Github user chandnisingh commented on a diff in the pull request:
https://github.com/apache/incubator-apex-malhar/pull/232#discussion_r58658808
--- Diff:
library/src/main/java/org/apache/apex/malhar/lib/spillable/Serde.java ---
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2016 Apache Software Foundation.
+ *
+ * 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.apache.apex.malhar.lib.spillable;
+
+import org.apache.commons.lang3.mutable.MutableInt;
+
+/**
+ * This is an interface for a Serializer/Deserializer class.
+ * @param <OBJ> The type of the object to Serialize and Deserialize.
+ * @param <SER> The type to Serialize an Object to.
+ */
+public interface Serde<OBJ, SER>
+{
+ /**
+ * Serialized the given object.
+ * @param object The object to serialize.
+ * @return The serialized representation of the object.
+ */
+ public SER serializeObject(OBJ object);
+
+ /**
+ * Deserializes the given serialized representation of an object.
+ * @param object The serialized representation of an object.
+ * @param offset An offset in the serialized reprsentation of the object.
+ * @return The deserialized object.
+ */
+ public OBJ deserializeObject(SER object, MutableInt offset);
--- End diff --
if this eases the following as @ilooner mentioned
```
Object obj;
MutableInt mi;
someObj1 = deserialize(obj, mi);
someObj2 = deserialize(obj, mi);
So the implementation is expected to modify the offset, then this needs to
be documented.
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