Adding a Category to a noderef

[mr_apples]

Hi all,
I'm facing problems trying to add a category to a noderef.

My webscript downloads a file from an external source, then loads properties for an aspect, then applies the aspect to file, then stores the file at specified path.
Now the boss asked for a category. the following doesn't work:

//nds = nodeService;
ArrayList<NodeRef> categories = new ArrayList<NodeRef>();            
categories.add(categoryNode);
HashMap<QName, Serializable> categoriesProps = new HashMap<QName, Serializable>();
categoriesProps.put(ContentModel.PROP_CATEGORIES, categories);
if(nds.hasAspect(file_info.getNodeRef(), ContentModel.ASPECT_GEN_CLASSIFIABLE) == false) {
    nds.addAspect(file_info.getNodeRef(), ContentModel.ASPECT_GEN_CLASSIFIABLE, categoriesProps);
} else {
    nds.setProperty(file_info.getNodeRef(), QName.createQName("{http://www.alfresco.org/model/content/1.0}subcategories"), "{http://www.alfresco.org/model/content/1.0}Tags");
}‍‍‍‍‍‍‍‍‍‍‍

setProperty doesn't work in any of my attempts:

nds.setProperty(file_info.getNodeRef(), QName.createQName("http://www.alfresco.org/model/content/1.0", "subcategories"), QName.createQName("http://www.alfresco.org/model/content/1.0", "Tags");‍

or any other combination of the above.

Any idea?

[mr_apples]

I did find an answer by myself. It's not the final one, but it covers the problem for a while:

// reference to a category node. The reference is by its id.
NodeRef categoryNode = new NodeRef("workspace://SpacesStore/170ca17e-5625-4285-bd2f-898efae39128");

if (nds.hasAspect(file_info.getNodeRef(), ContentModel.ASPECT_GEN_CLASSIFIABLE) == false) {
    // List of categories. At first step only categoryNode will be added
    ArrayList<NodeRef> categories = new ArrayList<NodeRef>();
    categories.add(categoryNode);

    HashMap<QName, Serializable> categoriesProps = new HashMap<QName, Serializable>();
    categoriesProps.put(ContentModel.PROP_CATEGORIES, categories);

    // Adds the generalclassifiable aspect to the file, so it can be classifiable via categories
    nds.addAspect(file_info.getNodeRef(), ContentModel.ASPECT_GEN_CLASSIFIABLE, categoriesProps);
} else {
    // The file is already classifiable, so we simply add the category
    nds.setProperty(file_info.getNodeRef(), ContentModel.PROP_CATEGORIES, categoryNode);
}
‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

The problem is that categoryNode is referred by an id that can be changed at any time. It will probably change in production environment, so now the question is: how can I get a category node without using a search?

[toze]

You got it solved?