SdkActivityHandlerWrapper.kt
/*
* Copyright 2023 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.impl.injector
import android.annotation.SuppressLint
import androidx.privacysandbox.sdkruntime.core.activity.ActivityHolder
import androidx.privacysandbox.sdkruntime.core.activity.SdkSandboxActivityHandlerCompat
import java.lang.reflect.Method
/**
* Creates reflection wrapper for implementation of [SdkSandboxActivityHandlerCompat] interface
* loaded by SDK classloader.
*/
internal class SdkActivityHandlerWrapper private constructor(
private val activityHolderProxyFactory: ActivityHolderProxyFactory,
private val handlerOnActivityCreatedMethod: Method,
) {
fun wrapSdkSandboxActivityHandlerCompat(handlerCompat: Any): SdkSandboxActivityHandlerCompat =
WrappedHandler(handlerCompat, handlerOnActivityCreatedMethod, activityHolderProxyFactory)
private class WrappedHandler(
private val originalHandler: Any,
private val handlerOnActivityCreatedMethod: Method,
private val activityHolderProxyFactory: ActivityHolderProxyFactory
) : SdkSandboxActivityHandlerCompat {
@SuppressLint("BanUncheckedReflection") // using reflection on library classes
override fun onActivityCreated(activityHolder: ActivityHolder) {
val activityHolderProxy = activityHolderProxyFactory.createProxyFor(activityHolder)
handlerOnActivityCreatedMethod.invoke(originalHandler, activityHolderProxy)
}
}
companion object {
fun createFor(classLoader: ClassLoader): SdkActivityHandlerWrapper {
val sdkSandboxActivityHandlerCompatClass = Class.forName(
SdkSandboxActivityHandlerCompat::class.java.name,
/* initialize = */ false,
classLoader
)
val activityHolderClass = Class.forName(
ActivityHolder::class.java.name,
/* initialize = */ false,
classLoader
)
val handlerOnActivityCreatedMethod =
sdkSandboxActivityHandlerCompatClass.getMethod(
"onActivityCreated",
activityHolderClass
)
val activityHolderProxyFactory = ActivityHolderProxyFactory.createFor(classLoader)
return SdkActivityHandlerWrapper(
activityHolderProxyFactory = activityHolderProxyFactory,
handlerOnActivityCreatedMethod = handlerOnActivityCreatedMethod
)
}
}
}