| // Copyright (C) 2021 The Android Open Source Project |
| // |
| // 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 com.googlesource.gerrit.plugins.task; |
| |
| import com.google.common.primitives.Primitives; |
| import java.lang.reflect.Field; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| public class Copier { |
| protected static <T> void deepCopyDeclaredFields( |
| Class<T> cls, |
| T from, |
| T to, |
| boolean includeInaccessible, |
| Collection<Class<?>> copyReferenceOnly) { |
| for (Field field : cls.getDeclaredFields()) { |
| try { |
| if (includeInaccessible) { |
| field.setAccessible(true); |
| } |
| Class<?> fieldCls = field.getType(); |
| Object val = field.get(from); |
| if (field.getType().isPrimitive() |
| || Primitives.isWrapperType(fieldCls) |
| || (val instanceof String) |
| || val == null |
| || copyReferenceOnly.contains(fieldCls)) { |
| field.set(to, val); |
| } else if (val instanceof List) { |
| List<?> list = List.class.cast(val); |
| field.set(to, new ArrayList<>(list)); |
| } else if (val instanceof Map) { |
| Map<?, ?> map = Map.class.cast(val); |
| field.set(to, new HashMap<>(map)); |
| } else if (field.getName().equals("this$0")) { // Can't copy internal final field |
| } else { |
| throw new RuntimeException( |
| "Don't know how to deep copy " + fieldValueToString(field, val)); |
| } |
| } catch (IllegalAccessException e) { |
| if (includeInaccessible) { |
| throw new RuntimeException( |
| "Cannot access field to copy it " + fieldValueToString(field, "unknown")); |
| } |
| } |
| } |
| } |
| |
| protected static String fieldValueToString(Field field, Object val) { |
| return "field:" + field.getName() + " value:" + val + " type:" + field.getType(); |
| } |
| } |