--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/nashorn/src/jdk/internal/dynalink/linker/LinkRequest.java Thu Feb 14 13:22:26 2013 +0100
@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) 2010, 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.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file, and Oracle licenses the original version of this file under the BSD
+ * license:
+ */
+/*
+ Copyright 2009-2013 Attila Szegedi
+
+ Licensed under both the Apache License, Version 2.0 (the "Apache License")
+ and the BSD License (the "BSD License"), with licensee being free to
+ choose either of the two at their discretion.
+
+ You may not use this file except in compliance with either the Apache
+ License or the BSD License.
+
+ If you choose to use this file in compliance with the Apache License, the
+ following notice applies to you:
+
+ You may obtain a copy of the Apache 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.
+
+ If you choose to use this file in compliance with the BSD License, the
+ following notice applies to you:
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are
+ met:
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+ * Neither the name of the copyright holder nor the names of
+ contributors may be used to endorse or promote products derived from
+ this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER
+ BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+package jdk.internal.dynalink.linker;
+
+import jdk.internal.dynalink.CallSiteDescriptor;
+import jdk.internal.dynalink.DynamicLinkerFactory;
+
+/**
+ * Represents a request to link a particular invocation at a particular call site. Instances of these requests are being
+ * passed to {@link GuardingDynamicLinker}.
+ *
+ * @author Attila Szegedi
+ */
+public interface LinkRequest {
+ /**
+ * Returns the call site descriptor for the call site being linked.
+ *
+ * @return the call site descriptor for the call site being linked.
+ */
+ public CallSiteDescriptor getCallSiteDescriptor();
+
+ /**
+ * Returns the arguments for the invocation being linked. The returned array is a clone; modifications to it won't
+ * affect the arguments in this request.
+ *
+ * @return the arguments for the invocation being linked.
+ */
+ public Object[] getArguments();
+
+ /**
+ * Returns the 0th argument for the invocation being linked; this is typically the receiver object.
+ *
+ * @return the receiver object.
+ */
+ public Object getReceiver();
+
+ /**
+ * Returns true if the call site is considered unstable, that is, it has been relinked more times than was
+ * specified in {@link DynamicLinkerFactory#setUnstableRelinkThreshold(int)}. Linkers should use this as a
+ * hint to prefer producing linkage that is more stable (its guard fails less frequently), even if that assumption
+ * causes a less effective version of an operation to be linked. This is just a hint, of course, and linkers are
+ * free to ignore this property.
+ * @return true if the call site is considered unstable.
+ */
+ public boolean isCallSiteUnstable();
+
+ /**
+ * Returns a request stripped from runtime context arguments. Some language runtimes will include runtime-specific
+ * context parameters in their call sites as few arguments between 0th argument "this" and the normal arguments. If
+ * a linker does not recognize such contexts at all, or does not recognize the call site as one with its own
+ * context, it can ask for the alternative link request with context parameters and arguments removed, and link
+ * against it instead.
+ *
+ * @return the context-stripped request. If the link request does not have any language runtime specific context
+ * parameters, the same link request is returned.
+ */
+ public LinkRequest withoutRuntimeContext();
+
+ /**
+ * Returns a request identical to this one with call site descriptor and arguments replaced with the ones specified.
+ *
+ * @param callSiteDescriptor the new call site descriptor
+ * @param arguments the new arguments
+ * @return a new request identical to this one, except with the call site descriptor and arguments replaced with the
+ * specified ones.
+ */
+ public LinkRequest replaceArguments(CallSiteDescriptor callSiteDescriptor, Object[] arguments);
+}
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