/**
* Scan the given index query and add the results to the provided set. The set comparator of the
* dynamic columns are compared via a tree comparator
*
* @param query
* @return
*/
public ScanBuffer scanIndex(IndexQuery query, Keyspace keyspace) {
DynamicComposite startScan = newComposite();
DynamicComposite endScan = newComposite();
// add the discriminator value so we're querying for the specified class
// and it's children
startScan.addComponent(discriminatorValue, stringSerializer);
endScan.addComponent(discriminatorValue, stringSerializer);
int length = fields.length;
int last = length - 1;
int componentIndex = 1;
FieldExpression exp = null;
for (int i = 0; i < last; i++, componentIndex++) {
exp = query.getExpression(this.fields[i].getMetaData());
this.fields[i].addToComposite(
startScan, componentIndex, exp.getStart(), ComponentEquality.EQUAL);
this.fields[i].addToComposite(endScan, componentIndex, exp.getEnd(), ComponentEquality.EQUAL);
}
exp = query.getExpression(this.fields[last].getMetaData());
this.fields[last].addToComposite(
startScan, componentIndex, exp.getStart(), exp.getStartEquality());
this.fields[last].addToComposite(endScan, componentIndex, exp.getEnd(), exp.getEndEquality());
return new ScanBuffer(keyspace, startScan, endScan, indexName);
}
