1 files changed, 64 insertions, 0 deletions
diff --git a/tags/java/sca/1.5.1/modules/extension-helper/src/main/java/org/apache/tuscany/sca/extension/helper/ImplementationActivator.java b/tags/java/sca/1.5.1/modules/extension-helper/src/main/java/org/apache/tuscany/sca/extension/helper/ImplementationActivator.java
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index 0000000000..7d2a9c3d2d
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+++ b/tags/java/sca/1.5.1/modules/extension-helper/src/main/java/org/apache/tuscany/sca/extension/helper/ImplementationActivator.java
@@ -0,0 +1,64 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 org.apache.tuscany.sca.extension.helper;
+
+import org.apache.tuscany.sca.assembly.ComponentType;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+
+/**
+ * An ImplementationActivator adds an SCA implementation type to the Tuscany runtime.
+ * 
+ * The SCDL XML used for the implementation is derived from the name of the
+ * class returned from the getImplementationClass method - the package name and
+ * any trailing "Implementation" string is removed, leading upper case characters
+ * are converted to lowercase, and the suffix "implementation." is added. For 
+ * example if getImplementationClass returns a class named "mypkg.FooImplementation"
+ * then the SCDL for the implementation will be <implementation.foo>.
+ * 
+ * Attributes of the <implementation.foo> SCDL are based on the getters/setters of
+ * the Implementation class. So if FooImplementation had getBar/setBar then there
+ * would be an attribute name 'bar', for example, <implementation.foo bar="xxx">. 
+ * 
+ * BindingActivator implementations may use constructor arguments to have 
+ * Tuscany ExtensionPointRegistry objects passed in on their constructor.
+ * For example:
+ * 
+ *    public class MyImplementationActivator implements ImplementationActivator {
+ *       ServletHost servletHost;
+ *       public MyImplementationActivator(ServletHost servletHost) {
+ *          this.servletHost = servletHost;
+ *       }
+ *       ...
+ *    }
+ *    
+ * ImplementationActivator implementations are discovered by the Tuscany runtime
+ * using the J2SE jar file extensions for service provider discovery. All
+ * that means is packaging the new binding type in a jar which contains a  
+ * file META-INF/services/org.apache.tuscany.sca.extension.helper.ImplementationActivator and
+ * that file lists the ImplementationActivator implementation class name.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface ImplementationActivator<T> {
+
+    Class<T> getImplementationClass();
+
+    InvokerFactory createInvokerFactory(RuntimeComponent rc, ComponentType ct, T implementation);
+}