> For the complete documentation index, see [llms.txt](https://docs.ic4j.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ic4j.com/reference/api-reference/object-serializers-and-deserializers.md).

# Object Serializers and Deserializers

To handle complex Candid types RECORD and VARIANT IC4J use custom [ObjectSerializer](https://github.com/ic4j/ic4j-candid/blob/master/src/main/java/org/ic4j/candid/ObjectSerializer.java) and [ObjectDeserializer](https://github.com/ic4j/ic4j-candid/blob/master/src/main/java/org/ic4j/candid/ObjectDeserializer.java) implementations. 

If required, developers can design their own serializers and deserializers. 

The IC4J library comes with several implementations of the most common scenarios (Java Pojo, JSON, XML, JDBC).

Use Pojo Serializer and Deserializer to handle plain Java objects.

{% content-ref url="/pages/fFNdna5rDbxBelXg2vGd" %}
[Pojo Serializer and Deserializer](/reference/api-reference/object-serializers-and-deserializers/pojo-serializer-and-deserializer.md)
{% endcontent-ref %}

Use JSON Jackson Serializer and Deserializer to handle Jackson JSON objects.

{% content-ref url="/pages/2yGa1TAtAoxqCEOpzw9R" %}
[JSON Jackson Serializer and Deserializer](/reference/api-reference/object-serializers-and-deserializers/json-jackson-serializer-and-deserializer.md)
{% endcontent-ref %}

Use JSON Gson Serializer and Deserializer to handle Gson JSON objects.

{% content-ref url="/pages/2XTHGvZupk7G1Xd291DM" %}
[JSON Gson Serializer and Deserializer](/reference/api-reference/object-serializers-and-deserializers/json-gson-serializer-and-deserializer.md)
{% endcontent-ref %}

Use XML Serializer and Deserializer to handle XML DOM objects.

{% content-ref url="/pages/3XU4Sv1egy2hcws2k5pC" %}
[XML DOM Serializer and Deserializer](/reference/api-reference/object-serializers-and-deserializers/xml-dom-serializer-and-deserializer.md)
{% endcontent-ref %}

Use JDBC Serializer to handle JDBC objects.

{% content-ref url="/pages/GKY4zfZwzNNievUtS6Vz" %}
[JDBC Serializer](/reference/api-reference/object-serializers-and-deserializers/jdbc-serializer.md)
{% endcontent-ref %}