org.apache.crunch.lib.sort

Class SortFns

java.lang.Object

org.apache.crunch.lib.sort.SortFns

public class SortFns
extends Object

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

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
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

Constructors

Constructor and Description
SortFns()

Method Summary

Modifier and Type	Method and Description
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

equals, 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.