Package org.apache.avro.io

Examples of org.apache.avro.io.Decoder

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    writer.write(datum, encoder);
    encoder.flush();
    byte[] data = out.toByteArray();

    reader.setSchema(schema);
    Decoder decoder = DecoderFactory.get().jsonDecoder(schema,
        new ByteArrayInputStream(data));
    Object decoded = reader.read(null, decoder);
    assertEquals("Decoded data does not match.", datum, decoded);

    decoded = reader.read(decoded, decoder);
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    Encoder encoder = EncoderFactory.get().directBinaryEncoder(out, null);
    writer.write(new GenericData.EnumSymbol(actual, "Y"), encoder);
    writer.write(new GenericData.EnumSymbol(actual, "X"), encoder);
    encoder.flush();
    byte[] data = out.toByteArray();
    Decoder decoder = DecoderFactory.get().binaryDecoder(
        data, null);
    DatumReader<String> in = new GenericDatumReader<String>(actual, expected);
    assertEquals("Wrong value", new GenericData.EnumSymbol(expected, "Y"),
                 in.read(null, decoder));
    try {
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    writer.write(b, e);
    e.flush();
    ReflectDatumReader<AnotherSampleRecord> reader =
      new ReflectDatumReader<AnotherSampleRecord>(schm);
    ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
    Decoder d = DecoderFactory.get().binaryDecoder(in, null);
    AnotherSampleRecord decoded = reader.read(null, d);
    assertEquals(a, decoded);
    decoded = reader.read(null, d);
    assertEquals(b, decoded);
  }
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  /** Called by a server to deserialize a request, compute and serialize a
   * response or error.  Transciever is used by connection-based servers to
   * track handshake status of connection. */
  public List<ByteBuffer> respond(List<ByteBuffer> buffers,
                                  Transceiver connection) throws IOException {
    Decoder in = DecoderFactory.get().binaryDecoder(
        new ByteBufferInputStream(buffers), null);
    ByteBufferOutputStream bbo = new ByteBufferOutputStream();
    BinaryEncoder out = EncoderFactory.get().binaryEncoder(bbo, null);
    Exception error = null;
    RPCContext context = new RPCContext();
    List<ByteBuffer> payload = null;
    List<ByteBuffer> handshake = null;
    boolean wasConnected = connection != null && connection.isConnected();
    try {
      Protocol remote = handshake(in, out, connection);
      out.flush();
      if (remote == null)                        // handshake failed
        return bbo.getBufferList();
      handshake = bbo.getBufferList();
     
      // read request using remote protocol specification
      context.setRequestCallMeta(META_READER.read(null, in));
      String messageName = in.readString(null).toString();
      Message rm = remote.getMessages().get(messageName);
      if (rm == null)
        throw new AvroRuntimeException("No such remote message: "+messageName);
      Message m = getLocal().getMessages().get(messageName);
      if (m == null)
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    writer.write(b, e);
    e.flush();
    ReflectDatumReader<AnotherSampleRecord> reader =
      new ReflectDatumReader<AnotherSampleRecord>(schm);
    ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
    Decoder d = DecoderFactory.defaultFactory().createBinaryDecoder(in, null);
    AnotherSampleRecord decoded = reader.read(null, d);
    assertEquals(a, decoded);
    decoded = reader.read(null, d);
    assertEquals(b, decoded);
  }
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    return out.toByteArray();
  }

  @Override
  public T fromBytes(byte[] bytes) {
    Decoder decoder = DecoderFactory.get().binaryDecoder(bytes, null);
    try {
      return getReader().read(null, decoder);
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
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  public Object fromBytes(Schema schema, byte data[]) throws GoraException {
    Schema fromSchema = null;
    if (schema.getType() == Type.UNION) {
      try {
        Decoder decoder = DecoderFactory.get().binaryDecoder(data, null);
        int unionIndex = decoder.readIndex();
        List<Schema> possibleTypes = schema.getTypes();
        fromSchema = possibleTypes.get(unionIndex);
        Schema effectiveSchema = possibleTypes.get(unionIndex);
        if (effectiveSchema.getType() == Type.NULL) {
          decoder.readNull();
          return null;
        } else {
          data = decoder.readBytes(null).array();
        }
      } catch (IOException e) {
        e.printStackTrace();
        throw new GoraException("Error decoding union type: ", e);
      }
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                                                       IOException,
                                                       BadConfigException {
    try {
      DatumReader<RoleHistoryRecord> reader =
        new SpecificDatumReader<>(RoleHistoryRecord.class);
      Decoder decoder =
        DecoderFactory.get().jsonDecoder(RoleHistoryRecord.getClassSchema(),
                                         in);

      //read header : no entry -> EOF
      RoleHistoryRecord record = reader.read(null, decoder);
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    writer.write(datum, encoder); // boxed
    encoder.flush();
    out.close();
   
    DatumReader<Integer> reader = new GenericDatumReader<Integer>(schema); // have to tell it the schema - it's not in the data stream!
    Decoder decoder = DecoderFactory.get()
      .binaryDecoder(out.toByteArray(), null /* reuse */);
    Integer result = reader.read(null /* reuse */, decoder);
    assertThat(result, is(163));
   
    try {
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    writer.write(datum, encoder); // boxed
    encoder.flush();
    out.close();
   
    DatumReader<String> reader = new GenericDatumReader<String>(schema);
    Decoder decoder = DecoderFactory.get()
      .binaryDecoder(out.toByteArray(), null /* reuse */);
    String result = reader.read(null /* reuse */, decoder);
    assertThat(result, equalTo("foo"));
   
    try {
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Related Classes of org.apache.avro.io.Decoder

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  • avrobase.file.FAB
  • avrobase.file.FABTest
  • avrobase.Row
  • AvroTest
  • com.cloudera.cdk.data.hbase.avro.AvroEntitySerDe
  • com.cloudera.cdk.data.hbase.avro.AvroKeySerDe
  • com.cloudera.cdk.data.hbase.avro.AvroUtils
  • com.cloudera.cdk.data.hbase.avro.io.ColumnDecoderTest
  • com.cloudera.cdk.data.hbase.avro.io.MemcmpDecoderTest
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