Make the BeanToJsonConverter avoid fields from java.lang.Object

I'm suspicious about the need for us to send "class"
backwards and forwards, but it's apparently used by to
reconstitute exceptions so we should probably leave it.

java/client/src/org/openqa/selenium/json/BeanToJsonConverter.java

@@ -245,8 +245,9 @@ private JsonElement mapObject(Object toConvert, int maxDepth, boolean skipNulls)
         continue;
       }
 
+      // Only include methods not on java.lang.Object to stop things being super-noisy
       Method readMethod = pd.getReadMethod();
-      if (readMethod == null) {
+      if (readMethod == null || Object.class.equals(readMethod.getDeclaringClass())) {
         continue;
       }
 

java/client/test/org/openqa/selenium/json/BeanToJsonConverterTest.java

@@ -25,6 +25,7 @@
 import static org.junit.Assert.assertThat;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
+import static org.openqa.selenium.json.Json.MAP_TYPE;
 
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.ImmutableSortedSet;
@@ -59,6 +60,10 @@
 import org.openqa.selenium.remote.SessionId;
 
 import java.awt.*;
+import java.beans.FeatureDescriptor;
+import java.beans.IntrospectionException;
+import java.beans.Introspector;
+import java.beans.PropertyDescriptor;
 import java.io.StringReader;
 import java.net.MalformedURLException;
 import java.net.URL;
@@ -70,6 +75,7 @@
 import java.util.Set;
 import java.util.concurrent.TimeUnit;
 import java.util.logging.Level;
+import java.util.stream.Stream;
 
 
 @RunWith(JUnit4.class)
@@ -534,6 +540,20 @@ public void shouldConvertAUrlToAString() throws MalformedURLException {
     assertEquals(url.toExternalForm(), converted.get("url").getAsString());
   }
 
+  @Test
+  public void shouldNotIncludePropertiesFromJavaLangObjectOtherThanClass()
+      throws IntrospectionException {
+    String json = new BeanToJsonConverter().convert(new SimpleBean());
+
+    JsonObject converted = new JsonParser().parse(json).getAsJsonObject();
+
+    Stream.of(SimplePropertyDescriptor.getPropertyDescriptors(Object.class))
+        .filter(pd -> !"class".equals(pd.getName()))
+        .map(SimplePropertyDescriptor::getName)
+        .peek(System.out::println)
+        .forEach(name -> assertFalse(name, converted.keySet().contains(name)));
+  }
+
   @SuppressWarnings("unused")
   private static class SimpleBean {