Package org.apache.beam.sdk.schemas

Class AvroRecordSchema

java.lang.Object

org.apache.beam.sdk.schemas.GetterBasedSchemaProvider

org.apache.beam.sdk.schemas.AvroRecordSchema

All Implemented Interfaces:

java.io.Serializable, SchemaProvider

public class AvroRecordSchema
extends GetterBasedSchemaProvider

A SchemaProvider for AVRO generated SpecificRecords and POJOs.

This provider infers a schema from generated SpecificRecord objects, and creates schemas and rows that bind to the appropriate fields. This provider also infers schemas from Java POJO objects, creating a schema that matches that inferred by the AVRO libraries.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
AvroRecordSchema()

Method Summary

Modifier and Type	Method	Description
java.util.List<FieldValueGetter>	fieldValueGetters(java.lang.Class<?> targetClass, Schema schema)	Implementing class should override to return FieldValueGetters.
java.util.List<FieldValueTypeInformation>	fieldValueTypeInformations(java.lang.Class<?> targetClass, Schema schema)	Implementing class should override to return a list of type-informations.
<T> Schema	schemaFor(TypeDescriptor<T> typeDescriptor)	Lookup a schema for the given type.
SchemaUserTypeCreator	schemaTypeCreator(java.lang.Class<?> targetClass, Schema schema)	Implementing class should override to return a constructor.

Methods inherited from class org.apache.beam.sdk.schemas.GetterBasedSchemaProvider

equals, fromRowFunction, hashCode, toRowFunction

Methods inherited from class java.lang.Object

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

Constructor Detail

AvroRecordSchema

public AvroRecordSchema()

Method Detail

schemaFor

public <T> Schema schemaFor(TypeDescriptor<T> typeDescriptor)

Description copied from interface: SchemaProvider

Lookup a schema for the given type. If no schema exists, returns null.

fieldValueGetters

public java.util.List<FieldValueGetter> fieldValueGetters(java.lang.Class<?> targetClass,
                                                          Schema schema)

Description copied from class: GetterBasedSchemaProvider

Implementing class should override to return FieldValueGetters.

Specified by:

fieldValueGetters in class GetterBasedSchemaProvider

fieldValueTypeInformations

public java.util.List<FieldValueTypeInformation> fieldValueTypeInformations(java.lang.Class<?> targetClass,
                                                                            Schema schema)

Description copied from class: GetterBasedSchemaProvider

Implementing class should override to return a list of type-informations.

Specified by:

fieldValueTypeInformations in class GetterBasedSchemaProvider

schemaTypeCreator

public SchemaUserTypeCreator schemaTypeCreator(java.lang.Class<?> targetClass,
                                               Schema schema)

Description copied from class: GetterBasedSchemaProvider

Implementing class should override to return a constructor.

Specified by:

schemaTypeCreator in class GetterBasedSchemaProvider