Painless contexts

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A Painless script is evaluated within a context. Each context has values that are available as local variables, a whitelist that controls the available classes, and the methods and fields within those classes (API), and if and what type of value is returned.

A Painless script is typically executed within one of the contexts in the table below. Note this is not necessarily a comprehensive list as custom plugins and specialized code may define new ways to use a Painless script.