change default value of disallowAdditionalPropertiesIfNotPresent

Author: ctreatma

modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenConstants.java

@@ -408,8 +408,8 @@ public static enum ENUM_PROPERTY_NAMING_TYPE {camelCase, PascalCase, snake_case,
 
     public static final String DISALLOW_ADDITIONAL_PROPERTIES_IF_NOT_PRESENT = "disallowAdditionalPropertiesIfNotPresent";
     public static final String DISALLOW_ADDITIONAL_PROPERTIES_IF_NOT_PRESENT_DESC =
-            "If false, the 'additionalProperties' implementation (set to true by default) is compliant with the OAS and JSON schema specifications. " +
-                    "If true (default), keep the old (incorrect) behaviour that 'additionalProperties' is set to false by default.";
+            "If false (default), the 'additionalProperties' implementation is compliant with the OAS and JSON schema specifications. " +
+                    "If true, keep the old (incorrect) behaviour that 'additionalProperties' is set to false by default.";
 
     public static final String UNSUPPORTED_V310_SPEC_MSG =
             "OpenAPI 3.1 support is still in beta. To report an issue related to 3.1 spec, please kindly open an issue in the Github repo: https://github.com/openAPITools/openapi-generator.";

modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java

@@ -1792,7 +1792,7 @@ public DefaultCodegen() {
         // option to change how we process + set the data in the 'additionalProperties' keyword.
         CliOption disallowAdditionalPropertiesIfNotPresentOpt = CliOption.newBoolean(
                 CodegenConstants.DISALLOW_ADDITIONAL_PROPERTIES_IF_NOT_PRESENT,
-                CodegenConstants.DISALLOW_ADDITIONAL_PROPERTIES_IF_NOT_PRESENT_DESC).defaultValue(Boolean.TRUE.toString());
+                CodegenConstants.DISALLOW_ADDITIONAL_PROPERTIES_IF_NOT_PRESENT_DESC).defaultValue(Boolean.FALSE.toString());
         Map<String, String> disallowAdditionalPropertiesIfNotPresentOpts = new HashMap<>();
         disallowAdditionalPropertiesIfNotPresentOpts.put("false",
                 "The 'additionalProperties' implementation is compliant with the OAS and JSON schema specifications.");