1 files changed, 23 insertions, 5 deletions
diff --git a/src/main/kotlin/pl/treksoft/kvision/form/Form.kt b/src/main/kotlin/pl/treksoft/kvision/form/Form.kt
index 18acdf9f..b1e08606 100644
--- a/src/main/kotlin/pl/treksoft/kvision/form/Form.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/form/Form.kt
@@ -42,6 +42,24 @@ internal data class FieldParams<in F : FormControl>(
 )
 
 /**
+ * A wrapper for a Map with a custom containsKey method implementation.
+ * Used with kotlinx.serialization Mapper.
+ */
+private class FormMapWrapper<out V>(private val map: Map<String, V>) : Map<String, V> {
+    override fun equals(other: Any?): Boolean = map == other
+    override fun hashCode(): Int = map.hashCode()
+    override fun toString(): String = map.toString()
+    override val size: Int get() = map.size
+    override fun isEmpty(): Boolean = map.isEmpty()
+    override fun containsKey(key: String): Boolean = if (key.indexOf('.') != -1) map.containsKey(key) else !(map.containsKey("$key.time") || map.containsKey("$key.size"))
+    override fun containsValue(value: @UnsafeVariance V): Boolean = map.containsValue(value)
+    override fun get(key: String): V? = map[key]
+    override val keys: Set<String> get() = map.keys
+    override val values: Collection<V> get() = map.values
+    override val entries: Set<Map.Entry<String, V>> get() = map.entries
+}
+
+/**
  * The form definition class. Can be used directly or indirectly inside a [FormPanel].
  *
  * @constructor Creates a form with a given modelFactory function
@@ -67,9 +85,9 @@ class Form<K : Any>(private val panel: FormPanel<K>? = null, private val seriali
                     }
                     is List<*> -> {
                         @Suppress("UNCHECKED_CAST")
-                        (entry.value as? List<KFile>)?.let {
-                            listOf(entry.key to entry.value, "${entry.key}.size" to it.size) +
-                                    it.mapIndexed { index, kFile ->
+                        (entry.value as? List<KFile>)?.let { list ->
+                            listOf(entry.key to entry.value, "${entry.key}.size" to list.size) +
+                                    list.mapIndexed { index, kFile ->
                                         listOf(
                                             "${entry.key}.${index + 1}.name" to kFile.name,
                                             "${entry.key}.${index + 1}.size" to kFile.size,
@@ -80,8 +98,8 @@ class Form<K : Any>(private val panel: FormPanel<K>? = null, private val seriali
                     }
                     else -> listOf(entry.key to entry.value)
                 }
-            }.toMap().withDefault { null }
-            val mapper = Mapper.InNullableMapper(map)
+            }.toMap()
+            val mapper = Mapper.InNullableMapper(FormMapWrapper(map))
             mapper.read(serializer)
         }
     }