1 /* 2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package com.sun.javafx.util; 27 28 import java.lang.reflect.InvocationTargetException; 29 import java.lang.reflect.Method; 30 import java.security.AccessController; 31 import java.security.PrivilegedAction; 32 33 public class ModuleHelper { 34 private static final Method getModuleMethod; 35 private static final Method addReadsMethod; 36 private static final Method addExportsMethod; 37 38 private static final boolean verbose; 39 40 static { 41 verbose = AccessController.doPrivileged((PrivilegedAction<Boolean>) () -> 42 Boolean.getBoolean("javafx.verbose")); 43 44 if (verbose) { 45 System.err.println("" + ModuleHelper.class.getName() + " : <clinit>"); 46 } 47 Method mGetModule = null; 48 Method mAddReads = null; 49 Method mAddExports = null; 50 try { 51 mGetModule = Class.class.getMethod("getModule"); 52 Class<?> moduleClass = mGetModule.getReturnType(); 53 mAddReads = moduleClass.getMethod("addReads", moduleClass); 54 mAddExports = moduleClass.getMethod("addExports", String.class, moduleClass); 55 } catch (NoSuchMethodException e) { 56 // ignore 57 } 58 getModuleMethod = mGetModule; 59 addReadsMethod = mAddReads; 60 addExportsMethod = mAddExports; 61 if (verbose) { 62 System.err.println("getModuleMethod = " + getModuleMethod); 63 System.err.println("addReadsMethod = " + addReadsMethod); 64 System.err.println("addExportsMethod = " + addExportsMethod); 65 } 66 } 67 68 public static Object getModule(Class clazz) { 69 if (getModuleMethod != null) { 70 try { 71 return getModuleMethod.invoke(clazz); 72 } catch (IllegalAccessException | InvocationTargetException ex) { 73 throw new RuntimeException(ex); 74 } 75 } 76 return null; 77 } 78 79 public static void addReads(Object thisModule, Object targetModule) { 80 if (addReadsMethod != null) { 81 try { 82 addReadsMethod.invoke(thisModule, targetModule); 83 } catch (IllegalAccessException | InvocationTargetException ex) { 84 throw new RuntimeException(ex); 85 } 86 } 87 } 88 89 public static void addExports(Object thisModule, String packageName, Object targetModule) { 90 if (addExportsMethod != null) { 91 try { 92 addExportsMethod.invoke(thisModule, packageName, targetModule); 93 } catch (IllegalAccessException | InvocationTargetException ex) { 94 throw new RuntimeException(ex); 95 } 96 } 97 } 98 99 }