Restructuring the form of REST API deployment to provide
for security of app's REST APIs and for consistency of
exception mappers and JSON writer.

Change-Id: Id318372bf62f82ed974355c05e7fe64e0fbfc0c5
diff --git a/utils/rest/src/main/java/org/onlab/rest/AbstractWebApplication.java b/utils/rest/src/main/java/org/onlab/rest/AbstractWebApplication.java
new file mode 100644
index 0000000..5d6b06d
--- /dev/null
+++ b/utils/rest/src/main/java/org/onlab/rest/AbstractWebApplication.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2014-2015 Open Networking Laboratory
+ *
+ * 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.onlab.rest;
+
+import com.google.common.collect.ImmutableSet;
+import org.onlab.rest.exceptions.BadRequestMapper;
+import org.onlab.rest.exceptions.EntityNotFoundMapper;
+import org.onlab.rest.exceptions.IllegalArgumentExceptionMapper;
+import org.onlab.rest.exceptions.IllegalStateExceptionMapper;
+import org.onlab.rest.exceptions.NotFoundMapper;
+import org.onlab.rest.exceptions.ServerErrorMapper;
+import org.onlab.rest.exceptions.ServiceNotFoundMapper;
+import org.onlab.rest.exceptions.WebApplicationExceptionMapper;
+
+import javax.ws.rs.core.Application;
+import java.util.Set;
+
+/**
+ * Base web application.
+ */
+public abstract class AbstractWebApplication extends Application {
+
+    /**
+     * Returns the aggregate set of resources, writers and mappers combined
+     * with a default set of such web entities.
+     *
+     * @param classes set of resources, writers and mappers
+     * @return combined set of web entities
+     */
+    protected Set<Class<?>> getClasses(Class<?>... classes) {
+        ImmutableSet.Builder<Class<?>> builder = ImmutableSet.builder();
+        builder.add(ServiceNotFoundMapper.class,
+                    EntityNotFoundMapper.class,
+                    NotFoundMapper.class,
+                    ServerErrorMapper.class,
+                    BadRequestMapper.class,
+                    WebApplicationExceptionMapper.class,
+                    IllegalArgumentExceptionMapper.class,
+                    IllegalStateExceptionMapper.class,
+                    JsonBodyWriter.class);
+        builder.add(classes);
+        return builder.build();
+    }
+
+    @Override
+    public abstract Set<Class<?>> getClasses();
+
+}