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« Facets Facet filters (not Filter Facet) »
Elastic Docs ›Java API [1.4] ›Facets

Facets

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Facets

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Terms Facet

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Here is how you can use Terms Facet with Java API.

Prepare facet request

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Here is an example on how to create the facet request:

FacetBuilders.termsFacet("f")
    .field("brand")
    .size(10);

Use facet response

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Import Facet definition classes:

import org.elasticsearch.search.facet.terms.*;
// sr is here your SearchResponse object
TermsFacet f = (TermsFacet) sr.getFacets().facetsAsMap().get("f");

f.getTotalCount();      // Total terms doc count
f.getOtherCount();      // Not shown terms doc count
f.getMissingCount();    // Without term doc count

// For each entry
for (TermsFacet.Entry entry : f) {
    entry.getTerm();    // Term
    entry.getCount();   // Doc count
}

Range Facet

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Here is how you can use Range Facet with Java API.

Prepare facet request

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Here is an example on how to create the facet request:

FacetBuilders.rangeFacet("f")
    .field("price")         // Field to compute on
    .addUnboundedFrom(3)    // from -infinity to 3 (excluded)
    .addRange(3, 6)         // from 3 to 6 (excluded)
    .addUnboundedTo(6);     // from 6 to +infinity

Use facet response

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Import Facet definition classes:

import org.elasticsearch.search.facet.range.*;
// sr is here your SearchResponse object
RangeFacet f = (RangeFacet) sr.getFacets().facetsAsMap().get("f");

// For each entry
for (RangeFacet.Entry entry : f) {
    entry.getFrom();    // Range from requested
    entry.getTo();      // Range to requested
    entry.getCount();   // Doc count
    entry.getMin();     // Min value
    entry.getMax();     // Max value
    entry.getMean();    // Mean
    entry.getTotal();   // Sum of values
}

Histogram Facet

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Here is how you can use Histogram Facet with Java API.

Prepare facet request

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Here is an example on how to create the facet request:

HistogramFacetBuilder facet = FacetBuilders.histogramFacet("f")
    .field("price")
    .interval(1);

Use facet response

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Import Facet definition classes:

import org.elasticsearch.search.facet.histogram.*;
// sr is here your SearchResponse object
HistogramFacet f = (HistogramFacet) sr.getFacets().facetsAsMap().get("f");

// For each entry
for (HistogramFacet.Entry entry : f) {
    entry.getKey();     // Key (X-Axis)
    entry.getCount();   // Doc count (Y-Axis)
}

Date Histogram Facet

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Here is how you can use Date Histogram Facet with Java API.

Prepare facet request

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Here is an example on how to create the facet request:

FacetBuilders.dateHistogramFacet("f")
    .field("date")      // Your date field
    .interval("year");  // You can also use "quarter", "month", "week", "day",
                        // "hour" and "minute" or notation like "1.5h" or "2w"

Use facet response

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Import Facet definition classes:

import org.elasticsearch.search.facet.datehistogram.*;
// sr is here your SearchResponse object
DateHistogramFacet f = (DateHistogramFacet) sr.getFacets().facetsAsMap().get("f");

// For each entry
for (DateHistogramFacet.Entry entry : f) {
    entry.getTime();    // Date in ms since epoch (X-Axis)
    entry.getCount();   // Doc count (Y-Axis)
}

Filter Facet (not facet filter)

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Here is how you can use Filter Facet with Java API.

If you are looking on how to apply a filter to a facet, have a look at facet filter using Java API.

Prepare facet request

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Here is an example on how to create the facet request:

FacetBuilders.filterFacet("f",
    FilterBuilders.termFilter("brand", "heineken"));    // Your Filter here

See Filters to learn how to build filters using Java.

Use facet response

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Import Facet definition classes:

import org.elasticsearch.search.facet.filter.*;
// sr is here your SearchResponse object
FilterFacet f = (FilterFacet) sr.getFacets().facetsAsMap().get("f");

f.getCount();   // Number of docs that matched

Query Facet

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Here is how you can use Query Facet with Java API.

Prepare facet request

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Here is an example on how to create the facet request:

FacetBuilders.queryFacet("f",
    QueryBuilders.matchQuery("brand", "heineken"));

Use facet response

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Import Facet definition classes:

import org.elasticsearch.search.facet.query.*;
// sr is here your SearchResponse object
QueryFacet f = (QueryFacet) sr.getFacets().facetsAsMap().get("f");

f.getCount();   // Number of docs that matched

See Queries to learn how to build queries using Java.

Statistical

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Here is how you can use the Statistical Facet with Java API.

Prepare facet request

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Here is an example on how to create the facet request:

FacetBuilders.statisticalFacet("f")
   .field("price");

Use facet response

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Import Facet definition classes:

import org.elasticsearch.search.facet.statistical.*;
// sr is here your SearchResponse object
StatisticalFacet f = (StatisticalFacet) sr.getFacets().facetsAsMap().get("f");

f.getCount();           // Doc count
f.getMin();             // Min value
f.getMax();             // Max value
f.getMean();            // Mean
f.getTotal();           // Sum of values
f.getStdDeviation();    // Standard Deviation
f.getSumOfSquares();    // Sum of Squares
f.getVariance();        // Variance

Terms Stats Facet

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Here is how you can use the Terms Stats Facet with Java API.

Prepare facet request

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Here is an example on how to create the facet request:

FacetBuilders.termsStatsFacet("f")
    .keyField("brand")
    .valueField("price");

Use facet response

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Import Facet definition classes:

import org.elasticsearch.search.facet.termsstats.*;
// sr is here your SearchResponse object
TermsStatsFacet f = (TermsStatsFacet) sr.getFacets().facetsAsMap().get("f");
f.getTotalCount();      // Total terms doc count
f.getOtherCount();      // Not shown terms doc count
f.getMissingCount();    // Without term doc count

// For each entry
for (TermsStatsFacet.Entry entry : f) {
    entry.getTerm();            // Term
    entry.getCount();           // Doc count
    entry.getMin();             // Min value
    entry.getMax();             // Max value
    entry.getMean();            // Mean
    entry.getTotal();           // Sum of values
}

Geo Distance Facet

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Here is how you can use the Geo Distance Facet with Java API.

Prepare facet request

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Here is an example on how to create the facet request:

FacetBuilders.geoDistanceFacet("f")
    .field("pin.location")              // Field containing coordinates we want to compare with
    .point(40, -70)                     // Point from where we start (0)
    .addUnboundedFrom(10)               // 0 to 10 km (excluded)
    .addRange(10, 20)                   // 10 to 20 km (excluded)
    .addRange(20, 100)                  // 20 to 100 km (excluded)
    .addUnboundedTo(100)                // from 100 km to infinity (and beyond ;-) )
    .unit(DistanceUnit.KILOMETERS);     // All distances are in kilometers. Can be MILES

Use facet response

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Import Facet definition classes:

import org.elasticsearch.search.facet.geodistance.*;
// sr is here your SearchResponse object
GeoDistanceFacet f = (GeoDistanceFacet) sr.getFacets().facetsAsMap().get("f");

// For each entry
for (GeoDistanceFacet.Entry entry : f) {
    entry.getFrom();            // Distance from requested
    entry.getTo();              // Distance to requested
    entry.getCount();           // Doc count
    entry.getMin();             // Min value
    entry.getMax();             // Max value
    entry.getTotal();           // Sum of values
    entry.getMean();            // Mean
}
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