2 * ================================================================================
3 * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 * ============LICENSE_END=========================================================
20 package org.onap.dcae.analytics.model.util.json;
22 import com.fasterxml.jackson.annotation.JsonInclude;
23 import com.fasterxml.jackson.databind.DeserializationFeature;
24 import com.fasterxml.jackson.databind.ObjectMapper;
25 import com.jayway.jsonpath.Configuration;
26 import com.jayway.jsonpath.Option;
27 import com.jayway.jsonpath.spi.json.JacksonJsonProvider;
28 import com.jayway.jsonpath.spi.json.JsonProvider;
29 import com.jayway.jsonpath.spi.mapper.JacksonMappingProvider;
30 import com.jayway.jsonpath.spi.mapper.MappingProvider;
32 import java.util.EnumSet;
34 import java.util.function.Supplier;
36 import org.onap.dcae.analytics.model.util.json.module.CommonEventFormatModule;
37 import org.onap.dcae.analytics.model.util.json.module.ConfigBindingServiceModule;
38 import org.onap.dcae.analytics.model.util.json.module.DynamicPropertiesModule;
41 * Base Object mapper supplies Jackson {@link ObjectMapper} that specializes in serialize and deserialize -
42 * Analytics model objects. Various analytics components should inherit from this supplier and register
43 * their custom modules
45 * @author Rajiv Singla
47 public abstract class BaseObjectMapperSupplier implements Supplier<ObjectMapper> {
50 * Class that can used to configure Json Path configuration
52 public static class JsonPathConfiguration implements Configuration.Defaults {
54 private final JsonProvider jsonProvider;
55 private final MappingProvider mappingProvider;
56 private final Set<Option> options;
58 private JsonPathConfiguration(final ObjectMapper objectMapper, final Set<Option> options) {
59 jsonProvider = new JacksonJsonProvider(objectMapper);
60 mappingProvider = new JacksonMappingProvider(objectMapper);
61 this.options = options;
66 public JsonProvider jsonProvider() {
71 public Set<Option> options() {
76 public MappingProvider mappingProvider() {
77 return mappingProvider;
81 public abstract void registerCustomModules(final ObjectMapper objectMapper);
84 public ObjectMapper get() {
86 final ObjectMapper objectMapper = new ObjectMapper();
88 // Ignore null values during serialization. Null values will not be included in serialized JSON object
89 objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
90 // Don't fail on unknown properties
91 objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
93 // register dynamic properties module
94 objectMapper.registerModule(new DynamicPropertiesModule());
95 // register config binding service module
96 objectMapper.registerModule(new ConfigBindingServiceModule());
97 // register common event format module
98 objectMapper.registerModule(new CommonEventFormatModule());
100 // register custom modules
101 registerCustomModules(objectMapper);
103 // Setup JsonPath default config
104 setupJsonPathDefaultConfig(objectMapper);
110 * Setups up default Config for Json Path
112 * @param objectMapper Jackson object mapper
114 private void setupJsonPathDefaultConfig(final ObjectMapper objectMapper) {
116 Configuration.setDefaults(new JsonPathConfiguration(objectMapper, EnumSet.of(
117 Option.DEFAULT_PATH_LEAF_TO_NULL, // missing properties are tolerated
118 Option.SUPPRESS_EXCEPTIONS, // Json Path exceptions are suppressed
119 Option.ALWAYS_RETURN_LIST // always return results as list