84 Zeilen
2.9 KiB
Java
84 Zeilen
2.9 KiB
Java
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/*
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* This file is a part of the SteamWar software.
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*
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* Copyright (C) 2022 SteamWar.de-Serverteam
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package de.steamwar;
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import java.util.*;
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import java.util.function.Function;
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public class RandomGenerator {
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private static final Random random = new Random();
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private static final Map<Class<?>, Function<Class<?>, ?>> generators = new HashMap<>();
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static {
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generators.put(Integer.class, (clazz) -> random.nextInt());
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generators.put(int.class, (clazz) -> random.nextInt());
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generators.put(Double.class, (clazz) -> random.nextDouble());
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generators.put(double.class, (clazz) -> random.nextInt());
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generators.put(Boolean.class, (clazz) -> random.nextBoolean());
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generators.put(boolean.class, (clazz) -> random.nextBoolean());
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generators.put(Byte.class, (clazz) -> (byte) random.nextInt(127));
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generators.put(byte.class, (clazz) -> (byte) random.nextInt(127));
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generators.put(List.class, aClass -> {
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int length = random.nextInt(10);
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List<Object> list = new ArrayList<>();
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for (int i = 0; i < length; i++) {
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list.add(generators.get(Integer.class).apply(Integer.class));
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}
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return list;
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});
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generators.put(String.class, aClass -> {
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int length = random.nextInt(10);
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StringBuilder builder = new StringBuilder();
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for (int i = 0; i < length; i++) {
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builder.append(random.nextInt());
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}
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return builder.toString();
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});
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generators.put(Map.class, aClass -> {
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int length = random.nextInt(10);
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Map<Object, Object> map = new HashMap<>();
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for (int i = 0; i < length; i++) {
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map.put(generators.get(Integer.class).apply(Integer.class), generators.get(String.class).apply(String.class));
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}
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return map;
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});
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}
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public static <T> T generateRandom(Class<T> clazz) {
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if(clazz.isEnum()) {
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return generateRandomEnum(clazz);
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} else {
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return (T) generators.get(clazz).apply(clazz);
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}
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}
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public static <T> T generateRandomEnum(Class<T> clazz) {
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return clazz.getEnumConstants()[random.nextInt(clazz.getEnumConstants().length)];
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}
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}
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