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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