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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.solr.search.facet;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import org.apache.lucene.index.SortedSetDocValues;
import org.apache.lucene.queries.function.ValueSource;
import org.apache.lucene.util.BytesRef;
import org.apache.solr.common.SolrException;
import org.apache.solr.schema.SchemaField;
import org.apache.solr.search.function.FieldNameValueSource;
public class AvgAgg extends SimpleAggValueSource {
public AvgAgg(ValueSource vs) {
super("avg", vs);
}
@Override
public SlotAcc createSlotAcc(FacetContext fcontext, int numDocs, int numSlots) throws IOException {
ValueSource vs = getArg();
if (vs instanceof FieldNameValueSource) {
String field = ((FieldNameValueSource) vs).getFieldName();
SchemaField sf = fcontext.qcontext.searcher().getSchema().getField(field);
if (sf.getType().getNumberType() == null) {
throw new SolrException(SolrException.ErrorCode.BAD_REQUEST,
name() + " aggregation not supported for " + sf.getType().getTypeName());
}
if (sf.multiValued() || sf.getType().multiValuedFieldCache()) {
if (sf.hasDocValues()) {
if (sf.getType().isPointField()) {
return new AvgSortedNumericAcc(fcontext, sf, numSlots);
}
return new AvgSortedSetAcc(fcontext, sf, numSlots);
}
if (sf.getType().isPointField()) {
throw new SolrException(SolrException.ErrorCode.BAD_REQUEST,
name() + " aggregation not supported for PointField w/o docValues");
}
return new AvgUnInvertedFieldAcc(fcontext, sf, numSlots);
}
vs = sf.getType().getValueSource(sf, null);
}
return new AvgSlotAcc(vs, fcontext, numSlots);
}
@Override
public FacetMerger createFacetMerger(Object prototype) {
return new Merger();
}
private static class Merger extends FacetDoubleMerger {
long num;
double sum;
@Override
public void merge(Object facetResult, Context mcontext1) {
List numberList = (List) facetResult;
num += numberList.get(0).longValue();
sum += numberList.get(1).doubleValue();
}
@Override
protected double getDouble() {
// TODO: is it worth to try and cache?
return AggUtil.avg(sum, num);
}
}
class AvgSortedNumericAcc extends DoubleSortedNumericDVAcc {
int[] counts;
public AvgSortedNumericAcc(FacetContext fcontext, SchemaField sf, int numSlots) throws IOException {
super(fcontext, sf, numSlots, 0);
this.counts = new int[numSlots];
}
@Override
protected void collectValues(int doc, int slot) throws IOException {
for (int i = 0, count = values.docValueCount(); i < count; i++) {
result[slot]+=getDouble(values.nextValue());
counts[slot]++;
}
}
private double avg(int slot) {
return AggUtil.avg(result[slot], counts[slot]); // calc once and cache in result?
}
@Override
public int compare(int slotA, int slotB) {
return Double.compare(avg(slotA), avg(slotB));
}
@Override
public Object getValue(int slot) {
if (fcontext.isShard()) {
ArrayList lst = new ArrayList(2);
lst.add(counts[slot]);
lst.add(result[slot]);
return lst;
} else {
return avg(slot);
}
}
@Override
public void reset() throws IOException {
super.reset();
Arrays.fill(counts, 0);
}
@Override
public void resize(Resizer resizer) {
super.resize(resizer);
resizer.resize(counts, 0);
}
}
class AvgSortedSetAcc extends DoubleSortedSetDVAcc {
int[] counts;
public AvgSortedSetAcc(FacetContext fcontext, SchemaField sf, int numSlots) throws IOException {
super(fcontext, sf, numSlots, 0);
this.counts = new int[numSlots];
}
@Override
protected void collectValues(int doc, int slot) throws IOException {
long ord;
while ((ord = values.nextOrd()) != SortedSetDocValues.NO_MORE_ORDS) {
BytesRef term = values.lookupOrd(ord);
Object obj = sf.getType().toObject(sf, term);
double val = obj instanceof Date ? ((Date)obj).getTime(): ((Number)obj).doubleValue();
result[slot] += val;
counts[slot]++;
}
}
private double avg(int slot) {
return AggUtil.avg(result[slot], counts[slot]);
}
@Override
public int compare(int slotA, int slotB) {
return Double.compare(avg(slotA), avg(slotB));
}
@Override
public Object getValue(int slot) {
if (fcontext.isShard()) {
ArrayList lst = new ArrayList(2);
lst.add(counts[slot]);
lst.add(result[slot]);
return lst;
} else {
return avg(slot);
}
}
@Override
public void reset() throws IOException {
super.reset();
Arrays.fill(counts, 0);
}
@Override
public void resize(Resizer resizer) {
super.resize(resizer);
resizer.resize(counts, 0);
}
}
class AvgUnInvertedFieldAcc extends DoubleUnInvertedFieldAcc {
int[] counts;
public AvgUnInvertedFieldAcc(FacetContext fcontext, SchemaField sf, int numSlots) throws IOException {
super(fcontext, sf, numSlots, 0);
this.counts = new int[numSlots];
}
@Override
public void call(int termNum) {
try {
BytesRef term = docToTerm.lookupOrd(termNum);
Object obj = sf.getType().toObject(sf, term);
double val = obj instanceof Date? ((Date)obj).getTime(): ((Number)obj).doubleValue();
result[currentSlot] += val;
counts[currentSlot]++;
} catch (IOException e) {
// find a better way to do it
throw new UncheckedIOException(e);
}
}
private double avg(int slot) {
return AggUtil.avg(result[slot], counts[slot]);
}
@Override
public int compare(int slotA, int slotB) {
return Double.compare(avg(slotA), avg(slotB));
}
@Override
public Object getValue(int slot) {
if (fcontext.isShard()) {
ArrayList lst = new ArrayList(2);
lst.add(counts[slot]);
lst.add(result[slot]);
return lst;
} else {
return avg(slot);
}
}
@Override
public void reset() throws IOException {
super.reset();
Arrays.fill(counts, 0);
}
@Override
public void resize(Resizer resizer) {
super.resize(resizer);
resizer.resize(counts, 0);
}
}
}