org.elasticsearch.search.aggregations.bucket.terms.StringTerms Maven / Gradle / Ivy
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* 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.bytes.BytesArray;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.text.BytesText;
import org.elasticsearch.common.text.Text;
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 java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
/**
*
*/
public class StringTerms extends InternalTerms {
public static final InternalAggregation.Type TYPE = new Type("terms", "sterms");
public static AggregationStreams.Stream STREAM = new AggregationStreams.Stream() {
@Override
public StringTerms readResult(StreamInput in) throws IOException {
StringTerms buckets = new StringTerms();
buckets.readFrom(in);
return buckets;
}
};
public static void registerStreams() {
AggregationStreams.registerStream(STREAM, TYPE.stream());
}
public static class Bucket extends InternalTerms.Bucket {
final BytesRef termBytes;
public Bucket(BytesRef term, long docCount, InternalAggregations aggregations) {
super(docCount, aggregations);
this.termBytes = term;
}
@Override
public Text getKey() {
return new BytesText(new BytesArray(termBytes));
}
@Override
public Number getKeyAsNumber() {
// this method is needed for scripted numeric faceting
return Double.parseDouble(termBytes.utf8ToString());
}
@Override
int compareTerm(Terms.Bucket other) {
return BytesRef.getUTF8SortedAsUnicodeComparator().compare(termBytes, ((Bucket) other).termBytes);
}
}
StringTerms() {} // for serialization
public StringTerms(String name, InternalOrder order, int requiredSize, long minDocCount, Collection buckets) {
super(name, order, requiredSize, minDocCount, buckets);
}
@Override
public Type type() {
return TYPE;
}
@Override
public void readFrom(StreamInput in) throws IOException {
this.name = in.readString();
this.order = InternalOrder.Streams.readOrder(in);
this.requiredSize = in.readVInt();
this.minDocCount = in.readVLong();
int size = in.readVInt();
List buckets = new ArrayList(size);
for (int i = 0; i < size; i++) {
buckets.add(new Bucket(in.readBytesRef(), in.readVLong(), InternalAggregations.readAggregations(in)));
}
this.buckets = buckets;
this.bucketMap = null;
}
@Override
public void writeTo(StreamOutput out) throws IOException {
out.writeString(name);
InternalOrder.Streams.writeOrder(order, out);
out.writeVInt(requiredSize);
out.writeVLong(minDocCount);
out.writeVInt(buckets.size());
for (InternalTerms.Bucket bucket : buckets) {
out.writeBytesRef(((Bucket) bucket).termBytes);
out.writeVLong(bucket.getDocCount());
((InternalAggregations) bucket.getAggregations()).writeTo(out);
}
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject(name);
builder.startArray(CommonFields.BUCKETS);
for (InternalTerms.Bucket bucket : buckets) {
builder.startObject();
builder.field(CommonFields.KEY, ((Bucket) bucket).termBytes);
builder.field(CommonFields.DOC_COUNT, bucket.getDocCount());
((InternalAggregations) bucket.getAggregations()).toXContentInternal(builder, params);
builder.endObject();
}
builder.endArray();
builder.endObject();
return builder;
}
}