package edu.brown.markov.features;
import org.voltdb.catalog.ProcParameter;
import org.voltdb.catalog.Procedure;
import org.voltdb.utils.Pair;
import edu.brown.markov.FeatureSet;
import edu.brown.utils.PartitionEstimator;
import edu.brown.workload.TransactionTrace;
/**
* The hash value of a particular parameter equals the same thing as the base partition
* @author pavlo
*
*/
public class ParamHashPartitionFeature extends AbstractFeature {
public ParamHashPartitionFeature(PartitionEstimator p_estimator, Procedure catalog_proc) {
super(p_estimator, catalog_proc, ParamHashPartitionFeature.class);
}
@Override
public void extract(FeatureSet fset, TransactionTrace txn_trace) throws Exception {
for (ProcParameter catalog_param : this.catalog_proc.getParameters()) {
Object param = txn_trace.getParam(catalog_param.getIndex());
if (catalog_param.getIsarray()) {
Object inner[] = (Object[])param;
for (int i = 0; i < inner.length; i++) {
int param_hash = this.p_estimator.getHasher().hash(inner[i]);
fset.addFeature(txn_trace, this.getFeatureKey(catalog_param, i), param_hash, FeatureSet.Type.RANGE);
} // FOR
} else {
int param_hash = this.p_estimator.getHasher().hash(param);
fset.addFeature(txn_trace, this.getFeatureKey(catalog_param), param_hash, FeatureSet.Type.RANGE);
}
} // FOR
}
@Override
public Object calculate(String key, Object params[]) throws Exception {
Pair<ProcParameter, Integer> p = this.getProcParameterWithIndex(key);
Object param = params[p.getFirst().getIndex()];
Integer param_hash = null;
if (p.getSecond() != null) {
assert(p.getFirst().getIsarray()) : "Invalid: " + key;
param_hash = this.p_estimator.getHasher().hash(((Object[])param)[p.getSecond()]);
} else {
param_hash = this.p_estimator.getHasher().hash(param);
}
return (param_hash);
}
}