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/*
* Copyright © 2016-2018 European Support Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.openecomp.sdc.externalupload.utils;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.collect.ImmutableSet;
import org.apache.commons.beanutils.BeanUtils;
import java.lang.reflect.Field;
import java.util.*;
public class ServiceUtils {
private static ImmutableSet<Class> collectionClasses = ImmutableSet.of(Map.class, List.class, Set.class);
private static ImmutableSet<Class> primitiveTypesClasses = ImmutableSet.of(String.class, Integer.class, Double.class, Float.class);
private ServiceUtils() {}
public static <T> Optional<T> createObjectUsingSetters(Object objectCandidate,
Class<T> classToCreate)
throws Exception {
if (Objects.isNull(objectCandidate)) {
return Optional.empty();
}
Map<String, Object> objectAsMap = getObjectAsMap(objectCandidate);
T result = classToCreate.newInstance();
List<Field> declaredFields = getAllFields(classToCreate);
for( Field field : declaredFields){
if(isComplexClass(field)){
Optional<?> objectUsingSetters =
createObjectUsingSetters(objectAsMap.get(field.getName()), field.getType());
if( objectUsingSetters.isPresent()){
objectAsMap.remove(field.getName());
objectAsMap.put(field.getName(), objectUsingSetters.get());
}
}
}
BeanUtils.populate(result, objectAsMap);
return Optional.of(result);
}
private static <T> List<Field> getAllFields(Class<T> clazz) {
List<Field> fields = new ArrayList<>();
for(Class<?> c = clazz; c != null; c = c.getSuperclass()) {
fields.addAll(Arrays.asList(c.getDeclaredFields()));
}
return fields;
}
private static boolean isComplexClass(Field field) {
return !isCollectionClass(field)
&& !isPrimitiveClass(field)
&& !field.getType().equals(Object.class);
}
private static boolean isCollectionClass(Field field) {
return collectionClasses.contains(field.getType());
}
private static boolean isPrimitiveClass(Field field) {
return primitiveTypesClasses.contains(field.getType());
}
public static Map<String, Object> getObjectAsMap(Object obj) {
return new ObjectMapper().convertValue(obj, Map.class);
}
public static Set<String> getClassFieldNames(Class<? extends Object> classType) {
Set<String> fieldNames = new HashSet<>();
List<Field> allFields = getAllFields(classType);
allFields.forEach(field -> fieldNames.add(field.getName()));
return fieldNames;
}
}
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