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/*
* Copyright 2019 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 android.view.inspector;
import android.annotation.NonNull;
import android.annotation.Nullable;
/**
* An inspection companion provider that finds companions as inner classes or generated code.
*/
public class StaticInspectionCompanionProvider implements InspectionCompanionProvider {
/**
* The suffix used for the generated classes and inner classes
*/
private static final String COMPANION_SUFFIX = "$InspectionCompanion";
@Override
@Nullable
@SuppressWarnings("unchecked")
public <T> InspectionCompanion<T> provide(@NonNull Class<T> cls) {
final String companionName = cls.getName() + COMPANION_SUFFIX;
try {
final Class<InspectionCompanion<T>> companionClass =
(Class<InspectionCompanion<T>>) cls.getClassLoader().loadClass(companionName);
if (InspectionCompanion.class.isAssignableFrom(companionClass)) {
return companionClass.newInstance();
} else {
return null;
}
} catch (ClassNotFoundException e) {
return null;
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
} catch (InstantiationException e) {
Throwable cause = e.getCause();
if (cause instanceof RuntimeException) throw (RuntimeException) cause;
if (cause instanceof Error) throw (Error) cause;
throw new RuntimeException(cause);
}
}
}
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