/* Ċ Ġ* ĠCopyright Ġ 2 0 1 8 ĠGoogle ĠLLC Ċ Ġ* Ċ Ġ* ĠLicensed Ġunder Ġthe ĠApache ĠLicense , ĠVersion Ġ 2 . 0 Ġ( the Ġ" License "); Ċ Ġ* Ġyou Ġmay Ġnot Ġuse Ġthis Ġfile Ġexcept Ġin Ġcompliance Ġwith Ġthe ĠLicense . Ċ Ġ* ĠYou Ġmay Ġobtain Ġa Ġcopy Ġof Ġthe ĠLicense Ġat Ċ Ġ* Ċ Ġ* ĠĠĠĠ Ġhttps :// www . apache . org / licenses / LICENSE - 2 . 0 Ċ Ġ* Ċ Ġ* ĠUnless Ġrequired Ġby Ġapplicable Ġlaw Ġor Ġagreed Ġto Ġin Ġwriting , Ġsoftware Ċ Ġ* Ġdistributed Ġunder Ġthe ĠLicense Ġis Ġdistributed Ġon Ġan Ġ" AS ĠIS " ĠBASIS , Ċ Ġ* ĠWITHOUT ĠWARRANTIES ĠOR ĠCONDITIONS ĠOF ĠANY ĠKIND , Ġeither Ġexpress Ġor Ġimplied . Ċ Ġ* ĠSee Ġthe ĠLicense Ġfor Ġthe Ġspecific Ġlanguage Ġgoverning Ġpermissions Ġand Ċ Ġ* Ġlimitations Ġunder Ġthe ĠLicense . Ċ Ġ*/ Ċ Ċ package Ġcom . example . android . advanced coroutines Ċ Ċ import Ġandroidx . lifecycle . LiveData Ċ import Ġandroidx . room . Dao Ċ import Ġandroidx . room . Insert Ċ import Ġandroidx . room . On Conflict Strategy Ċ import Ġandroidx . room . Query Ċ import Ġkotlinx . coroutines . flow . Flow Ċ Ċ /** Ċ Ġ* ĠThe ĠData ĠAccess ĠObject Ġfor Ġthe ĠPl ant Ġclass . Ċ Ġ* Ċ Ġ* ĠBy Ġspecifying Ġa ĠFlow Ġreturn Ġtype , ĠRoom Ġexecutes Ġthe Ġquery Ġwith Ġthe Ġfollowing Ġcharacteristics : Ċ Ċ Main - safety ĠâĢĵ ĠQueries Ġwith Ġa ĠFlow Ġreturn Ġtype Ġalways Ġrun Ġon Ġthe ĠRoom Ġexec utors , Ġso Ġthey Ġare Ġalways Ġmain - safe . Ċ You Ġdon 't Ġneed Ġto Ġdo Ġanything Ġin Ġyour Ġcode Ġto Ġmake Ġthem Ġrun Ġoff Ġthe Ġmain Ġthread . Ċ Ob serves Ġchanges ĠâĢĵ ĠRoom Ġautomatically Ġob serves Ġchanges Ġand Ġemits Ġnew Ġvalues Ġto Ġthe Ġflow . Ċ Async Ġsequence ĠâĢĵ ĠFlow Ġemits Ġthe Ġentire Ġquery Ġresult Ġon Ġeach Ġchange , Ġand Ġit Ġwon 't Ġintroduce Ġany Ġbuffers . Ċ If Ġyou Ġreturn Ġa ĠFlow < List < T >>, Ġthe Ġflow Ġemits Ġa ĠList < T > Ġthat Ġcontains Ġall Ġrows Ġfrom Ġthe Ġquery Ġresult . ĠIt Ġwill Ġexecute Ġjust Ġlike Ċ a Ġsequence ĠâĢĵ Ġemit ting Ġone Ġquery Ġresult Ġat Ġa Ġtime Ġand Ġsus pending Ġuntil Ġit Ġis Ġasked Ġfor Ġthe Ġnext Ġone . Ċ C ancellable ĠâĢĵ ĠWhen Ġthe Ġscope Ġthat 's Ġcollecting Ġthese Ġflows Ġis Ġcancelled , ĠRoom Ġcancel s Ġob serving Ġthis Ġquery . Ċ Ġ*/ Ċ @ Dao Ċ interface ĠPl ant Dao Ġ{ ĊĠĠĠ Ġ@ Query (" SELECT Ġ* ĠFROM Ġpl ants ĠORDER ĠBY Ġname ") ĊĠĠĠ Ġfun Ġget Pl ants (): ĠLive Data < List < Plant >> ĊĊĠĠĠ Ġ@ Query (" SELECT Ġ* ĠFROM Ġpl ants ĠWHERE Ġgrow Zone Number Ġ= Ġ: grow Zone Number ĠORDER ĠBY Ġname ") ĊĠĠĠ Ġfun Ġget Pl ants With Grow Zone Number ( grow Zone Number : ĠInt ): ĠLive Data < List < Plant >> ĊĊĠĠĠ Ġ@ Query (" SELECT Ġ* Ġfrom Ġpl ants ĠORDER ĠBY Ġname ") ĊĠĠĠ Ġfun Ġget Pl ants Flow (): ĠFlow < List < Plant >> ĊĊĠĠĠ Ġ@ Query (" SELECT Ġ* Ġfrom Ġpl ants ĠWHERE Ġgrow Zone Number Ġ= Ġ: grow Zone Number ĠORDER ĠBY Ġname ") ĊĠĠĠ Ġfun Ġget Pl ants With Grow Zone Number Flow ( grow Zone Number : ĠInt ): ĠFlow < List < Plant >> ĊĊĠĠĠ Ġ@ Insert ( on Conflict Ġ= ĠOn Conflict Strategy . REPLACE ) ĊĠĠĠ Ġsuspend Ġfun Ġinsert All ( pl ants : ĠList < Plant >) Ċ } Ċ