Hi Enrico,
Although an OrientVertex uses an ODocument internally, you cannot cast a
Vertex to an ODocument.
Are all of your edge classes derived from E and all of your vertex classes
derived from V?
You might double-check that, just in case.
Best regards,
-Colin
Orient Technologies
The Company behind OrientDB
On Thursday, May 7, 2015 at 7:53:28 AM UTC-5, Enrico Di Marco wrote:
>
> Hi,
> i'm trying to implement a time series function in Orient Graph 2.0.8
> i would like to build a simple series like the following
>
> Time --next--> Time --next--> Time --last-->Time
>
> where Time is a Vertex with timestamp and next and last are edges defined
> both as classes at shema level
> target in the function is attached to the newly created timestamp Vertex
>
> my function is as folllow
>
> var now = new Date().getTime();
> var gdb = orient.getGraph();
> var last;
> try {
> //create time vtx
> last = gdb.addVertex('class:Time');
> last.setProperty('last_update', now);
> //create edge target->now
> var targetV=gdb.getVertex(target);
> if (targetV!=null){
>
> //return newLastE;
> //se c'era un last aggiorno gli archi
> var lastsE = gdb.getEdgesOfClass('last');
> if (lastsE.iterator().hasNext()) {
> var oldLastE =lastsE.iterator().next();
> //return oldLastE;
>
> var inV=oldLastE.getInVertex();
> //return inV;
> var outV=oldLastE.getOutVertex();
> //return outV;
>
> var next=gdb.addEdge(null, outV, inV, "next");
> //return next;
> oldLastE.remove();
> //return oldLastE;
> gdb.addEdge(null, inV, last, "last");
> }else{
> //first time run
> var root = gdb.addVertex('class:Time');
> root.setProperty('last_update', 0);
> gdb.addEdge(null, root, last, "last");
> }
> var newLastE=gdb.addEdge(null, targetV, last, "updated"); //(id,
> in, out, class)
> }
> gdb.commit();
> } catch (err) {
> gdb.rollback();
> response.send(500, 'error creating time vertex', 'text/plain',
> err.toString());
> }
> return last;
>
>
>
> the problem arise when i try to build the edge 'next' with an error
>
> java.lang.ClassCastException:
> Cannotcastcom.orientechnologies.orient.core.record.impl.ODocumenttocom.tinkerpop.blueprints.Vertex
>
> i can i avoid this Cast and go ahead ?
>
> thanks for your time
>
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