org.deeplearning4j.nn.conf.serde.JsonMappers Maven / Gradle / Ivy
/*
* ******************************************************************************
* *
* *
* * This program and the accompanying materials are made available under the
* * terms of the Apache License, Version 2.0 which is available at
* * https://www.apache.org/licenses/LICENSE-2.0.
* *
* * See the NOTICE file distributed with this work for additional
* * information regarding copyright ownership.
* * Unless required by applicable law or agreed to in writing, software
* * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* * License for the specific language governing permissions and limitations
* * under the License.
* *
* * SPDX-License-Identifier: Apache-2.0
* *****************************************************************************
*/
package org.deeplearning4j.nn.conf.serde;
import lombok.extern.slf4j.Slf4j;
import org.deeplearning4j.nn.conf.ComputationGraphConfiguration;
import org.deeplearning4j.nn.conf.MultiLayerConfiguration;
import org.deeplearning4j.nn.conf.serde.legacy.LegacyJsonFormat;
import org.nd4j.shade.jackson.annotation.JsonTypeInfo;
import org.nd4j.shade.jackson.databind.*;
import org.nd4j.shade.jackson.databind.cfg.MapperConfig;
import org.nd4j.shade.jackson.databind.deser.BeanDeserializerModifier;
import org.nd4j.shade.jackson.databind.introspect.Annotated;
import org.nd4j.shade.jackson.databind.introspect.AnnotatedClass;
import org.nd4j.shade.jackson.databind.introspect.AnnotationMap;
import org.nd4j.shade.jackson.databind.introspect.JacksonAnnotationIntrospector;
import org.nd4j.shade.jackson.databind.jsontype.TypeResolverBuilder;
import org.nd4j.shade.jackson.databind.module.SimpleModule;
import org.nd4j.shade.jackson.dataformat.yaml.YAMLFactory;
@Slf4j
public class JsonMappers {
private static ObjectMapper jsonMapper = new ObjectMapper();
private static ObjectMapper yamlMapper = new ObjectMapper(new YAMLFactory());
private static ObjectMapper legacyMapper;
static {
configureMapper(jsonMapper);
configureMapper(yamlMapper);
}
/**
* @return The default/primary ObjectMapper for deserializing JSON network configurations in DL4J
*/
public static ObjectMapper getMapper(){
return jsonMapper;
}
public static synchronized ObjectMapper getLegacyMapper(){
if(legacyMapper == null){
legacyMapper = LegacyJsonFormat.getMapper100alpha();
configureMapper(legacyMapper);
}
return legacyMapper;
}
/**
* @return The default/primary ObjectMapper for deserializing network configurations in DL4J (YAML format)
*/
public static ObjectMapper getMapperYaml() {
return yamlMapper;
}
private static void configureMapper(ObjectMapper ret) {
ret.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
ret.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
ret.configure(MapperFeature.SORT_PROPERTIES_ALPHABETICALLY, true);
ret.enable(SerializationFeature.INDENT_OUTPUT);
SimpleModule customDeserializerModule = new SimpleModule();
customDeserializerModule.setDeserializerModifier(new BeanDeserializerModifier() {
@Override
public JsonDeserializer modifyDeserializer(DeserializationConfig config, BeanDescription beanDesc,
JsonDeserializer deserializer) {
//Use our custom deserializers to handle backward compatibility for updaters -> IUpdater
if (beanDesc.getBeanClass() == MultiLayerConfiguration.class) {
return new MultiLayerConfigurationDeserializer(deserializer);
} else if (beanDesc.getBeanClass() == ComputationGraphConfiguration.class) {
return new ComputationGraphConfigurationDeserializer(deserializer);
}
return deserializer;
}
});
ret.registerModule(customDeserializerModule);
}
}