org.elasticsearch.search.facet.range.InternalRangeFacet Maven / Gradle / Ivy
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* Licensed to Elasticsearch 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.range;
import com.google.common.collect.ImmutableList;
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.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentBuilderString;
import org.elasticsearch.search.facet.Facet;
import org.elasticsearch.search.facet.InternalFacet;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
/**
*
*/
public class InternalRangeFacet extends InternalFacet implements RangeFacet {
private static final BytesReference STREAM_TYPE = new HashedBytesArray(Strings.toUTF8Bytes("range"));
public static void registerStreams() {
Streams.registerStream(STREAM, STREAM_TYPE);
}
static Stream STREAM = new Stream() {
@Override
public Facet readFacet(StreamInput in) throws IOException {
return readRangeFacet(in);
}
};
@Override
public BytesReference streamType() {
return STREAM_TYPE;
}
Entry[] entries;
InternalRangeFacet() {
}
public InternalRangeFacet(String name, Entry[] entries) {
super(name);
this.entries = entries;
}
@Override
public String getType() {
return RangeFacet.TYPE;
}
@Override
public List getEntries() {
return ImmutableList.copyOf(entries);
}
@Override
public Iterator iterator() {
return getEntries().iterator();
}
@Override
public Facet reduce(ReduceContext context) {
List facets = context.facets();
if (facets.size() == 1) {
return facets.get(0);
}
InternalRangeFacet agg = null;
for (Facet facet : facets) {
InternalRangeFacet geoDistanceFacet = (InternalRangeFacet) facet;
if (agg == null) {
agg = geoDistanceFacet;
} else {
for (int i = 0; i < geoDistanceFacet.entries.length; i++) {
RangeFacet.Entry aggEntry = agg.entries[i];
RangeFacet.Entry currentEntry = geoDistanceFacet.entries[i];
aggEntry.count += currentEntry.count;
aggEntry.totalCount += currentEntry.totalCount;
aggEntry.total += currentEntry.total;
if (currentEntry.min < aggEntry.min) {
aggEntry.min = currentEntry.min;
}
if (currentEntry.max > aggEntry.max) {
aggEntry.max = currentEntry.max;
}
}
}
}
return agg;
}
public static InternalRangeFacet readRangeFacet(StreamInput in) throws IOException {
InternalRangeFacet facet = new InternalRangeFacet();
facet.readFrom(in);
return facet;
}
@Override
public void readFrom(StreamInput in) throws IOException {
super.readFrom(in);
entries = new Entry[in.readVInt()];
for (int i = 0; i < entries.length; i++) {
Entry entry = new Entry();
entry.from = in.readDouble();
entry.to = in.readDouble();
if (in.readBoolean()) {
entry.fromAsString = in.readString();
}
if (in.readBoolean()) {
entry.toAsString = in.readString();
}
entry.count = in.readVLong();
entry.totalCount = in.readVLong();
entry.total = in.readDouble();
entry.min = in.readDouble();
entry.max = in.readDouble();
entries[i] = entry;
}
}
@Override
public void writeTo(StreamOutput out) throws IOException {
super.writeTo(out);
out.writeVInt(entries.length);
for (Entry entry : entries) {
out.writeDouble(entry.from);
out.writeDouble(entry.to);
if (entry.fromAsString == null) {
out.writeBoolean(false);
} else {
out.writeBoolean(true);
out.writeString(entry.fromAsString);
}
if (entry.toAsString == null) {
out.writeBoolean(false);
} else {
out.writeBoolean(true);
out.writeString(entry.toAsString);
}
out.writeVLong(entry.count);
out.writeVLong(entry.totalCount);
out.writeDouble(entry.total);
out.writeDouble(entry.min);
out.writeDouble(entry.max);
}
}
static final class Fields {
static final XContentBuilderString _TYPE = new XContentBuilderString("_type");
static final XContentBuilderString RANGES = new XContentBuilderString("ranges");
static final XContentBuilderString FROM = new XContentBuilderString("from");
static final XContentBuilderString FROM_STR = new XContentBuilderString("from_str");
static final XContentBuilderString TO = new XContentBuilderString("to");
static final XContentBuilderString TO_STR = new XContentBuilderString("to_str");
static final XContentBuilderString COUNT = new XContentBuilderString("count");
static final XContentBuilderString TOTAL = new XContentBuilderString("total");
static final XContentBuilderString TOTAL_COUNT = new XContentBuilderString("total_count");
static final XContentBuilderString MEAN = new XContentBuilderString("mean");
static final XContentBuilderString MIN = new XContentBuilderString("min");
static final XContentBuilderString MAX = new XContentBuilderString("max");
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject(getName());
builder.field(Fields._TYPE, "range");
builder.startArray(Fields.RANGES);
for (Entry entry : entries) {
builder.startObject();
if (!Double.isInfinite(entry.from)) {
builder.field(Fields.FROM, entry.from);
}
if (entry.fromAsString != null) {
builder.field(Fields.FROM_STR, entry.fromAsString);
}
if (!Double.isInfinite(entry.to)) {
builder.field(Fields.TO, entry.to);
}
if (entry.toAsString != null) {
builder.field(Fields.TO_STR, entry.toAsString);
}
builder.field(Fields.COUNT, entry.getCount());
// only output min and max if there are actually documents matching this range...
if (entry.getTotalCount() > 0) {
builder.field(Fields.MIN, entry.getMin());
builder.field(Fields.MAX, entry.getMax());
}
builder.field(Fields.TOTAL_COUNT, entry.getTotalCount());
builder.field(Fields.TOTAL, entry.getTotal());
builder.field(Fields.MEAN, entry.getMean());
builder.endObject();
}
builder.endArray();
builder.endObject();
return builder;
}
}