42 lines
1.4 KiB
Kotlin
42 lines
1.4 KiB
Kotlin
package at.connyduck.pixelcat.network.calladapter
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import retrofit2.Call
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import retrofit2.CallAdapter
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import retrofit2.Retrofit
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import java.lang.reflect.ParameterizedType
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import java.lang.reflect.Type
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class NetworkResponseAdapterFactory : CallAdapter.Factory() {
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override fun get(
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returnType: Type,
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annotations: Array<Annotation>,
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retrofit: Retrofit
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): CallAdapter<*, *>? {
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// suspend functions wrap the response type in `Call`
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if (Call::class.java != getRawType(returnType)) {
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return null
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}
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// check first that the return type is `ParameterizedType`
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check(returnType is ParameterizedType) {
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"return type must be parameterized as Call<NetworkResponse<<Foo>> or Call<NetworkResponse<out Foo>>"
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}
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// get the response type inside the `Call` type
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val responseType = getParameterUpperBound(0, returnType)
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// if the response type is not ApiResponse then we can't handle this type, so we return null
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if (getRawType(responseType) != NetworkResponse::class.java) {
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return null
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}
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// the response type is ApiResponse and should be parameterized
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check(responseType is ParameterizedType) { "Response must be parameterized as NetworkResponse<Foo> or NetworkResponse<out Foo>" }
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val successBodyType = getParameterUpperBound(0, responseType)
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return NetworkCallAdapter<Any>(successBodyType)
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}
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}
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