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PlayerAudioEngines.kt
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PlayerAudioEngines.kt
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package org.librarysimplified.audiobook.api
import org.slf4j.LoggerFactory
import java.util.ServiceLoader
/**
* An API to find engine providers for books.
*/
object PlayerAudioEngines : PlayerAudioEnginesType {
private val logger = LoggerFactory.getLogger(PlayerAudioEngines::class.java)
private val providers: MutableList<PlayerAudioEngineProviderType> =
ServiceLoader.load(PlayerAudioEngineProviderType::class.java).toMutableList()
override fun findAllFor(request: PlayerAudioEngineRequest): List<PlayerEngineAndBookProvider> {
val results = ArrayList<PlayerEngineAndBookProvider>(this.providers.size)
for (engineProvider in this.providers) {
try {
val bookProvider = engineProvider.tryRequest(request)
if (bookProvider != null) {
if (request.filter(engineProvider)) {
results.add(
PlayerEngineAndBookProvider(
engineProvider = engineProvider,
bookProvider = bookProvider
)
)
}
}
} catch (e: Exception) {
try {
this.logger.error(
"exception raised by provider {}:{} when examining manifest: ",
engineProvider.name(),
engineProvider.version(),
e
)
} catch (e: Exception) {
this.logger.error("exception raised when talking to provider: ", e)
}
}
}
return results
}
}