IntentMonitorRegistry.java
/*
* Copyright (C) 2015 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.test.runner.intent;
import java.util.concurrent.atomic.AtomicReference;
/** Exposes an implementation of {@link IntentMonitor} to users. */
public final class IntentMonitorRegistry {
private static final AtomicReference<IntentMonitor> monitorRef =
new AtomicReference<IntentMonitor>(null);
/**
* Returns the IntentMonitor. This monitor is not guaranteed to be present under all'
* instrumentations.
*
* @throws IllegalStateException if no monitor has been registered.
*/
public static IntentMonitor getInstance() {
IntentMonitor instance = monitorRef.get();
if (null == instance) {
throw new IllegalStateException(
"No intent monitor registered! Are you running under an "
+ "Instrumentation which registers intent monitors?");
}
return instance;
}
/**
* Stores the given {@link IntentMonitor} instance in the registry. Passing null removes the
* monitor from the registry.
*/
public static void registerInstance(IntentMonitor monitor) {
monitorRef.set(monitor);
}
private IntentMonitorRegistry() {
// no instance
}
}