/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.terms.doubles;
import org.elasticsearch.common.CacheRecycler;
import org.elasticsearch.common.collect.BoundedTreeSet;
import org.elasticsearch.common.collect.ImmutableList;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.trove.iterator.TDoubleIntIterator;
import org.elasticsearch.common.trove.map.hash.TDoubleIntHashMap;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentBuilderString;
import org.elasticsearch.search.facet.Facet;
import org.elasticsearch.search.facet.terms.InternalTermsFacet;
import org.elasticsearch.search.facet.terms.TermsFacet;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
/**
* @author kimchy (shay.banon)
*/
public class InternalDoubleTermsFacet extends InternalTermsFacet {
private static final String STREAM_TYPE = "dTerms";
public static void registerStream() {
Streams.registerStream(STREAM, STREAM_TYPE);
}
static Stream STREAM = new Stream() {
@Override public Facet readFacet(String type, StreamInput in) throws IOException {
return readTermsFacet(in);
}
};
@Override public String streamType() {
return STREAM_TYPE;
}
public static class DoubleEntry implements Entry {
double term;
int count;
public DoubleEntry(double term, int count) {
this.term = term;
this.count = count;
}
public String term() {
return Double.toString(term);
}
public String getTerm() {
return term();
}
@Override public Number termAsNumber() {
return term;
}
@Override public Number getTermAsNumber() {
return termAsNumber();
}
public int count() {
return count;
}
public int getCount() {
return count();
}
@Override public int compareTo(Entry o) {
double anotherVal = ((DoubleEntry) o).term;
if (term < anotherVal) {
return -1;
}
if (term == anotherVal) {
int i = count - o.count();
if (i == 0) {
i = System.identityHashCode(this) - System.identityHashCode(o);
}
return i;
}
return 1;
}
}
private String name;
int requiredSize;
long missing;
long total;
Collection<DoubleEntry> entries = ImmutableList.of();
ComparatorType comparatorType;
InternalDoubleTermsFacet() {
}
public InternalDoubleTermsFacet(String name, ComparatorType comparatorType, int requiredSize, Collection<DoubleEntry> entries, long missing, long total) {
this.name = name;
this.comparatorType = comparatorType;
this.requiredSize = requiredSize;
this.entries = entries;
this.missing = missing;
this.total = total;
}
@Override public String name() {
return this.name;
}
@Override public String getName() {
return this.name;
}
@Override public String type() {
return TYPE;
}
@Override public String getType() {
return type();
}
@Override public List<DoubleEntry> entries() {
if (!(entries instanceof List)) {
entries = ImmutableList.copyOf(entries);
}
return (List<DoubleEntry>) entries;
}
@Override public List<DoubleEntry> getEntries() {
return entries();
}
@SuppressWarnings({"unchecked"}) @Override public Iterator<Entry> iterator() {
return (Iterator) entries.iterator();
}
@Override public long missingCount() {
return this.missing;
}
@Override public long getMissingCount() {
return missingCount();
}
@Override public long totalCount() {
return this.total;
}
@Override public long getTotalCount() {
return totalCount();
}
@Override public long otherCount() {
long other = total;
for (Entry entry : entries) {
other -= entry.count();
}
return other;
}
@Override public long getOtherCount() {
return otherCount();
}
@Override public Facet reduce(String name, List<Facet> facets) {
if (facets.size() == 1) {
return facets.get(0);
}
InternalDoubleTermsFacet first = (InternalDoubleTermsFacet) facets.get(0);
TDoubleIntHashMap aggregated = CacheRecycler.popDoubleIntMap();
long missing = 0;
long total = 0;
for (Facet facet : facets) {
InternalDoubleTermsFacet mFacet = (InternalDoubleTermsFacet) facet;
missing += mFacet.missingCount();
total += mFacet.totalCount();
for (DoubleEntry entry : mFacet.entries) {
aggregated.adjustOrPutValue(entry.term, entry.count(), entry.count());
}
}
BoundedTreeSet<DoubleEntry> ordered = new BoundedTreeSet<DoubleEntry>(first.comparatorType.comparator(), first.requiredSize);
for (TDoubleIntIterator it = aggregated.iterator(); it.hasNext(); ) {
it.advance();
ordered.add(new DoubleEntry(it.key(), it.value()));
}
first.entries = ordered;
first.missing = missing;
first.total = total;
CacheRecycler.pushDoubleIntMap(aggregated);
return first;
}
static final class Fields {
static final XContentBuilderString _TYPE = new XContentBuilderString("_type");
static final XContentBuilderString MISSING = new XContentBuilderString("missing");
static final XContentBuilderString TOTAL = new XContentBuilderString("total");
static final XContentBuilderString OTHER = new XContentBuilderString("other");
static final XContentBuilderString TERMS = new XContentBuilderString("terms");
static final XContentBuilderString TERM = new XContentBuilderString("term");
static final XContentBuilderString COUNT = new XContentBuilderString("count");
}
@Override public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject(name);
builder.field(Fields._TYPE, TermsFacet.TYPE);
builder.field(Fields.MISSING, missing);
builder.field(Fields.TOTAL, total);
builder.field(Fields.OTHER, otherCount());
builder.startArray(Fields.TERMS);
for (DoubleEntry entry : entries) {
builder.startObject();
builder.field(Fields.TERM, entry.term);
builder.field(Fields.COUNT, entry.count());
builder.endObject();
}
builder.endArray();
builder.endObject();
return builder;
}
public static InternalDoubleTermsFacet readTermsFacet(StreamInput in) throws IOException {
InternalDoubleTermsFacet facet = new InternalDoubleTermsFacet();
facet.readFrom(in);
return facet;
}
@Override public void readFrom(StreamInput in) throws IOException {
name = in.readUTF();
comparatorType = ComparatorType.fromId(in.readByte());
requiredSize = in.readVInt();
missing = in.readVLong();
total = in.readVLong();
int size = in.readVInt();
entries = new ArrayList<DoubleEntry>(size);
for (int i = 0; i < size; i++) {
entries.add(new DoubleEntry(in.readDouble(), in.readVInt()));
}
}
@Override public void writeTo(StreamOutput out) throws IOException {
out.writeUTF(name);
out.writeByte(comparatorType.id());
out.writeVInt(requiredSize);
out.writeVLong(missing);
out.writeVLong(total);
out.writeVInt(entries.size());
for (DoubleEntry entry : entries) {
out.writeDouble(entry.term);
out.writeVInt(entry.count());
}
}
}