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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"JsonObject deserialisation","articleBody":"I am  using JsonReader to read json bytes to JsonObject. What is the equivalent for msgpack?\nBelow is the code we are using for desrialising json to JsonObject.\n```\nJsonReader jsonReader = Json.createReader(content);\n            object =  jsonReader.readObject();\n            jsonReader.close();\n```\n\nFor deserialising JsonObject msgpack bytes to JsonObject in java, I have tried ObjectMapper, but it fails with \n\n```com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot find a deserializer for non-concrete Map type [map type; class jakarta.json.JsonObject, [simple type, class java.lang.String] -\u003e [simple type, class jakarta.json.JsonValue]]```\n\nBelow is the sample i have tried, which produces above error. What is the right way to deserialise a JsonObject in msgpack? \n\n```\nString nodeInfo = \"{\\n\" +\n        \"\\t\\\"nodeType\\\": \\\"directory\\\"\\n\" +\n        \"}\";\n    \n    // Create JsonObject from nodeInfo string\n    JsonObject node;\n    try (jakarta.json.JsonReader jsonReader = jakarta.json.Json.createReader(new ByteArrayInputStream(nodeInfo.getBytes(StandardCharsets.UTF_8)))) {\n        node = jsonReader.readObject();\n    }\n\n    // Create MessagePack data\n    ObjectMapper msgpackMapper = new ObjectMapper(new MessagePackFactory());\n    byte[] bytes = msgpackMapper.writeValueAsBytes(node);\n```\n\nFrom https://github.com/msgpack/msgpack-java/issues/465#issuecomment-1695827215, it looks like with ObjectMapper, JsonObject deserialisation used to work before. But it does not work now. Could you please suggest a solution?\n\nVersions used: \njackson version - 2.15.3\nmsgpack version - 0.9.7","author":{"url":"https://github.com/ashj11","@type":"Person","name":"ashj11"},"datePublished":"2025-04-02T08:55:34.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/883/msgpack-java/issues/883"}