--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.chromium.sdk/src/org/chromium/sdk/internal/protocol/EventNotification.java	Wed Dec 23 17:13:18 2009 -0800
@@ -0,0 +1,46 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.sdk.internal.protocol;
+
+import java.util.EnumSet;
+import java.util.List;
+
+import org.chromium.sdk.internal.protocol.data.SomeHandle;
+import org.chromium.sdk.internal.protocolparser.EnumValueCondition;
+import org.chromium.sdk.internal.protocolparser.JsonObjectBased;
+import org.chromium.sdk.internal.protocolparser.JsonOptionalField;
+import org.chromium.sdk.internal.protocolparser.JsonOverrideField;
+import org.chromium.sdk.internal.protocolparser.JsonSubtype;
+import org.chromium.sdk.internal.protocolparser.JsonSubtypeConditionCustom;
+import org.chromium.sdk.internal.protocolparser.JsonType;
+import org.json.simple.JSONObject;
+
+/**
+ * A type for event notification message. Its structure is similar
+ * to {@link SuccessCommandResponse}.
+ */
+@JsonType
+public interface EventNotification extends JsonObjectBased, JsonSubtype<IncomingMessage> {
+  @JsonOverrideField
+  @JsonSubtypeConditionCustom(condition=TypeValueCondition.class)
+  MessageType getType();
+
+  class TypeValueCondition extends EnumValueCondition<MessageType> {
+    public TypeValueCondition() {
+      super(EnumSet.of(MessageType.event));
+    }
+  }
+
+  String getEvent();
+
+  EventNotificationBody getBody();
+
+  // TODO(peter.rybin): does this field really exist?
+  @JsonOptionalField
+  JSONObject getException();
+
+  @JsonOptionalField
+  List<SomeHandle> getRefs();
+}