NPE during transformation

[loumaus]

Hi there ..

am facing a NPE and actually have no idea how to fix it.

My environment:

Scala: 2.8.1
sjson: 2.8.1_0.8

The exception:
java.lang.NullPointerException
at sjson.json.JsBean$$anonfun$3.apply(JsBean.scala:287)
at sjson.json.JsBean$$anonfun$3.apply(JsBean.scala:285)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:206)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:206)
at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:34)
at scala.collection.mutable.ArrayOps.foreach(ArrayOps.scala:35)
at scala.collection.TraversableLike$class.map(TraversableLike.scala:206)
at scala.collection.mutable.ArrayOps.map(ArrayOps.scala:35)
at sjson.json.JsBean$class.toJSON(JsBean.scala:285)
at sjson.json.Serializer$SJSON$.toJSON(Serializer.scala:112)
at sjson.json.Serializer$SJSON$class.out(Serializer.scala:38)
at sjson.json.Serializer$SJSON$.out(Serializer.scala:112)
at de.liventy.xfunds.ws.ResourcesUtil$class.serializeAsJSON(ProfileResource.scala:27)
at de.liventy.xfunds.ws.ShopResource.serializeAsJSON(ShopResource.scala:21)

The underlying classes:

trait ResourcesUtil {
def serializeAsJSON(obj: AnyRef): String = new String(Serializer.SJSON.out(obj))

def deserializeJSON[T](json: Array[Byte])(implicit m: Manifest[T]): AnyRef =
Serializer.SJSON.inT(m)
}

@JsonIgnoreProperties(Array("navigationcategory.sushiBarSourceCategoryId"))
class NavigationCategory {
@JsonProperty("navigationcategory.hasSubCategory") var hasSubCategory: Boolean = _
@JsonProperty("navigationcategory.navigationCategoryId") var id: Long = _
@JsonProperty("navigationcategory.overNavigationCategoryId") var overId: Long = _
@JsonProperty("navigationcategory.navigationCategoryNavisionId") var navisionId: Long = _
@JsonProperty("navigationcategory.navigationCategoryName") var name: String = _
@JsonProperty("navigationcategory.totalNumberOfProducts") var totalNumberOfProducts: Long = _

var resources:List[NavigationCategoryResource] = _

def setHasSubCategory(b:String){
hasSubCategory= if (b.equals("true")){true} else {false}
}

def setResources(jl:java.util.List[NavigationCategoryResource]){
resources = jl.toList
}
}

class NavigationCategoryResource{
@JsonProperty("resource.fileUrl") var fileUrl: String = _
@JsonProperty("resource.link") var link: String = _
@JsonProperty("resource.logicalCode") var logicalCode: String = _

}

Any hint or help is appreciated ...

[debasishg]

Thanks for using sjson. I will have a look at the earliest and let u know. I don't have the source code right now .. give me some time .. will get back.

[debasishg]

I think the reason you're getting NPE is because you missed out specifying @BeanInfo in the classes. I changed your class by doing the same and also changing the annotation @JsonProperty to what sjson supports (you had specified @JsonProperty, which is possibly something you implemented. Anyway here's the stuff that runs fine ..

@BeanInfo
class NavigationCategory {
@JsonProperty("navigationcategory.hasSubCategory") var hasSubCategory: Boolean = _
@JsonProperty("navigationcategory.navigationCategoryId") var id: Long = _
@JsonProperty("navigationcategory.overNavigationCategoryId") var overId: Long = _
@JsonProperty("navigationcategory.navigationCategoryNavisionId") var navisionId: Long = _
@JsonProperty("navigationcategory.navigationCategoryName") var name: String = _
@JsonProperty("navigationcategory.totalNumberOfProducts") var totalNumberOfProducts: Long = _

var resources:List[NavigationCategoryResource] = _

def setHasSubCategory(b:String){
  hasSubCategory= if (b.equals("true")){true} else {false}
}

// def setResources(jl:java.util.List[NavigationCategoryResource]){
def setResources(jl:List[NavigationCategoryResource]){
  resources = jl
}

}

@BeanInfo
class NavigationCategoryResource {
@JsonProperty("resource.fileUrl") var fileUrl: String = _
@JsonProperty("resource.link") var link: String = _
@JsonProperty("resource.logicalCode") var logicalCode: String = _
}

and the test case ..

val r = new NavigationCategoryResource
r.fileUrl = "http://google.com"
r.link = "link"
r.logicalCode = "logical_code"

val s = new NavigationCategory
s.setHasSubCategory("false")
s.setResources(List(r))
println(s)
val out = new String(serializer.out(s))
println(out)
val in = serializer.inNavigationCategory
println(in)

let me know if this works .. I am closing the issue right now. Will reopen is required ..