io.datarouter.gson.serialization.GsonReflectionTool Maven / Gradle / Ivy
/*
* Copyright © 2009 HotPads ([email protected])
*
* 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 io.datarouter.gson.serialization;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import io.datarouter.gson.Java9;
public class GsonReflectionTool{
private static Set> getAllSuperClassesAndInterfaces(Class cls){
Set> supersAndInterfaces = new LinkedHashSet<>();
for(Class interfaceClass : cls.getInterfaces()){
supersAndInterfaces.add(interfaceClass);
supersAndInterfaces.addAll(getAllSuperClassesAndInterfaces(interfaceClass));
}
Class superclass = cls.getSuperclass();
if(superclass != null){
supersAndInterfaces.add(superclass);
supersAndInterfaces.addAll(getAllSuperClassesAndInterfaces(superclass));
}
return supersAndInterfaces;
}
/**
* This will return a list of all the fields declared in the super types of YourClass. It will NOT include
* the declared fields in YourClass.
* @param clazz class from which the field list will be extracted.
* @return a list of the inherited declared Fields not including any declared field from YourClass.
*/
private static List getDeclaredFieldsFromAncestors(Class clazz){
List fields = new ArrayList<>();
for(Class cls : getAllSuperClassesAndInterfaces(clazz)){
for(Field field : cls.getDeclaredFields()){
fields.add(field);
}
}
return fields;
}
/**
* This will return a list of all the fields declared in the given class and in its super types.
* @param clazz class from which the field list will be extracted.
* @return a list of the inherited declared Fields not including any declared field from YourClass.
*/
public static List getDeclaredFieldsIncludingAncestors(Class clazz){
List fields = new ArrayList<>();
fields.addAll(getDeclaredFields(clazz));
fields.addAll(getDeclaredFieldsFromAncestors(clazz));
return fields;
}
/**
* This is a wrapper for Class.getDeclaredFields().
* @param cls class from which the field list will be extracted.
* @return a list of the declared Fields not including any inherited field.
*/
private static List getDeclaredFields(Class cls){
return Java9.listOf(cls.getDeclaredFields());
}
}