2 * Copyright (c) 2018 Orange
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package org.onap.nbi.commons;
19 import com.fasterxml.jackson.databind.MappingJsonFactory;
20 import java.math.BigDecimal;
21 import java.util.ArrayList;
22 import java.util.Arrays;
23 import java.util.Collection;
24 import java.util.LinkedHashSet;
25 import java.util.LinkedList;
26 import java.util.List;
29 import org.springframework.util.LinkedMultiValueMap;
30 import org.springframework.util.MultiValueMap;
31 import com.fasterxml.jackson.databind.JsonNode;
32 import com.fasterxml.jackson.databind.ObjectMapper;
33 import com.fasterxml.jackson.databind.node.ArrayNode;
34 import com.fasterxml.jackson.databind.node.ObjectNode;
36 public class JacksonFilter {
38 private static final List<String> SKIPPED_FIELDS = Arrays.asList("internalId");
40 private JacksonFilter() {
43 public static <R> List<ObjectNode> createNodes(List<R> list, JsonRepresentation jsonRepresentation) {
47 set = new LinkedHashSet<>();
49 set = new LinkedHashSet<>(list);
51 return createNodes(set, jsonRepresentation);
54 public static <R> List<ObjectNode> createNodes(Collection<R> collection, JsonRepresentation jsonRepresentation) {
55 List<ObjectNode> nodeList = new ArrayList<>();
56 for (R element : collection) {
57 ObjectNode node = createNode(element, jsonRepresentation);
63 public static <R> ObjectNode createNode(R bean, JsonRepresentation jsonRepresentation) {
64 ObjectMapper mapper = new ObjectMapper(new MappingJsonFactory());
65 return JacksonFilter.createNode(mapper, bean, jsonRepresentation.getAttributes());
68 private static <R> ObjectNode createNode(ObjectMapper mapper, R bean, Set<String> names) {
69 // split fieldNames in 2 categories :
70 // simpleFields for simple property names with no '.'
71 // nestedFields for nested property names with a '.'
72 Set<String> simpleFields = new LinkedHashSet<>();
73 MultiValueMap nestedFields = new LinkedMultiValueMap();
74 buildFields(names, simpleFields, nestedFields);
76 // create a simple node with only one level containing all simples
78 ObjectNode rootNode = JacksonFilter.createNodeWithSimpleFields(mapper, bean, simpleFields);
80 // create nested nodes with deeper levels
81 Set<Map.Entry<String, List<String>>> entrySet = nestedFields.entrySet();
82 // for each nested value, create recursively a node
83 for (Map.Entry<String, List<String>> entry : entrySet) {
84 String rootFieldName = entry.getKey();
85 // add in current node only if full value is not already present in
87 if (!simpleFields.contains(rootFieldName)) {
88 Object nestedBean = BeanUtils.getNestedProperty(bean, rootFieldName);
89 // add only non null fields
90 if (nestedBean == null) {
93 Set<String> nestedFieldNames = new LinkedHashSet<>(entry.getValue());
94 // current node is an array or a list
95 if ((nestedBean.getClass().isArray()) || (Collection.class.isAssignableFrom(nestedBean.getClass()))) {
96 handleListNode(mapper, rootNode, rootFieldName, nestedBean, nestedFieldNames);
98 // create recursively a node and add it in current root node
99 createNodeRecursively(mapper, rootNode, rootFieldName, nestedBean, nestedFieldNames);
106 private static void createNodeRecursively(ObjectMapper mapper, ObjectNode rootNode, String rootFieldName,
107 Object nestedBean, Set<String> nestedFieldNames) {
108 ObjectNode nestedNode = JacksonFilter.createNode(mapper, nestedBean, nestedFieldNames);
109 if ((nestedNode != null) && (nestedNode.size() > 0)) {
110 rootNode.set(rootFieldName, nestedNode);
114 private static void buildFields(Set<String> names, Set<String> simpleFields, MultiValueMap nestedFields) {
115 for (String name : names) {
116 int index = name.indexOf('.');
117 boolean isNestedField = (index > 0) && (index < name.length());
119 String rootFieldName = name.substring(0, index);
120 String subFieldName = name.substring(index + 1);
121 nestedFields.add(rootFieldName, subFieldName);
123 simpleFields.add(name);
128 private static void handleListNode(ObjectMapper mapper, ObjectNode rootNode, String rootFieldName,
129 Object nestedBean, Set<String> nestedFieldNames) {
130 Object[] array = null;
131 if ((nestedBean.getClass().isArray())) {
132 array = (Object[]) nestedBean;
134 Collection<?> collection = (Collection<?>) nestedBean;
135 array = collection.toArray();
137 if (array.length > 0) {
138 // create a node for each element in array
139 // and add created node in an arrayNode
140 Collection<JsonNode> nodes = new LinkedList<>();
141 for (Object object : array) {
142 ObjectNode nestedNode = JacksonFilter.createNode(mapper, object, nestedFieldNames);
143 if ((nestedNode != null) && (nestedNode.size() > 0)) {
144 nodes.add(nestedNode);
147 ArrayNode arrayNode = mapper.createArrayNode();
148 arrayNode.addAll(nodes);
149 if (arrayNode.size() > 0) {
150 rootNode.set(rootFieldName, arrayNode);
155 private static <R> ObjectNode createNodeWithSimpleFields(ObjectMapper mapper, R bean, Set<String> names) {
156 ObjectNode node = mapper.createObjectNode();
157 for (String name : names) {
158 // Prevent getting value of some fields
159 if (SKIPPED_FIELDS.contains(name)) {
163 JacksonFilter.nodePut(node, name, BeanUtils.getNestedProperty(bean, name));
168 private static void nodePut(ObjectNode node, String name, Object value) {
169 if (value instanceof Boolean) {
170 node.put(name, (Boolean) value);
171 } else if (value instanceof Integer) {
172 node.put(name, (Integer) value);
173 } else if (value instanceof Long) {
174 node.put(name, (Long) value);
175 } else if (value instanceof Float) {
176 node.put(name, (Float) value);
177 } else if (value instanceof Double) {
178 node.put(name, (Double) value);
179 } else if (value instanceof BigDecimal) {
180 node.put(name, (BigDecimal) value);
181 } else if (value instanceof String) {
182 node.put(name, (String) value);
184 node.putPOJO(name, value);