| /* |
| * Copyright (c) 2012, 2014, 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. |
| * |
| * 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.vm.ci.meta; |
| |
| import java.lang.reflect.Constructor; |
| import java.lang.reflect.Executable; |
| import java.lang.reflect.Field; |
| import java.lang.reflect.Method; |
| |
| /** |
| * Provides access to the metadata of a class typically provided in a class file. |
| */ |
| public interface MetaAccessProvider { |
| |
| /** |
| * Returns the resolved Java type representing a given Java class. |
| * |
| * @param clazz the Java class object |
| * @return the resolved Java type object |
| */ |
| ResolvedJavaType lookupJavaType(Class<?> clazz); |
| |
| /** |
| * Returns the resolved Java types representing some given Java classes. |
| * |
| * @param classes the Java class objects |
| * @return the resolved Java type objects |
| */ |
| default ResolvedJavaType[] lookupJavaTypes(Class<?>[] classes) { |
| ResolvedJavaType[] result = new ResolvedJavaType[classes.length]; |
| for (int i = 0; i < result.length; i++) { |
| result[i] = lookupJavaType(classes[i]); |
| } |
| return result; |
| } |
| |
| /** |
| * Provides the {@link ResolvedJavaMethod} for a {@link Method} or {@link Constructor} obtained |
| * via reflection. |
| */ |
| ResolvedJavaMethod lookupJavaMethod(Executable reflectionMethod); |
| |
| /** |
| * Provides the {@link ResolvedJavaField} for a {@link Field} obtained via reflection. |
| */ |
| ResolvedJavaField lookupJavaField(Field reflectionField); |
| |
| /** |
| * Returns the resolved Java type of the given {@link JavaConstant} object. |
| * |
| * @return {@code null} if {@code constant.isNull() || !constant.kind.isObject()} |
| */ |
| ResolvedJavaType lookupJavaType(JavaConstant constant); |
| |
| /** |
| * Returns the number of bytes occupied by this constant value or constant object. |
| * |
| * @param constant the constant whose bytes should be measured |
| * @return the number of bytes occupied by this constant |
| */ |
| long getMemorySize(JavaConstant constant); |
| |
| /** |
| * Parses a |
| * <a href="http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.3.3">method |
| * descriptor</a> into a {@link Signature}. The behavior of this method is undefined if the |
| * method descriptor is not well formed. |
| */ |
| Signature parseMethodDescriptor(String methodDescriptor); |
| |
| /** |
| * Encodes a deoptimization action and a deoptimization reason in an integer value. |
| * |
| * @param debugId an integer that can be used to track the origin of a deoptimization at |
| * runtime. There is no guarantee that the runtime will use this value. The runtime |
| * may even keep fewer than 32 bits. |
| * |
| * @return the encoded value as an integer |
| */ |
| JavaConstant encodeDeoptActionAndReason(DeoptimizationAction action, DeoptimizationReason reason, int debugId); |
| |
| DeoptimizationReason decodeDeoptReason(JavaConstant constant); |
| |
| DeoptimizationAction decodeDeoptAction(JavaConstant constant); |
| |
| int decodeDebugId(JavaConstant constant); |
| } |