49 lines
1.5 KiB
Java
49 lines
1.5 KiB
Java
/*
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* Copyright (C) 2014 The Dagger Authors.
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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 dagger.internal;
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import static dagger.internal.Preconditions.checkNotNull;
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import dagger.MembersInjector;
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import javax.inject.Inject;
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/**
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* Basic {@link MembersInjector} implementations used by the framework.
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*/
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public final class MembersInjectors {
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/**
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* Returns a {@link MembersInjector} implementation that injects no members
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*
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* <p>Note that there is no verification that the type being injected does not have {@link Inject}
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* members, so care should be taken to ensure appropriate use.
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*/
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@SuppressWarnings("unchecked")
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public static <T> MembersInjector<T> noOp() {
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return (MembersInjector<T>) NoOpMembersInjector.INSTANCE;
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}
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private static enum NoOpMembersInjector implements MembersInjector<Object> {
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INSTANCE;
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@Override public void injectMembers(Object instance) {
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checkNotNull(instance, "Cannot inject members into a null reference");
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}
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}
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private MembersInjectors() {}
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}
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