From a720d998f5241fc71050b29a00cfc120ba8c7620 Mon Sep 17 00:00:00 2001
From: Artur <artur@vaadin.com>
Date: Mon, 20 Feb 2017 17:25:13 +0200
Subject: Use an informative exception message when Binder is incorrectly
 constructed (#8631)

---
 server/src/main/java/com/vaadin/data/Binder.java | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'server')

diff --git a/server/src/main/java/com/vaadin/data/Binder.java b/server/src/main/java/com/vaadin/data/Binder.java
index 50bb182920..d678bdd321 100644
--- a/server/src/main/java/com/vaadin/data/Binder.java
+++ b/server/src/main/java/com/vaadin/data/Binder.java
@@ -1110,14 +1110,16 @@ public class Binder<BEAN> implements Serializable {
             @Override
             public Stream<PropertyDefinition<BEAN, ?>> getProperties() {
                 throw new IllegalStateException(
-                        "A Binder created with the default constructor doesn't support listing properties.");
+                        "This Binder instance was created using the default constructor. "
+                                + "To be able to use property names and bind to instance fields, create the binder using the Binder(Class<BEAN> beanType) constructor instead.");
             }
 
             @Override
             public Optional<PropertyDefinition<BEAN, ?>> getProperty(
                     String name) {
                 throw new IllegalStateException(
-                        "A Binder created with the default constructor doesn't support finding properties by name.");
+                        "This Binder instance was created using the default constructor. "
+                                + "To be able to use property names and bind to instance fields, create the binder using the Binder(Class<BEAN> beanType) constructor instead.");
             }
         });
     }
-- 
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