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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.aggregations.bucket.range;
import com.google.common.collect.Lists;
import org.elasticsearch.common.Nullable;
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.xcontent.XContentBuilder;
import org.elasticsearch.search.aggregations.AggregationStreams;
import org.elasticsearch.search.aggregations.Aggregations;
import org.elasticsearch.search.aggregations.InternalAggregation;
import org.elasticsearch.search.aggregations.InternalAggregations;
import org.elasticsearch.search.aggregations.support.format.ValueFormatter;
import org.elasticsearch.search.aggregations.support.format.ValueFormatterStreams;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
*
*/
public class InternalRange extends InternalAggregation implements Range {
static final Factory FACTORY = new Factory();
public final static Type TYPE = new Type("range");
private final static AggregationStreams.Stream STREAM = new AggregationStreams.Stream() {
@Override
public InternalRange readResult(StreamInput in) throws IOException {
InternalRange ranges = new InternalRange();
ranges.readFrom(in);
return ranges;
}
};
public static void registerStream() {
AggregationStreams.registerStream(STREAM, TYPE.stream());
}
public static class Bucket implements Range.Bucket {
private final ValueFormatter formatter;
private final double from;
private final double to;
private final long docCount;
final InternalAggregations aggregations;
private final String key;
public Bucket(String key, double from, double to, long docCount, InternalAggregations aggregations, @Nullable ValueFormatter formatter) {
this.key = key != null ? key : generateKey(from, to, formatter);
this.from = from;
this.to = to;
this.docCount = docCount;
this.aggregations = aggregations;
this.formatter = formatter;
}
public String getKey() {
return key;
}
@Override
public Text getKeyAsText() {
return new StringText(getKey());
}
@Override
public Number getFrom() {
return from;
}
@Override
public Number getTo() {
return to;
}
@Override
public String getFromAsString() {
if (Double.isInfinite(from)) {
return null;
} else if (formatter == null) {
return ValueFormatter.RAW.format(from);
} else {
return formatter.format(from);
}
}
@Override
public String getToAsString() {
if (Double.isInfinite(to)) {
return null;
} else if (formatter == null) {
return ValueFormatter.RAW.format(to);
} else {
return formatter.format(to);
}
}
@Override
public long getDocCount() {
return docCount;
}
@Override
public Aggregations getAggregations() {
return aggregations;
}
protected Factory getFactory() {
return FACTORY;
}
Bucket reduce(List ranges, ReduceContext context) {
long docCount = 0;
List aggregationsList = Lists.newArrayListWithCapacity(ranges.size());
for (Bucket range : ranges) {
docCount += range.docCount;
aggregationsList.add(range.aggregations);
}
final InternalAggregations aggs = InternalAggregations.reduce(aggregationsList, context);
return getFactory().createBucket(key, from, to, docCount, aggs, formatter);
}
void toXContent(XContentBuilder builder, Params params, @Nullable ValueFormatter formatter, boolean keyed) throws IOException {
if (keyed) {
builder.startObject(key);
} else {
builder.startObject();
builder.field(CommonFields.KEY, key);
}
if (!Double.isInfinite(from)) {
builder.field(CommonFields.FROM, from);
if (formatter != null) {
builder.field(CommonFields.FROM_AS_STRING, formatter.format(from));
}
}
if (!Double.isInfinite(to)) {
builder.field(CommonFields.TO, to);
if (formatter != null) {
builder.field(CommonFields.TO_AS_STRING, formatter.format(to));
}
}
builder.field(CommonFields.DOC_COUNT, docCount);
aggregations.toXContentInternal(builder, params);
builder.endObject();
}
protected String generateKey(double from, double to, @Nullable ValueFormatter formatter) {
StringBuilder sb = new StringBuilder();
sb.append(Double.isInfinite(from) ? "*" : formatter != null ? formatter.format(from) : ValueFormatter.RAW.format(from));
sb.append("-");
sb.append(Double.isInfinite(to) ? "*" : formatter != null ? formatter.format(to) : ValueFormatter.RAW.format(to));
return sb.toString();
}
}
public static class Factory> {
public String type() {
return TYPE.name();
}
public R create(String name, List ranges, @Nullable ValueFormatter formatter, boolean keyed) {
return (R) new InternalRange<>(name, ranges, formatter, keyed);
}
public B createBucket(String key, double from, double to, long docCount, InternalAggregations aggregations, @Nullable ValueFormatter formatter) {
return (B) new Bucket(key, from, to, docCount, aggregations, formatter);
}
}
private List ranges;
private Map rangeMap;
private @Nullable ValueFormatter formatter;
private boolean keyed;
public InternalRange() {} // for serialization
public InternalRange(String name, List ranges, @Nullable ValueFormatter formatter, boolean keyed) {
super(name);
this.ranges = ranges;
this.formatter = formatter;
this.keyed = keyed;
}
@Override
public Type type() {
return TYPE;
}
@Override
public Collection getBuckets() {
return ranges;
}
@Override
public B getBucketByKey(String key) {
if (rangeMap == null) {
rangeMap = new HashMap<>(ranges.size());
for (Range.Bucket bucket : ranges) {
rangeMap.put(bucket.getKey(), (B) bucket);
}
}
return rangeMap.get(key);
}
protected Factory getFactory() {
return FACTORY;
}
@Override
public InternalAggregation reduce(ReduceContext reduceContext) {
List aggregations = reduceContext.aggregations();
@SuppressWarnings("unchecked")
List[] rangeList = new List[ranges.size()];
for (int i = 0; i < rangeList.length; ++i) {
rangeList[i] = new ArrayList();
}
for (InternalAggregation aggregation : aggregations) {
InternalRange ranges = (InternalRange) aggregation;
int i = 0;
for (Bucket range : ranges.ranges) {
rangeList[i++].add(range);
}
}
final List ranges = new ArrayList<>();
for (int i = 0; i < this.ranges.size(); ++i) {
ranges.add((B) rangeList[i].get(0).reduce(rangeList[i], reduceContext));
}
return getFactory().create(name, ranges, formatter, keyed);
}
@Override
public void readFrom(StreamInput in) throws IOException {
name = in.readString();
formatter = ValueFormatterStreams.readOptional(in);
keyed = in.readBoolean();
int size = in.readVInt();
List ranges = Lists.newArrayListWithCapacity(size);
for (int i = 0; i < size; i++) {
String key = in.readOptionalString();
ranges.add(getFactory().createBucket(key, in.readDouble(), in.readDouble(), in.readVLong(), InternalAggregations.readAggregations(in), formatter));
}
this.ranges = ranges;
this.rangeMap = null;
}
@Override
public void writeTo(StreamOutput out) throws IOException {
out.writeString(name);
ValueFormatterStreams.writeOptional(formatter, out);
out.writeBoolean(keyed);
out.writeVInt(ranges.size());
for (B bucket : ranges) {
out.writeOptionalString(((Bucket) bucket).key);
out.writeDouble(((Bucket) bucket).from);
out.writeDouble(((Bucket) bucket).to);
out.writeVLong(((Bucket) bucket).docCount);
bucket.aggregations.writeTo(out);
}
}
@Override
public XContentBuilder doXContentBody(XContentBuilder builder, Params params) throws IOException {
if (keyed) {
builder.startObject(CommonFields.BUCKETS);
} else {
builder.startArray(CommonFields.BUCKETS);
}
for (B range : ranges) {
range.toXContent(builder, params, formatter, keyed);
}
if (keyed) {
builder.endObject();
} else {
builder.endArray();
}
return builder;
}
}