elasticsearch/docs/java-rest/high-level/ml/get-categories.asciidoc

--
:api: get-categories
:request: GetCategoriesRequest
:response: GetCategoriesResponse
--
[id="{upid}-{api}"]
=== Get Categories API

The Get Categories API retrieves one or more category results.
It accepts a +{request}+ object and responds
with a +{response}+ object.

[id="{upid}-{api}-request"]
==== Get Categories Request

A +{request}+ object gets created with an existing non-null `jobId`.

["source","java",subs="attributes,callouts,macros"]
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include-tagged::{doc-tests-file}[{api}-request]
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<1> Constructing a new request referencing an existing `jobId`

==== Optional Arguments
The following arguments are optional:

["source","java",subs="attributes,callouts,macros"]
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include-tagged::{doc-tests-file}[{api}-category-id]
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<1> The id of the category to get. Otherwise it will return all categories.

["source","java",subs="attributes,callouts,macros"]
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include-tagged::{doc-tests-file}[{api}-page]
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<1> The page parameters `from` and `size`. `from` specifies the number of categories to skip.
`size` specifies the maximum number of categories to get. Defaults to `0` and `100` respectively.

include::../execution.asciidoc[]

[id="{upid}-{api}-response"]
==== Get Categories Response

The returned +{response}+ contains the requested categories:

["source","java",subs="attributes,callouts,macros"]
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include-tagged::{doc-tests-file}[{api}-response]
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<1> The count of categories that were matched
<2> The categories retrieved