org.apache.avro.message

Interface MessageDecoder<D>

Type Parameters:

D - a datum class

All Known Implementing Classes:

BinaryMessageDecoder, MessageDecoder.BaseDecoder, RawMessageDecoder

public interface MessageDecoder<D>

Deserializes a single datum from a ByteBuffer, byte array, or InputStream.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	MessageDecoder.BaseDecoder<D> Base class for MessageEncoder implementations that provides default implementations for most of the DatumEncoder API.

Method Summary

Methods

Modifier and Type	Method and Description
D	decode(byte[] encoded) Deserialize a single datum from a byte array.
D	decode(byte[] encoded, D reuse) Deserialize a single datum from a byte array.
D	decode(ByteBuffer encoded) Deserialize a single datum from a ByteBuffer.
D	decode(ByteBuffer encoded, D reuse) Deserialize a single datum from a ByteBuffer.
D	decode(InputStream stream) Deserialize a single datum from an InputStream.
D	decode(InputStream stream, D reuse) Deserialize a single datum from an InputStream.

Method Detail

decode

D decode(InputStream stream)
         throws IOException

Deserialize a single datum from an InputStream.

Parameters:

stream - stream to read from

Returns:

a datum read from the stream

Throws:

BadHeaderException - If the payload's header is not recognized.

MissingSchemaException - If the payload's schema cannot be found.

IOException

decode

D decode(InputStream stream,
       D reuse)
         throws IOException

Deserialize a single datum from an InputStream.

Parameters:

stream - stream to read from

reuse - a datum instance to reuse, avoiding instantiation if possible

Returns:

a datum read from the stream

Throws:

BadHeaderException - If the payload's header is not recognized.

MissingSchemaException - If the payload's schema cannot be found.

IOException

decode

D decode(ByteBuffer encoded)
         throws IOException

Deserialize a single datum from a ByteBuffer.

Parameters:

encoded - a ByteBuffer containing an encoded datum

Returns:

a datum read from the stream

Throws:

BadHeaderException - If the payload's header is not recognized.

MissingSchemaException - If the payload's schema cannot be found.

IOException

decode

D decode(ByteBuffer encoded,
       D reuse)
         throws IOException

Deserialize a single datum from a ByteBuffer.

Parameters:

encoded - a ByteBuffer containing an encoded datum

reuse - a datum instance to reuse, avoiding instantiation if possible

Returns:

a datum read from the stream

Throws:

BadHeaderException - If the payload's header is not recognized.

MissingSchemaException - If the payload's schema cannot be found.

IOException

decode

D decode(byte[] encoded)
         throws IOException

Deserialize a single datum from a byte array.

Parameters:

encoded - a byte array containing an encoded datum

Returns:

a datum read from the stream

Throws:

BadHeaderException - If the payload's header is not recognized.

MissingSchemaException - If the payload's schema cannot be found.

IOException

decode

D decode(byte[] encoded,
       D reuse)
         throws IOException

Deserialize a single datum from a byte array.

Parameters:

encoded - a byte array containing an encoded datum

reuse - a datum instance to reuse, avoiding instantiation if possible

Returns:

a datum read from the stream

Throws:

BadHeaderException - If the payload's header is not recognized.

MissingSchemaException - If the payload's schema cannot be found.

IOException