Re: [Vala] Having a problem understanding Vala or Gee HashMap

[Jason Martin <agrellum gmail com>]

Got it. Thanks again.

On Thu, Aug 6, 2015 at 4:52 AM, Jason Martin <agrellum gmail com> wrote:

> I am porting some Java software to Vala but I cannot understand why the
> following code will not work like I think it should.
>
> Vala 0.26.2, libgee-0.8 on Xubuntu 15.04
>
> Thanks in advance. I have used many variations and casts but I cannot get
> @get or has_key for Gee.HashMap to work. (website samples work fine for me)
>
> I placed notes in the comments.
>
>
> public virtual RexxNode getnode (Rexx key) {
>
> /* this.coll is part of a whole Rexx Object */
> if (this.coll == null) {
> lock (this.coll) {
> if (this.coll == null) { // still virgin
> this.coll = new HashMap<Rexx, RexxNode> (); // make a hashtable
> /* IF I place a @set entry here for testing only */
> /* var node =  this coll  get (key) below finds it */
> }
> }
> }
>
> /* But it ALWAYS RETURNS NULL - for any other entry */
> var node =  this coll  get (key); // look it up
>
> /* foreach works like it should */
> foreach (var entry in coll.entries) {
> if (key.OpEqS(null, entry.key)) {
> stdout.printf ("we found the key - it's there\n");
> /* BUT this also RETURNS has key FALSE */
> stdout.printf("has key %s\n", this.coll.has_key(key).to_string ());
> node = entry.value;
> }
> }
>
> if (node != null) { // found
> if (node.leaf != null) {
> stdout.printf ("Only gets here if foreach is used\n");
> ;
> }
> } else {
> node = new RexxNode (new Rexx.clone (this)); // make node
> /* @set works fine unlike @get or has_key */
> this coll  set (key, node); // save
> }
>
> return node;
> }