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Serialization lib for item configurations for minecraft forge.
There is a newer version: 1.20.1-0.2.7-neoforge
package io.github.hornster.itemfig.serialization;

import com.google.common.collect.ImmutableMap;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;

import java.lang.reflect.Field;
import java.util.LinkedHashMap;
import java.util.Map;

public class SerializationHelper {
    public static void addProperty(Field field, JsonObject jsonObject, Object src) throws IllegalAccessException, Exception{
        var fieldType = field.getType();
        var wasAccessible = field.canAccess(src);
        field.setAccessible(true);
        if (fieldType.equals(Character.class)) {
            jsonObject.addProperty(field.getName(), (Character) field.get(src));
        }
        else if (fieldType.equals(Integer.class)) {
            jsonObject.addProperty(field.getName(), (Integer)field.get(src));
        }
        else if (fieldType.equals(Short.class)) {
            jsonObject.addProperty(field.getName(), (Short)field.get(src));
        }
        else if (fieldType.equals(Float.class)) {
            jsonObject.addProperty(field.getName(), (Float)field.get(src));
        }
        else if (fieldType.equals(Double.class)) {
            jsonObject.addProperty(field.getName(), (Double)field.get(src));
        }
        else if (fieldType.equals(String.class)) {
            jsonObject.addProperty(field.getName(), (String)field.get(src));
        }
        else if (fieldType.equals(Long.class)) {
            jsonObject.addProperty(field.getName(), (Long)field.get(src));
        }
        else if (fieldType.equals(Boolean.class)) {
            jsonObject.addProperty(field.getName(), (Boolean)field.get(src));
        }
        else{
            if(!wasAccessible){
                field.setAccessible(false);
            }
            throw new Exception("Unknown field type during serialization: " + fieldType.getTypeName());
        }
        if(!wasAccessible){
            field.setAccessible(false);
        }
    }

    public static void readProperty(Field field, JsonObject jsonObject, Object dest) throws Exception {
        var fieldType = field.getType();
        var jsonFieldElement = jsonObject.get(field.getName());

        if(jsonFieldElement == null){
            //TODO Add LOGGER WARN/INFO
            //We ignore simply non-existent fields in config. They will get their default values.
            return;
        }
        if(!jsonFieldElement.isJsonPrimitive()){
            throw new Exception("Objects as config fields are not supported at the moment!");
        }
        var jsonFieldVal = jsonFieldElement.getAsJsonPrimitive();
        var wasAccessible = field.canAccess(dest);

        field.setAccessible(true);

        if (fieldType.equals(Character.class)) {
            var val = jsonFieldVal.getAsString();
            if(val != null){
                field.set(dest, val.charAt(0));
            }
        }
        else if (fieldType.equals(Integer.class)) {
            field.set(dest, jsonFieldVal.getAsInt());
        }
        else if (fieldType.equals(Short.class)) {
            field.set(dest, jsonFieldVal.getAsShort());
        }
        else if (fieldType.equals(Float.class)) {
            var val = jsonFieldVal.getAsFloat();
            field.set(dest, val);
        }
        else if (fieldType.equals(Double.class)) {
            field.set(dest, jsonFieldVal.getAsDouble());
        }
        else if (fieldType.equals(String.class)) {
            field.set(dest, jsonFieldVal.getAsString());
        }
        else if (fieldType.equals(Long.class)) {
            field.set(dest, jsonFieldVal.getAsLong());
        }
        else if (fieldType.equals(Boolean.class)) {
            field.set(dest, jsonFieldVal.getAsBoolean());
        }
        else{
            if(!wasAccessible){
                field.setAccessible(false);
            }
            throw new Exception("Unknown field type during serialization: " + fieldType.getTypeName());
        }
        if(!wasAccessible){
            field.setAccessible(false);
        }

    }
    /**Method for compat with GSON 2.8.9 since MC hates 2.10.1 apparently.*/
    public static Map getAsMap(JsonObject jsonObject){
        var map = new LinkedHashMap();

        var entries = jsonObject.entrySet();
        for(var entry : entries){
            map.put(entry.getKey(), entry.getValue());
        }

        return map;
    }
}