58 lines
2.1 KiB
Java
58 lines
2.1 KiB
Java
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/*
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* Copyright 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.view.inspector;
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import android.annotation.NonNull;
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import android.annotation.Nullable;
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/**
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* An inspection companion provider that finds companions as inner classes or generated code.
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*/
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public class StaticInspectionCompanionProvider implements InspectionCompanionProvider {
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/**
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* The suffix used for the generated classes and inner classes
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*/
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private static final String COMPANION_SUFFIX = "$InspectionCompanion";
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@Override
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@Nullable
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@SuppressWarnings("unchecked")
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public <T> InspectionCompanion<T> provide(@NonNull Class<T> cls) {
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final String companionName = cls.getName() + COMPANION_SUFFIX;
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try {
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final Class<InspectionCompanion<T>> companionClass =
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(Class<InspectionCompanion<T>>) cls.getClassLoader().loadClass(companionName);
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if (InspectionCompanion.class.isAssignableFrom(companionClass)) {
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return companionClass.newInstance();
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} else {
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return null;
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}
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} catch (ClassNotFoundException e) {
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return null;
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} catch (IllegalAccessException e) {
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throw new RuntimeException(e);
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} catch (InstantiationException e) {
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Throwable cause = e.getCause();
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if (cause instanceof RuntimeException) throw (RuntimeException) cause;
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if (cause instanceof Error) throw (Error) cause;
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throw new RuntimeException(cause);
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}
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}
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}
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