Examples with ObjectMapper org.nd4j.shade.jackson.databind.ObjectMapper used on opensource projects

Example 6 with ObjectMapper

use of org.nd4j.shade.jackson.databind.ObjectMapper in project deeplearning4j by deeplearning4j.

the class TestCustomLayers method testCustomOutputLayerMLN.

@Test
public void testCustomOutputLayerMLN() {
    //First: Ensure that the CustomOutputLayer class is registered
    ObjectMapper mapper = NeuralNetConfiguration.mapper();
    AnnotatedClass ac = AnnotatedClass.construct(Layer.class, mapper.getSerializationConfig().getAnnotationIntrospector(), null);
    Collection<NamedType> types = mapper.getSubtypeResolver().collectAndResolveSubtypes(ac, mapper.getSerializationConfig(), mapper.getSerializationConfig().getAnnotationIntrospector());
    Set<Class<?>> registeredSubtypes = new HashSet<>();
    boolean found = false;
    for (NamedType nt : types) {
        System.out.println(nt);
        //            registeredSubtypes.add(nt.getType());
        if (nt.getType() == CustomOutputLayer.class)
            found = true;
    }
    assertTrue("CustomOutputLayer: not registered with NeuralNetConfiguration mapper", found);
    //Second: let's create a MultiLayerCofiguration with one, and check JSON and YAML config actually works...
    MultiLayerConfiguration conf = new NeuralNetConfiguration.Builder().seed(12345).learningRate(0.1).list().layer(0, new DenseLayer.Builder().nIn(10).nOut(10).build()).layer(1, new CustomOutputLayer.Builder(LossFunctions.LossFunction.MCXENT).nIn(10).nOut(10).build()).pretrain(false).backprop(true).build();
    String json = conf.toJson();
    String yaml = conf.toYaml();
    System.out.println(json);
    MultiLayerConfiguration confFromJson = MultiLayerConfiguration.fromJson(json);
    assertEquals(conf, confFromJson);
    MultiLayerConfiguration confFromYaml = MultiLayerConfiguration.fromYaml(yaml);
    assertEquals(conf, confFromYaml);
    //Third: check initialization
    Nd4j.getRandom().setSeed(12345);
    MultiLayerNetwork net = new MultiLayerNetwork(conf);
    net.init();
    assertTrue(net.getLayer(1) instanceof CustomOutputLayerImpl);
    //Fourth: compare to an equivalent standard output layer (should be identical)
    MultiLayerConfiguration conf2 = new NeuralNetConfiguration.Builder().seed(12345).learningRate(0.1).weightInit(WeightInit.XAVIER).list().layer(0, new DenseLayer.Builder().nIn(10).nOut(10).build()).layer(1, new OutputLayer.Builder(LossFunctions.LossFunction.MCXENT).nIn(10).nOut(10).build()).pretrain(false).backprop(true).build();
    Nd4j.getRandom().setSeed(12345);
    MultiLayerNetwork net2 = new MultiLayerNetwork(conf2);
    net2.init();
    assertEquals(net2.params(), net.params());
    INDArray testFeatures = Nd4j.rand(1, 10);
    INDArray testLabels = Nd4j.zeros(1, 10);
    testLabels.putScalar(0, 3, 1.0);
    DataSet ds = new DataSet(testFeatures, testLabels);
    assertEquals(net2.output(testFeatures), net.output(testFeatures));
    assertEquals(net2.score(ds), net.score(ds), 1e-6);
}

Example 7 with ObjectMapper

use of org.nd4j.shade.jackson.databind.ObjectMapper in project deeplearning4j by deeplearning4j.

the class TestCustomLayers method testJsonMultiLayerNetwork.

@Test
public void testJsonMultiLayerNetwork() {
    //First: Ensure that the CustomLayer class is registered
    ObjectMapper mapper = NeuralNetConfiguration.mapper();
    AnnotatedClass ac = AnnotatedClass.construct(Layer.class, mapper.getSerializationConfig().getAnnotationIntrospector(), null);
    Collection<NamedType> types = mapper.getSubtypeResolver().collectAndResolveSubtypes(ac, mapper.getSerializationConfig(), mapper.getSerializationConfig().getAnnotationIntrospector());
    Set<Class<?>> registeredSubtypes = new HashSet<>();
    boolean found = false;
    for (NamedType nt : types) {
        System.out.println(nt);
        //            registeredSubtypes.add(nt.getType());
        if (nt.getType() == CustomLayer.class)
            found = true;
    }
    assertTrue("CustomLayer: not registered with NeuralNetConfiguration mapper", found);
    //Second: let's create a MultiLayerCofiguration with one, and check JSON and YAML config actually works...
    MultiLayerConfiguration conf = new NeuralNetConfiguration.Builder().learningRate(0.1).list().layer(0, new DenseLayer.Builder().nIn(10).nOut(10).build()).layer(1, new CustomLayer(3.14159)).layer(2, new OutputLayer.Builder(LossFunctions.LossFunction.MCXENT).nIn(10).nOut(10).build()).pretrain(false).backprop(true).build();
    String json = conf.toJson();
    String yaml = conf.toYaml();
    System.out.println(json);
    MultiLayerConfiguration confFromJson = MultiLayerConfiguration.fromJson(json);
    assertEquals(conf, confFromJson);
    MultiLayerConfiguration confFromYaml = MultiLayerConfiguration.fromYaml(yaml);
    assertEquals(conf, confFromYaml);
}

Example 8 with ObjectMapper

use of org.nd4j.shade.jackson.databind.ObjectMapper in project deeplearning4j by deeplearning4j.

the class SequenceElement method mapper.

public static ObjectMapper mapper() {
    /*
              DO NOT ENABLE INDENT_OUTPUT FEATURE
              we need THIS json to be single-line
          */
    ObjectMapper ret = new ObjectMapper();
    ret.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
    ret.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
    ret.configure(MapperFeature.SORT_PROPERTIES_ALPHABETICALLY, true);
    return ret;
}

Example 9 with ObjectMapper

use of org.nd4j.shade.jackson.databind.ObjectMapper in project deeplearning4j by deeplearning4j.

the class VocabularyWord method mapper.

private static ObjectMapper mapper() {
    if (mapper == null) {
        synchronized (lock) {
            if (mapper == null) {
                mapper = new ObjectMapper();
                mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
                mapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
                mapper.configure(MapperFeature.SORT_PROPERTIES_ALPHABETICALLY, true);
                return mapper;
            }
        }
    }
    return mapper;
}

Example 10 with ObjectMapper

use of org.nd4j.shade.jackson.databind.ObjectMapper in project deeplearning4j by deeplearning4j.

the class KerasModel method parseYamlString.

/**
     * Convenience function for parsing JSON strings.
     *
     * @param json    String containing valid JSON
     * @return        Nested (key,value) map of arbitrary depth
     * @throws IOException
     */
public static Map<String, Object> parseYamlString(String json) throws IOException {
    ObjectMapper mapper = new ObjectMapper(new YAMLFactory());
    TypeReference<HashMap<String, Object>> typeRef = new TypeReference<HashMap<String, Object>>() {
    };
    return mapper.readValue(json, typeRef);
}