1 files changed, 49 insertions, 0 deletions
diff --git a/framework/src/onos/core/api/src/main/java/org/onosproject/net/AbstractDescription.java b/framework/src/onos/core/api/src/main/java/org/onosproject/net/AbstractDescription.java
new file mode 100644
index 00000000..d81b83cc
--- /dev/null
+++ b/framework/src/onos/core/api/src/main/java/org/onosproject/net/AbstractDescription.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2014 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;
+
+import static com.google.common.base.Preconditions.checkArgument;
+
+/**
+ * Base implementation of an annotated model description.
+ */
+public abstract class AbstractDescription implements Annotated {
+
+    private static final SparseAnnotations EMPTY = DefaultAnnotations.builder().build();
+
+    private final SparseAnnotations annotations;
+
+    // For serialization
+    protected AbstractDescription() {
+        this.annotations = null;
+    }
+
+    /**
+     * Creates a new entity, annotated with the specified annotations.
+     *
+     * @param annotations optional key/value annotations map
+     */
+    protected AbstractDescription(SparseAnnotations... annotations) {
+        checkArgument(annotations.length <= 1, "Only one set of annotations is expected");
+        this.annotations = annotations.length == 1 ? annotations[0] : EMPTY;
+    }
+
+    @Override
+    public SparseAnnotations annotations() {
+        return annotations;
+    }
+
+}