Examples of org.apache.avro.generic.GenericDatumReader

org.apache.avro.generic.GenericDatumReader
{@link DatumReader} for generic Java objects.

         this.schema = schema;
         this.id = id;
      }


      Object read(Decoder decoder) throws IOException {
         return new GenericDatumReader(schema).read(null, decoder);
      }

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         super(STRING_SCHEMA, id);
      }


      @Override
      Object read(Decoder decoder) throws IOException {
         return new GenericDatumReader(schema).read(null, decoder).toString();
      }

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         super(BYTES_SCHEMA, id);
      }


      @Override
      Object read(Decoder decoder) throws IOException {
         java.nio.ByteBuffer byteBuffer = (java.nio.ByteBuffer) new GenericDatumReader(schema).read(null, decoder);
         byte[] bytes = new byte[byteBuffer.limit()]; // TODO: Limit or capacity ? Limit works
         byteBuffer.get(bytes);
         return bytes;
      }

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         super(STRING_ARRAY_SCHEMA, id);
      }


      @Override
      Object read(Decoder decoder) throws IOException {
         GenericData.Array<Utf8> utf8s = (GenericData.Array<Utf8>) new GenericDatumReader(schema).read(null, decoder);
         List<String> strings = new ArrayList<String>((int) utf8s.size());
         for (Utf8 utf8 : utf8s)
            strings.add(utf8.toString());
         return strings.toArray(new String[0]);
      }

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      ResolvingGrammarGenerator.encode(
          encoder, field.schema(), defaultJsonValue);
      encoder.flush();
      decoder = DecoderFactory.get().binaryDecoder(
          baos.toByteArray(), decoder);
      defaultValue = new GenericDatumReader(
          field.schema()).read(null, decoder);
      defaultSchemaValues.putIfAbsent(field.pos(), defaultValue);
    }
    
    // Make a deep copy of the default value so that subsequent mutations

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      ResolvingGrammarGenerator.encode(
          encoder, field.schema(), defaultJsonValue);
      encoder.flush();
      decoder = DecoderFactory.get().binaryDecoder(
          baos.toByteArray(), decoder);
      defaultValue = new GenericDatumReader(
          field.schema()).read(null, decoder);
      defaultSchemaValues.putIfAbsent(field.pos(), defaultValue);
    }
    
    // Make a deep copy of the default value so that subsequent mutations

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  private List<Object> fromJson(Schema schema, File file) throws Exception {
    InputStream in = new FileInputStream(file);
    List<Object> data = new ArrayList<Object>();
    try {
      DatumReader reader = new GenericDatumReader(schema);
      Decoder decoder = DecoderFactory.get().jsonDecoder(schema, in);
      while (true)
        data.add(reader.read(null, decoder));
    } catch (EOFException e) {
    } finally {
      in.close();
    }
    return data;

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