#5890 Added getComponentCount to ComponentContainer

src/com/vaadin/ui/ComponentContainer.java

@@ -69,6 +69,14 @@ public interface ComponentContainer extends Component {
      */
     public Iterator<Component> getComponentIterator();
 
+    /**
+     * Gets the number of children this {@link ComponentContainer} has. This
+     * must be symmetric with what {@link #getComponentIterator()} returns.
+     * 
+     * @return The number of child components this container has.
+     */
+    public int getComponentCount();
+
     /**
      * Causes a repaint of this component, and all components below it.
      * 

src/com/vaadin/ui/Panel.java

@@ -661,4 +661,13 @@ public class Panel extends AbstractComponentContainer implements Scrollable,
         super.focus();
     }
 
+    /*
+     * (non-Javadoc)
+     * 
+     * @see com.vaadin.ui.ComponentContainer#getComponentCount()
+     */
+    public int getComponentCount() {
+        // This is so wrong... (#2924)
+        return content.getComponentCount();
+    }
 }

src/com/vaadin/ui/Root.java

@@ -632,10 +632,24 @@ public abstract class Root extends AbstractComponentContainer implements
         }
     }
 
+    /*
+     * (non-Javadoc)
+     * 
+     * @see com.vaadin.ui.ComponentContainer#getComponentIterator()
+     */
     public Iterator<Component> getComponentIterator() {
         return Collections.singleton((Component) getContent()).iterator();
     }
 
+    /*
+     * (non-Javadoc)
+     * 
+     * @see com.vaadin.ui.ComponentContainer#getComponentCount()
+     */
+    public int getComponentCount() {
+        return getContent() == null ? 0 : 1;
+    }
+
     /**
      * Sets the application to which this root is assigned. It is not legal to
      * change the application once it has been set nor to set a