[ONOS-3885, ONOS-3886, ONOS-3887] Implement YANG sub-module, container and list data model
Change-Id: Id9be89054db0f4c4f84e62547d3b6851cfed3de2
diff --git a/src/main/java/org/onosproject/yangutils/utils/io/CachedFileHandle.java b/src/main/java/org/onosproject/yangutils/utils/io/CachedFileHandle.java
new file mode 100644
index 0000000..1327e12
--- /dev/null
+++ b/src/main/java/org/onosproject/yangutils/utils/io/CachedFileHandle.java
@@ -0,0 +1,39 @@
+/*Copyright 2016.year 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.yangutils.utils.io;
+
+import org.onosproject.yangutils.translator.GeneratedFileType;
+
+/**
+ * Cached java file handle, which supports the addition of member attributes and
+ * methods.
+ */
+public interface CachedFileHandle {
+
+ /**
+ * Add a new attribute to the file(s).
+ *
+ * @param attrType data type of the added attribute.
+ * @param name name of the attribute.
+ * @param isListAttr if the current added attribute needs to be maintained
+ * in a list.
+ * @param fileTypes types of files in which the attribute needs to be added.
+ */
+ void addAttributeInfo(String attrType, String name, boolean isListAttr, GeneratedFileType fileTypes);
+
+ /**
+ * Flushes the cached contents to the target file, frees used resources.
+ */
+ void close();
+}