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Is it possible to find out whether two instances are of the same class, programmatically (Using api such as JENA)
682
If the two objects have the same values, equals() will return true . In the second comparison, equals() checks to see whether the passed object is null, or if it's typed as a different class. If it's a different class then the objects are not equal.
The referential equality (using === , == or Object.is() ) determines whether the operands are the same object instance.
An rdf:Bag is used to indicate that the container is intended to be unordered. An rdf:Seq is used to indicate that the order indicated by the numerical order of the container membership properties of the container is intended to be significant.
Easy in SPARQL:
ASK { <instance1> a ?class . <instance2> a ?class . }
In Jena API:
boolean shareClass = false;
for (Statement s: instance1.listProperties(RDF.type)) {
if (instance2.hasProperty(RDF.type, s.getObject()) {
shareClass = true;
break;
}
}
Not very elegant.
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