From 723492b0a6fb5cdadf7941d8304a9aea8a850dfb Mon Sep 17 00:00:00 2001
From: gjorgievskivlatko <gjorgievskivlatko@gmail.com>
Date: Tue, 4 Aug 2020 14:20:00 +0200
Subject: [PATCH] Allow filter property to be an empty string

---
 .../src/main/java/org/springdoc/ui/AbstractSwaggerWelcome.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/springdoc-openapi-common/src/main/java/org/springdoc/ui/AbstractSwaggerWelcome.java b/springdoc-openapi-common/src/main/java/org/springdoc/ui/AbstractSwaggerWelcome.java
index 44889c376..fcbf5df0c 100644
--- a/springdoc-openapi-common/src/main/java/org/springdoc/ui/AbstractSwaggerWelcome.java
+++ b/springdoc-openapi-common/src/main/java/org/springdoc/ui/AbstractSwaggerWelcome.java
@@ -139,8 +139,9 @@ protected UriComponentsBuilder getUriComponentsBuilder(String sbUrl) {
 			uriBuilder.queryParam(SwaggerUiConfigParameters.CONFIG_URL_PROPERTY, swaggerUiConfigParameters.getConfigUrl());
 			if (StringUtils.isNotEmpty(swaggerUiConfigParameters.getLayout()))
 				uriBuilder.queryParam(SwaggerUiConfigParameters.LAYOUT_PROPERTY, swaggerUiConfigParameters.getLayout());
-			if (StringUtils.isNotEmpty(swaggerUiConfigParameters.getFilter()))
+			if (swaggerUiConfigParameters.getFilter() != null) {
 				uriBuilder.queryParam(SwaggerUiConfigParameters.FILTER_PROPERTY, swaggerUiConfigParameters.getFilter());
+			}
 		}
 		return uriBuilder;
 	}