FileClassLoaderFactory.kt
/*
* Copyright 2022 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.privacysandbox.sdkruntime.client.loader
import android.util.Log
import androidx.privacysandbox.sdkruntime.client.config.LocalSdkConfig
import androidx.privacysandbox.sdkruntime.client.loader.storage.LocalSdkStorage
import androidx.privacysandbox.sdkruntime.client.loader.storage.toClassPathString
import dalvik.system.BaseDexClassLoader
import java.io.File
/**
* Loading SDK using BaseDexClassLoader.
* Using [LocalSdkStorage] to get SDK DEX files,
* if no files available - delegating to fallback.
*/
internal class FileClassLoaderFactory(
private val localSdkStorage: LocalSdkStorage,
private val fallback: SdkLoader.ClassLoaderFactory,
) : SdkLoader.ClassLoaderFactory {
override fun createClassLoaderFor(
sdkConfig: LocalSdkConfig,
parent: ClassLoader
): ClassLoader {
return tryCreateBaseDexClassLoaderFor(sdkConfig, parent)
?: fallback.createClassLoaderFor(
sdkConfig,
parent
)
}
private fun tryCreateBaseDexClassLoaderFor(
sdkConfig: LocalSdkConfig,
parent: ClassLoader
): ClassLoader? {
try {
val dexFiles = localSdkStorage.dexFilesFor(sdkConfig)
if (dexFiles == null) {
Log.w(
LOG_TAG,
"Can't use BaseDexClassLoader for ${sdkConfig.packageName} - no dexFiles"
)
return null
}
val optimizedDirectory = File(dexFiles.files[0].parentFile, "DexOpt")
if (!optimizedDirectory.exists()) {
optimizedDirectory.mkdirs()
}
return BaseDexClassLoader(
dexFiles.toClassPathString(),
optimizedDirectory,
/* librarySearchPath = */ null,
parent
)
} catch (ex: Exception) {
Log.e(
LOG_TAG,
"Failed to use BaseDexClassLoader for ${sdkConfig.packageName} - exception",
ex
)
return null
}
}
companion object {
const val LOG_TAG =
"FileClassLoaderFactory"
}
}