SLING-4554 - Support for OSGi-services in data-sly-use

* if the resolved class is an OSGi service return the service's instance

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1700816 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/main/java/org/apache/sling/scripting/sightly/testing/use/TestService.java b/src/main/java/org/apache/sling/scripting/sightly/testing/use/TestService.java
new file mode 100644
index 0000000..5f6a6e2
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/sightly/testing/use/TestService.java
@@ -0,0 +1,23 @@
+/*******************************************************************************
+ * 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.sling.scripting.sightly.testing.use;
+
+public interface TestService {
+
+    String sayHello();
+
+}
diff --git a/src/main/java/org/apache/sling/scripting/sightly/testing/use/impl/TestServiceImpl.java b/src/main/java/org/apache/sling/scripting/sightly/testing/use/impl/TestServiceImpl.java
new file mode 100644
index 0000000..acc037f
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/sightly/testing/use/impl/TestServiceImpl.java
@@ -0,0 +1,31 @@
+/*******************************************************************************
+ * 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.sling.scripting.sightly.testing.use.impl;
+
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Service;
+import org.apache.sling.scripting.sightly.testing.use.TestService;
+
+@Component
+@Service(TestService.class)
+public class TestServiceImpl implements TestService {
+
+    @Override
+    public String sayHello() {
+        return "Hello World!";
+    }
+}
diff --git a/src/main/resources/SLING-INF/apps/sightly/scripts/use/use.html b/src/main/resources/SLING-INF/apps/sightly/scripts/use/use.html
index 6efc1d8..b80eb37 100644
--- a/src/main/resources/SLING-INF/apps/sightly/scripts/use/use.html
+++ b/src/main/resources/SLING-INF/apps/sightly/scripts/use/use.html
@@ -28,5 +28,6 @@
              data-sly-use.reqadapt="org.apache.sling.scripting.sightly.testing.adaptable.RequestAdapterUseObject">${reqadapt.title}</div>
         <div id="resadapt"
              data-sly-use.resadapt="org.apache.sling.scripting.sightly.testing.adaptable.ResourceAdapterUseObject">${resadapt.title}</div>
+        <div id="osgi" data-sly-use.osgi="org.apache.sling.scripting.sightly.testing.use.TestService">${osgi.sayHello}</div>
     </body>
 </html>
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