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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.histogram;
import org.elasticsearch.search.aggregations.AggregationExecutionException;
import org.elasticsearch.search.aggregations.InternalAggregation.Type;
import org.elasticsearch.search.aggregations.InternalAggregations;
import org.elasticsearch.search.aggregations.support.format.ValueFormatter;
import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
/**
*
*/
public class InternalDateHistogram {
final static Type TYPE = new Type("date_histogram", "dhisto");
static class Bucket extends InternalHistogram.Bucket {
Bucket(boolean keyed, ValueFormatter formatter, InternalHistogram.Factory factory) {
super(keyed, formatter, factory);
}
Bucket(long key, long docCount, InternalAggregations aggregations, boolean keyed, ValueFormatter formatter,
InternalHistogram.Factory factory) {
super(key, docCount, keyed, formatter, factory, aggregations);
}
@Override
public String getKeyAsString() {
return formatter != null ? formatter.format(key) : ValueFormatter.DateTime.DEFAULT.format(key);
}
@Override
public DateTime getKey() {
return new DateTime(key, DateTimeZone.UTC);
}
@Override
public String toString() {
return getKeyAsString();
}
}
static class Factory extends InternalHistogram.Factory {
Factory() {
}
@Override
public String type() {
return TYPE.name();
}
@Override
public InternalDateHistogram.Bucket createBucket(InternalAggregations aggregations, InternalDateHistogram.Bucket prototype) {
return new Bucket(prototype.key, prototype.docCount, aggregations, prototype.getKeyed(), prototype.formatter, this);
}
@Override
public InternalDateHistogram.Bucket createBucket(Object key, long docCount, InternalAggregations aggregations, boolean keyed,
ValueFormatter formatter) {
if (key instanceof Number) {
return new Bucket(((Number) key).longValue(), docCount, aggregations, keyed, formatter, this);
} else if (key instanceof DateTime) {
return new Bucket(((DateTime) key).getMillis(), docCount, aggregations, keyed, formatter, this);
} else {
throw new AggregationExecutionException("Expected key of type Number or DateTime but got [" + key + "]");
}
}
@Override
protected InternalDateHistogram.Bucket createEmptyBucket(boolean keyed, ValueFormatter formatter) {
return new Bucket(keyed, formatter, this);
}
}
private InternalDateHistogram() {}
}