public void reset(AnalysisEvaluatorBuffer analysisEvaBuffer) {
RankAgg agg = (RankAgg) analysisEvaBuffer;
agg.lastobj = null;
agg.rowid = -1;
agg.rank = 0;
agg.firstrow = true;
}
public Object terminate(
AnalysisEvaluatorBuffer analysisEvaBuffer,
ExprNodeEvaluator[] analysisParameterFields,
AnalysisBuffer<Object> analysisBuffer,
int currrowid,
boolean absolute,
BooleanTrans canternimate) {
canternimate.set(true);
RankAgg agg = (RankAgg) analysisEvaBuffer;
if (agg.rowid == currrowid) {
result.set(agg.rank);
return result;
}
agg.rowid = currrowid;
Object row = analysisBuffer.getByRowid(currrowid);
ArrayList<Object> rowfull = ((ArrayList<Object>) row);
row = rowfull.get(0);
if (agg.firstrow) {
agg.firstrow = false;
agg.lastobj = new Object[analysisParameterFields.length];
try {
for (int i = 0; i < agg.lastobj.length; i++) {
agg.lastobj[i] = analysisParameterFields[i].evaluate(row);
}
} catch (HiveException e) {
e.printStackTrace();
}
agg.rank = agg.rowid + 1;
} else {
try {
boolean newobj = false;
Object[] objs = new Object[analysisParameterFields.length];
for (int i = 0; i < objs.length; i++) {
Object obj = analysisParameterFields[i].evaluate(row);
if (ObjectInspectorUtils.compare(agg.lastobj[i], inputOI[i], obj, inputOI[i]) != 0) {
newobj = true;
}
objs[i] = obj;
}
if (newobj) {
agg.lastobj = objs;
agg.rank = agg.rowid + 1;
}
} catch (HiveException e) {
e.printStackTrace();
}
}
result.set(agg.rank);
return result;
}
