/**
* This is a helper method of the method Object visit(SimpleOperatorGraphVisitor visitor)
*
* @param visitor The visitor to be applied to each node
* @param hs the already visited operators
* @return The object retrieved from processing the visitor on this operator.
*/
private Object visit(final SimpleOperatorGraphVisitor visitor, final HashSet<BasicOperator> hs) {
if (hs.contains(this)) return null;
hs.add(this);
final Object result = visitor.visit(this);
for (final OperatorIDTuple opid : this.succeedingOperators) {
opid.getOperator().visit(visitor, hs);
}
return result;
}
/**
* This is a helper method of the method Object visit(SimpleOperatorGraphVisitor visitor)
*
* @param visitor The visitor to be applied to each node
* @param hs the already visited operators
* @return The object retrieved from processing the visitor on this operator.
*/
private Object visitAndStop(
final SimpleOperatorGraphVisitor visitor, final HashSet<BasicOperator> hs) {
if (hs.contains(this)) {
return null;
}
hs.add(this);
Object result = visitor.visit(this);
if (result != null) {
return result;
}
for (final OperatorIDTuple opid : this.succeedingOperators) {
result = opid.getOperator().visitAndStop(visitor, hs);
if (result != null) {
return result;
}
}
return result;
}
