Sketching out basis for network configuration subsystem API.
Change-Id: I9d56a8392bd300566fb333607102cc965b2fa66e
diff --git a/exp/api/src/main/java/org/onosproject/exp/net/config/Config.java b/exp/api/src/main/java/org/onosproject/exp/net/config/Config.java
new file mode 100644
index 0000000..2423de5
--- /dev/null
+++ b/exp/api/src/main/java/org/onosproject/exp/net/config/Config.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright 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.onosproject.exp.net.config;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Base abstraction of a configuration facade for a specific subject. Derived
+ * classes should keep all state in the specified JSON tree.
+ *
+ * @param <S> type of subject
+ */
+public abstract class Config<S> {
+
+ protected ObjectMapper mapper;
+ protected ObjectNode node;
+ private S subject;
+ private ConfigApplyDelegate<S> delegate;
+
+ /**
+ * Returns the specific subject to which this configuration pertains.
+ *
+ * @return configuration subject
+ */
+ S subject() {
+ return subject;
+ }
+
+ /**
+ * Initializes the configuration behaviour with necessary context.
+ *
+ * @param subject configuration subject
+ * @param node JSON object node where configuration data is stored
+ * @param mapper JSON object mapper
+ */
+ public void init(S subject, ObjectNode node, ObjectMapper mapper,
+ ConfigApplyDelegate<S> delegate) {
+ this.subject = checkNotNull(subject);
+ this.node = checkNotNull(node);
+ this.mapper = checkNotNull(mapper);
+ this.delegate = checkNotNull(delegate);
+ }
+
+ /**
+ * Applies any configuration changes made via this configuration.
+ */
+ public void apply() {
+ delegate.onApply(this);
+ }
+
+}