🐛 Fix nested array type

CHANGELOG.md

@@ -1,6 +1,11 @@
 Change Log
 ==========
 
+## 2.1.2 (TBD)
+
+### Fixed
+- Nested arrays and maps in arrays contain type. Array<Array>> is now properly generated as Array<Array<Type>>.
+
 ## 2.1.1 (2020-04-22)
 
 ### Fixed

gradle.properties

@@ -1,3 +1,3 @@
 org.gradle.jvmargs=-Xmx1536m
 
-version=2.1.1
+version=2.1.2

lib/src/main/kotlin/cz/eman/swagger/codegen/generator/kotlin/KotlinClientCodegen.kt

@@ -9,6 +9,7 @@ import io.swagger.v3.oas.models.media.*
 import org.gradle.util.CollectionUtils.sort
 import org.openapitools.codegen.*
 import org.openapitools.codegen.languages.AbstractKotlinCodegen
+import org.openapitools.codegen.utils.ModelUtils
 import org.slf4j.Logger
 import org.slf4j.LoggerFactory
 import java.io.File
@@ -143,9 +144,22 @@ open class KotlinClientCodegen : org.openapitools.codegen.languages.KotlinClient
     override fun fromModel(name: String?, schema: Schema<*>?): CodegenModel {
         emptyDataClassAsString(name, schema)
         composedArrayAsAny(name, schema)
+        fixArrayItemsSchema(name, schema)
         return super.fromModel(name, schema)
     }
 
+    /**
+     * Modifies property before actual [fromProperty] function is called. Fixes [ArraySchema] items to contain proper
+     * [ArraySchema] or [MapSchema] since it lost it's type and generated incorrect data type for nested arrays and
+     * maps.
+     *
+     * @since 2.1.2
+     */
+    override fun fromProperty(name: String?, schema: Schema<*>?): CodegenProperty {
+        fixArrayItemsSchema(name, schema)
+        return super.fromProperty(name, schema)
+    }
+
     /**
      * Enum number names are unified with Java code generation.
      *
@@ -512,6 +526,23 @@ open class KotlinClientCodegen : org.openapitools.codegen.languages.KotlinClient
         }
     }
 
+    /**
+     * Fixes [ArraySchema] items to contain proper [ArraySchema] or [MapSchema] since it lost it's type and generated
+     * incorrect data type for nested arrays and maps.
+     *
+     * @since 2.1.2
+     */
+    private fun fixArrayItemsSchema(name: String?, property: Schema<*>?) {
+        if(property is ArraySchema && property.items != null) {
+            logger.info("Trying to fix array items for: $name")
+            val itemsSchema = ModelUtils.getReferencedSchema(openAPI, property.items)
+            if(ModelUtils.isMapSchema(itemsSchema) || ModelUtils.isArraySchema(itemsSchema)) {
+                logger.info("Array items is Map or Array schema")
+                property.items = itemsSchema
+            }
+        }
+    }
+
     /**
      * Sets vendor extensions to the model and it's properties. Extensions added: [markModelAsTypeAlias] and
      * [escapePropertyBaseNameLiteral].