--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/nashorn/src/jdk/internal/dynalink/beans/DynamicMethod.java Thu Feb 14 13:22:26 2013 +0100
@@ -0,0 +1,169 @@
+/*
+ * 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.beans;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+import java.util.StringTokenizer;
+import jdk.internal.dynalink.linker.LinkerServices;
+
+
+/**
+ * Represents a single dynamic method. A "dynamic" method can be bound to a single Java method, or can be bound to all
+ * overloaded methods of the same name on a class. Getting an invocation of a dynamic method bound to multiple
+ * overloaded methods will perform overload resolution (actually, it will perform partial overloaded resolution at link
+ * time, but if that fails to identify exactly one target method, it will generate a method handle that will perform the
+ * rest of the overload resolution at invocation time for actual argument types).
+ *
+ * @author Attila Szegedi
+ */
+abstract class DynamicMethod {
+ private final String name;
+
+ DynamicMethod(String name) {
+ this.name = name;
+ }
+
+ String getName() {
+ return name;
+ }
+
+ /**
+ * Creates an invocation for the dynamic method. If the method is overloaded, it will perform overloaded method
+ * resolution based on the specified method type. The resulting resolution can either identify a single method to be
+ * invoked among the overloads, or it can identify multiple ones. In the latter case, the returned method handle
+ * will perform further overload resolution among these candidates at every invocation. If the method to be invoked
+ * is a variable arguments (vararg) method, it will pack the extra arguments in an array before the invocation of
+ * the underlying method if it is not already done.
+ *
+ * @param callSiteType the method type at a call site
+ * @param linkerServices linker services. Used for language-specific type conversions.
+ * @return an invocation suitable for calling the method from the specified call site.
+ */
+ abstract MethodHandle getInvocation(MethodType callSiteType, LinkerServices linkerServices);
+
+ /**
+ * Returns a simple dynamic method representing a single underlying Java method (possibly selected among several
+ * overloads) with formal parameter types exactly matching the passed signature.
+ * @param paramTypes the comma-separated list of requested parameter type names. The names will match both
+ * qualified and unqualified type names.
+ * @return a simple dynamic method representing a single underlying Java method, or null if none of the Java methods
+ * behind this dynamic method exactly match the requested parameter types.
+ */
+ abstract SimpleDynamicMethod getMethodForExactParamTypes(String paramTypes);
+
+ /**
+ * True if this dynamic method already contains a method handle with an identical signature as the passed in method
+ * handle.
+ * @param mh the method handle to check
+ * @return true if it already contains an equivalent method handle.
+ */
+ abstract boolean contains(MethodHandle mh);
+
+ static boolean typeMatchesDescription(String paramTypes, MethodType type) {
+ final StringTokenizer tok = new StringTokenizer(paramTypes, ", ");
+ for(int i = 1; i < type.parameterCount(); ++i) { // i = 1 as we ignore the receiver
+ if(!(tok.hasMoreTokens() && typeNameMatches(tok.nextToken(), type.parameterType(i)))) {
+ return false;
+ }
+ }
+ return !tok.hasMoreTokens();
+ }
+
+ private static boolean typeNameMatches(String typeName, Class<?> type) {
+ final int lastDot = typeName.lastIndexOf('.');
+ final String fullTypeName = type.getCanonicalName();
+ return lastDot != -1 && fullTypeName.endsWith(typeName.substring(lastDot)) || typeName.equals(fullTypeName);
+ }
+
+ static String getClassAndMethodName(Class<?> clazz, String name) {
+ final String clazzName = clazz.getCanonicalName();
+ return (clazzName == null ? clazz.getName() : clazzName) + "." + name;
+ }
+
+ @Override
+ public String toString() {
+ return "[" + getClass().getName() + " " + getName() + "]";
+ }
+}
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