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.
17 package org.openecomp.sdc.externalupload.utils;
19 import com.fasterxml.jackson.databind.ObjectMapper;
20 import com.google.common.collect.ImmutableSet;
21 import org.apache.commons.beanutils.BeanUtils;
23 import java.lang.reflect.Field;
24 import java.util.ArrayList;
25 import java.util.Arrays;
26 import java.util.HashSet;
27 import java.util.List;
29 import java.util.Objects;
30 import java.util.Optional;
33 public class ServiceUtils {
35 private static ImmutableSet<Class> collectionClasses = ImmutableSet.of(Map.class, List.class, Set.class);
36 private static ImmutableSet<Class> primitiveTypesClasses = ImmutableSet.of(String.class, Integer.class, Double.class, Float.class);
38 private ServiceUtils() {}
40 public static <T> Optional<T> createObjectUsingSetters(Object objectCandidate,
41 Class<T> classToCreate)
43 if (Objects.isNull(objectCandidate)) {
44 return Optional.empty();
47 Map<String, Object> objectAsMap = getObjectAsMap(objectCandidate);
48 T result = classToCreate.newInstance();
50 List<Field> declaredFields = getAllFields(classToCreate);
51 for( Field field : declaredFields){
52 if(isComplexClass(field)){
53 Optional<?> objectUsingSetters =
54 createObjectUsingSetters(objectAsMap.get(field.getName()), field.getType());
55 if( objectUsingSetters.isPresent()){
56 objectAsMap.remove(field.getName());
57 objectAsMap.put(field.getName(), objectUsingSetters.get());
61 BeanUtils.populate(result, objectAsMap);
63 return Optional.of(result);
66 private static <T> List<Field> getAllFields(Class<T> clazz) {
67 List<Field> fields = new ArrayList<>();
68 for(Class<?> c = clazz; c != null; c = c.getSuperclass()) {
69 fields.addAll(Arrays.asList(c.getDeclaredFields()));
75 private static boolean isComplexClass(Field field) {
76 return !isCollectionClass(field)
77 && !isPrimitiveClass(field)
78 && !field.getType().equals(Object.class);
81 private static boolean isCollectionClass(Field field) {
82 return collectionClasses.contains(field.getType());
85 private static boolean isPrimitiveClass(Field field) {
86 return primitiveTypesClasses.contains(field.getType());
89 public static Map<String, Object> getObjectAsMap(Object obj) {
90 return new ObjectMapper().convertValue(obj, Map.class);
93 public static Set<String> getClassFieldNames(Class<? extends Object> classType) {
94 Set<String> fieldNames = new HashSet<>();
95 List<Field> allFields = getAllFields(classType);
96 allFields.forEach(field -> fieldNames.add(field.getName()));