Proguard Reflection Mapper

package com;

import com.google.gson.GsonBuilder;
import com.google.gson.reflect.TypeToken;

import java.io.*;
import java.util.HashMap;
import java.util.Map;

/**
 * @author Daniel
 */
public final class ReflectionMapper {

    private final File txt = new File("./Mapping.txt");

    //TODO: GZIP
    private final File json = new File("./Mapping.json");

    //TODO: Sort entries by name
    private final Map<String, ObfuscatedClass> map = new HashMap<String, ObfuscatedClass>();

    private ReflectionMapper() {
        map.clear();
        mapChildren();
        write();
    }

    public static void initialize() {
        new ReflectionMapper();
    }

    private void mapChildren() {
        try {
            BufferedReader reader = new BufferedReader(new FileReader(txt));
            String line;

            String regular = "";
            String obfuscated;

            while ((line = reader.readLine()) != null) {
                String[] split = line.split(" -> ");
                if (line.startsWith("    ")) {
                    String original = split[0].trim().split(" ")[1];
                    if (original.contains("(")) {
                        original = original.substring(0, original.indexOf("("));
                    }
                    map.get(regular).put(original, split[1]);
                } else {
                    regular = split[0];
                    obfuscated = split[1].substring(0, split[1].length() - 1);
                    if (!map.containsKey(regular)) {
                        map.put(regular, new ObfuscatedClass(obfuscated));
                    }
                }
            }
            reader.close();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    private void write() {
        try {
            BufferedWriter writer = new BufferedWriter(new FileWriter(json));
            writer.write(new GsonBuilder().setPrettyPrinting().create().toJson(map, new TypeToken<Map<String, ObfuscatedClass>>() {}.getType()));
            writer.newLine();
            writer.flush();
            writer.close();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

}

package com;

import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;

/**
 * @author Daniel
 */
public class ObfuscatedClass implements Serializable {

    private final String name;

    //TODO: Sort entries by name
    private final Map<String, String> map;

    public ObfuscatedClass(String name) {
        this.name = name;
        this.map = new HashMap<>();
    }

    public String getName() {
        return name;
    }

    public String get(String value) {
        return map.get(value);
    }

    public void put(String original, String modified) {
        map.put(original, modified);
    }

}