+{"input": {"source_code": "@SuppressWarnings(\"unchecked\")\npublic static Map<String, String> deserializeOffsetMap(String lastSourceOffset) throws IOException {\n Map<String, String> offsetMap;\n if (lastSourceOffset == null || lastSourceOffset.isEmpty()) { \n offsetMap = new HashMap<>(); \n } else {\n offsetMap = JSON_MAPPER.readValue(lastSourceOffset, Map.class); \n }\n return offsetMap;\n}\n", "repo_info": {"repo": "streamsets/datacollector", "path": "stagesupport/src/main/java/com/.../OffsetUtil.java", "function_name": "OffsetUtil.deserializeOffsetMap"}}, "output": "The provided Java code is a static method named `deserializeOffsetMap` within the `OffsetUtil` class in the StreamSets DataCollector repository's `stagesupport/src/main/java/com/` directory, specifically at `com.streamsets.datacollector.onprem.plugin.kafka.offset.OffsetUtil.java`. This method is designed to deserialize a JSON string containing offset information into a `Map<String, String>` object.\n\nHere's an explanation of the code:\n\n1. **Method Signature:**\n ```java\n @SuppressWarnings(\"unchecked\")\n public static Map<String, String> deserializeOffsetMap(String lastSourceOffset) throws IOException;\n ```\n - The method is declared as `public`, `static`, and returns a `Map<String, String>`.\n - It takes one parameter: `lastSourceOffset` of type `String`.\n - The method throws an `IOException`.\n\n2. **Null and Empty Check:**\n ```java\n if (lastSourceOffset == null || lastSourceOffset.isEmpty()) {\n offsetMap = new HashMap<>(); \n } else {\n // ...\n }\n ```\n - If the input string is either `null` or empty, a new `HashMap<String, String>` named `offsetMap` is created and assigned to it.\n\n3. **Deserialization:**\n ```java\n offsetMap = JSON_MAPPER.readValue(lastSourceOffset, Map.class);\n ```\n - If the input string isn't null or empty, the method uses a `JSON_MAPPER` object (assumed to be an instance of a JSON parser like Jackson's `ObjectMapper`) to deserialize it into a `Map<String, String>`. The `readValue()` function is called with two arguments:\n 1. The input string (`lastSourceOffset`).\n 2. A type argument `Map.class`, indicating that the method expects a map as output.\n\n4. **Return Statement:**\n ```java\n return offsetMap;\n ```\n - After processing, the deserialized or default-constructed `offsetMap` is returned.\n\nIn summary, this function takes a JSON string representing an offset map and returns it as a `Map<String, String>`. If no input string is provided (null or empty), it creates a new empty map; otherwise, it deserializes the given JSON string into a map using a JSON parser. The `@SuppressWarnings(\"unchecked\")` annotation warns about potential unchecked casts in the code but doesn't affect its functionality since `Map<String, String>` is a known type.", "metric": 0.19340463458110513}
0 commit comments