[BUG][Kotlin] Add support for collection of generic classes (Jackson / Gson / Moshi) (#9918)

* Cherry picked commits from add-support-for-collection-of-generic-classes

* Regenerated samples

* Missing work by @adamsz-lume

* Try to fix maven plugin error

Co-authored-by: Bruno Coelho <4brunu@gmail.com>

modules/openapi-generator-maven-plugin/examples/kotlin.xml

@@ -238,7 +238,7 @@
 		<junit-version>4.8.1</junit-version>
 		<kotlin.version>1.5.10</kotlin.version>
 		<kotlinJvmTarget>1.8</kotlinJvmTarget>
-		<moshi-kotlin.version>1.8.0</moshi-kotlin.version>
+		<moshi-kotlin.version>1.12.0</moshi-kotlin.version>
 		<migbase64.version>2.2</migbase64.version>
 	</properties>
 </project>

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

@@ -62,9 +62,11 @@ dependencies {
     {{^moshiCodeGen}}
     implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
     implementation "com.squareup.moshi:moshi-kotlin:1.12.0"
+    implementation "com.squareup.moshi:moshi-adapters:1.12.0"
     {{/moshiCodeGen}}
     {{#moshiCodeGen}}
     implementation "com.squareup.moshi:moshi:1.12.0"
+    implementation "com.squareup.moshi:moshi-adapters:1.12.0"
     kapt "com.squareup.moshi:moshi-kotlin-codegen:1.12.0"
     {{/moshiCodeGen}}
     {{/moshi}}
@@ -126,4 +128,4 @@ tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).configureEach {
         freeCompilerArgs += "-Xopt-in=kotlinx.serialization.ExperimentalSerializationApi"
     }
 }
-{{/kotlinx_serialization}}
+{{/kotlinx_serialization}}

modules/openapi-generator/src/main/resources/kotlin-client/libraries/jvm-okhttp/infrastructure/ApiClient.kt.mustache

@@ -55,6 +55,15 @@ import org.threeten.bp.LocalTime
 import org.threeten.bp.OffsetDateTime
 import org.threeten.bp.OffsetTime
 {{/threetenbp}}
+{{#gson}}
+import com.google.gson.reflect.TypeToken
+{{/gson}}
+{{#jackson}}
+import com.fasterxml.jackson.core.type.TypeReference
+{{/jackson}}
+{{#moshi}}
+import com.squareup.moshi.adapter
+{{/moshi}}
 
 {{#nonPublicApi}}internal {{/nonPublicApi}}open class ApiClient(val baseUrl: String) {
     {{#nonPublicApi}}internal {{/nonPublicApi}}companion object {
@@ -173,6 +182,9 @@ import org.threeten.bp.OffsetTime
             else -> throw UnsupportedOperationException("requestBody currently only supports JSON body and File body.")
         }
 
+    {{#moshi}}
+    @OptIn(ExperimentalStdlibApi::class)
+    {{/moshi}}
     protected inline fun <reified T: Any?> responseBody(body: ResponseBody?, mediaType: String? = JsonMediaType): T? {
         if(body == null) {
             return null
@@ -201,7 +213,7 @@ import org.threeten.bp.OffsetTime
             return f as T
         }
         return when(mediaType) {
-            JsonMediaType -> {{#moshi}}Serializer.moshi.adapter(T::class.java).fromJson(bodyContent){{/moshi}}{{#gson}}Serializer.gson.fromJson(bodyContent, T::class.java){{/gson}}{{#jackson}}Serializer.jacksonObjectMapper.readValue(bodyContent, T::class.java){{/jackson}}{{#kotlinx_serialization}}Serializer.jvmJson.decodeFromString<T>(bodyContent){{/kotlinx_serialization}}
+            JsonMediaType -> {{#moshi}}Serializer.moshi.adapter<T>().fromJson(bodyContent){{/moshi}}{{#gson}}Serializer.gson.fromJson(bodyContent, (object: TypeToken<T>(){}).getType()){{/gson}}{{#jackson}}Serializer.jacksonObjectMapper.readValue(bodyContent, object: TypeReference<T>() {}){{/jackson}}{{#kotlinx_serialization}}Serializer.jvmJson.decodeFromString<T>(bodyContent){{/kotlinx_serialization}}
             else ->  throw UnsupportedOperationException("responseBody currently only supports JSON body.")
         }
     }

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

@@ -22,6 +22,7 @@ import java.time.OffsetDateTime
 import java.time.OffsetTime
 import java.util.Date
 import java.util.Locale
+import com.google.gson.reflect.TypeToken
 
 open class ApiClient(val baseUrl: String) {
     companion object {
@@ -124,7 +125,7 @@ open class ApiClient(val baseUrl: String) {
             return f as T
         }
         return when(mediaType) {
-            JsonMediaType -> Serializer.gson.fromJson(bodyContent, T::class.java)
+            JsonMediaType -> Serializer.gson.fromJson(bodyContent, (object: TypeToken<T>(){}).getType())
             else ->  throw UnsupportedOperationException("responseBody currently only supports JSON body.")
         }
     }

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

@@ -22,6 +22,7 @@ import java.time.OffsetDateTime
 import java.time.OffsetTime
 import java.util.Date
 import java.util.Locale
+import com.fasterxml.jackson.core.type.TypeReference
 
 open class ApiClient(val baseUrl: String) {
     companion object {
@@ -124,7 +125,7 @@ open class ApiClient(val baseUrl: String) {
             return f as T
         }
         return when(mediaType) {
-            JsonMediaType -> Serializer.jacksonObjectMapper.readValue(bodyContent, T::class.java)
+            JsonMediaType -> Serializer.jacksonObjectMapper.readValue(bodyContent, object: TypeReference<T>() {})
             else ->  throw UnsupportedOperationException("responseBody currently only supports JSON body.")
         }
     }

samples/client/petstore/kotlin-json-request-string/build.gradle

@@ -32,6 +32,7 @@ dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
     implementation "com.squareup.moshi:moshi-kotlin:1.12.0"
+    implementation "com.squareup.moshi:moshi-adapters:1.12.0"
     implementation "com.squareup.okhttp3:okhttp:4.9.1"
     testImplementation "io.kotlintest:kotlintest-runner-junit5:3.4.2"
 }

samples/client/petstore/kotlin-json-request-string/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt

@@ -23,6 +23,7 @@ import java.time.OffsetDateTime
 import java.time.OffsetTime
 import java.util.Date
 import java.util.Locale
+import com.squareup.moshi.adapter
 
 open class ApiClient(val baseUrl: String) {
     companion object {
@@ -107,6 +108,7 @@ open class ApiClient(val baseUrl: String) {
             else -> throw UnsupportedOperationException("requestBody currently only supports JSON body and File body.")
         }
 
+    @OptIn(ExperimentalStdlibApi::class)
     protected inline fun <reified T: Any?> responseBody(body: ResponseBody?, mediaType: String? = JsonMediaType): T? {
         if(body == null) {
             return null
@@ -130,7 +132,7 @@ open class ApiClient(val baseUrl: String) {
             return f as T
         }
         return when(mediaType) {
-            JsonMediaType -> Serializer.moshi.adapter(T::class.java).fromJson(bodyContent)
+            JsonMediaType -> Serializer.moshi.adapter<T>().fromJson(bodyContent)
             else ->  throw UnsupportedOperationException("responseBody currently only supports JSON body.")
         }
     }

samples/client/petstore/kotlin-jvm-okhttp4-coroutines/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt

@@ -22,6 +22,7 @@ import java.time.OffsetDateTime
 import java.time.OffsetTime
 import java.util.Date
 import java.util.Locale
+import com.google.gson.reflect.TypeToken
 
 open class ApiClient(val baseUrl: String) {
     companion object {
@@ -124,7 +125,7 @@ open class ApiClient(val baseUrl: String) {
             return f as T
         }
         return when(mediaType) {
-            JsonMediaType -> Serializer.gson.fromJson(bodyContent, T::class.java)
+            JsonMediaType -> Serializer.gson.fromJson(bodyContent, (object: TypeToken<T>(){}).getType())
             else ->  throw UnsupportedOperationException("responseBody currently only supports JSON body.")
         }
     }

samples/client/petstore/kotlin-moshi-codegen/build.gradle

@@ -31,6 +31,7 @@ test {
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation "com.squareup.moshi:moshi:1.12.0"
+    implementation "com.squareup.moshi:moshi-adapters:1.12.0"
     kapt "com.squareup.moshi:moshi-kotlin-codegen:1.12.0"
     implementation "com.squareup.okhttp3:okhttp:4.9.1"
     testImplementation "io.kotlintest:kotlintest-runner-junit5:3.4.2"

samples/client/petstore/kotlin-moshi-codegen/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt

@@ -22,6 +22,7 @@ import java.time.OffsetDateTime
 import java.time.OffsetTime
 import java.util.Date
 import java.util.Locale
+import com.squareup.moshi.adapter
 
 open class ApiClient(val baseUrl: String) {
     companion object {
@@ -106,6 +107,7 @@ open class ApiClient(val baseUrl: String) {
             else -> throw UnsupportedOperationException("requestBody currently only supports JSON body and File body.")
         }
 
+    @OptIn(ExperimentalStdlibApi::class)
     protected inline fun <reified T: Any?> responseBody(body: ResponseBody?, mediaType: String? = JsonMediaType): T? {
         if(body == null) {
             return null
@@ -124,7 +126,7 @@ open class ApiClient(val baseUrl: String) {
             return f as T
         }
         return when(mediaType) {
-            JsonMediaType -> Serializer.moshi.adapter(T::class.java).fromJson(bodyContent)
+            JsonMediaType -> Serializer.moshi.adapter<T>().fromJson(bodyContent)
             else ->  throw UnsupportedOperationException("responseBody currently only supports JSON body.")
         }
     }

samples/client/petstore/kotlin-nonpublic/build.gradle

@@ -31,6 +31,7 @@ dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
     implementation "com.squareup.moshi:moshi-kotlin:1.12.0"
+    implementation "com.squareup.moshi:moshi-adapters:1.12.0"
     implementation "com.squareup.okhttp3:okhttp:4.9.1"
     testImplementation "io.kotlintest:kotlintest-runner-junit5:3.4.2"
 }

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

@@ -22,6 +22,7 @@ import java.time.OffsetDateTime
 import java.time.OffsetTime
 import java.util.Date
 import java.util.Locale
+import com.squareup.moshi.adapter
 
 internal open class ApiClient(val baseUrl: String) {
     internal companion object {
@@ -106,6 +107,7 @@ internal open class ApiClient(val baseUrl: String) {
             else -> throw UnsupportedOperationException("requestBody currently only supports JSON body and File body.")
         }
 
+    @OptIn(ExperimentalStdlibApi::class)
     protected inline fun <reified T: Any?> responseBody(body: ResponseBody?, mediaType: String? = JsonMediaType): T? {
         if(body == null) {
             return null
@@ -124,7 +126,7 @@ internal open class ApiClient(val baseUrl: String) {
             return f as T
         }
         return when(mediaType) {
-            JsonMediaType -> Serializer.moshi.adapter(T::class.java).fromJson(bodyContent)
+            JsonMediaType -> Serializer.moshi.adapter<T>().fromJson(bodyContent)
             else ->  throw UnsupportedOperationException("responseBody currently only supports JSON body.")
         }
     }

samples/client/petstore/kotlin-nullable/build.gradle

@@ -31,6 +31,7 @@ dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
     implementation "com.squareup.moshi:moshi-kotlin:1.12.0"
+    implementation "com.squareup.moshi:moshi-adapters:1.12.0"
     implementation "com.squareup.okhttp3:okhttp:4.9.1"
     testImplementation "io.kotlintest:kotlintest-runner-junit5:3.4.2"
 }

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

@@ -22,6 +22,7 @@ import java.time.OffsetDateTime
 import java.time.OffsetTime
 import java.util.Date
 import java.util.Locale
+import com.squareup.moshi.adapter
 
 open class ApiClient(val baseUrl: String) {
     companion object {
@@ -106,6 +107,7 @@ open class ApiClient(val baseUrl: String) {
             else -> throw UnsupportedOperationException("requestBody currently only supports JSON body and File body.")
         }
 
+    @OptIn(ExperimentalStdlibApi::class)
     protected inline fun <reified T: Any?> responseBody(body: ResponseBody?, mediaType: String? = JsonMediaType): T? {
         if(body == null) {
             return null
@@ -124,7 +126,7 @@ open class ApiClient(val baseUrl: String) {
             return f as T
         }
         return when(mediaType) {
-            JsonMediaType -> Serializer.moshi.adapter(T::class.java).fromJson(bodyContent)
+            JsonMediaType -> Serializer.moshi.adapter<T>().fromJson(bodyContent)
             else ->  throw UnsupportedOperationException("responseBody currently only supports JSON body.")
         }
     }

samples/client/petstore/kotlin-okhttp3/build.gradle

@@ -31,6 +31,7 @@ dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
     implementation "com.squareup.moshi:moshi-kotlin:1.12.0"
+    implementation "com.squareup.moshi:moshi-adapters:1.12.0"
     implementation "com.squareup.okhttp3:okhttp:3.12.13"
     testImplementation "io.kotlintest:kotlintest-runner-junit5:3.4.2"
 }

samples/client/petstore/kotlin-okhttp3/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt

@@ -20,6 +20,7 @@ import java.time.OffsetDateTime
 import java.time.OffsetTime
 import java.util.Date
 import java.util.Locale
+import com.squareup.moshi.adapter
 
 open class ApiClient(val baseUrl: String) {
     companion object {
@@ -104,6 +105,7 @@ open class ApiClient(val baseUrl: String) {
             else -> throw UnsupportedOperationException("requestBody currently only supports JSON body and File body.")
         }
 
+    @OptIn(ExperimentalStdlibApi::class)
     protected inline fun <reified T: Any?> responseBody(body: ResponseBody?, mediaType: String? = JsonMediaType): T? {
         if(body == null) {
             return null
@@ -122,7 +124,7 @@ open class ApiClient(val baseUrl: String) {
             return f as T
         }
         return when(mediaType) {
-            JsonMediaType -> Serializer.moshi.adapter(T::class.java).fromJson(bodyContent)
+            JsonMediaType -> Serializer.moshi.adapter<T>().fromJson(bodyContent)
             else ->  throw UnsupportedOperationException("responseBody currently only supports JSON body.")
         }
     }

samples/client/petstore/kotlin-retrofit2-rx3/build.gradle

@@ -33,6 +33,7 @@ dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
     implementation "com.squareup.moshi:moshi-kotlin:1.12.0"
+    implementation "com.squareup.moshi:moshi-adapters:1.12.0"
     implementation "org.apache.oltu.oauth2:org.apache.oltu.oauth2.client:1.0.2"
     implementation "com.squareup.okhttp3:logging-interceptor:4.9.1"
     implementation "io.reactivex.rxjava3:rxjava:$rxJava3Version"

samples/client/petstore/kotlin-retrofit2/build.gradle

@@ -32,6 +32,7 @@ dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
     implementation "com.squareup.moshi:moshi-kotlin:1.12.0"
+    implementation "com.squareup.moshi:moshi-adapters:1.12.0"
     implementation "org.apache.oltu.oauth2:org.apache.oltu.oauth2.client:1.0.2"
     implementation "com.squareup.okhttp3:logging-interceptor:4.9.1"
     implementation "com.squareup.retrofit2:retrofit:$retrofitVersion"

samples/client/petstore/kotlin-string/build.gradle

@@ -31,6 +31,7 @@ dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
     implementation "com.squareup.moshi:moshi-kotlin:1.12.0"
+    implementation "com.squareup.moshi:moshi-adapters:1.12.0"
     implementation "com.squareup.okhttp3:okhttp:4.9.1"
     testImplementation "io.kotlintest:kotlintest-runner-junit5:3.4.2"
 }

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

@@ -22,6 +22,7 @@ import java.time.OffsetDateTime
 import java.time.OffsetTime
 import java.util.Date
 import java.util.Locale
+import com.squareup.moshi.adapter
 
 open class ApiClient(val baseUrl: String) {
     companion object {
@@ -106,6 +107,7 @@ open class ApiClient(val baseUrl: String) {
             else -> throw UnsupportedOperationException("requestBody currently only supports JSON body and File body.")
         }
 
+    @OptIn(ExperimentalStdlibApi::class)
     protected inline fun <reified T: Any?> responseBody(body: ResponseBody?, mediaType: String? = JsonMediaType): T? {
         if(body == null) {
             return null
@@ -124,7 +126,7 @@ open class ApiClient(val baseUrl: String) {
             return f as T
         }
         return when(mediaType) {
-            JsonMediaType -> Serializer.moshi.adapter(T::class.java).fromJson(bodyContent)
+            JsonMediaType -> Serializer.moshi.adapter<T>().fromJson(bodyContent)
             else ->  throw UnsupportedOperationException("responseBody currently only supports JSON body.")
         }
     }

samples/client/petstore/kotlin-threetenbp/build.gradle

@@ -31,6 +31,7 @@ dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
     implementation "com.squareup.moshi:moshi-kotlin:1.12.0"
+    implementation "com.squareup.moshi:moshi-adapters:1.12.0"
     implementation "com.squareup.okhttp3:okhttp:4.9.1"
     implementation "org.threeten:threetenbp:1.5.1"
     testImplementation "io.kotlintest:kotlintest-runner-junit5:3.4.2"

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

@@ -22,6 +22,7 @@ import org.threeten.bp.LocalDateTime
 import org.threeten.bp.LocalTime
 import org.threeten.bp.OffsetDateTime
 import org.threeten.bp.OffsetTime
+import com.squareup.moshi.adapter
 
 open class ApiClient(val baseUrl: String) {
     companion object {
@@ -106,6 +107,7 @@ open class ApiClient(val baseUrl: String) {
             else -> throw UnsupportedOperationException("requestBody currently only supports JSON body and File body.")
         }
 
+    @OptIn(ExperimentalStdlibApi::class)
     protected inline fun <reified T: Any?> responseBody(body: ResponseBody?, mediaType: String? = JsonMediaType): T? {
         if(body == null) {
             return null
@@ -124,7 +126,7 @@ open class ApiClient(val baseUrl: String) {
             return f as T
         }
         return when(mediaType) {
-            JsonMediaType -> Serializer.moshi.adapter(T::class.java).fromJson(bodyContent)
+            JsonMediaType -> Serializer.moshi.adapter<T>().fromJson(bodyContent)
             else ->  throw UnsupportedOperationException("responseBody currently only supports JSON body.")
         }
     }

samples/client/petstore/kotlin-uppercase-enum/build.gradle

@@ -31,6 +31,7 @@ dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
     implementation "com.squareup.moshi:moshi-kotlin:1.12.0"
+    implementation "com.squareup.moshi:moshi-adapters:1.12.0"
     implementation "com.squareup.okhttp3:okhttp:4.9.1"
     testImplementation "io.kotlintest:kotlintest-runner-junit5:3.4.2"
 }

samples/client/petstore/kotlin-uppercase-enum/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt

@@ -22,6 +22,7 @@ import java.time.OffsetDateTime
 import java.time.OffsetTime
 import java.util.Date
 import java.util.Locale
+import com.squareup.moshi.adapter
 
 open class ApiClient(val baseUrl: String) {
     companion object {
@@ -106,6 +107,7 @@ open class ApiClient(val baseUrl: String) {
             else -> throw UnsupportedOperationException("requestBody currently only supports JSON body and File body.")
         }
 
+    @OptIn(ExperimentalStdlibApi::class)
     protected inline fun <reified T: Any?> responseBody(body: ResponseBody?, mediaType: String? = JsonMediaType): T? {
         if(body == null) {
             return null
@@ -124,7 +126,7 @@ open class ApiClient(val baseUrl: String) {
             return f as T
         }
         return when(mediaType) {
-            JsonMediaType -> Serializer.moshi.adapter(T::class.java).fromJson(bodyContent)
+            JsonMediaType -> Serializer.moshi.adapter<T>().fromJson(bodyContent)
             else ->  throw UnsupportedOperationException("responseBody currently only supports JSON body.")
         }
     }

samples/client/petstore/kotlin/build.gradle

@@ -31,6 +31,7 @@ dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
     implementation "com.squareup.moshi:moshi-kotlin:1.12.0"
+    implementation "com.squareup.moshi:moshi-adapters:1.12.0"
     implementation "com.squareup.okhttp3:okhttp:4.9.1"
     testImplementation "io.kotlintest:kotlintest-runner-junit5:3.4.2"
 }

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

@@ -22,6 +22,7 @@ import java.time.OffsetDateTime
 import java.time.OffsetTime
 import java.util.Date
 import java.util.Locale
+import com.squareup.moshi.adapter
 
 open class ApiClient(val baseUrl: String) {
     companion object {
@@ -106,6 +107,7 @@ open class ApiClient(val baseUrl: String) {
             else -> throw UnsupportedOperationException("requestBody currently only supports JSON body and File body.")
         }
 
+    @OptIn(ExperimentalStdlibApi::class)
     protected inline fun <reified T: Any?> responseBody(body: ResponseBody?, mediaType: String? = JsonMediaType): T? {
         if(body == null) {
             return null
@@ -124,7 +126,7 @@ open class ApiClient(val baseUrl: String) {
             return f as T
         }
         return when(mediaType) {
-            JsonMediaType -> Serializer.moshi.adapter(T::class.java).fromJson(bodyContent)
+            JsonMediaType -> Serializer.moshi.adapter<T>().fromJson(bodyContent)
             else ->  throw UnsupportedOperationException("responseBody currently only supports JSON body.")
         }
     }