1 files changed, 74 insertions, 0 deletions
diff --git a/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/DatabaseDefinitionStore.java b/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/DatabaseDefinitionStore.java
new file mode 100644
index 00000000..b77667b2
--- /dev/null
+++ b/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/DatabaseDefinitionStore.java
@@ -0,0 +1,74 @@
+/*
+ * 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.store.consistent.impl;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import java.io.File;
+import java.io.IOException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.io.Files;
+
+/**
+ * Allows for reading and writing partitioned database definition as a JSON file.
+ */
+public class DatabaseDefinitionStore {
+
+    private final File file;
+
+    /**
+     * Creates a reader/writer of the database definition file.
+     *
+     * @param filePath location of the definition file
+     */
+    public DatabaseDefinitionStore(String filePath) {
+        file = new File(checkNotNull(filePath));
+    }
+
+    /**
+     * Creates a reader/writer of the database definition file.
+     *
+     * @param filePath location of the definition file
+     */
+    public DatabaseDefinitionStore(File filePath) {
+        file = checkNotNull(filePath);
+    }
+
+    /**
+     * Returns the database definition.
+     *
+     * @return database definition
+     * @throws IOException when I/O exception of some sort has occurred.
+     */
+    public DatabaseDefinition read() throws IOException {
+        ObjectMapper mapper = new ObjectMapper();
+        return mapper.readValue(file, DatabaseDefinition.class);
+    }
+
+    /**
+     * Writes the specified database definition to file.
+     *
+     * @param definition database definition
+     * @throws IOException when I/O exception of some sort has occurred.
+     */
+    public void write(DatabaseDefinition definition) throws IOException {
+        checkNotNull(definition);
+        // write back to file
+        Files.createParentDirs(file);
+        ObjectMapper mapper = new ObjectMapper();
+        mapper.writeValue(file, definition);
+    }
+}