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Diffstat (limited to 'src/jdk/internal/dynalink/support/DefaultInternalObjectFilter.java')
| -rw-r--r-- | src/jdk/internal/dynalink/support/DefaultInternalObjectFilter.java | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/src/jdk/internal/dynalink/support/DefaultInternalObjectFilter.java b/src/jdk/internal/dynalink/support/DefaultInternalObjectFilter.java deleted file mode 100644 index 94378f11..00000000 --- a/src/jdk/internal/dynalink/support/DefaultInternalObjectFilter.java +++ /dev/null @@ -1,177 +0,0 @@ -/* - * 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. - */ - -/* - * 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 2009-2015 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.support; - -import java.lang.invoke.MethodHandle; -import java.lang.invoke.MethodHandles; -import java.lang.invoke.MethodType; -import jdk.internal.dynalink.DynamicLinkerFactory; -import jdk.internal.dynalink.linker.MethodHandleTransformer; - -/** - * Default implementation for a {@link DynamicLinkerFactory#setInternalObjectsFilter(MethodHandleTransformer)}. - * Given a method handle of {@code Object(Object)} type for filtering parameter and another one of the same type for - * filtering return values, applies them to passed method handles where their parameter types and/or return value types - * are declared to be {@link Object}. - */ -public class DefaultInternalObjectFilter implements MethodHandleTransformer { - private static final MethodHandle FILTER_VARARGS = new Lookup(MethodHandles.lookup()).findStatic( - DefaultInternalObjectFilter.class, "filterVarArgs", MethodType.methodType(Object[].class, MethodHandle.class, Object[].class)); - - private final MethodHandle parameterFilter; - private final MethodHandle returnFilter; - private final MethodHandle varArgFilter; - - /** - * Creates a new filter. - * @param parameterFilter the filter for method parameters. Must be of type {@code Object(Object)}, or null. - * @param returnFilter the filter for return values. Must be of type {@code Object(Object)}, or null. - * @throws IllegalArgumentException if one or both filters are not of the expected type. - */ - public DefaultInternalObjectFilter(final MethodHandle parameterFilter, final MethodHandle returnFilter) { - this.parameterFilter = checkHandle(parameterFilter, "parameterFilter"); - this.returnFilter = checkHandle(returnFilter, "returnFilter"); - this.varArgFilter = parameterFilter == null ? null : FILTER_VARARGS.bindTo(parameterFilter); - } - - @Override - public MethodHandle transform(final MethodHandle target) { - assert target != null; - MethodHandle[] filters = null; - final MethodType type = target.type(); - final boolean isVarArg = target.isVarargsCollector(); - final int paramCount = type.parameterCount(); - final MethodHandle paramsFiltered; - // Filter parameters - if (parameterFilter != null) { - int firstFilter = -1; - // Ignore receiver, start from argument 1 - for(int i = 1; i < paramCount; ++i) { - final Class<?> paramType = type.parameterType(i); - final boolean filterVarArg = isVarArg && i == paramCount - 1 && paramType == Object[].class; - if (filterVarArg || paramType == Object.class) { - if (filters == null) { - firstFilter = i; - filters = new MethodHandle[paramCount - firstFilter]; - } - filters[i - firstFilter] = filterVarArg ? varArgFilter : parameterFilter; - } - } - paramsFiltered = filters != null ? MethodHandles.filterArguments(target, firstFilter, filters) : target; - } else { - paramsFiltered = target; - } - // Filter return value if needed - final MethodHandle returnFiltered = returnFilter != null && type.returnType() == Object.class ? MethodHandles.filterReturnValue(paramsFiltered, returnFilter) : paramsFiltered; - // Preserve varargs collector state - return isVarArg && !returnFiltered.isVarargsCollector() ? returnFiltered.asVarargsCollector(type.parameterType(paramCount - 1)) : returnFiltered; - - } - - private static MethodHandle checkHandle(final MethodHandle handle, final String handleKind) { - if (handle != null) { - final MethodType objectObjectType = MethodType.methodType(Object.class, Object.class); - if (!handle.type().equals(objectObjectType)) { - throw new IllegalArgumentException("Method type for " + handleKind + " must be " + objectObjectType); - } - } - return handle; - } - - @SuppressWarnings("unused") - private static Object[] filterVarArgs(final MethodHandle parameterFilter, final Object[] args) throws Throwable { - Object[] newArgs = null; - for(int i = 0; i < args.length; ++i) { - final Object arg = args[i]; - final Object newArg = parameterFilter.invokeExact(arg); - if (arg != newArg) { - if (newArgs == null) { - newArgs = args.clone(); - } - newArgs[i] = newArg; - } - } - return newArgs == null ? args : newArgs; - } -} |