pollymc/libraries/launcher/org/multimc/Utils.java

/*
 * Copyright 2012-2017 MultiMC Contributors
 *
 * 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.multimc;

import java.io.*;
import java.io.File;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.net.URL;
import java.net.URLClassLoader;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.*;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

public class Utils
{
	/**
	 * Combine two parts of a path.
	 *
	 * @param path1
	 * @param path2
	 * @return the paths, combined
	 */
	public static String combine(String path1, String path2)
	{
		File file1 = new File(path1);
		File file2 = new File(file1, path2);
		return file2.getPath();
	}

	/**
	 * Join a list of strings into a string using a separator!
	 *
	 * @param strings   the string list to join
	 * @param separator the glue
	 * @return the result.
	 */
	public static String join(List<String> strings, String separator)
	{
		StringBuilder sb = new StringBuilder();
		String sep = "";
		for (String s : strings)
		{
			sb.append(sep).append(s);
			sep = separator;
		}
		return sb.toString();
	}

	/**
	 * Finds a field that looks like a Minecraft base folder in a supplied class
	 *
	 * @param mc the class to scan
	 */
	public static Field getMCPathField(Class<?> mc)
	{
		Field[] fields = mc.getDeclaredFields();

		for (Field f : fields)
		{
			if (f.getType() != File.class)
			{
				// Has to be File
				continue;
			}
			if (f.getModifiers() != (Modifier.PRIVATE + Modifier.STATIC))
			{
				// And Private Static.
				continue;
			}
			return f;
		}
		return null;
	}

	/**
	 * Log to the MultiMC console
	 *
	 * @param message A String containing the message
	 * @param level   A String containing the level name. See MinecraftLauncher::getLevel()
	 */
	public static void log(String message, String level)
	{
		// Kinda dirty
		String tag = "!![" + level + "]!";
		System.out.println(tag + message.replace("\n", "\n" + tag));
	}

	public static void log(String message)
	{
		log(message, "MultiMC");
	}

	public static void log()
	{
		System.out.println();
	}
}