Mercurial > hg > graal-compiler
annotate graal/com.oracle.jvmci.hotspot/src/com/oracle/jvmci/hotspot/logging/LoggingProxy.java @ 21730:b9f9b8af17ff
Simplify interface to reference map
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Wed, 03 Jun 2015 19:57:38 -0700 |
parents | 9579a3c62a9e |
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1 /* |
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2 * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 package com.oracle.jvmci.hotspot.logging; |
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24 |
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25 import java.lang.reflect.*; |
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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 |
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29 * parameters and return values. |
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30 */ |
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31 public class LoggingProxy<T> implements InvocationHandler { |
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32 |
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33 private T delegate; |
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34 |
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35 public LoggingProxy(T delegate) { |
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36 this.delegate = delegate; |
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37 } |
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38 |
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39 @Override |
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40 public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { |
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41 int argCount = args == null ? 0 : args.length; |
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42 if (method.getParameterTypes().length != argCount) { |
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43 throw new RuntimeException("wrong parameter count"); |
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44 } |
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45 StringBuilder str = new StringBuilder(); |
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46 str.append(method.getReturnType().getSimpleName() + " " + method.getDeclaringClass().getSimpleName() + "." + method.getName() + "("); |
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47 for (int i = 0; i < argCount; i++) { |
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48 str.append(i == 0 ? "" : ", "); |
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49 str.append(Logger.pretty(args[i])); |
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50 } |
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51 str.append(")"); |
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52 Logger.startScope(str.toString()); |
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53 final Object result; |
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54 try { |
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55 if (args == null) { |
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56 result = method.invoke(delegate); |
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57 } else { |
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58 result = method.invoke(delegate, args); |
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59 } |
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60 } catch (InvocationTargetException e) { |
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61 Logger.endScope(" = Exception " + e.getMessage()); |
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62 throw e.getCause(); |
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63 } |
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64 Logger.endScope(" = " + Logger.pretty(result)); |
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65 return result; |
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66 } |
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67 |
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68 /** |
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69 * The object returned by this method will implement all interfaces that are implemented by |
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70 * 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 = ProxyUtil.getAllInterfaces(delegate.getClass()); |
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74 Object obj = Proxy.newProxyInstance(interf.getClassLoader(), interfaces, new LoggingProxy<>(delegate)); |
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75 return interf.cast(obj); |
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76 } |
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77 } |