/* * Copyright (c) 2015, 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 jdk.dynalink.beans; import java.lang.invoke.MethodHandle; import jdk.dynalink.DynamicLinkerFactory; import jdk.dynalink.NamedOperation; import jdk.dynalink.NoSuchDynamicMethodException; import jdk.dynalink.StandardOperation; import jdk.dynalink.linker.LinkRequest; import jdk.dynalink.linker.LinkerServices; /** * A factory for creating method handles for linking missing member behavior * in {@link BeansLinker}. BeansLinker links these method handles into guarded * invocations for link requests specifying {@code GET_*} and {@code SET_*} * {@link StandardOperation}s when it is either certain or possible that the * requested member (property, method, or element) is missing. They will be * linked both for {@link NamedOperation named} and unnamed operations. The * implementer must ensure that the parameter types of the returned method * handle match the parameter types of the call site described in the link * request. The return types can differ, though, to allow * {@link DynamicLinkerFactory#setPrelinkTransformer(jdk.dynalink.linker.GuardedInvocationTransformer)} * late return type transformations}. It is allowed to return {@code null} for a * method handle if the default behavior is sufficient. *