Examples of co.cask.cdap.internal.io.ReflectionSchemaGenerator

co.cask.cdap.internal.io.ReflectionSchemaGenerator
This class uses Java Reflection to inspect fields in any Java class to generate RECORD schema.

If the given type is a class, it will uses the class fields (includes all the fields in parent classes) to generate the schema. All fields, no matter what access it is would be included, except transient or synthetic one.

If the given type is an interface, it will uses all getter methods (methods that prefix with "get" or "is", followed by a name with no arguments) to generate fields for the record schema. E.g. for the method {@code String getFirstName()}, a field name "firstName" of type String would be generated.

    throw new UnsupportedTypeException("Dataset neither implements RecordScannable not RecordWritable.");
  }


  static String hiveSchemaFor(Type type) throws UnsupportedTypeException {
    // This call will make sure that the type is not recursive
    new ReflectionSchemaGenerator().generate(type, false);


    ObjectInspector objectInspector = ObjectInspectorFactory.getReflectionObjectInspector(type);
    if (!(objectInspector instanceof StructObjectInspector)) {
      throw new UnsupportedTypeException(String.format("Type must be a RECORD, but is %s",
                                                       type.getClass().getName()));

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  private static InputSupplier<InputStream> getInputSupplier(final ApplicationSpecification appSpec) {
    return new InputSupplier<InputStream>() {
      @Override
      public InputStream getInput() throws IOException {
        String json = ApplicationSpecificationAdapter.create(new ReflectionSchemaGenerator()).toJson(appSpec);
        return new ByteArrayInputStream(json.getBytes(Charsets.UTF_8));
      }
    };
  }

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    ApplicationSpecification specification = configurer.createApplicationSpec();


    // Convert the specification to JSON.
    // We write the Application specification to output file in JSON format.
    // TODO: The SchemaGenerator should be injected
    return ApplicationSpecificationAdapter.create(new ReflectionSchemaGenerator()).toJson(specification);
  }

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   */
  public LocalArchiveLoaderStage(Id.Account id, @Nullable String appId) {
    super(TypeToken.of(Location.class));
    this.id = id;
    this.appId = appId;
    this.adapter = ApplicationSpecificationAdapter.create(new ReflectionSchemaGenerator());
  }

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      // We write the Application specification to output file in JSON format.
      try {
        Writer writer = Files.newWriter(outputFile, Charsets.UTF_8);
        try {
          // TODO: The SchemaGenerator should be injected.
          ApplicationSpecificationAdapter.create(new ReflectionSchemaGenerator()).toJson(specification, writer);
        } finally {
          writer.close();
        }
      } catch (IOException e) {
        LOG.error("Error writing to file {}. {}", outputFile, e.getMessage());

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   * @return {@link DatasetProperties} for the dataset
   * @throws UnsupportedTypeException
   */
  public static DatasetProperties objectStoreProperties(Type type, DatasetProperties props)
    throws UnsupportedTypeException {
    Schema schema = new ReflectionSchemaGenerator().generate(type);
    TypeRepresentation typeRep = new TypeRepresentation(type);
    return DatasetProperties.builder()
      .add("schema", GSON.toJson(schema))
      .add("type", GSON.toJson(typeRep))
      .addAll(props.getProperties())

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co.cask.cdap.internal.app.deploy.InMemoryConfigurator

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