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view graal/Runtime/src/com/oracle/graal/runtime/logging/LoggingProxy.java @ 2502:3e3e8bd12730
Copyright rebranding. Update checkstyle file.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Tue, 26 Apr 2011 21:48:09 +0200 |
parents | 6594e6d8bfe7 |
children | 6bc5ec0255df |
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/* * Copyright (c) 2011, 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 com.oracle.graal.runtime.logging; import java.lang.reflect.*; import com.oracle.graal.runtime.server.*; /** * A java.lang.reflect proxy that hierarchically logs all method invocations along with their parameters and return values. * * @author Lukas Stadler */ public class LoggingProxy<T> implements InvocationHandler { private T delegate; public LoggingProxy(T delegate) { this.delegate = delegate; } @Override public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { int argCount = args == null ? 0 : args.length; if (method.getParameterTypes().length != argCount) { throw new RuntimeException("wrong parameter count"); } StringBuilder str = new StringBuilder(); str.append(method.getReturnType().getSimpleName() + " " + method.getDeclaringClass().getSimpleName() + "." + method.getName() + "("); for (int i = 0; i < argCount; i++) { str.append(i == 0 ? "" : ", "); str.append(Logger.pretty(args[i])); } str.append(")"); Logger.startScope(str.toString()); final Object result; try { if (args == null) { result = method.invoke(delegate); } else { result = method.invoke(delegate, args); } } catch (InvocationTargetException e) { Logger.endScope(" = Exception " + e.getMessage()); throw e.getCause(); } Logger.endScope(" = " + Logger.pretty(result)); return result; } /** * The object returned by this method will implement all interfaces that are implemented by delegate. */ public static <T> T getProxy(Class<T> interf, T delegate) { Class<?>[] interfaces = ReplacingStreams.getAllInterfaces(delegate.getClass()); Object obj = Proxy.newProxyInstance(interf.getClassLoader(), interfaces, new LoggingProxy<T>(delegate)); return interf.cast(obj); } }