class HashMapJsonAdapter<K, V>(
private val keyAdapter: JsonAdapter<K>,
private val valueAdapter: JsonAdapter<V>
) : JsonAdapter<HashMap<K, V>>() {
@Throws(IOException::class)
override fun toJson(writer: JsonWriter, map: HashMap<K, V>?) {
writer.beginObject()
for ((key, value) in map ?: emptyMap<K, V>()) {
if (key == null) {
throw JsonDataException("Map key is null at ${writer.path}")
}
keyAdapter.toJson(writer, key)
valueAdapter.toJson(writer, value)
}
writer.endObject()
}
@Throws(IOException::class)
override fun fromJson(reader: JsonReader): HashMap<K, V>? {
val result = linkedMapOf<K, V>()
reader.beginObject()
while (reader.hasNext()) {
val name = keyAdapter.fromJson(reader)
val value = valueAdapter.fromJson(reader)
val replaced = result.put(name!!, value!!)
if (replaced != null) {
throw JsonDataException("Map key '$name' has multiple values at path ${reader.path} : $replaced and value")
}
}
reader.endObject()
return result
}
override fun toString(): String = "JsonAdapter($keyAdapter=$valueAdapter)"
companion object
}