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/*
 * Copyright (C) 2017 The Gson authors
 *
 * 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.google.gson.internal.reflect;

import java.lang.reflect.AccessibleObject;

import com.google.gson.internal.JavaVersion;

/**
 * Provides a replacement for {@link AccessibleObject#setAccessible(boolean)}, which may be used to
 * avoid reflective access issues appeared in Java 9, like {@link java.lang.reflect.InaccessibleObjectException}
 * thrown or warnings like
 * 
 *   WARNING: An illegal reflective access operation has occurred
 *   WARNING: Illegal reflective access by ...
 * 
*

* Works both for Java 9 and earlier Java versions. */ public abstract class ReflectionAccessor { // the singleton instance, use getInstance() to obtain private static final ReflectionAccessor instance = JavaVersion.getMajorJavaVersion() < 9 ? new PreJava9ReflectionAccessor() : new UnsafeReflectionAccessor(); /** * Does the same as {@code ao.setAccessible(true)}, but never throws * {@link java.lang.reflect.InaccessibleObjectException} */ public abstract void makeAccessible(AccessibleObject ao); /** * Obtains a {@link ReflectionAccessor} instance suitable for the current Java version. *

* You may need one a reflective operation in your code throws {@link java.lang.reflect.InaccessibleObjectException}. * In such a case, use {@link ReflectionAccessor#makeAccessible(AccessibleObject)} on a field, method or constructor * (instead of basic {@link AccessibleObject#setAccessible(boolean)}). */ public static ReflectionAccessor getInstance() { return instance; } }





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