1 /* 2 * Copyright (c) 2015, 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 } 14 the GNU General Public License 15 * version 2 for more details (a copy is included in the LICENSE file that 16 * accompanied this code). 17 * 18 * You should have received a copy of the GNU General Public License version 19 * 2 along with this work; if not, write to the Free Software Foundation, 20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 21 * 22 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 23 * or visit www.oracle.com if you need additional information or have any 24 * questions. 25 */ 26 27 package com.sun.javafx.util; 28 29 import java.lang.reflect.InvocationTargetException; 30 import java.lang.reflect.Method; 31 import java.security.AccessController; 32 import java.security.PrivilegedAction; 33 34 public class ModuleHelper { 35 private static final Method getModuleMethod; 36 private static final Method addReadsMethod; 37 private static final Method addExportsMethod; 38 39 private static final boolean verbose; 40 41 static { 42 verbose = AccessController.doPrivileged((PrivilegedAction<Boolean>) () -> 43 Boolean.getBoolean("javafx.verbose")); 44 45 if (verbose) { 46 System.err.println("" + ModuleHelper.class.getName() + " : <clinit>"); 47 } 48 Method mGetModule = null; 49 Method mAddReads = null; 50 Method mAddExports = null; 51 try { 52 mGetModule = Class.class.getMethod("getModule"); 53 Class<?> moduleClass = mGetModule.getReturnType(); 54 mAddReads = moduleClass.getMethod("addReads", moduleClass); 55 mAddExports = moduleClass.getMethod("addExports", String.class, moduleClass); 56 } catch (NoSuchMethodException e) { 57 // ignore 58 } 59 getModuleMethod = mGetModule; 60 addReadsMethod = mAddReads; 61 addExportsMethod = mAddExports; 62 if (verbose) { 63 System.err.println("getModuleMethod = " + getModuleMethod); 64 System.err.println("addReadsMethod = " + addReadsMethod); 65 System.err.println("addExportsMethod = " + addExportsMethod); 66 } 67 } 68 69 public static Object getModule(Class clazz) { 70 if (getModuleMethod != null) { 71 try { 72 return getModuleMethod.invoke(clazz); 73 } catch (IllegalAccessException | InvocationTargetException ex) { 74 throw new RuntimeException(ex); 75 } 76 } 77 return null; 78 } 79 80 public static void addReads(Object thisModule, Object targetModule) { 81 if (addReadsMethod != null) { 82 try { 83 addReadsMethod.invoke(thisModule, targetModule); 84 } catch (IllegalAccessException | InvocationTargetException ex) { 85 throw new RuntimeException(ex); 86 } 87 } 88 } 89 90 public static void addExports(Object thisModule, String packageName, Object targetModule) { 91 if (addExportsMethod != null) { 92 try { 93 addExportsMethod.invoke(thisModule, packageName, targetModule); 94 } catch (IllegalAccessException | InvocationTargetException ex) { 95 throw new RuntimeException(ex); 96 } 97 } 98 } 99 100 }