite set of keys from an Avro GenericRecord instance.

static class SortFns.KeyExtraction<V extends Tuple>
          Utility class for encapsulating key extraction logic and serialization information about key extraction.

static class SortFns.SingleKeyFn<V extends Tuple,K>
          Extracts a single indexed key from a Tuple instance.

static class SortFns.TupleKeyFn<V extends Tuple,K extends Tuple>
          Extracts a composite key from a Tuple instance.

Constructor Summary

SortFns()


Method Summary

static <S> org.apache.avro.Schema createOrderedTupleSchema(PType<S> ptype, Sort.ColumnOrder[] orders)
          Constructs an Avro schema for the given PType<S> that respects the given column orderings.

Methods inherited from class java.lang.Object

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

Nested Class Summary
`static class`	`SortFns.AvroGenericFn<V extends Tuple>` Pulls a composite set of keys from an Avro `GenericRecord` instance.
`static class`	`SortFns.KeyExtraction<V extends Tuple>` Utility class for encapsulating key extraction logic and serialization information about key extraction.
`static class`	`SortFns.SingleKeyFn<V extends Tuple,K>` Extracts a single indexed key from a `Tuple` instance.
`static class`	`SortFns.TupleKeyFn<V extends Tuple,K extends Tuple>` Extracts a composite key from a `Tuple` instance.

Constructor Summary
`SortFns()`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

SortFns

public SortFns()

Method Detail

createOrderedTupleSchema

public static <S> org.apache.avro.Schema createOrderedTupleSchema(PType<S> ptype,
                                                                  Sort.ColumnOrder[] orders)

Constructs an Avro schema for the given PType<S> that respects the given column orderings.