GsonEx.kt

import com.google.gson.Gson
import com.google.gson.JsonSyntaxException
import java.io.BufferedReader
import java.io.File
import java.io.FileReader
import java.io.IOException

class GsonEx {
    companion object {

        inline fun <reified T> File.readModelFromFile(): T? {
            var bufferReader: BufferedReader? = null
            return try {
                bufferReader = BufferedReader(FileReader(this))
                Gson().fromJson(bufferReader, T::class.java)
            } catch (e: IOException) {
                e.printStackTrace()
                null
            } catch (e: JsonSyntaxException) {
                e.printStackTrace()
                null
            } finally {
                bufferReader?.close()
            }
        }

        fun <T> T.writeModelToFile(file: File): Boolean {
            return try {
                val jsonString = Gson().toJson(this)
                file.writeText(jsonString)
                true
            } catch (e: IOException) {
                e.printStackTrace()
                false
            }
        }
    }
}