Use class references instead of class names for AcceptCriterion (#8641)

src/com/vaadin/terminal/gwt/client/ui/dd/AcceptCriterion.java

 @Target(ElementType.TYPE)
 public @interface AcceptCriterion {
     /**
-     * @return the fully qualified class name of the server side counterpart for
-     *         the annotated criterion
+     * @return the class of the server side counterpart for the annotated
+     *         criterion
      */
-    String value();
+    Class<?> value();
 
 }

src/com/vaadin/terminal/gwt/client/ui/dd/VAcceptAll.java

  */
 package com.vaadin.terminal.gwt.client.ui.dd;
 
+import com.vaadin.event.dd.acceptcriteria.AcceptAll;
 import com.vaadin.terminal.gwt.client.UIDL;
 
-@AcceptCriterion("com.vaadin.event.dd.acceptcriteria.AcceptAll")
+@AcceptCriterion(AcceptAll.class)
 final public class VAcceptAll extends VAcceptCriterion {
 
     @Override

src/com/vaadin/terminal/gwt/client/ui/dd/VAnd.java

  */
 package com.vaadin.terminal.gwt.client.ui.dd;
 
+import com.vaadin.event.dd.acceptcriteria.And;
 import com.vaadin.terminal.gwt.client.UIDL;
 
-@AcceptCriterion("com.vaadin.event.dd.acceptcriteria.And")
+@AcceptCriterion(And.class)
 final public class VAnd extends VAcceptCriterion implements VAcceptCallback {
     private boolean b1;
 

src/com/vaadin/terminal/gwt/client/ui/dd/VContainsDataFlavor.java

  */
 package com.vaadin.terminal.gwt.client.ui.dd;
 
+import com.vaadin.event.dd.acceptcriteria.ContainsDataFlavor;
 import com.vaadin.terminal.gwt.client.UIDL;
 
-@AcceptCriterion("com.vaadin.event.dd.acceptcriteria.ContainsDataFlavor")
+@AcceptCriterion(ContainsDataFlavor.class)
 final public class VContainsDataFlavor extends VAcceptCriterion {
 
     @Override

src/com/vaadin/terminal/gwt/client/ui/dd/VDragSourceIs.java

  */
 package com.vaadin.terminal.gwt.client.ui.dd;
 
+import com.vaadin.event.dd.acceptcriteria.SourceIs;
 import com.vaadin.terminal.gwt.client.ComponentConnector;
 import com.vaadin.terminal.gwt.client.ConnectorMap;
 import com.vaadin.terminal.gwt.client.UIDL;
  * 
  * @since 6.3
  */
-@AcceptCriterion("com.vaadin.event.dd.acceptcriteria.SourceIs")
+@AcceptCriterion(SourceIs.class)
 final public class VDragSourceIs extends VAcceptCriterion {
 
     @Override

src/com/vaadin/terminal/gwt/client/ui/dd/VIsOverId.java

 import com.vaadin.terminal.gwt.client.ComponentConnector;
 import com.vaadin.terminal.gwt.client.ConnectorMap;
 import com.vaadin.terminal.gwt.client.UIDL;
+import com.vaadin.ui.AbstractSelect;
 
-@AcceptCriterion("com.vaadin.ui.AbstractSelect.TargetItemIs")
+@AcceptCriterion(AbstractSelect.TargetItemIs.class)
 final public class VIsOverId extends VAcceptCriterion {
 
     @Override

src/com/vaadin/terminal/gwt/client/ui/dd/VItemIdIs.java

 
 import com.vaadin.terminal.gwt.client.ComponentConnector;
 import com.vaadin.terminal.gwt.client.UIDL;
+import com.vaadin.ui.AbstractSelect;
 
-@AcceptCriterion("com.vaadin.ui.AbstractSelect.AcceptItem")
+@AcceptCriterion(AbstractSelect.AcceptItem.class)
 final public class VItemIdIs extends VAcceptCriterion {
 
     @Override

src/com/vaadin/terminal/gwt/client/ui/dd/VLazyInitItemIdentifiers.java

 import java.util.HashSet;
 
 import com.vaadin.terminal.gwt.client.UIDL;
+import com.vaadin.ui.Table;
+import com.vaadin.ui.Tree;
 
 /**
  * 
     private HashSet<String> hashSet;
     private VDragEvent lastDragEvent;
 
-    @AcceptCriterion("com.vaadin.ui.Table.TableDropCriterion")
+    @AcceptCriterion(Table.TableDropCriterion.class)
     final public static class VTableLazyInitItemIdentifiers extends
             VLazyInitItemIdentifiers {
         // all logic in superclass
     }
 
-    @AcceptCriterion("com.vaadin.ui.Tree.TreeDropCriterion")
+    @AcceptCriterion(Tree.TreeDropCriterion.class)
     final public static class VTreeLazyInitItemIdentifiers extends
             VLazyInitItemIdentifiers {
         // all logic in superclass

src/com/vaadin/terminal/gwt/client/ui/dd/VNot.java

  */
 package com.vaadin.terminal.gwt.client.ui.dd;
 
+import com.vaadin.event.dd.acceptcriteria.Not;
 import com.vaadin.terminal.gwt.client.UIDL;
 import com.vaadin.terminal.gwt.client.VConsole;
 
  * TODO implementation could now be simplified/optimized
  * 
  */
-@AcceptCriterion("com.vaadin.event.dd.acceptcriteria.Not")
+@AcceptCriterion(Not.class)
 final public class VNot extends VAcceptCriterion {
     private boolean b1;
     private VAcceptCriterion crit1;

src/com/vaadin/terminal/gwt/client/ui/dd/VOr.java

  */
 package com.vaadin.terminal.gwt.client.ui.dd;
 
+import com.vaadin.event.dd.acceptcriteria.Or;
 import com.vaadin.terminal.gwt.client.UIDL;
 
 /**
  * 
  */
-@AcceptCriterion("com.vaadin.event.dd.acceptcriteria.Or")
+@AcceptCriterion(Or.class)
 final public class VOr extends VAcceptCriterion implements VAcceptCallback {
     private boolean accepted;
 

src/com/vaadin/terminal/gwt/client/ui/dd/VServerAccept.java

  */
 package com.vaadin.terminal.gwt.client.ui.dd;
 
+import com.vaadin.event.dd.acceptcriteria.ServerSideCriterion;
 import com.vaadin.terminal.gwt.client.UIDL;
 
-@AcceptCriterion("com.vaadin.event.dd.acceptcriteria.ServerSideCriterion")
+@AcceptCriterion(ServerSideCriterion.class)
 final public class VServerAccept extends VAcceptCriterion {
     @Override
     public void accept(final VDragEvent drag, UIDL configuration,

src/com/vaadin/terminal/gwt/client/ui/dd/VSourceIsTarget.java

  */
 package com.vaadin.terminal.gwt.client.ui.dd;
 
+import com.vaadin.event.dd.acceptcriteria.SourceIsTarget;
 import com.vaadin.terminal.gwt.client.ComponentConnector;
 import com.vaadin.terminal.gwt.client.UIDL;
 
-@AcceptCriterion("com.vaadin.event.dd.acceptcriteria.SourceIsTarget")
+@AcceptCriterion(SourceIsTarget.class)
 final public class VSourceIsTarget extends VAcceptCriterion {
 
     @Override

src/com/vaadin/terminal/gwt/client/ui/dd/VTargetDetailIs.java

  */
 package com.vaadin.terminal.gwt.client.ui.dd;
 
+import com.vaadin.event.dd.acceptcriteria.TargetDetailIs;
 import com.vaadin.terminal.gwt.client.UIDL;
 
-@AcceptCriterion("com.vaadin.event.dd.acceptcriteria.TargetDetailIs")
+@AcceptCriterion(TargetDetailIs.class)
 final public class VTargetDetailIs extends VAcceptCriterion {
 
     @Override

src/com/vaadin/terminal/gwt/client/ui/dd/VTargetInSubtree.java

 import com.vaadin.terminal.gwt.client.UIDL;
 import com.vaadin.terminal.gwt.client.ui.tree.VTree;
 import com.vaadin.terminal.gwt.client.ui.tree.VTree.TreeNode;
+import com.vaadin.ui.Tree;
 
-@AcceptCriterion("com.vaadin.ui.Tree.TargetInSubtree")
+@AcceptCriterion(Tree.TargetInSubtree.class)
 final public class VTargetInSubtree extends VAcceptCriterion {
 
     @Override

src/com/vaadin/terminal/gwt/widgetsetutils/AcceptCriteriaFactoryGenerator.java

                     .getAnnotation(AcceptCriterion.class);
             if (annotation != null) {
                 String clientClassName = clientClass.getQualifiedSourceName();
-                String serverClassName = clientClass.getAnnotation(
+                Class<?> serverClass = clientClass.getAnnotation(
                         AcceptCriterion.class).value();
+                String serverClassName = serverClass.getCanonicalName();
                 logger.log(Type.INFO, "creating mapping for " + serverClassName);
                 sourceWriter.print("if (\"");
                 sourceWriter.print(serverClassName);
         sourceWriter.outdent();
         sourceWriter.println("}");
     }
-
 }