BungeeCore/Persistent/src/de/steamwar/persistent/Reflection.java

/*
 *   This file is a part of the SteamWar software.
 *
 *   Copyright (C) 2024  SteamWar.de-Serverteam
 *
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU Affero General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *   GNU Affero General Public License for more details.
 *
 *   You should have received a copy of the GNU Affero General Public License
 *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

package de.steamwar.persistent;

import lombok.experimental.UtilityClass;

@UtilityClass
public class Reflection {
    public static class Field<C, T> {
        private final java.lang.reflect.Field f;

        public Field(Class<C> target, String name) {
            try {
                f = target.getDeclaredField(name);
                f.setAccessible(true);
            } catch (NoSuchFieldException e) {
                throw new IllegalArgumentException("Cannot find field with name " + name, e);
            }
        }

        public T get(C target) {
            try {
                return (T) f.get(target);
            } catch (IllegalAccessException e) {
                throw new IllegalArgumentException("Cannot access reflection.", e);
            }
        }

        public void set(C target, T value) {
            try {
                f.set(target, value);
            } catch (IllegalAccessException e) {
                throw new IllegalArgumentException("Cannot access reflection.", e);
            }
        }
    }

    public static class Method<C> {
        private final java.lang.reflect.Method m;

        public Method(Class<C> clazz, String methodName, Class<?>... params) {
            try {
                m = clazz.getDeclaredMethod(methodName, params);
                m.setAccessible(true);
            } catch (NoSuchMethodException e) {
                throw new IllegalArgumentException("Cannot find method with name " + methodName, e);
            }
        }

        public Object invoke(C target, Object... arguments) {
            try {
                return m.invoke(target, arguments);
            } catch (Exception e) {
                throw new IllegalArgumentException("Cannot invoke method " + m, e);
            }
        }
    }
}