Mercurial > hg > graal-jvmci-8
diff graal/Runtime/src/com/sun/hotspot/c1x/logging/LoggingProxy.java @ 2297:099e697d8934
Renaming c1x4hotspotsrc => graal and HotSpotVM => Runtime
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Fri, 22 Apr 2011 15:08:53 +0200 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/Runtime/src/com/sun/hotspot/c1x/logging/LoggingProxy.java Fri Apr 22 15:08:53 2011 +0200 @@ -0,0 +1,77 @@ +/* + * Copyright (c) 2010 Sun Microsystems, Inc. All rights reserved. + * + * Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product + * that is described in this document. In particular, and without limitation, these intellectual property + * rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or + * more additional patents or pending patent applications in the U.S. and in other countries. + * + * U.S. Government Rights - Commercial software. Government users are subject to the Sun + * Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its + * supplements. + * + * Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or + * registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks + * are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the + * U.S. and other countries. + * + * UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open + * Company, Ltd. + */ +package com.sun.hotspot.c1x.logging; + +import java.lang.reflect.*; + +import com.sun.hotspot.c1x.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); + } +}