org.apache.avro

Class Resolver.RecordAdjust

java.lang.Object

org.apache.avro.Resolver.Action

org.apache.avro.Resolver.RecordAdjust

Enclosing class:

Resolver

public static class Resolver.RecordAdjust
extends Resolver.Action

Instructions for resolving two record schemas. Includes instructions on how to recursively resolve each field, an indication of when to skip (writer fields), plus information about which reader fields should be populated by defaults (because the writer doesn't have corresponding fields).

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.avro.Resolver.Action

Resolver.Action.Type

Field Summary

Fields

Modifier and Type	Field and Description
Object[]	defaults Contains the default values to be used for the last readerOrder.length-firstDefault fields in rearderOrder.
Resolver.Action[]	fieldActions An action for each field of the writer.
int	firstDefault Pointer into readerOrder of the first reader field whose value comes from a default value.
GenericData.InstanceSupplier	instanceSupplier Supplier that offers an optimized alternative to data.newRecord()
Schema.Field[]	readerOrder Contains (all of) the reader's fields.

Fields inherited from class org.apache.avro.Resolver.Action

conversion, logicalType, reader, type, writer

Method Summary

Modifier and Type	Method and Description
boolean	noReorder() Returns true iff i == readerOrder[i].pos() for all indices i.

Methods inherited from class java.lang.Object

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

Field Detail

fieldActions

public final Resolver.Action[] fieldActions

An action for each field of the writer. If the corresponding field is to be skipped during reading, then this will contain a Resolver.Skip. For fields to be read into the reading datum, will contain a regular action for resolving the writer/reader schemas of the matching fields.

readerOrder

public final Schema.Field[] readerOrder

Contains (all of) the reader's fields. The first n of these are the fields that will be read from the writer: these n are in the order dictated by writer's schema. The remaining m fields will be read from default values (actions for these default values are found in defaults.

firstDefault

public final int firstDefault

Pointer into readerOrder of the first reader field whose value comes from a default value. Set to length of readerOrder if there are none.

defaults

public final Object[] defaults

Contains the default values to be used for the last readerOrder.length-firstDefault fields in rearderOrder. The ith element of defaults is the default value for the i+firstDefault member of readerOrder.

instanceSupplier

public final GenericData.InstanceSupplier instanceSupplier

Supplier that offers an optimized alternative to data.newRecord()

Method Detail

noReorder

public boolean noReorder()

Returns true iff i == readerOrder[i].pos() for all indices i. Which is to say: the order of the reader's fields is the same in both the reader's and writer's schema.