UserType implementation for the Vert.x JsonObject class for use with Hibernate Reactive

JsonBinaryType.kt

import io.vertx.core.json.JsonObject
import org.hibernate.engine.spi.SharedSessionContractImplementor
import org.hibernate.usertype.UserType
import java.io.Serializable
import java.sql.PreparedStatement
import java.sql.ResultSet
import java.sql.Types
import java.util.*

/**
 * A UserType implementation for the Vert.x JsonObject class for use with Hibernate Reactive and Reactive PostgreSQL client.
 * Tested on Quarkus 2.11.3.
 * 
 * Based on https://github.com/hibernate/hibernate-reactive/blob/1aa452c050a989e72837b3f375e4e8a2673977ff/hibernate-reactive-core/src/test/java/org/hibernate/reactive/types/Json.java
 */
class JsonBinaryType : UserType {
    private val sqlTypes = intArrayOf(Types.OTHER)

    override fun equals(x: Any?, y: Any?): Boolean = Objects.equals(x, y)

    override fun hashCode(x: Any?): Int = Objects.hashCode(x)

    override fun sqlTypes(): IntArray = sqlTypes

    override fun returnedClass(): Class<*> = JsonObject::class.java

    override fun nullSafeGet(
        rs: ResultSet,
        names: Array<out String>,
        session: SharedSessionContractImplementor,
        owner: Any
    ): Any? = rs.getObject(names[0]) as JsonObject?

    override fun nullSafeSet(
        st: PreparedStatement,
        value: Any?,
        index: Int,
        session: SharedSessionContractImplementor
    ) {
        if (value != null)
            st.setObject(index, value)
        else
            st.setNull(index, Types.OTHER)
    }

    override fun deepCopy(value: Any?): Any? = (value as JsonObject?)?.copy()

    override fun isMutable(): Boolean = true

    override fun disassemble(value: Any?): Serializable? = (value as JsonObject?)?.encode()

    override fun assemble(cached: Serializable?, owner: Any): Any? {
        return if (cached != null)
            JsonObject(cached as String)
        else
            null
    }

    override fun replace(original: Any?, target: Any?, owner: Any?): Any? = (original as JsonObject?)?.copy()
}