| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| |
| package java.lang.reflect; |
| |
| |
| /** |
| * {@code Proxy} provides static methods for creating dynamic proxy |
| * classes and instances, and it is also the superclass of all |
| * dynamic proxy classes created by those methods. |
| * |
| * <p>To create a proxy for some interface {@code Foo}: |
| * <pre> |
| * InvocationHandler handler = new MyInvocationHandler(...); |
| * Class<?> proxyClass = Proxy.getProxyClass(Foo.class.getClassLoader(), Foo.class); |
| * Foo f = (Foo) proxyClass.getConstructor(InvocationHandler.class). |
| * newInstance(handler); |
| * </pre> |
| * or more simply: |
| * <pre> |
| * Foo f = (Foo) Proxy.newProxyInstance(Foo.class.getClassLoader(), |
| * new Class<?>[] { Foo.class }, |
| * handler); |
| * </pre> |
| * |
| * <p>A <i>dynamic proxy class</i> (simply referred to as a <i>proxy |
| * class</i> below) is a class that implements a list of interfaces |
| * specified at runtime when the class is created, with behavior as |
| * described below. |
| * |
| * A <i>proxy interface</i> is such an interface that is implemented |
| * by a proxy class. |
| * |
| * A <i>proxy instance</i> is an instance of a proxy class. |
| * |
| * Each proxy instance has an associated <i>invocation handler</i> |
| * object, which implements the interface {@link java.lang.reflect.InvocationHandler InvocationHandler}. |
| * A method invocation on a proxy instance through one of its proxy |
| * interfaces will be dispatched to the {@link java.lang.reflect.InvocationHandler#invoke InvocationHandler#invoke} method of the instance's invocation handler, passing the proxy |
| * instance, a {@code java.lang.reflect.Method} object identifying |
| * the method that was invoked, and an array of type {@code Object} |
| * containing the arguments. The invocation handler processes the |
| * encoded method invocation as appropriate and the result that it |
| * returns will be returned as the result of the method invocation on |
| * the proxy instance. |
| * |
| * <p>A proxy class has the following properties: |
| * |
| * <ul> |
| * <li>Proxy classes are <em>public, final, and not abstract</em> if |
| * all proxy interfaces are public.</li> |
| * |
| * <li>Proxy classes are <em>non-public, final, and not abstract</em> if |
| * any of the proxy interfaces is non-public.</li> |
| * |
| * <li>The unqualified name of a proxy class is unspecified. The space |
| * of class names that begin with the string {@code "$Proxy"} |
| * should be, however, reserved for proxy classes. |
| * |
| * <li>A proxy class extends {@code java.lang.reflect.Proxy}. |
| * |
| * <li>A proxy class implements exactly the interfaces specified at its |
| * creation, in the same order. |
| * |
| * <li>If a proxy class implements a non-public interface, then it will |
| * be defined in the same package as that interface. Otherwise, the |
| * package of a proxy class is also unspecified. Note that package |
| * sealing will not prevent a proxy class from being successfully defined |
| * in a particular package at runtime, and neither will classes already |
| * defined by the same class loader and the same package with particular |
| * signers. |
| * |
| * <li>Since a proxy class implements all of the interfaces specified at |
| * its creation, invoking {@code getInterfaces} on its |
| * {@code Class} object will return an array containing the same |
| * list of interfaces (in the order specified at its creation), invoking |
| * {@code getMethods} on its {@code Class} object will return |
| * an array of {@code Method} objects that include all of the |
| * methods in those interfaces, and invoking {@code getMethod} will |
| * find methods in the proxy interfaces as would be expected. |
| * |
| * <li>The {@link java.lang.reflect.Proxy#isProxyClass Proxy#isProxyClass} method will |
| * return true if it is passed a proxy class-- a class returned by |
| * {@code Proxy.getProxyClass} or the class of an object returned by |
| * {@code Proxy.newProxyInstance}-- and false otherwise. |
| * |
| * <li>The {@code java.security.ProtectionDomain} of a proxy class |
| * is the same as that of system classes loaded by the bootstrap class |
| * loader, such as {@code java.lang.Object}, because the code for a |
| * proxy class is generated by trusted system code. This protection |
| * domain will typically be granted |
| * {@code java.security.AllPermission}. |
| * |
| * <li>Each proxy class has one public constructor that takes one argument, |
| * an implementation of the interface {@link java.lang.reflect.InvocationHandler InvocationHandler}, to set |
| * the invocation handler for a proxy instance. Rather than having to use |
| * the reflection API to access the public constructor, a proxy instance |
| * can be also be created by calling the {@link java.lang.reflect.Proxy#newProxyInstance Proxy#newProxyInstance} method, which combines the actions of calling |
| * {@link java.lang.reflect.Proxy#getProxyClass Proxy#getProxyClass} with invoking the |
| * constructor with an invocation handler. |
| * </ul> |
| * |
| * <p>A proxy instance has the following properties: |
| * |
| * <ul> |
| * <li>Given a proxy instance {@code proxy} and one of the |
| * interfaces implemented by its proxy class {@code Foo}, the |
| * following expression will return true: |
| * <pre> |
| * {@code proxy instanceof Foo} |
| * </pre> |
| * and the following cast operation will succeed (rather than throwing |
| * a {@code ClassCastException}): |
| * <pre> |
| * {@code (Foo) proxy} |
| * </pre> |
| * |
| * <li>Each proxy instance has an associated invocation handler, the one |
| * that was passed to its constructor. The static |
| * {@link java.lang.reflect.Proxy#getInvocationHandler Proxy#getInvocationHandler} method |
| * will return the invocation handler associated with the proxy instance |
| * passed as its argument. |
| * |
| * <li>An interface method invocation on a proxy instance will be |
| * encoded and dispatched to the invocation handler's {@link java.lang.reflect.InvocationHandler#invoke InvocationHandler#invoke} method as described in the |
| * documentation for that method. |
| * |
| * <li>An invocation of the {@code hashCode}, |
| * {@code equals}, or {@code toString} methods declared in |
| * {@code java.lang.Object} on a proxy instance will be encoded and |
| * dispatched to the invocation handler's {@code invoke} method in |
| * the same manner as interface method invocations are encoded and |
| * dispatched, as described above. The declaring class of the |
| * {@code Method} object passed to {@code invoke} will be |
| * {@code java.lang.Object}. Other public methods of a proxy |
| * instance inherited from {@code java.lang.Object} are not |
| * overridden by a proxy class, so invocations of those methods behave |
| * like they do for instances of {@code java.lang.Object}. |
| * </ul> |
| * |
| * <h3>Methods Duplicated in Multiple Proxy Interfaces</h3> |
| * |
| * <p>When two or more interfaces of a proxy class contain a method with |
| * the same name and parameter signature, the order of the proxy class's |
| * interfaces becomes significant. When such a <i>duplicate method</i> |
| * is invoked on a proxy instance, the {@code Method} object passed |
| * to the invocation handler will not necessarily be the one whose |
| * declaring class is assignable from the reference type of the interface |
| * that the proxy's method was invoked through. This limitation exists |
| * because the corresponding method implementation in the generated proxy |
| * class cannot determine which interface it was invoked through. |
| * Therefore, when a duplicate method is invoked on a proxy instance, |
| * the {@code Method} object for the method in the foremost interface |
| * that contains the method (either directly or inherited through a |
| * superinterface) in the proxy class's list of interfaces is passed to |
| * the invocation handler's {@code invoke} method, regardless of the |
| * reference type through which the method invocation occurred. |
| * |
| * <p>If a proxy interface contains a method with the same name and |
| * parameter signature as the {@code hashCode}, {@code equals}, |
| * or {@code toString} methods of {@code java.lang.Object}, |
| * when such a method is invoked on a proxy instance, the |
| * {@code Method} object passed to the invocation handler will have |
| * {@code java.lang.Object} as its declaring class. In other words, |
| * the public, non-final methods of {@code java.lang.Object} |
| * logically precede all of the proxy interfaces for the determination of |
| * which {@code Method} object to pass to the invocation handler. |
| * |
| * <p>Note also that when a duplicate method is dispatched to an |
| * invocation handler, the {@code invoke} method may only throw |
| * checked exception types that are assignable to one of the exception |
| * types in the {@code throws} clause of the method in <i>all</i> of |
| * the proxy interfaces that it can be invoked through. If the |
| * {@code invoke} method throws a checked exception that is not |
| * assignable to any of the exception types declared by the method in one |
| * of the proxy interfaces that it can be invoked through, then an |
| * unchecked {@code UndeclaredThrowableException} will be thrown by |
| * the invocation on the proxy instance. This restriction means that not |
| * all of the exception types returned by invoking |
| * {@code getExceptionTypes} on the {@code Method} object |
| * passed to the {@code invoke} method can necessarily be thrown |
| * successfully by the {@code invoke} method. |
| * |
| * @author Peter Jones |
| * @see java.lang.reflect.InvocationHandler |
| * @since 1.3 |
| */ |
| |
| @SuppressWarnings({"unchecked", "deprecation", "all"}) |
| public class Proxy implements java.io.Serializable { |
| |
| /** |
| * Constructs a new {@code Proxy} instance from a subclass |
| * (typically, a dynamic proxy class) with the specified value |
| * for its invocation handler. |
| * |
| * @param h the invocation handler for this proxy instance |
| * |
| * @throws java.lang.NullPointerException if the given invocation handler, {@code h}, |
| * is {@code null}. |
| */ |
| |
| protected Proxy(@android.annotation.NonNull java.lang.reflect.InvocationHandler h) { throw new RuntimeException("Stub!"); } |
| |
| /** |
| * Returns the {@code java.lang.Class} object for a proxy class |
| * given a class loader and an array of interfaces. The proxy class |
| * will be defined by the specified class loader and will implement |
| * all of the supplied interfaces. If any of the given interfaces |
| * is non-public, the proxy class will be non-public. If a proxy class |
| * for the same permutation of interfaces has already been defined by the |
| * class loader, then the existing proxy class will be returned; otherwise, |
| * a proxy class for those interfaces will be generated dynamically |
| * and defined by the class loader. |
| * |
| * <p>There are several restrictions on the parameters that may be |
| * passed to {@code Proxy.getProxyClass}: |
| * |
| * <ul> |
| * <li>All of the {@code Class} objects in the |
| * {@code interfaces} array must represent interfaces, not |
| * classes or primitive types. |
| * |
| * <li>No two elements in the {@code interfaces} array may |
| * refer to identical {@code Class} objects. |
| * |
| * <li>All of the interface types must be visible by name through the |
| * specified class loader. In other words, for class loader |
| * {@code cl} and every interface {@code i}, the following |
| * expression must be true: |
| * <pre> |
| * Class.forName(i.getName(), false, cl) == i |
| * </pre> |
| * |
| * <li>All non-public interfaces must be in the same package; |
| * otherwise, it would not be possible for the proxy class to |
| * implement all of the interfaces, regardless of what package it is |
| * defined in. |
| * |
| * <li>For any set of member methods of the specified interfaces |
| * that have the same signature: |
| * <ul> |
| * <li>If the return type of any of the methods is a primitive |
| * type or void, then all of the methods must have that same |
| * return type. |
| * <li>Otherwise, one of the methods must have a return type that |
| * is assignable to all of the return types of the rest of the |
| * methods. |
| * </ul> |
| * |
| * <li>The resulting proxy class must not exceed any limits imposed |
| * on classes by the virtual machine. For example, the VM may limit |
| * the number of interfaces that a class may implement to 65535; in |
| * that case, the size of the {@code interfaces} array must not |
| * exceed 65535. |
| * </ul> |
| * |
| * <p>If any of these restrictions are violated, |
| * {@code Proxy.getProxyClass} will throw an |
| * {@code IllegalArgumentException}. If the {@code interfaces} |
| * array argument or any of its elements are {@code null}, a |
| * {@code NullPointerException} will be thrown. |
| * |
| * <p>Note that the order of the specified proxy interfaces is |
| * significant: two requests for a proxy class with the same combination |
| * of interfaces but in a different order will result in two distinct |
| * proxy classes. |
| * |
| * @param loader the class loader to define the proxy class |
| * @param interfaces the list of interfaces for the proxy class |
| * to implement |
| * @return a proxy class that is defined in the specified class loader |
| * and that implements the specified interfaces |
| * @throws java.lang.IllegalArgumentException if any of the restrictions on the |
| * parameters that may be passed to {@code getProxyClass} |
| * are violated |
| * @throws java.lang.SecurityException if a security manager, <em>s</em>, is present |
| * and any of the following conditions is met: |
| * <ul> |
| * <li> the given {@code loader} is {@code null} and |
| * the caller's class loader is not {@code null} and the |
| * invocation of {@link java.lang.SecurityManager#checkPermission SecurityManager#checkPermission} with |
| * {@code RuntimePermission("getClassLoader")} permission |
| * denies access.</li> |
| * <li> for each proxy interface, {@code intf}, |
| * the caller's class loader is not the same as or an |
| * ancestor of the class loader for {@code intf} and |
| * invocation of {@link java.lang.SecurityManager#checkPackageAccess SecurityManager#checkPackageAccess} denies access to {@code intf}.</li> |
| * </ul> |
| * @throws java.lang.NullPointerException if the {@code interfaces} array |
| * argument or any of its elements are {@code null} |
| */ |
| |
| @android.annotation.NonNull |
| public static java.lang.Class<?> getProxyClass(@android.annotation.Nullable java.lang.ClassLoader loader, @android.annotation.NonNull java.lang.Class<?>... interfaces) throws java.lang.IllegalArgumentException { throw new RuntimeException("Stub!"); } |
| |
| /** |
| * Returns an instance of a proxy class for the specified interfaces |
| * that dispatches method invocations to the specified invocation |
| * handler. |
| * |
| * <p>{@code Proxy.newProxyInstance} throws |
| * {@code IllegalArgumentException} for the same reasons that |
| * {@code Proxy.getProxyClass} does. |
| * |
| * @param loader the class loader to define the proxy class |
| * @param interfaces the list of interfaces for the proxy class |
| * to implement |
| * @param h the invocation handler to dispatch method invocations to |
| * @return a proxy instance with the specified invocation handler of a |
| * proxy class that is defined by the specified class loader |
| * and that implements the specified interfaces |
| * @throws java.lang.IllegalArgumentException if any of the restrictions on the |
| * parameters that may be passed to {@code getProxyClass} |
| * are violated |
| * @throws java.lang.SecurityException if a security manager, <em>s</em>, is present |
| * and any of the following conditions is met: |
| * <ul> |
| * <li> the given {@code loader} is {@code null} and |
| * the caller's class loader is not {@code null} and the |
| * invocation of {@link java.lang.SecurityManager#checkPermission SecurityManager#checkPermission} with |
| * {@code RuntimePermission("getClassLoader")} permission |
| * denies access;</li> |
| * <li> for each proxy interface, {@code intf}, |
| * the caller's class loader is not the same as or an |
| * ancestor of the class loader for {@code intf} and |
| * invocation of {@link java.lang.SecurityManager#checkPackageAccess SecurityManager#checkPackageAccess} denies access to {@code intf};</li> |
| * <li> any of the given proxy interfaces is non-public and the |
| * caller class is not in the same {@linkplain java.lang.Package Package} |
| * as the non-public interface and the invocation of |
| * {@link java.lang.SecurityManager#checkPermission SecurityManager#checkPermission} with |
| * {@code ReflectPermission("newProxyInPackage.{package name}")} |
| * permission denies access.</li> |
| * </ul> |
| * @throws java.lang.NullPointerException if the {@code interfaces} array |
| * argument or any of its elements are {@code null}, or |
| * if the invocation handler, {@code h}, is |
| * {@code null} |
| */ |
| |
| @android.annotation.NonNull |
| public static java.lang.Object newProxyInstance(@android.annotation.Nullable java.lang.ClassLoader loader, @android.annotation.NonNull java.lang.Class<?>[] interfaces, @android.annotation.NonNull java.lang.reflect.InvocationHandler h) throws java.lang.IllegalArgumentException { throw new RuntimeException("Stub!"); } |
| |
| /** |
| * Returns true if and only if the specified class was dynamically |
| * generated to be a proxy class using the {@code getProxyClass} |
| * method or the {@code newProxyInstance} method. |
| * |
| * <p>The reliability of this method is important for the ability |
| * to use it to make security decisions, so its implementation should |
| * not just test if the class in question extends {@code Proxy}. |
| * |
| * @param cl the class to test |
| * @return {@code true} if the class is a proxy class and |
| * {@code false} otherwise |
| * @throws java.lang.NullPointerException if {@code cl} is {@code null} |
| */ |
| |
| public static boolean isProxyClass(@android.annotation.NonNull java.lang.Class<?> cl) { throw new RuntimeException("Stub!"); } |
| |
| /** |
| * Returns the invocation handler for the specified proxy instance. |
| * |
| * @param proxy the proxy instance to return the invocation handler for |
| * @return the invocation handler for the proxy instance |
| * @throws java.lang.IllegalArgumentException if the argument is not a |
| * proxy instance |
| * @throws java.lang.SecurityException if a security manager, <em>s</em>, is present |
| * and the caller's class loader is not the same as or an |
| * ancestor of the class loader for the invocation handler |
| * and invocation of {@link java.lang.SecurityManager#checkPackageAccess SecurityManager#checkPackageAccess} denies access to the invocation |
| * handler's class. |
| */ |
| |
| @android.annotation.NonNull |
| public static java.lang.reflect.InvocationHandler getInvocationHandler(@android.annotation.NonNull java.lang.Object proxy) throws java.lang.IllegalArgumentException { throw new RuntimeException("Stub!"); } |
| |
| /** |
| * the invocation handler for this proxy instance. |
| * @serial |
| */ |
| |
| protected java.lang.reflect.InvocationHandler h; |
| } |
| |
