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1 /* |
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2 * Copyright (c) 1997, 2012, 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. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package com.sun.tools.internal.xjc; |
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27 |
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28 import java.net.MalformedURLException; |
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29 import java.net.URL; |
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30 import java.net.URLClassLoader; |
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31 import java.util.ArrayList; |
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32 import java.util.Arrays; |
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33 import java.util.List; |
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34 |
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35 import javax.xml.bind.JAXBContext; |
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36 |
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37 import com.sun.istack.internal.tools.MaskingClassLoader; |
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38 import com.sun.istack.internal.tools.ParallelWorldClassLoader; |
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39 |
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40 /** |
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41 * Creates a class loader configured to run XJC 1.0/2.0 safely without |
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42 * interference with JAXB 2.0 API in Mustang. |
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43 * |
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44 * @author Kohsuke Kawaguchi |
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45 */ |
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46 class ClassLoaderBuilder { |
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47 |
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48 /** |
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49 * Creates a new class loader that eventually delegates to the given {@link ClassLoader} |
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50 * such that XJC can be loaded by using this classloader. |
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51 * |
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52 * @param v |
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53 * Either "1.0" or "2.0", indicating the version of the -source value. |
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54 */ |
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55 protected static ClassLoader createProtectiveClassLoader(ClassLoader cl, String v) throws ClassNotFoundException, MalformedURLException { |
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56 if(noHack) return cl; // provide an escape hatch |
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57 |
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58 boolean mustang = false; |
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59 |
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60 if (SecureLoader.getClassClassLoader(JAXBContext.class) == null) { |
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61 // JAXB API is loaded from the bootstrap. We need to override one with ours |
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62 mustang = true; |
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63 |
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64 List<String> mask = new ArrayList<String>(Arrays.asList(maskedPackages)); |
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65 mask.add("javax.xml.bind."); |
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66 |
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67 cl = new MaskingClassLoader(cl,mask); |
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68 |
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69 URL apiUrl = cl.getResource("javax/xml/bind/JAXBPermission.class"); |
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70 if(apiUrl==null) |
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71 throw new ClassNotFoundException("There's no JAXB 2.2 API in the classpath"); |
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72 |
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73 cl = new URLClassLoader(new URL[]{ParallelWorldClassLoader.toJarUrl(apiUrl)},cl); |
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74 } |
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75 |
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76 //Leave XJC2 in the publicly visible place |
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77 // and then isolate XJC1 in a child class loader, |
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78 // then use a MaskingClassLoader |
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79 // so that the XJC2 classes in the parent class loader |
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80 // won't interfere with loading XJC1 classes in a child class loader |
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81 |
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82 if ("1.0".equals(v)) { |
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83 if(!mustang) |
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84 // if we haven't used Masking ClassLoader, do so now. |
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85 cl = new MaskingClassLoader(cl,toolPackages); |
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86 cl = new ParallelWorldClassLoader(cl,"1.0/"); |
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87 } else { |
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88 if(mustang) |
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89 // the whole RI needs to be loaded in a separate class loader |
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90 cl = new ParallelWorldClassLoader(cl,""); |
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91 } |
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92 |
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93 return cl; |
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94 } |
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95 |
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96 |
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97 /** |
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98 * The list of package prefixes we want the |
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99 * {@link MaskingClassLoader} to prevent the parent |
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100 * classLoader from loading |
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101 */ |
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102 private static String[] maskedPackages = new String[]{ |
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103 // toolPackages + alpha |
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104 "com.sun.tools.", |
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105 "com.sun.codemodel.internal.", |
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106 "com.sun.relaxng.", |
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107 "com.sun.xml.internal.xsom.", |
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108 "com.sun.xml.internal.bind.", |
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109 }; |
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110 |
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111 private static String[] toolPackages = new String[]{ |
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112 "com.sun.tools.", |
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113 "com.sun.codemodel.internal.", |
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114 "com.sun.relaxng.", |
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115 "com.sun.xml.internal.xsom." |
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116 }; |
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117 |
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118 /** |
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119 * Escape hatch in case this class loader hack breaks. |
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120 */ |
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121 public static final boolean noHack = Boolean.getBoolean(XJCFacade.class.getName()+".nohack"); |
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122 } |