Add constructor for directly extending a connector (#13579)

Change-Id: Id8ba60cf8767ba171a5bcbd5541d8c0c7a9fa62d

2 files changed, 41 insertions, 0 deletions

diff --git a/server/src/com/vaadin/server/AbstractExtension.java b/server/src/com/vaadin/server/AbstractExtension.java
index 7148e6e84c..6395daebd1 100644
--- a/server/src/com/vaadin/server/AbstractExtension.java
+++ b/server/src/com/vaadin/server/AbstractExtension.java
@@ -36,6 +36,26 @@ public abstract class AbstractExtension extends AbstractClientConnector
     private ClientConnector parent;
 
     /**
+     * Creates a new extension instance without extending any connector.
+     */
+    public AbstractExtension() {
+        // Empty default constructor
+    }
+
+    /**
+     * Creates a new extension instance that extends the provided connector.
+     * 
+     * @since
+     * 
+     * @param target
+     *            the connector to extend
+     */
+    public AbstractExtension(AbstractClientConnector target) {
+        this();
+        extend(target);
+    }
+
+    /**
      * Gets a type that the parent must be an instance of. Override this if the
      * extension only support certain targets, e.g. if only TextFields can be
      * extended.
diff --git a/server/src/com/vaadin/server/AbstractJavaScriptExtension.java b/server/src/com/vaadin/server/AbstractJavaScriptExtension.java
index 410eea3c01..2f2752c317 100644
--- a/server/src/com/vaadin/server/AbstractJavaScriptExtension.java
+++ b/server/src/com/vaadin/server/AbstractJavaScriptExtension.java
@@ -127,6 +127,27 @@ public abstract class AbstractJavaScriptExtension extends AbstractExtension {
     private JavaScriptCallbackHelper callbackHelper = new JavaScriptCallbackHelper(
             this);
 
+    /**
+     * Creates a new JavasScript extension instance without extending any
+     * connector.
+     */
+    public AbstractJavaScriptExtension() {
+        // Empty default constructor
+    }
+
+    /**
+     * Creates a new JavaScript extension extending the provided connector.
+     * 
+     * @since
+     * 
+     * @param target
+     *            the connector to extend
+     */
+    public AbstractJavaScriptExtension(AbstractClientConnector target) {
+        this();
+        extend(target);
+    }
+
     @Override
     protected <T extends ServerRpc> void registerRpc(T implementation,
             Class<T> rpcInterfaceType) {