android-35/com/android/internal/annotations/Keep.java

/*
 * Copyright (C) 2022 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 com.android.internal.annotations;

import static java.lang.annotation.ElementType.ANNOTATION_TYPE;
import static java.lang.annotation.ElementType.CONSTRUCTOR;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.TYPE;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * Denotes that the annotated element should not be removed when
 * the code is minified at build time. This is typically used
 * on methods and classes that are accessed via reflection or JNI,
 * so a compiler may think that the code is unused.
 * <p>
 * Example:
 * <pre><code>
 *  &#64;Keep
 *  public void foo() {
 *      ...
 *  }
 * </code></pre>
 * <p>
 */
@Retention(RetentionPolicy.CLASS)
@Target({ANNOTATION_TYPE, CONSTRUCTOR, FIELD, METHOD, TYPE})
public @interface Keep {
}