attila@90: /*
attila@90:  * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
attila@90:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
attila@90:  *
attila@90:  * This code is free software; you can redistribute it and/or modify it
attila@90:  * under the terms of the GNU General Public License version 2 only, as
attila@90:  * published by the Free Software Foundation.  Oracle designates this
attila@90:  * particular file as subject to the "Classpath" exception as provided
attila@90:  * by Oracle in the LICENSE file that accompanied this code.
attila@90:  *
attila@90:  * This code is distributed in the hope that it will be useful, but WITHOUT
attila@90:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
attila@90:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
attila@90:  * version 2 for more details (a copy is included in the LICENSE file that
attila@90:  * accompanied this code).
attila@90:  *
attila@90:  * You should have received a copy of the GNU General Public License version
attila@90:  * 2 along with this work; if not, write to the Free Software Foundation,
attila@90:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
attila@90:  *
attila@90:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
attila@90:  * or visit www.oracle.com if you need additional information or have any
attila@90:  * questions.
attila@90:  */
attila@90: 
attila@90: /*
attila@90:  * This file is available under and governed by the GNU General Public
attila@90:  * License version 2 only, as published by the Free Software Foundation.
attila@90:  * However, the following notice accompanied the original version of this
attila@90:  * file, and Oracle licenses the original version of this file under the BSD
attila@90:  * license:
attila@90:  */
attila@90: /*
attila@90:    Copyright 2009-2013 Attila Szegedi
attila@90: 
attila@90:    Licensed under both the Apache License, Version 2.0 (the "Apache License")
attila@90:    and the BSD License (the "BSD License"), with licensee being free to
attila@90:    choose either of the two at their discretion.
attila@90: 
attila@90:    You may not use this file except in compliance with either the Apache
attila@90:    License or the BSD License.
attila@90: 
attila@90:    If you choose to use this file in compliance with the Apache License, the
attila@90:    following notice applies to you:
attila@90: 
attila@90:        You may obtain a copy of the Apache License at
attila@90: 
attila@90:            http://www.apache.org/licenses/LICENSE-2.0
attila@90: 
attila@90:        Unless required by applicable law or agreed to in writing, software
attila@90:        distributed under the License is distributed on an "AS IS" BASIS,
attila@90:        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
attila@90:        implied. See the License for the specific language governing
attila@90:        permissions and limitations under the License.
attila@90: 
attila@90:    If you choose to use this file in compliance with the BSD License, the
attila@90:    following notice applies to you:
attila@90: 
attila@90:        Redistribution and use in source and binary forms, with or without
attila@90:        modification, are permitted provided that the following conditions are
attila@90:        met:
attila@90:        * Redistributions of source code must retain the above copyright
attila@90:          notice, this list of conditions and the following disclaimer.
attila@90:        * Redistributions in binary form must reproduce the above copyright
attila@90:          notice, this list of conditions and the following disclaimer in the
attila@90:          documentation and/or other materials provided with the distribution.
attila@90:        * Neither the name of the copyright holder nor the names of
attila@90:          contributors may be used to endorse or promote products derived from
attila@90:          this software without specific prior written permission.
attila@90: 
attila@90:        THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
attila@90:        IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
attila@90:        TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
attila@90:        PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER
attila@90:        BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
attila@90:        CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
attila@90:        SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
attila@90:        BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
attila@90:        WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
attila@90:        OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
attila@90:        ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
attila@90: */
attila@90: 
attila@90: package jdk.internal.dynalink;
attila@90: 
attila@90: import java.lang.invoke.CallSite;
attila@90: import java.lang.invoke.MethodHandles;
attila@90: import java.lang.invoke.MethodType;
attila@90: import jdk.internal.dynalink.support.CallSiteDescriptorFactory;
attila@90: 
attila@90: /**
attila@90:  * A convenience default bootstrapper that exposes static bootstrap methods which language runtimes that need the very
attila@90:  * default behavior can use with minimal setup. When first referenced, it will create a dynamic linker with default
attila@90:  * settings for the {@link DynamicLinkerFactory}, and its bootstrap methods will create {@link MonomorphicCallSite} for
attila@90:  * all call sites. It has two bootstrap methods: one creates call sites that use the
attila@90:  * {@link MethodHandles#publicLookup()} as the lookup for all call sites and disregard the one passed in as the caller,
attila@90:  * and one that just uses the passed caller as the lookup scope. Using the public lookup one is advised if your language
attila@90:  * runtime has no concept of interacting with Java visibility scopes, as it results in a more lightweight runtime
attila@90:  * information.
attila@90:  *
attila@90:  * @author Attila Szegedi
attila@90:  */
attila@90: public class DefaultBootstrapper {
attila@90:     private static final DynamicLinker dynamicLinker = new DynamicLinkerFactory().createLinker();
attila@90: 
attila@90:     private DefaultBootstrapper() {
attila@90:     }
attila@90: 
attila@90:     /**
attila@90:      * Use this method as your bootstrap method (see the documentation of the java.lang.invoke package for how to do
attila@90:      * this). In case your language runtime doesn't have a concept of interaction with Java access scopes, you might
attila@90:      * want to consider using
attila@90:      * {@link #publicBootstrap(java.lang.invoke.MethodHandles.Lookup, String, MethodType)} instead.
attila@90:      *
attila@90:      * @param caller the caller's lookup
attila@90:      * @param name the name of the method at the call site
attila@90:      * @param type the method signature at the call site
attila@90:      * @return a new {@link MonomorphicCallSite} linked with the default dynamic linker.
attila@90:      */
attila@962:     public static CallSite bootstrap(final MethodHandles.Lookup caller, final String name, final MethodType type) {
attila@90:         return bootstrapInternal(caller, name, type);
attila@90:     }
attila@90: 
attila@90:     /**
attila@90:      * Use this method as your bootstrap method (see the documentation of the java.lang.invoke package for how to do
attila@90:      * this) when your language runtime doesn't have a concept of interaction with Java access scopes. If you need to
attila@90:      * preserve the different caller Lookup objects in the call sites, use
attila@90:      * {@link #bootstrap(java.lang.invoke.MethodHandles.Lookup, String, MethodType)} instead
attila@90:      *
attila@90:      * @param caller the caller's lookup. It is ignored as the call sites will be created with
attila@90:      * {@link MethodHandles#publicLookup()} instead.
attila@90:      * @param name the name of the method at the call site
attila@90:      * @param type the method signature at the call site
attila@90:      * @return a new {@link MonomorphicCallSite} linked with the default dynamic linker.
attila@90:      */
attila@962:     public static CallSite publicBootstrap(final MethodHandles.Lookup caller, final String name, final MethodType type) {
attila@90:         return bootstrapInternal(MethodHandles.publicLookup(), name, type);
attila@90:     }
attila@90: 
attila@962:     private static CallSite bootstrapInternal(final MethodHandles.Lookup caller, final String name, final MethodType type) {
attila@90:         return dynamicLinker.link(new MonomorphicCallSite(CallSiteDescriptorFactory.create(caller, name, type)));
attila@90:     }
attila@101: }