2 * Copyright © 2016-2018 European Support Limited
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.
16 package org.openecomp.sdc.externalupload.utils;
18 import com.fasterxml.jackson.databind.ObjectMapper;
19 import com.google.common.collect.ImmutableSet;
20 import java.lang.reflect.Field;
21 import java.util.ArrayList;
22 import java.util.Arrays;
23 import java.util.HashSet;
24 import java.util.List;
26 import java.util.Objects;
27 import java.util.Optional;
29 import org.apache.commons.beanutils.BeanUtils;
31 public class ServiceUtils {
33 private static ImmutableSet<Class> collectionClasses = ImmutableSet.of(Map.class, List.class, Set.class);
34 private static ImmutableSet<Class> primitiveTypesClasses = ImmutableSet.of(String.class, Integer.class, Double.class, Float.class);
36 private ServiceUtils() {
39 public static <T> Optional<T> createObjectUsingSetters(Object objectCandidate, Class<T> classToCreate) throws Exception {
40 if (Objects.isNull(objectCandidate)) {
41 return Optional.empty();
43 Map<String, Object> objectAsMap = getObjectAsMap(objectCandidate);
44 T result = classToCreate.newInstance();
45 List<Field> declaredFields = getAllFields(classToCreate);
46 for (Field field : declaredFields) {
47 if (isComplexClass(field)) {
48 Optional<?> objectUsingSetters = createObjectUsingSetters(objectAsMap.get(field.getName()), field.getType());
49 if (objectUsingSetters.isPresent()) {
50 objectAsMap.remove(field.getName());
51 objectAsMap.put(field.getName(), objectUsingSetters.get());
55 BeanUtils.populate(result, objectAsMap);
56 return Optional.of(result);
59 private static <T> List<Field> getAllFields(Class<T> clazz) {
60 List<Field> fields = new ArrayList<>();
61 for (Class<?> c = clazz; c != null; c = c.getSuperclass()) {
62 fields.addAll(Arrays.asList(c.getDeclaredFields()));
67 private static boolean isComplexClass(Field field) {
68 return !isCollectionClass(field) && !isPrimitiveClass(field) && !field.getType().equals(Object.class);
71 private static boolean isCollectionClass(Field field) {
72 return collectionClasses.contains(field.getType());
75 private static boolean isPrimitiveClass(Field field) {
76 return primitiveTypesClasses.contains(field.getType());
79 public static Map<String, Object> getObjectAsMap(Object obj) {
80 return new ObjectMapper().convertValue(obj, Map.class);
83 public static Set<String> getClassFieldNames(Class<? extends Object> classType) {
84 Set<String> fieldNames = new HashSet<>();
85 List<Field> allFields = getAllFields(classType);
86 allFields.forEach(field -> fieldNames.add(field.getName()));