Fix type inference error (OpenAPITools#1773)

* Fix type inference error

* Update samples

bin/openapi3/kotlin-client-petstore.sh
bin/kotlin-client-petstore.sh

* Update samples

Author: ackintosh

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

@@ -23,7 +23,7 @@ class {{classname}}(basePath: kotlin.String = "{{{basePath}}}") : ApiClient(base
     fun {{operationId}}({{#allParams}}{{paramName}}: {{{dataType}}}{{#hasMore}}, {{/hasMore}}{{/allParams}}) : {{#returnType}}{{{returnType}}}{{/returnType}}{{^returnType}}Unit{{/returnType}} {
         val localVariableBody: kotlin.Any? = {{#hasBodyParam}}{{#bodyParams}}{{paramName}}{{/bodyParams}}{{/hasBodyParam}}{{^hasBodyParam}}{{^hasFormParams}}null{{/hasFormParams}}{{#hasFormParams}}mapOf({{#formParams}}"{{{baseName}}}" to "${{paramName}}"{{#hasMore}}, {{/hasMore}}{{/formParams}}){{/hasFormParams}}{{/hasBodyParam}}
         val localVariableQuery: MultiValueMap = {{^hasQueryParams}}mapOf(){{/hasQueryParams}}{{#hasQueryParams}}mapOf({{#queryParams}}"{{baseName}}" to {{#isContainer}}toMultiValue({{paramName}}.toList(), "{{collectionFormat}}"){{/isContainer}}{{^isContainer}}listOf("${{paramName}}"){{/isContainer}}{{#hasMore}}, {{/hasMore}}{{/queryParams}}){{/hasQueryParams}}
-        val localVariableHeaders: kotlin.collections.Map<kotlin.String,kotlin.String> = mapOf({{#hasFormParams}}"Content-Type" to "multipart/form-data"{{/hasFormParams}}{{^hasHeaderParams}}){{/hasHeaderParams}}{{#hasHeaderParams}}{{#hasFormParams}}, {{/hasFormParams}}{{#headerParams}}"{{baseName}}" to {{#isContainer}}{{paramName}}.joinToString(separator = collectionDelimiter("{{collectionFormat}}")){{/isContainer}}{{^isContainer}}{{paramName}}{{/isContainer}}{{#hasMore}}, {{/hasMore}}{{/headerParams}}){{/hasHeaderParams}}
+        val localVariableHeaders: kotlin.collections.Map<kotlin.String,kotlin.String> = mapOf({{#hasFormParams}}"Content-Type" to "multipart/form-data"{{/hasFormParams}}{{^hasHeaderParams}}){{/hasHeaderParams}}{{#hasHeaderParams}}{{#hasFormParams}}, {{/hasFormParams}}{{#headerParams}}"{{baseName}}" to {{#isContainer}}{{paramName}}.joinToString(separator = collectionDelimiter("{{collectionFormat}}")){{/isContainer}}{{^isContainer}}{{paramName}}.toString(){{/isContainer}}{{#hasMore}}, {{/hasMore}}{{/headerParams}}){{/hasHeaderParams}}
         val localVariableConfig = RequestConfig(
             RequestMethod.{{httpMethod}},
             "{{path}}"{{#pathParams}}.replace("{"+"{{baseName}}"+"}", "${{paramName}}"){{/pathParams}},

samples/client/petstore/kotlin-string/src/main/kotlin/org/openapitools/client/apis/PetApi.kt

@@ -59,7 +59,7 @@ class PetApi(basePath: kotlin.String = "http://petstore.swagger.io/v2") : ApiCli
     fun deletePet(petId: kotlin.Long, apiKey: kotlin.String) : Unit {
         val localVariableBody: kotlin.Any? = null
         val localVariableQuery: MultiValueMap = mapOf()
-        val localVariableHeaders: kotlin.collections.Map<kotlin.String,kotlin.String> = mapOf("api_key" to apiKey)
+        val localVariableHeaders: kotlin.collections.Map<kotlin.String,kotlin.String> = mapOf("api_key" to apiKey.toString())
         val localVariableConfig = RequestConfig(
             RequestMethod.DELETE,
             "/pet/{petId}".replace("{"+"petId"+"}", "$petId"),

samples/client/petstore/kotlin-threetenbp/src/main/kotlin/org/openapitools/client/apis/PetApi.kt

@@ -60,7 +60,7 @@ class PetApi(basePath: kotlin.String = "http://petstore.swagger.io/v2") : ApiCli
     fun deletePet(petId: kotlin.Long, apiKey: kotlin.String) : Unit {
         val localVariableBody: kotlin.Any? = null
         val localVariableQuery: MultiValueMap = mapOf()
-        val localVariableHeaders: kotlin.collections.Map<kotlin.String,kotlin.String> = mapOf("api_key" to apiKey)
+        val localVariableHeaders: kotlin.collections.Map<kotlin.String,kotlin.String> = mapOf("api_key" to apiKey.toString())
         val localVariableConfig = RequestConfig(
             RequestMethod.DELETE,
             "/pet/{petId}".replace("{"+"petId"+"}", "$petId"),

samples/client/petstore/kotlin/src/main/kotlin/org/openapitools/client/apis/PetApi.kt

@@ -59,7 +59,7 @@ class PetApi(basePath: kotlin.String = "http://petstore.swagger.io/v2") : ApiCli
     fun deletePet(petId: kotlin.Long, apiKey: kotlin.String) : Unit {
         val localVariableBody: kotlin.Any? = null
         val localVariableQuery: MultiValueMap = mapOf()
-        val localVariableHeaders: kotlin.collections.Map<kotlin.String,kotlin.String> = mapOf("api_key" to apiKey)
+        val localVariableHeaders: kotlin.collections.Map<kotlin.String,kotlin.String> = mapOf("api_key" to apiKey.toString())
         val localVariableConfig = RequestConfig(
             RequestMethod.DELETE,
             "/pet/{petId}".replace("{"+"petId"+"}", "$petId"),

samples/openapi3/client/petstore/kotlin/src/main/kotlin/org/openapitools/client/apis/FakeApi.kt

@@ -303,7 +303,7 @@ class FakeApi(basePath: kotlin.String = "http://petstore.swagger.io:80/v2") : Ap
     fun testEnumParameters(enumHeaderStringArray: kotlin.Array<kotlin.String>, enumHeaderString: kotlin.String, enumQueryStringArray: kotlin.Array<kotlin.String>, enumQueryString: kotlin.String, enumQueryInteger: kotlin.Int, enumQueryDouble: kotlin.Double, enumFormStringArray: kotlin.Array<kotlin.String>, enumFormString: kotlin.String) : Unit {
         val localVariableBody: kotlin.Any? = mapOf("enum_form_string_array" to "$enumFormStringArray", "enum_form_string" to "$enumFormString")
         val localVariableQuery: MultiValueMap = mapOf("enum_query_string_array" to toMultiValue(enumQueryStringArray.toList(), "multi"), "enum_query_string" to listOf("$enumQueryString"), "enum_query_integer" to listOf("$enumQueryInteger"), "enum_query_double" to listOf("$enumQueryDouble"))
-        val localVariableHeaders: kotlin.collections.Map<kotlin.String,kotlin.String> = mapOf("Content-Type" to "multipart/form-data", "enum_header_string_array" to enumHeaderStringArray.joinToString(separator = collectionDelimiter("csv")), "enum_header_string" to enumHeaderString)
+        val localVariableHeaders: kotlin.collections.Map<kotlin.String,kotlin.String> = mapOf("Content-Type" to "multipart/form-data", "enum_header_string_array" to enumHeaderStringArray.joinToString(separator = collectionDelimiter("csv")), "enum_header_string" to enumHeaderString.toString())
         val localVariableConfig = RequestConfig(
             RequestMethod.GET,
             "/fake",
@@ -339,7 +339,7 @@ class FakeApi(basePath: kotlin.String = "http://petstore.swagger.io:80/v2") : Ap
     fun testGroupParameters(requiredStringGroup: kotlin.Int, requiredBooleanGroup: kotlin.Boolean, requiredInt64Group: kotlin.Long, stringGroup: kotlin.Int, booleanGroup: kotlin.Boolean, int64Group: kotlin.Long) : Unit {
         val localVariableBody: kotlin.Any? = null
         val localVariableQuery: MultiValueMap = mapOf("required_string_group" to listOf("$requiredStringGroup"), "required_int64_group" to listOf("$requiredInt64Group"), "string_group" to listOf("$stringGroup"), "int64_group" to listOf("$int64Group"))
-        val localVariableHeaders: kotlin.collections.Map<kotlin.String,kotlin.String> = mapOf("required_boolean_group" to requiredBooleanGroup, "boolean_group" to booleanGroup)
+        val localVariableHeaders: kotlin.collections.Map<kotlin.String,kotlin.String> = mapOf("required_boolean_group" to requiredBooleanGroup.toString(), "boolean_group" to booleanGroup.toString())
         val localVariableConfig = RequestConfig(
             RequestMethod.DELETE,
             "/fake",

samples/openapi3/client/petstore/kotlin/src/main/kotlin/org/openapitools/client/apis/PetApi.kt

@@ -59,7 +59,7 @@ class PetApi(basePath: kotlin.String = "http://petstore.swagger.io:80/v2") : Api
     fun deletePet(petId: kotlin.Long, apiKey: kotlin.String) : Unit {
         val localVariableBody: kotlin.Any? = null
         val localVariableQuery: MultiValueMap = mapOf()
-        val localVariableHeaders: kotlin.collections.Map<kotlin.String,kotlin.String> = mapOf("api_key" to apiKey)
+        val localVariableHeaders: kotlin.collections.Map<kotlin.String,kotlin.String> = mapOf("api_key" to apiKey.toString())
         val localVariableConfig = RequestConfig(
             RequestMethod.DELETE,
             "/pet/{petId}".replace("{"+"petId"+"}", "$petId"),

samples/openapi3/client/petstore/kotlin/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt

@@ -1,7 +1,11 @@
 package org.openapitools.client.infrastructure
 
+import com.squareup.moshi.FromJson
+import com.squareup.moshi.Moshi
+import com.squareup.moshi.ToJson
 import okhttp3.*
 import java.io.File
+import java.util.*
 
 open class ApiClient(val baseUrl: String) {
     companion object {
@@ -51,7 +55,12 @@ open class ApiClient(val baseUrl: String) {
     protected inline fun <reified T: Any?> responseBody(body: ResponseBody?, mediaType: String = JsonMediaType): T? {
         if(body == null) return null
         return when(mediaType) {
-            JsonMediaType -> Serializer.moshi.adapter(T::class.java).fromJson(body.source())
+            JsonMediaType -> Moshi.Builder().add(object {
+                    @ToJson
+                    fun toJson(uuid: UUID) = uuid.toString()
+                    @FromJson
+                    fun fromJson(s: String) = UUID.fromString(s)
+                }).build().adapter(T::class.java).fromJson(body.source())
             else -> TODO()
         }
     }