1 files changed, 66 insertions, 0 deletions
diff --git a/infra/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/MappingContext.java b/infra/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/MappingContext.java
new file mode 100644
index 000000000..cff766e2a
--- /dev/null
+++ b/infra/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/MappingContext.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * 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 io.fd.honeycomb.v3po.translate;
+
+import com.google.common.base.Optional;
+import javax.annotation.Nonnull;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * Mapping context is persisted storage where mapping matadata are stored.
+ * A snapshot is created for each transaction to provide consistent view over context data.
+ * After a transaction is successfully finished, objects added to this context are propagated to backing storage.
+ */
+public interface MappingContext extends AutoCloseable {
+
+    /**
+     * Read any mapping context data
+     *
+     * @param currentId Id of an object to read
+     *
+     * @return Relevant mapping context data
+     */
+    <T extends DataObject> Optional<T> read(@Nonnull final InstanceIdentifier<T> currentId);
+
+    /**
+     * Delete the node at specified path.
+     *
+     * @param path Node path
+     */
+    void delete(InstanceIdentifier<?> path);
+
+    /**
+     * Merge the specified data with the currently-present data
+     * at specified path.
+     *
+     * @param path Node path
+     * @param data Data to be merged
+     */
+    <T extends DataObject> void merge(InstanceIdentifier<T> path, T data);
+
+    /**
+     * Replace the data at specified path with supplied data.
+     *
+     * @param path Node path
+     * @param data New node data
+     */
+    <T extends DataObject> void put(InstanceIdentifier<T> path, T data);
+
+    @Override
+    void close();
+}