open-api: fix minor upgrade/breaking changes

Author: jknack

modules/jooby-openapi/src/main/java/io/jooby/internal/openapi/ParameterExt.java

@@ -25,6 +25,7 @@ public class ParameterExt extends Parameter {
   @JsonIgnore private boolean single = true;
 
   @JsonIgnore private List<AnnotationNode> annotations = List.of();
+  @JsonIgnore private boolean defaultValueSet;
 
   public void setJavaType(String javaType) {
     this.javaType = javaType;
@@ -34,6 +35,10 @@ public String getJavaType() {
     return javaType;
   }
 
+  public boolean isDefaultValueSet() {
+    return defaultValueSet;
+  }
+
   public Object getDefaultValue() {
     if (defaultValue != null) {
       if (javaType.equals(boolean.class.getName())) {
@@ -58,6 +63,7 @@ public void setSingle(boolean single) {
 
   public void setDefaultValue(Object defaultValue) {
     this.defaultValue = defaultValue;
+    this.defaultValueSet = true;
   }
 
   @Override

modules/jooby-openapi/src/main/java/io/jooby/internal/openapi/RouteParser.java

@@ -195,7 +195,9 @@ private List<Parameter> checkParameters(ParserContext ctx, List<Parameter> param
         Optional.ofNullable(ctx.schema(javaType))
             .ifPresent(
                 schema -> {
-                  schema.setDefault(paramExt.getDefaultValue());
+                  if (paramExt.isDefaultValueSet()) {
+                    schema.setDefault(paramExt.getDefaultValue());
+                  }
                   parameter.setSchema(schema);
                 });
       }

modules/jooby-openapi/src/main/java/io/jooby/internal/openapi/projection/SchemaPruner.java

@@ -120,7 +120,9 @@ private static void copyMetadata(Schema<?> source, Schema<?> target) {
     target.setTitle(source.getTitle());
     target.setDescription(source.getDescription());
     target.setFormat(source.getFormat());
-    target.setDefault(source.getDefault());
+    if (source.getDefaultSetFlag()) {
+      target.setDefault(source.getDefault());
+    }
     if (source.getExample() != null) {
       target.setExample(source.getExample());
     }

pom.xml

@@ -112,8 +112,8 @@
     <vertx.version>5.0.8</vertx.version>
 
     <!--OpenAPI-->
-    <swagger.version>2.2.44</swagger.version>
-    <swagger-parser.version>2.1.38</swagger-parser.version>
+    <swagger.version>2.2.45</swagger.version>
+    <swagger-parser.version>2.1.39</swagger-parser.version>
     <redoc.version>2.0.0-rc.20</redoc.version>
 
     <!-- SSL -->