jmespath extensions for jackson

JacksonJmesPathExt.kt

fun ObjectMapper.convertValueAsJsonNode(value:Any?):JsonNode = convertValue(value, JsonNode::class.java)

inline fun <reified T> JsonNode.jq(
    query: String,
    noinline convert: (Any) -> T
): T {
    val isNullable: Boolean = null is T
    try {
        val expression: Expression<JsonNode> = JmesPathJackson.compile(query)
        val resultNode: JsonNode? = expression.search(this)
        return when (resultNode) {
            null -> null
            else -> convert(resultNode)
        } as T
    } catch (all: Exception) {
        val className:String = buildString {
            append(T::class.qualifiedName)
            if(isNullable) { append("?") }
        }
        error("Failed to jq JsonNode.$query as $className ! reason: ${all.message}")
    }

}

object JmesPathJackson {
    private val JACKSON_RUNTIME = JacksonRuntime()

    private val runtime: JmesPath<JsonNode> = JACKSON_RUNTIME
    fun compile(expression: String): Expression<JsonNode> = runtime.compile(expression)
    fun search(input: JsonNode, expression: Expression<JsonNode>): JsonNode = expression.search(input)
}