Package org.apache.avro

Avro kernel classes.

See: Description

Class Summary

Class	Description
JsonProperties	Base class for objects that have Json-valued properties.
Protocol	A set of messages forming an application protocol.
Schema	An abstract data type.
Schema.Field	A field within a record.
Schema.Parser	A parser for JSON-format schemas.
SchemaNormalization	Collection of static methods for generating the cannonical form of schemas (see SchemaNormalization.toParsingForm(org.apache.avro.Schema)) -- and fingerprints of cannonical forms (SchemaNormalization.fingerprint(java.lang.String, byte[])).

Enum Summary

Enum	Description
Schema.Field.Order	How values of this field should be ordered when sorting records.
Schema.Type	The type of a schema.

Exception Summary

Exception	Description
AvroRemoteException	Base class for exceptions thrown to client by server.
AvroRuntimeException	Base Avro exception.
AvroTypeException	Thrown when an illegal type is used.
SchemaParseException	Thrown for errors parsing schemas and protocols.
UnresolvedUnionException	Thrown when the expected contents of a union cannot be resolved.

Package org.apache.avro Description

Avro kernel classes.

A Schema provides an abstract definition of a data type.

The in-memory representation of data is determined by DatumReader and DatumWriter implementations. Generic implementations are provided in the org.apache.avro.generic package. A compiler can generate specific java classes and interfaces for schemas and protocols. Schemas may be automatically generated for existing Java classes by reflection using the org.apache.avro.reflect package.

Data of a given schema is always serialized identically, regardless of its in-memory representation, by traversing the schema and writing leaf values from the data structure with a Encoder. Deserializing similarly proceeds by traversing the schema, reading leaf values with a Decoder and storing them in an in-memory data structure.