CM-690 trait extension

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@117473 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
2025-10-08 14:51:49 +00:00 · 2015-11-12 18:57:10 +00:00
parent 511c7dbbb5
commit c0f5336745
27 changed files with 1992 additions and 0 deletions
--- a/source/java/org/alfresco/traitextender/InstanceExtensionFactory.java
+++ b/source/java/org/alfresco/traitextender/InstanceExtensionFactory.java
@@ -0,0 +1,70 @@
+/* 
+ * Copyright (C) 2005-2015 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see http://www.gnu.org/licenses/.
+ */
+
+package org.alfresco.traitextender;
+
+import java.lang.reflect.Constructor;
+
+public class InstanceExtensionFactory<I extends InstanceExtension<E, T>, T extends Trait, E> implements
+            ExtensionFactory<E>
+{
+    private Class<? extends I> extensionClass;
+
+    private Class<T> traitAPI;
+
+    public <C extends I> InstanceExtensionFactory(Class<C> extensionClass, Class<T> traitAPI,
+                Class<? extends E> extensionAPI)
+    {
+        super();
+        this.extensionClass = extensionClass;
+        this.traitAPI = traitAPI;
+
+        if (!extensionAPI.isAssignableFrom(extensionClass))
+        {
+            throw new InvalidExtension("Extension class " + extensionClass + " is incompatible with extensio API "
+                        + extensionAPI);
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public <TO extends Trait> E createExtension(TO traitObject)
+    {
+        try
+        {
+            // Trait RTTI will be performed anyway at Constructor#newInstance invocation time
+            T tTrait = (T) traitObject;
+
+            Constructor<? extends I> c = extensionClass.getConstructor(traitAPI);
+            return (E) c.newInstance(tTrait);
+        }
+        catch (Exception error)
+        {
+            throw new RuntimeException(error);
+        }
+    }
+
+    @Override
+    public boolean canCreateExtensionFor(ExtensionPoint<?, ?> point)
+    {
+        return point.getExtensionAPI().isAssignableFrom(extensionClass)
+                    && traitAPI.isAssignableFrom(point.getTraitAPI());
+    }
+
+}