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/*
* Licensed to ElasticSearch and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. ElasticSearch 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.elasticsearch.search.facet.termsstats.doubles;
import org.apache.lucene.util.CollectionUtil;
import com.google.common.collect.ImmutableList;
import org.elasticsearch.common.CacheRecycler;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.bytes.HashedBytesArray;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.text.StringText;
import org.elasticsearch.common.text.Text;
import org.elasticsearch.common.trove.ExtTDoubleObjectHashMap;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentBuilderString;
import org.elasticsearch.search.facet.Facet;
import org.elasticsearch.search.facet.termsstats.InternalTermsStatsFacet;
import java.io.IOException;
import java.util.*;
public class InternalTermsStatsDoubleFacet extends InternalTermsStatsFacet {
private static final BytesReference STREAM_TYPE = new HashedBytesArray(Strings.toUTF8Bytes("dTS"));
public static void registerStream() {
Streams.registerStream(STREAM, STREAM_TYPE);
}
static Stream STREAM = new Stream() {
@Override
public Facet readFacet(StreamInput in) throws IOException {
return readTermsStatsFacet(in);
}
};
@Override
public BytesReference streamType() {
return STREAM_TYPE;
}
public InternalTermsStatsDoubleFacet() {
}
public static class DoubleEntry implements Entry {
double term;
long count;
long totalCount;
double total;
double min;
double max;
public DoubleEntry(double term, long count, long totalCount, double total, double min, double max) {
this.term = term;
this.count = count;
this.total = total;
this.totalCount = totalCount;
this.min = min;
this.max = max;
}
@Override
public Text getTerm() {
return new StringText(Double.toString(term));
}
@Override
public Number getTermAsNumber() {
return term;
}
@Override
public long getCount() {
return count;
}
@Override
public long getTotalCount() {
return this.totalCount;
}
@Override
public double getMin() {
return this.min;
}
@Override
public double getMax() {
return max;
}
@Override
public double getTotal() {
return total;
}
@Override
public double getMean() {
if (totalCount == 0) {
return 0;
}
return total / totalCount;
}
@Override
public int compareTo(Entry o) {
DoubleEntry other = (DoubleEntry) o;
return (term < other.term ? -1 : (term == other.term ? 0 : 1));
}
}
int requiredSize;
long missing;
Collection entries = ImmutableList.of();
ComparatorType comparatorType;
public InternalTermsStatsDoubleFacet(String name, ComparatorType comparatorType, int requiredSize, Collection entries, long missing) {
super(name);
this.comparatorType = comparatorType;
this.requiredSize = requiredSize;
this.entries = entries;
this.missing = missing;
}
@Override
public List getEntries() {
if (!(entries instanceof List)) {
entries = ImmutableList.copyOf(entries);
}
return (List) entries;
}
List mutableList() {
if (!(entries instanceof List)) {
entries = new ArrayList(entries);
}
return (List) entries;
}
@SuppressWarnings({"unchecked"})
@Override
public Iterator iterator() {
return (Iterator) entries.iterator();
}
@Override
public long getMissingCount() {
return this.missing;
}
@Override
public Facet reduce(List facets) {
if (facets.size() == 1) {
if (requiredSize == 0) {
// we need to sort it here!
InternalTermsStatsDoubleFacet tsFacet = (InternalTermsStatsDoubleFacet) facets.get(0);
if (!tsFacet.entries.isEmpty()) {
List entries = tsFacet.mutableList();
CollectionUtil.timSort(entries, comparatorType.comparator());
}
}
return facets.get(0);
}
int missing = 0;
ExtTDoubleObjectHashMap map = CacheRecycler.popDoubleObjectMap();
for (Facet facet : facets) {
InternalTermsStatsDoubleFacet tsFacet = (InternalTermsStatsDoubleFacet) facet;
missing += tsFacet.missing;
for (Entry entry : tsFacet) {
DoubleEntry doubleEntry = (DoubleEntry) entry;
DoubleEntry current = map.get(doubleEntry.term);
if (current != null) {
current.count += doubleEntry.count;
current.totalCount += doubleEntry.totalCount;
current.total += doubleEntry.total;
if (doubleEntry.min < current.min) {
current.min = doubleEntry.min;
}
if (doubleEntry.max > current.max) {
current.max = doubleEntry.max;
}
} else {
map.put(doubleEntry.term, doubleEntry);
}
}
}
// sort
if (requiredSize == 0) { // all terms
DoubleEntry[] entries1 = map.values(new DoubleEntry[map.size()]);
Arrays.sort(entries1, comparatorType.comparator());
CacheRecycler.pushDoubleObjectMap(map);
return new InternalTermsStatsDoubleFacet(getName(), comparatorType, requiredSize, Arrays.asList(entries1), missing);
} else {
Object[] values = map.internalValues();
Arrays.sort(values, (Comparator) comparatorType.comparator());
List ordered = new ArrayList(map.size());
for (int i = 0; i < requiredSize; i++) {
DoubleEntry value = (DoubleEntry) values[i];
if (value == null) {
break;
}
ordered.add(value);
}
CacheRecycler.pushDoubleObjectMap(map);
return new InternalTermsStatsDoubleFacet(getName(), comparatorType, requiredSize, ordered, missing);
}
}
static final class Fields {
static final XContentBuilderString _TYPE = new XContentBuilderString("_type");
static final XContentBuilderString MISSING = new XContentBuilderString("missing");
static final XContentBuilderString TERMS = new XContentBuilderString("terms");
static final XContentBuilderString TERM = new XContentBuilderString("term");
static final XContentBuilderString COUNT = new XContentBuilderString("count");
static final XContentBuilderString TOTAL_COUNT = new XContentBuilderString("total_count");
static final XContentBuilderString MIN = new XContentBuilderString("min");
static final XContentBuilderString MAX = new XContentBuilderString("max");
static final XContentBuilderString TOTAL = new XContentBuilderString("total");
static final XContentBuilderString MEAN = new XContentBuilderString("mean");
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject(getName());
builder.field(Fields._TYPE, InternalTermsStatsFacet.TYPE);
builder.field(Fields.MISSING, missing);
builder.startArray(Fields.TERMS);
for (Entry entry : entries) {
builder.startObject();
builder.field(Fields.TERM, ((DoubleEntry) entry).term);
builder.field(Fields.COUNT, entry.getCount());
builder.field(Fields.TOTAL_COUNT, entry.getTotalCount());
builder.field(Fields.MIN, entry.getMin());
builder.field(Fields.MAX, entry.getMax());
builder.field(Fields.TOTAL, entry.getTotal());
builder.field(Fields.MEAN, entry.getMean());
builder.endObject();
}
builder.endArray();
builder.endObject();
return builder;
}
public static InternalTermsStatsDoubleFacet readTermsStatsFacet(StreamInput in) throws IOException {
InternalTermsStatsDoubleFacet facet = new InternalTermsStatsDoubleFacet();
facet.readFrom(in);
return facet;
}
@Override
public void readFrom(StreamInput in) throws IOException {
super.readFrom(in);
comparatorType = ComparatorType.fromId(in.readByte());
requiredSize = in.readVInt();
missing = in.readVLong();
int size = in.readVInt();
entries = new ArrayList(size);
for (int i = 0; i < size; i++) {
entries.add(new DoubleEntry(in.readDouble(), in.readVLong(), in.readVLong(), in.readDouble(), in.readDouble(), in.readDouble()));
}
}
@Override
public void writeTo(StreamOutput out) throws IOException {
super.writeTo(out);
out.writeByte(comparatorType.id());
out.writeVInt(requiredSize);
out.writeVLong(missing);
out.writeVInt(entries.size());
for (Entry entry : entries) {
out.writeDouble(((DoubleEntry) entry).term);
out.writeVLong(entry.getCount());
out.writeVLong(entry.getTotalCount());
out.writeDouble(entry.getTotal());
out.writeDouble(entry.getMin());
out.writeDouble(entry.getMax());
}
}
}
