Add shared state for CustomComponent and DragAndDropWrapper

Change-Id: Ib640e5ea97bccffb889d3213a4f588b828fb07bf

server/src/main/java/com/vaadin/ui/CustomComponent.java

@@ -19,6 +19,8 @@ package com.vaadin.ui;
 import java.util.Collections;
 import java.util.Iterator;
 
+import com.vaadin.shared.customcomponent.CustomComponentState;
+
 /**
  * Custom component provides a simple implementation of the {@link Component}
  * interface to allow creating new UI components by composition of existing
@@ -147,4 +149,14 @@ public class CustomComponent extends AbstractComponent
         return (root != null ? 1 : 0);
     }
 
+    @Override
+    protected CustomComponentState getState() {
+        return (CustomComponentState) super.getState();
+    }
+
+    @Override
+    protected CustomComponentState getState(boolean markAsDirty) {
+        return (CustomComponentState) super.getState(markAsDirty);
+    }
+
 }

server/src/main/java/com/vaadin/ui/DragAndDropWrapper.java

@@ -41,6 +41,7 @@ import com.vaadin.shared.ui.dd.HorizontalDropLocation;
 import com.vaadin.shared.ui.dd.VerticalDropLocation;
 import com.vaadin.shared.ui.draganddropwrapper.DragAndDropWrapperConstants;
 import com.vaadin.shared.ui.draganddropwrapper.DragAndDropWrapperServerRpc;
+import com.vaadin.shared.ui.draganddropwrapper.DragAndDropWrapperState;
 import com.vaadin.ui.declarative.DesignContext;
 
 @SuppressWarnings("serial")
@@ -502,4 +503,14 @@ public class DragAndDropWrapper extends CustomComponent
             design.appendChild(child);
         }
     }
+
+    @Override
+    protected DragAndDropWrapperState getState() {
+        return (DragAndDropWrapperState) super.getState();
+    }
+
+    @Override
+    protected DragAndDropWrapperState getState(boolean markAsDirty) {
+        return (DragAndDropWrapperState) super.getState(markAsDirty);
+    }
 }

shared/src/main/java/com/vaadin/shared/customcomponent/CustomComponentState.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2000-2016 Vaadin Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.vaadin.shared.customcomponent;
+
+import com.vaadin.shared.AbstractComponentState;
+
+/**
+ * Shared state for CustomComponent.
+ *
+ * @author Vaadin Ltd
+ * @since 8.0
+ */
+public class CustomComponentState extends AbstractComponentState {
+}

shared/src/main/java/com/vaadin/shared/ui/draganddropwrapper/DragAndDropWrapperState.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2000-2016 Vaadin Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.vaadin.shared.ui.draganddropwrapper;
+
+import com.vaadin.shared.customcomponent.CustomComponentState;
+
+/**
+ * Shared state for DragAndDropWrapper.
+ *
+ * @author Vaadin Ltd
+ * @since 8.0
+ */
+public class DragAndDropWrapperState extends CustomComponentState {
+}