Package org.apache.avro

Class Resolver.Promote

java.lang.Object

org.apache.avro.Resolver.Action

org.apache.avro.Resolver.Promote

Enclosing class:

Resolver

public static class Resolver.Promote
extends Resolver.Action

In this case, the writer's type needs to be promoted to the reader's. These are constructed by resolve(org.apache.avro.Schema, org.apache.avro.Schema, org.apache.avro.generic.GenericData), which will only construct one when the writer's and reader's schemas are different (ie, no "self promotion"), and whent the promotion is one allowed by the Avro spec.

Nested Class Summary

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

Resolver.Action.Type

Field Summary

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

conversion, logicalType, reader, type, writer

Method Summary

Modifier and Type	Method	Description
static boolean	isValid(Schema w, Schema r)	Returns true iff w and r are both primitive types and either they are the same type or w is promotable to r.
static Resolver.Action	resolve(Schema w, Schema r, GenericData d)	Return a promotion.

Methods inherited from class java.lang.Object

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

Method Details

resolve

public static Resolver.Action resolve(Schema w,
 Schema r,
 GenericData d)

Return a promotion.

Parameters:

w - Writer's schema

r - Rearder's schema

Returns:

a Resolver.Promote schema if the two schemas are compatible, or Resolver.ErrorAction.ErrorType.INCOMPATIBLE_SCHEMA_TYPES if they are not.

Throws:

IllegalArgumentException - if getType() of the two schemas are not different.

isValid

public static boolean isValid(Schema w,
 Schema r)

Returns true iff w and r are both primitive types and either they are the same type or w is promotable to r. Should