mapper.scala

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scala> import com.mongodb.casbah.Imports._
import com.mongodb.casbah.Imports._

scala> val conn = MongoConnection() // connect to MongoDB
conn: com.mongodb.casbah.MongoConnection = com.mongodb.casbah.MongoConnection@7440d1b0

scala> val db = conn("test_db") // get a database handle
db: com.mongodb.casbah.MongoDB = test_db

scala> val collection = db("things") // get a collection handle
collection: com.mongodb.casbah.MongoCollection = MongoCollection()

scala> import com.bumnetworks.casbah.mapper.Mapper // we will extend this class to provide an object/document mapper
import com.bumnetworks.casbah.mapper.Mapper

scala> import scala.reflect.BeanInfo // need this annotation to generate bean info classes
import scala.reflect.BeanInfo

scala> import com.bumnetworks.casbah.mapper.annotations._ // mapper annotations that define fields
import com.bumnetworks.casbah.mapper.annotations._

scala> @BeanInfo @UseTypeHints case class Thing(@ID val id: ObjectId = new ObjectId, @Key name: String)
defined class Thing

scala> object ThingMapper extends Mapper[Thing] // define singleton mapper instance
defined module ThingMapper

scala> val thing1 = Thing(name = "thing 1") // create an instance of mapped case class
thing1: Thing = Thing(4cdcbb3f63c3807425ffe296,thing 1)

scala> collection.insert(ThingMapper.asDBObject(thing1)) // save it to MongoDB
res0: com.mongodb.WriteResult = { "err" :  null  , "n" : 0 , "ok" : 1.0}

scala> val things = collection.find.map(ThingMapper.asObject(_)) // retrieve back all saved objects
things: Iterator[Thing] = non-empty iterator

scala> val thing2 = things.next // get the first result
thing2: Thing = Thing(4cdcbb3f63c3807425ffe296,thing 1)

scala> thing2.equals(thing1) // compare it to original - it's the same "thing"!
res1: Boolean = true

scala>