1 files changed, 80 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/binding-rest-runtime/src/main/java/org/apache/tuscany/sca/binding/rest/provider/JAXRSHelper.java b/sca-java-2.x/tags/2.0.1-RC1/modules/binding-rest-runtime/src/main/java/org/apache/tuscany/sca/binding/rest/provider/JAXRSHelper.java
new file mode 100644
index 0000000000..2bf95f0677
--- /dev/null
+++ b/sca-java-2.x/tags/2.0.1-RC1/modules/binding-rest-runtime/src/main/java/org/apache/tuscany/sca/binding/rest/provider/JAXRSHelper.java
@@ -0,0 +1,80 @@
+/*
+ * 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.binding.rest.provider;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Method;
+
+import javax.ws.rs.HttpMethod;
+import javax.ws.rs.Path;
+
+/**
+ * A utility class that deals with JAX-RS annotations
+ */
+public class JAXRSHelper {
+    private JAXRSHelper() {
+
+    }
+
+    /**
+     * A resource class is a Java class that uses JAX-RS annotations to implement a corresponding Web resource.
+     * Resource classes are POJOs that have at least one method annotated with @Path or a request method designator.
+     * @param cls
+     * @return
+     */
+    public static boolean isJAXRSResource(Class<?> cls) {
+        for (Method method : cls.getMethods()) {
+            if (method.isAnnotationPresent(Path.class)) {
+                return true;
+            }
+            if (isResourceMethod(method)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Root resource class is a resource class annotated with @Path. Root resource classes provide the roots of the
+     * resource class tree and provide access to sub-resources
+     * @param cls
+     * @return
+     */
+    public static boolean isJAXRSRootResource(Class<?> cls) {
+        return cls.isAnnotationPresent(Path.class) && isJAXRSResource(cls);
+    }
+
+    public static boolean isResourceMethod(Method method) {
+        for (Annotation a : method.getAnnotations()) {
+            Class<?> annotationType = a.annotationType();
+            if (annotationType == HttpMethod.class) {
+                return true;
+            }
+            // Http method related annotations such as @GET, @POST will have itself annotated with
+            // @HttpMethod
+            HttpMethod m = a.annotationType().getAnnotation(HttpMethod.class);
+            if (m != null) {
+                return true;
+            }
+        }
+        return false;
+
+    }
+}