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

87 lines
2.2 KiB
Java

/*
* Copyright 2012-2021 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.File;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.List;
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;
}
}