1 files changed, 48 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/java-M1-final/java/sca/common/src/main/java/org/apache/tuscany/common/monitor/impl/NullMonitorFactory.java b/sca-java-1.x/tags/java-M1-final/java/sca/common/src/main/java/org/apache/tuscany/common/monitor/impl/NullMonitorFactory.java
new file mode 100644
index 0000000000..827aeec84c
--- /dev/null
+++ b/sca-java-1.x/tags/java-M1-final/java/sca/common/src/main/java/org/apache/tuscany/common/monitor/impl/NullMonitorFactory.java
@@ -0,0 +1,48 @@
+/**
+ *
+ *  Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
+ *
+ *  Licensed 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.common.monitor.impl;
+
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.Method;
+import java.lang.reflect.Proxy;
+
+import org.apache.tuscany.common.monitor.MonitorFactory;
+
+/**
+ * Implementation of a {@link MonitorFactory} that produces implementations that simply return.
+ *
+ * @version $Rev$ $Date$
+ */
+public class NullMonitorFactory implements MonitorFactory {
+    public <T> T getMonitor(Class<T> monitorInterface) {
+        /*
+         * This uses a reflection proxy to implement the monitor interface which
+         * is a simple but perhaps not very performant solution. Performance
+         * might be improved by code generating an implementation with empty methods.
+         */
+        return monitorInterface.cast(Proxy.newProxyInstance(monitorInterface.getClassLoader(), new Class<?>[]{monitorInterface}, NULL_MONITOR));
+    }
+
+    /**
+     * Singleton wire hander that does nothing.
+     */
+    private static final InvocationHandler NULL_MONITOR = new InvocationHandler() {
+        public Object invoke(Object proxy, Method method, Object[] args) {
+            return null;
+        }
+    };
+}