Exercise 2 - Json, Polymorphism, List #3
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…re as classes Restaurants e CoffeeShop, usando o conceito de polimorfismo para resolver o problema. Criei também uma função prettyPrint que verifica qual classe é, e exibi na tela conforme pedido.
roubertedgar
requested changes
Mar 20, 2024
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| open class CommercialPlace( | ||
| val name: String, | ||
| val address: String, |
Contributor
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Address não é um objeto?
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| val gson = Gson() | ||
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| open class CommercialPlace( |
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Pq não usou uma Interface ou abstract Class? Dá uma estudada nisso
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| fun prettyPrint(commercialPlace: List<CommercialPlace>) { | ||
| commercialPlace.forEach { commercialPlace -> | ||
| when (commercialPlace) { | ||
| is CoffeeShop -> println("Name: ${commercialPlace.name}, Rating: ${commercialPlace.rating}, Address: ${commercialPlace.address}") | ||
| is Restaurants -> println("Name: ${commercialPlace.name}, Address: ${commercialPlace.address} Rating: ${commercialPlace.rating},") | ||
| } | ||
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| println() | ||
| } |
Contributor
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Essa função faz parte de alguma classe? Não... isso não é assim, estuda mais polimorfismo
| val json = jsonFile.readText() | ||
| //val listType = object : TypeToken<List<CommercialPlace>>() {}.type | ||
| //val commercialPlace: List<CommercialPlace> = gson.fromJson(json, listType) | ||
| val commercialPlace: List<CommercialPlace> = Gson().fromJson(json, Array<CommercialPlace>::class.java).toList() |
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Como que vc sabe que um ComercialPlace é café ou restaurante no Json? Não estou vendo nada no jSon me contando isso.
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Customized function to receive Restaurants and Cafeterias and print them, using the concept of polymorphism.