Content DB API - retrieving categories and attributes

Question

Hi, I'm trying to get the values of attributes of a document using the Content DB api, does anyone have an example? I can get as far as:
targetDoc = fileM.resolvePath("/acme/POST-IN/test.txt",requestedAttributes);
Item category;
NamedValue[] nvArray = targetDoc.getRequestedAttributes();
int len = (nvArray == null ? 0 : nvArray.length);
for (int i = 0; i < len; i++)
Item[] categories = (Item[]) nvArray.getValue();
for (int j = 0; (categories != null && j < categories.length); j++)
Item currentItem = categories[j];
s_Logger.log("item "+i+" "+j+" "+currentItem.getId()+currentItem.getName()+currentItem.getClass()+currentItem.getType());
Output: item 0 0 97922nullclass oracle.ifs.fdk.ItemCATEGORY
I'm not sure what exactly the currentItem is, it doesn't even have a name.

Answer 1

I found helpful information in the CDB toolkit, ApplyingCategories.java lines 250-258.
// next, let us retrieve the category instances that have been applied to
// our document that match our Test Category class type.
requestedAttributes = new AttributeRequest[] {
// for the matching category instances, return back the value of the
// second attribute ("Target Audience") by providing internal attr name.
// Note to return back all attributes of the category instance,
// Attributes.CUSTOM_ALL can be specified instead!
ClientUtils.newAttributeRequest(attribute2Name)
...