Fix issue-463 - add kotlin reserved words

Author: Степан Русаков

src/main/java/io/swagger/codegen/v3/generators/kotlin/AbstractKotlinCodegen.java

@@ -17,14 +17,12 @@
 import java.util.Map;
 import java.util.Set;
 
-public abstract class AbstractKotlinCodegen extends DefaultCodegenConfig  {
+public abstract class AbstractKotlinCodegen extends DefaultCodegenConfig {
 
     private static Logger LOGGER = LoggerFactory.getLogger(AbstractKotlinCodegen.class);
 
     private Set<String> instantiationLibraryFunction;
 
-   
-
     protected String artifactId;
     protected String artifactVersion = "1.0.0";
     protected String groupId = "io.swagger";
@@ -62,6 +60,7 @@ public AbstractKotlinCodegen() {
         // as well as keywords from https://kotlinlang.org/docs/reference/keyword-reference.html
         reservedWords = new HashSet<String>(Arrays.asList(
                 "abstract",
+                "actual",
                 "annotation",
                 "as",
                 "break",
@@ -78,6 +77,7 @@ public AbstractKotlinCodegen() {
                 "do",
                 "else",
                 "enum",
+                "expect",
                 "external",
                 "false",
                 "final",
@@ -272,7 +272,7 @@ public void setEnumPropertyNaming(final String enumPropertyNamingType) {
     public String getTypeDeclaration(Schema propertySchema) {
         if (propertySchema instanceof ArraySchema) {
             return getArrayTypeDeclaration((ArraySchema) propertySchema);
-        } else if (propertySchema instanceof MapSchema  && hasSchemaProperties(propertySchema)) {
+        } else if (propertySchema instanceof MapSchema && hasSchemaProperties(propertySchema)) {
             Schema inner = (Schema) propertySchema.getAdditionalProperties();
             if (inner == null) {
                 LOGGER.warn(propertySchema.getName() + "(map property) does not have a proper inner type defined");
@@ -444,7 +444,7 @@ public String toEnumVarName(String value, String datatype) {
                 break;
         }
 
-        if (reservedWords.contains(modified)) {
+        if (isReservedWord(modified)) {
             return escapeReservedWord(modified);
         }
 
@@ -498,7 +498,7 @@ public String toModelName(final String name) {
         String modifiedName = name.replaceAll("\\.", "");
         modifiedName = sanitizeKotlinSpecificNames(modifiedName);
 
-        if (reservedWords.contains(modifiedName)) {
+        if (isReservedWord(modifiedName)) {
             modifiedName = escapeReservedWord(modifiedName);
         }
 
@@ -578,11 +578,11 @@ protected boolean isReservedWord(String word) {
     protected boolean needToImport(String type) {
         // provides extra protection against improperly trying to import language primitives and java types
         boolean imports =
-            !type.startsWith("kotlin.") &&
-            !type.startsWith("java.") &&
-            !defaultIncludes.contains(type) &&
-            !languageSpecificPrimitives.contains(type) &&
-            !instantiationLibraryFunction.contains(type);
+                !type.startsWith("kotlin.") &&
+                        !type.startsWith("java.") &&
+                        !defaultIncludes.contains(type) &&
+                        !languageSpecificPrimitives.contains(type) &&
+                        !instantiationLibraryFunction.contains(type);
 
         return imports;
     }