[ONOS-6348] Intent installer redesign

Change-Id: I9ae2e8158dc1c686eaf848f330566f9dbb78405f
diff --git a/core/api/src/main/java/org/onosproject/net/intent/IntentInstaller.java b/core/api/src/main/java/org/onosproject/net/intent/IntentInstaller.java
new file mode 100644
index 0000000..ac41865
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/intent/IntentInstaller.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2017-present 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.onosproject.net.intent;
+
+/**
+ * Manage installation process for specific installable Intents.
+ */
+public interface IntentInstaller<T extends Intent> {
+
+    /**
+     * The installation direction.
+     */
+    enum Direction {
+        /**
+         * Direction for adding any installable objects(flows, configs...).
+         */
+        ADD,
+
+        /**
+         * Direction for removing any installable objects(flows, configs...).
+         */
+        REMOVE
+    }
+
+    /**
+     * Applies an Intent operation context.
+     *
+     * @param context the Intent operation context
+     */
+    void apply(IntentOperationContext<T> context);
+}