3 * Copyright (c) 2017 Orange. All rights reserved.
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.
17 package org.onap.nbi.commons;
19 import java.math.BigDecimal;
20 import java.util.ArrayList;
21 import java.util.Arrays;
22 import java.util.Collection;
23 import java.util.LinkedHashSet;
24 import java.util.LinkedList;
25 import java.util.List;
28 import org.springframework.util.LinkedMultiValueMap;
29 import org.springframework.util.MultiValueMap;
30 import com.fasterxml.jackson.databind.JsonNode;
31 import com.fasterxml.jackson.databind.ObjectMapper;
32 import com.fasterxml.jackson.databind.node.ArrayNode;
33 import com.fasterxml.jackson.databind.node.ObjectNode;
35 public class JacksonFilter {
37 private final static List<String> SKIPPED_FIELDS = Arrays.asList("internalId");
40 public static <R> List<ObjectNode> createNodes(List<R> list, JsonRepresentation jsonRepresentation) {
44 set = new LinkedHashSet<>();
46 set = new LinkedHashSet<>(list);
48 return createNodes(set, jsonRepresentation);
51 public static <R> List<ObjectNode> createNodes(Collection<R> collection, JsonRepresentation jsonRepresentation) {
52 List<ObjectNode> nodeList = new ArrayList<>();
53 for (R element : collection) {
54 ObjectNode node = createNode(element, jsonRepresentation);
60 public static <R> ObjectNode createNode(R bean, JsonRepresentation jsonRepresentation) {
61 ObjectMapper mapper = new ObjectMapper();
62 return JacksonFilter.createNode(mapper, bean, jsonRepresentation.getAttributes());
65 private static <R> ObjectNode createNode(ObjectMapper mapper, R bean, Set<String> names) {
66 // split fieldNames in 2 categories :
67 // simpleFields for simple property names with no '.'
68 // nestedFields for nested property names with a '.'
69 Set<String> simpleFields = new LinkedHashSet<String>();
70 MultiValueMap nestedFields = new LinkedMultiValueMap();
71 buildFields(names, simpleFields, nestedFields);
73 // create a simple node with only one level containing all simples
75 ObjectNode rootNode = JacksonFilter.createNodeWithSimpleFields(mapper, bean, simpleFields);
77 // create nested nodes with deeper levels
78 Set<Map.Entry<String, List<String>>> entrySet = nestedFields.entrySet();
79 // for each nested value, create recursively a node
80 for (Map.Entry<String, List<String>> entry : entrySet) {
81 String rootFieldName = entry.getKey();
82 // add in current node only if full value is not already present in
84 if (!simpleFields.contains(rootFieldName)) {
85 Object nestedBean = BeanUtils.getNestedProperty(bean, rootFieldName);
86 // add only non null fields
87 if (nestedBean == null) {
90 Set<String> nestedFieldNames = new LinkedHashSet<String>(entry.getValue());
91 // current node is an array or a list
92 if ((nestedBean.getClass().isArray()) || (Collection.class.isAssignableFrom(nestedBean.getClass()))) {
93 handleListNode(mapper, rootNode, rootFieldName, nestedBean, nestedFieldNames);
95 // create recursively a node and add it in current root node
96 createNodeRecursively(mapper, rootNode, rootFieldName, nestedBean, nestedFieldNames);
103 private static void createNodeRecursively(ObjectMapper mapper, ObjectNode rootNode, String rootFieldName,
104 Object nestedBean, Set<String> nestedFieldNames) {
105 ObjectNode nestedNode = JacksonFilter.createNode(mapper, nestedBean, nestedFieldNames);
106 if ((nestedNode != null) && (nestedNode.size() > 0)) {
107 rootNode.set(rootFieldName, nestedNode);
111 private static void buildFields(Set<String> names, Set<String> simpleFields, MultiValueMap nestedFields) {
112 for (String name : names) {
113 int index = name.indexOf('.');
114 boolean isNestedField = (index > 0) && (index < name.length());
116 String rootFieldName = name.substring(0, index);
117 String subFieldName = name.substring(index + 1);
118 nestedFields.add(rootFieldName, subFieldName);
120 simpleFields.add(name);
125 private static void handleListNode(ObjectMapper mapper, ObjectNode rootNode, String rootFieldName,
126 Object nestedBean, Set<String> nestedFieldNames) {
127 Object[] array = null;
128 if ((nestedBean.getClass().isArray())) {
129 array = (Object[]) nestedBean;
131 Collection<?> collection = (Collection<?>) nestedBean;
132 array = collection.toArray();
134 if (array.length > 0) {
135 // create a node for each element in array
136 // and add created node in an arrayNode
137 Collection<JsonNode> nodes = new LinkedList<JsonNode>();
138 for (Object object : array) {
139 ObjectNode nestedNode = JacksonFilter.createNode(mapper, object, nestedFieldNames);
140 if ((nestedNode != null) && (nestedNode.size() > 0)) {
141 nodes.add(nestedNode);
144 ArrayNode arrayNode = mapper.createArrayNode();
145 arrayNode.addAll(nodes);
146 if (arrayNode.size() > 0) {
147 rootNode.set(rootFieldName, arrayNode);
152 private static <R> ObjectNode createNodeWithSimpleFields(ObjectMapper mapper, R bean, Set<String> names) {
153 ObjectNode node = mapper.createObjectNode();
154 for (String name : names) {
155 // Prevent getting value of some fields
156 if (SKIPPED_FIELDS.contains(name)) {
160 JacksonFilter.nodePut(node, name, BeanUtils.getNestedProperty(bean, name));
165 private static void nodePut(ObjectNode node, String name, Object value) {
166 if (value instanceof Boolean) {
167 node.put(name, (Boolean) value);
168 } else if (value instanceof Integer) {
169 node.put(name, (Integer) value);
170 } else if (value instanceof Long) {
171 node.put(name, (Long) value);
172 } else if (value instanceof Float) {
173 node.put(name, (Float) value);
174 } else if (value instanceof Double) {
175 node.put(name, (Double) value);
176 } else if (value instanceof BigDecimal) {
177 node.put(name, (BigDecimal) value);
178 } else if (value instanceof String) {
179 node.put(name, (String) value);
181 node.putPOJO(name, value);