Decimal Histogram Facet Plugin for elasticsearch

This plugin provides a facet for elasticsearch that works like the built-in histogram facet, but supports floating point intervals as well as offsets.

To install the plugin, run:

bin/plugin --url https://github.com/zenobase/decimal-histogram-facet/releases/download/0.0.4/decimal-histogram-facet-0.0.4.jar --install decimal-histogram-facet

Versions

decimal-histogram-facet	elasticsearch
0.0.5 -> master	1.4.x -> 1.7.x
0.0.4	1.2.x, 1.3.x
0.0.3	1.0.x, 1.1.x
0.0.2	0.90.6, 0.90.7
0.0.1	0.90.5

Parameters

field	The name of a field containing numeric values.
interval	The (floating point) bucket size.
offset	Optional (floating point) offset for each bucket.

Example

Histogram with 0.5 Celsius degree buckets on values that are stored in degrees Kelvin:

Query:

{
    "query" : { ... }
    "facets" : {
        "places" : { 
            "decimal_histogram" : {
                "field" : "temperature",
                "interval" : 0.5,
                "offset" : -273.15
            }
        }
    }
}

SearchSourceBuilder search = ...
search.facet(new DecimalHistogramFacetBuilder("demo", "temperature", 0.5, -273.15, HistogramFacet.ComparatorType.KEY));

Result:

{
    ...
    "facets" : {
        "demo" : {
            "entries" : [ {
              "key" : 20.0
              "count" : 1
            }, {
              "key" : 20.5
              "count" : 3
        } ]
    }
}

License

This software is licensed under the Apache 2 license, quoted below.

Copyright 2012-2014 Zenobase LLC

Licensed 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.