It is similar to Guava's AsyncFunction, redeclared so that Guava can be shaded.
Type Parameters
Name
Description
I
O
Methods
apply(I input)
publicabstractApiFuture<O>apply(Iinput)
Returns an output Future to use in place of the given input. The output Future need not be
done, making AsyncFunction suitable for asynchronous derivations.
Throwing an exception from this method is equivalent to returning a failing Future.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-15 UTC."],[[["\u003cp\u003eThe provided content outlines the different versions of the \u003ccode\u003eApiAsyncFunction\u003c/code\u003e interface, with version 2.46.1 being the most recent release.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eApiAsyncFunction\u003c/code\u003e interface, which has multiple available versions, is used for transforming values, potentially asynchronously, within the Google API.\u003c/p\u003e\n"],["\u003cp\u003eThe core functionality of \u003ccode\u003eApiAsyncFunction\u003c/code\u003e is encapsulated in its \u003ccode\u003eapply(I input)\u003c/code\u003e method, which takes an input of type \u003ccode\u003eI\u003c/code\u003e and returns an \u003ccode\u003eApiFuture\u003c/code\u003e of type \u003ccode\u003eO\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe interface also shares characteristics with the Guava \u003ccode\u003eAsyncFunction\u003c/code\u003e, but is declared separately to allow Guava shading.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eapply(I input)\u003c/code\u003e method may throw an exception that will result in the method returning a failing future.\u003c/p\u003e\n"]]],[],null,[]]
