Boolean Parameter with @Schema Annotation Changes Type to string in OpenAPI Documentation Fixes #2638

Author: bnasslahsen

springdoc-openapi-starter-common/src/main/java/org/springdoc/core/service/GenericParameterService.java

@@ -321,7 +321,9 @@ private void setSchema(io.swagger.v3.oas.annotations.Parameter parameterDoc, Com
 		else {
 			Schema schema = null;
 			try {
-				schema = AnnotationsUtils.getSchema(parameterDoc.schema(), null, false, parameterDoc.schema().implementation(), components, jsonView, propertyResolverUtils.isOpenapi31()).orElse(null);
+				if(StringUtils.isNotEmpty(parameterDoc.schema().type()) || !Void.class.equals(parameterDoc.schema().implementation())){
+					schema = AnnotationsUtils.getSchema(parameterDoc.schema(), null, false, parameterDoc.schema().implementation(), components, jsonView, propertyResolverUtils.isOpenapi31()).orElse(null);
+				}
 				// Cast default value
 				if (schema != null && schema.getDefault() != null) {
 					PrimitiveType primitiveType = PrimitiveType.fromTypeAndFormat(schema.getType(), schema.getFormat());

springdoc-openapi-starter-webmvc-api/src/test/resources/results/3.0.1/app206.json

@@ -23,7 +23,8 @@
             "in": "query",
             "required": true,
             "schema": {
-              "type": "string"
+              "type": "integer",
+              "format": "int64"
             }
           },
           {
@@ -57,7 +58,8 @@
             "in": "query",
             "required": true,
             "schema": {
-              "type": "string"
+              "type": "integer",
+              "format": "int32"
             }
           }
         ],