/*
* 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.terms;
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.search.aggregations.AggregationStreams;
import org.elasticsearch.search.aggregations.InternalAggregation;
import org.elasticsearch.search.aggregations.InternalAggregations;
import org.elasticsearch.search.aggregations.bucket.BucketStreamContext;
import org.elasticsearch.search.aggregations.bucket.BucketStreams;
import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
*
*/
public class StringTerms extends InternalTerms<StringTerms, StringTerms.Bucket> {
public static final InternalAggregation.Type TYPE = new Type("terms", "sterms");
public static final AggregationStreams.Stream STREAM = new AggregationStreams.Stream() {
@Override
public StringTerms readResult(StreamInput in) throws IOException {
StringTerms buckets = new StringTerms();
buckets.readFrom(in);
return buckets;
}
};
private final static BucketStreams.Stream<Bucket> BUCKET_STREAM = new BucketStreams.Stream<Bucket>() {
@Override
public Bucket readResult(StreamInput in, BucketStreamContext context) throws IOException {
Bucket buckets = new Bucket((boolean) context.attributes().get("showDocCountError"));
buckets.readFrom(in);
return buckets;
}
@Override
public BucketStreamContext getBucketStreamContext(Bucket bucket) {
BucketStreamContext context = new BucketStreamContext();
Map<String, Object> attributes = new HashMap<>();
attributes.put("showDocCountError", bucket.showDocCountError);
context.attributes(attributes);
return context;
}
};
public static void registerStreams() {
AggregationStreams.registerStream(STREAM, TYPE.stream());
BucketStreams.registerStream(BUCKET_STREAM, TYPE.stream());
}
public static class Bucket extends InternalTerms.Bucket {
BytesRef termBytes;
public Bucket(boolean showDocCountError) {
super(null, showDocCountError);
}
public Bucket(BytesRef term, long docCount, InternalAggregations aggregations, boolean showDocCountError, long docCountError) {
super(docCount, aggregations, showDocCountError, docCountError, null);
this.termBytes = term;
}
@Override
public Object getKey() {
return getKeyAsString();
}
@Override
public Number getKeyAsNumber() {
// this method is needed for scripted numeric aggs
return Double.parseDouble(termBytes.utf8ToString());
}
@Override
public String getKeyAsString() {
return termBytes.utf8ToString();
}
@Override
int compareTerm(Terms.Bucket other) {
return BytesRef.getUTF8SortedAsUnicodeComparator().compare(termBytes, ((Bucket) other).termBytes);
}
@Override
Bucket newBucket(long docCount, InternalAggregations aggs, long docCountError) {
return new Bucket(termBytes, docCount, aggs, showDocCountError, docCountError);
}
@Override
public void readFrom(StreamInput in) throws IOException {
termBytes = in.readBytesRef();
docCount = in.readVLong();
docCountError = -1;
if (showDocCountError) {
docCountError = in.readLong();
}
aggregations = InternalAggregations.readAggregations(in);
}
@Override
public void writeTo(StreamOutput out) throws IOException {
out.writeBytesRef(termBytes);
out.writeVLong(getDocCount());
if (showDocCountError) {
out.writeLong(docCountError);
}
aggregations.writeTo(out);
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject();
builder.utf8Field(CommonFields.KEY, termBytes);
builder.field(CommonFields.DOC_COUNT, getDocCount());
if (showDocCountError) {
builder.field(InternalTerms.DOC_COUNT_ERROR_UPPER_BOUND_FIELD_NAME, getDocCountError());
}
aggregations.toXContentInternal(builder, params);
builder.endObject();
return builder;
}
}
StringTerms() {
} // for serialization
public StringTerms(String name, Terms.Order order, int requiredSize, int shardSize, long minDocCount,
List<? extends InternalTerms.Bucket> buckets, boolean showTermDocCountError, long docCountError, long otherDocCount,
List<PipelineAggregator> pipelineAggregators, Map<String, Object> metaData) {
super(name, order, requiredSize, shardSize, minDocCount, buckets, showTermDocCountError, docCountError, otherDocCount, pipelineAggregators,
metaData);
}
@Override
public Type type() {
return TYPE;
}
@Override
public StringTerms create(List<Bucket> buckets) {
return new StringTerms(this.name, this.order, this.requiredSize, this.shardSize, this.minDocCount, buckets,
this.showTermDocCountError, this.docCountError, this.otherDocCount, this.pipelineAggregators(), this.metaData);
}
@Override
public Bucket createBucket(InternalAggregations aggregations, Bucket prototype) {
return new Bucket(prototype.termBytes, prototype.docCount, aggregations, prototype.showDocCountError, prototype.docCountError);
}
@Override
protected StringTerms create(String name, List<org.elasticsearch.search.aggregations.bucket.terms.InternalTerms.Bucket> buckets,
long docCountError, long otherDocCount, InternalTerms prototype) {
return new StringTerms(name, prototype.order, prototype.requiredSize, prototype.shardSize, prototype.minDocCount, buckets,
prototype.showTermDocCountError, docCountError, otherDocCount, prototype.pipelineAggregators(), prototype.getMetaData());
}
@Override
protected void doReadFrom(StreamInput in) throws IOException {
this.docCountError = in.readLong();
this.order = InternalOrder.Streams.readOrder(in);
this.requiredSize = readSize(in);
this.shardSize = readSize(in);
this.showTermDocCountError = in.readBoolean();
this.minDocCount = in.readVLong();
this.otherDocCount = in.readVLong();
int size = in.readVInt();
List<InternalTerms.Bucket> buckets = new ArrayList<>(size);
for (int i = 0; i < size; i++) {
Bucket bucket = new Bucket(showTermDocCountError);
bucket.readFrom(in);
buckets.add(bucket);
}
this.buckets = buckets;
this.bucketMap = null;
}
@Override
protected void doWriteTo(StreamOutput out) throws IOException {
out.writeLong(docCountError);
InternalOrder.Streams.writeOrder(order, out);
writeSize(requiredSize, out);
writeSize(shardSize, out);
out.writeBoolean(showTermDocCountError);
out.writeVLong(minDocCount);
out.writeVLong(otherDocCount);
out.writeVInt(buckets.size());
for (InternalTerms.Bucket bucket : buckets) {
bucket.writeTo(out);
}
}
@Override
public XContentBuilder doXContentBody(XContentBuilder builder, Params params) throws IOException {
builder.field(InternalTerms.DOC_COUNT_ERROR_UPPER_BOUND_FIELD_NAME, docCountError);
builder.field(SUM_OF_OTHER_DOC_COUNTS, otherDocCount);
builder.startArray(CommonFields.BUCKETS);
for (InternalTerms.Bucket bucket : buckets) {
bucket.toXContent(builder, params);
}
builder.endArray();
return builder;
}
}