jacksontest.groovy

/**
 * Testing Jackson with Groovy 
 **/
import org.codehaus.jackson.map.*

// sample JSON
json = """{
    "name": {
        "first": "Morgoth",
        "last": "Melkor"
    },
    "job": "evil doer"
    
}"""

// name class:
// Groovy makes fields private and creates getters/setters automatically
class Name {
    String first, last
}

// person class
class Person {
    Name name
    String job
}

// testing Person and Name
p1 = new Person()
p1.name =  new Name( first: "bill", last: "ward" )
p1.job = "drummer"

// create an Jackson object mapper...
om = new ObjectMapper()

// create a new Person from JSON string
p2 = om.readValue(json, Person.class)
println(p2.job)

// write a JSON file
om.writeValue(new File("bill.json"), p1)

// load bill.json and open a stream
billJson = new File("bill.json")
fis = new FileInputStream(billJson)

// print JSON file's path
println(billJson.getAbsolutePath())

// iterate through stuff in the stream and print to console
for (j in fis) print((char)j)