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annotate graal/Runtime/src/com/sun/hotspot/c1x/logging/LoggingProxy.java @ 2297:099e697d8934

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Renaming c1x4hotspotsrc => graal and HotSpotVM => Runtime
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Fri, 22 Apr 2011 15:08:53 +0200
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1 /*
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2 * Copyright (c) 2010 Sun Microsystems, Inc. All rights reserved.
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3 *
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4 * Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product
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5 * that is described in this document. In particular, and without limitation, these intellectual property
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6 * rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or
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7 * more additional patents or pending patent applications in the U.S. and in other countries.
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8 *
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9 * U.S. Government Rights - Commercial software. Government users are subject to the Sun
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10 * Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its
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11 * supplements.
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12 *
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13 * Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or
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14 * registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks
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15 * are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the
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16 * U.S. and other countries.
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17 *
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18 * UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open
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19 * Company, Ltd.
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20 */
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21 package com.sun.hotspot.c1x.logging;
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22
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23 import java.lang.reflect.*;
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24
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25 import com.sun.hotspot.c1x.server.*;
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26
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27 /**
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28 * A java.lang.reflect proxy that hierarchically logs all method invocations along with their parameters and return values.
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29 *
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30 * @author Lukas Stadler
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31 */
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32 public class LoggingProxy<T> implements InvocationHandler {
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33
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34 private T delegate;
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35
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36 public LoggingProxy(T delegate) {
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37 this.delegate = delegate;
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38 }
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39
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40 @Override
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41 public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
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42 int argCount = args == null ? 0 : args.length;
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43 if (method.getParameterTypes().length != argCount) {
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44 throw new RuntimeException("wrong parameter count");
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45 }
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46 StringBuilder str = new StringBuilder();
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47 str.append(method.getReturnType().getSimpleName() + " " + method.getDeclaringClass().getSimpleName() + "." + method.getName() + "(");
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48 for (int i = 0; i < argCount; i++) {
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49 str.append(i == 0 ? "" : ", ");
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50 str.append(Logger.pretty(args[i]));
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51 }
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52 str.append(")");
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53 Logger.startScope(str.toString());
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54 final Object result;
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55 try {
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56 if (args == null) {
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57 result = method.invoke(delegate);
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58 } else {
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59 result = method.invoke(delegate, args);
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60 }
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61 } catch (InvocationTargetException e) {
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62 Logger.endScope(" = Exception " + e.getMessage());
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63 throw e.getCause();
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64 }
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65 Logger.endScope(" = " + Logger.pretty(result));
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66 return result;
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67 }
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68
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69 /**
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70 * The object returned by this method will implement all interfaces that are implemented by delegate.
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71 */
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72 public static <T> T getProxy(Class<T> interf, T delegate) {
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73 Class<?>[] interfaces = ReplacingStreams.getAllInterfaces(delegate.getClass());
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74 Object obj = Proxy.newProxyInstance(interf.getClassLoader(), interfaces, new LoggingProxy<T>(delegate));
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75 return interf.cast(obj);
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76 }
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77 }