Empty and blank query parameter examples are parsed to null

[mih-kopylov]

Empty and blank query parameter examples are parsed to null, while it's expected them to be parsed to a valid empty or blank string respectively.

openapi: 3.0.2
info:
  title: Example references
  version: 1.0.0
paths:
  /foo:
    get:
      parameters:
        - name: paramName
          in: query
          example: " "
      responses:
        '200':
          description: success

result.getOpenAPI().getPaths().get("/foo").getGet().getParameters().get(0).getExample() returns null while I expect it to return " "

The same is with an empty string.

[mih-kopylov]

The reason seems to be in OpenAPIDeserializer#getAnyExample

            if (example.getNodeType().equals(JsonNodeType.STRING)) {
                String value = getString(nodeKey, node, false, location, result);
                //it checks a string for not blank
                if (StringUtils.isNotBlank(value)) {
                    return value;
                }
            }