selectFirst

Finds the first value that matches path in a given BSON document.

val document: Bson = …

document.selectFirst<String>(BsonPath["foo"]["bar"])

will return the value of the field foo.bar.

Depending on your situation, you can also use the equivalent function at:

val document: Bson = …

val bar: String = document at BsonPath["foo"]["bar"]

If no element is found matching the path.

inline fun <T> Bson.selectFirst(@Language(value = "JSONPath") path: String): T(source)

Finds the first value that matches path in a given BSON document.

To learn more about the syntax, see BsonPath.

val document: Bson = …

document.selectFirst<String>("$.foo.bar")

will return the value of the field foo.bar.