Fix list in kotlin client templates (#18891)

* fix list in kotlin client templates

* remove java syntax in kotlin template

* fix array check

modules/openapi-generator/src/main/resources/kotlin-client/anyof_class.mustache

@@ -107,22 +107,20 @@ import java.io.IOException
                     {{^vendorExtensions.x-duplicated-data-type}}
                     // check if the actual instance is of the type `{{{dataType}}}`
                     if (value.actualInstance is {{#isArray}}List<*>{{/isArray}}{{^isArray}}{{{dataType}}}{{/isArray}}) {
-                    {{#isPrimitiveType}}
-                        val primitive = adapter{{#sanitizeGeneric}}{{{dataType}}}{{/sanitizeGeneric}}.toJsonTree(value.actualInstance as {{{dataType}}}?).getAsJsonPrimitive()
-                        elementAdapter.write(out, primitive)
-                        return
-                    {{/isPrimitiveType}}
-                    {{^isPrimitiveType}}
                     {{#isArray}}
-                        List<?> list = (List<?>) value.actualInstance
+                        val list = value.actualInstance as List<Any>
                         if (list.get(0) is {{{items.dataType}}}) {
                             val array = adapter{{#sanitizeGeneric}}{{{dataType}}}{{/sanitizeGeneric}}.toJsonTree(value.actualInstance as {{{dataType}}}?).getAsJsonArray()
                             elementAdapter.write(out, array)
                             return
                         }
                     {{/isArray}}
-                    {{/isPrimitiveType}}
                     {{^isArray}}
+                    {{#isPrimitiveType}}
+                        val primitive = adapter{{#sanitizeGeneric}}{{{dataType}}}{{/sanitizeGeneric}}.toJsonTree(value.actualInstance as {{{dataType}}}?).getAsJsonPrimitive()
+                        elementAdapter.write(out, primitive)
+                        return
+                    {{/isPrimitiveType}}
                     {{^isPrimitiveType}}
                         val element = adapter{{{dataType}}}.toJsonTree(value.actualInstance as {{{dataType}}}?)
                         elementAdapter.write(out, element)

modules/openapi-generator/src/main/resources/kotlin-client/data_class.mustache

@@ -246,10 +246,10 @@ import {{packageName}}.infrastructure.ITransformForStorage
             {{#required}}
             // ensure the json data is an array
             if (!jsonObj.get("{{{baseName}}}").isJsonArray) {
-              throw new IllegalArgumentException(String.format("Expected the field `{{{baseName}}}` to be an array in the JSON string but got `%s`", jsonObj["{{{baseName}}}"].toString()))
+              throw IllegalArgumentException(String.format("Expected the field `{{{baseName}}}` to be an array in the JSON string but got `%s`", jsonObj["{{{baseName}}}"].toString()))
             }
       
-            JsonArray jsonArray{{name}} = jsonObj.getAsJsonArray("{{{baseName}}}")
+            val jsonArray{{name}} = jsonObj.getAsJsonArray("{{{baseName}}}")
             // validate the required field `{{{baseName}}}` (array)
             for (i in 0 until jsonArray{{name}}.size()) {
               {{{items.dataType}}}.validateJsonElement(jsonArray{{name}}.get(i))

modules/openapi-generator/src/main/resources/kotlin-client/oneof_class.mustache

@@ -107,22 +107,20 @@ import java.io.IOException
                     {{^vendorExtensions.x-duplicated-data-type}}
                     // check if the actual instance is of the type `{{{dataType}}}`
                     if (value.actualInstance is {{#isArray}}List<*>{{/isArray}}{{^isArray}}{{{dataType}}}{{/isArray}}) {
-                    {{#isPrimitiveType}}
-                        val primitive = adapter{{#sanitizeGeneric}}{{{dataType}}}{{/sanitizeGeneric}}.toJsonTree(value.actualInstance as {{{dataType}}}?).getAsJsonPrimitive()
-                        elementAdapter.write(out, primitive)
-                        return
-                    {{/isPrimitiveType}}
-                    {{^isPrimitiveType}}
                     {{#isArray}}
-                        List<?> list = (List<?>) value.actualInstance
+                        val list = value.actualInstance as List<Any>
                         if (list.get(0) is {{{items.dataType}}}) {
                             val array = adapter{{#sanitizeGeneric}}{{{dataType}}}{{/sanitizeGeneric}}.toJsonTree(value.actualInstance as {{{dataType}}}?).getAsJsonArray()
                             elementAdapter.write(out, array)
                             return
                         }
                     {{/isArray}}
-                    {{/isPrimitiveType}}
                     {{^isArray}}
+                    {{#isPrimitiveType}}
+                        val primitive = adapter{{#sanitizeGeneric}}{{{dataType}}}{{/sanitizeGeneric}}.toJsonTree(value.actualInstance as {{{dataType}}}?).getAsJsonPrimitive()
+                        elementAdapter.write(out, primitive)
+                        return
+                    {{/isPrimitiveType}}
                     {{^isPrimitiveType}}
                         val element = adapter{{{dataType}}}.toJsonTree(value.actualInstance as {{{dataType}}}?)
                         elementAdapter.write(out, element)

samples/client/petstore/kotlin-model-prefix-type-mappings/src/main/kotlin/org/openapitools/client/models/ApiAnyOfUserOrPetOrArrayString.kt

@@ -73,9 +73,12 @@ data class ApiAnyOfUserOrPetOrArrayString(var actualInstance: Any? = null) {
                     }
                     // check if the actual instance is of the type `kotlin.collections.List<kotlin.String>`
                     if (value.actualInstance is List<*>) {
-                        val primitive = adapterkotlincollectionsListkotlinString.toJsonTree(value.actualInstance as kotlin.collections.List<kotlin.String>?).getAsJsonPrimitive()
-                        elementAdapter.write(out, primitive)
-                        return
+                        val list = value.actualInstance as List<Any>
+                        if (list.get(0) is kotlin.String) {
+                            val array = adapterkotlincollectionsListkotlinString.toJsonTree(value.actualInstance as kotlin.collections.List<kotlin.String>?).getAsJsonArray()
+                            elementAdapter.write(out, array)
+                            return
+                        }
                     }
                     throw IOException("Failed to serialize as the type doesn't match anyOf schemas: ApiPet, ApiUser, kotlin.collections.List<kotlin.String>")
                 }

samples/client/petstore/kotlin-model-prefix-type-mappings/src/main/kotlin/org/openapitools/client/models/ApiUserOrPetOrArrayString.kt

@@ -73,9 +73,12 @@ data class ApiUserOrPetOrArrayString(var actualInstance: Any? = null) {
                     }
                     // check if the actual instance is of the type `kotlin.collections.List<kotlin.String>`
                     if (value.actualInstance is List<*>) {
-                        val primitive = adapterkotlincollectionsListkotlinString.toJsonTree(value.actualInstance as kotlin.collections.List<kotlin.String>?).getAsJsonPrimitive()
-                        elementAdapter.write(out, primitive)
-                        return
+                        val list = value.actualInstance as List<Any>
+                        if (list.get(0) is kotlin.String) {
+                            val array = adapterkotlincollectionsListkotlinString.toJsonTree(value.actualInstance as kotlin.collections.List<kotlin.String>?).getAsJsonArray()
+                            elementAdapter.write(out, array)
+                            return
+                        }
                     }
                     throw IOException("Failed to serialize as the type doesn't match oneOf schemas: ApiPet, ApiUser, kotlin.collections.List<kotlin.String>")
                 }