Showing the changes to java/pkg/sun/swing/SwingLazyValue.java (1 of 18352 files). Show all
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| 1 | /* | ||
| 2 | * Copyright (c) 2003, 2008, 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 | package sun.swing; | ||
| 26 | |||
| 27 | import java.lang.reflect.Constructor; | ||
| 28 | import java.lang.reflect.Method; | ||
| 29 | import java.lang.reflect.AccessibleObject; | ||
| 30 | import java.security.AccessController; | ||
| 31 | import java.security.PrivilegedAction; | ||
| 32 | import javax.swing.UIDefaults; | ||
| 33 | |||
| 34 | /** | ||
| 35 | * SwingLazyValue is a copy of ProxyLazyValue that does not snapshot the | ||
| 36 | * AccessControlContext or use a doPrivileged to resolve the class name. | ||
| 37 | * It's intented for use in places in Swing where we need ProxyLazyValue, this | ||
| 38 | * should never be used in a place where the developer could supply the | ||
| 39 | * arguments. | ||
| 40 | * | ||
| 41 | */ | ||
| 42 | public class SwingLazyValue implements UIDefaults.LazyValue { | ||
| 43 | private String className; | ||
| 44 | private String methodName; | ||
| 45 | private Object[] args; | ||
| 46 | |||
| 47 | public SwingLazyValue(String c) { | ||
| 48 | this(c, (String)null); | ||
| 49 | } | ||
| 50 | public SwingLazyValue(String c, String m) { | ||
| 51 | this(c, m, null); | ||
| 52 | } | ||
| 53 | public SwingLazyValue(String c, Object[] o) { | ||
| 54 | this(c, null, o); | ||
| 55 | } | ||
| 56 | public SwingLazyValue(String c, String m, Object[] o) { | ||
| 57 | className = c; | ||
| 58 | methodName = m; | ||
| 59 | if (o != null) { | ||
| 60 | args = o.clone(); | ||
| 61 | } | ||
| 62 | } | ||
| 63 | |||
| 64 | public Object createValue(final UIDefaults table) { | ||
| 65 | try { | ||
| 66 | Object cl; | ||
| 67 | Class<?> c = Class.forName(className, true, null); | ||
| 68 | if (methodName != null) { | ||
| 69 | Class[] types = getClassArray(args); | ||
| 70 | Method m = c.getMethod(methodName, types); | ||
| 71 | makeAccessible(m); | ||
| 72 | return m.invoke(c, args); | ||
| 73 | } else { | ||
| 74 | Class[] types = getClassArray(args); | ||
| 75 | Constructor constructor = c.getConstructor(types); | ||
| 76 | makeAccessible(constructor); | ||
| 77 | return constructor.newInstance(args); | ||
| 78 | } | ||
| 79 | } catch (Exception e) { | ||
| 80 | // Ideally we would throw an exception, unfortunately | ||
| 81 | // often times there are errors as an initial look and | ||
| 82 | // feel is loaded before one can be switched. Perhaps a | ||
| 83 | // flag should be added for debugging, so that if true | ||
| 84 | // the exception would be thrown. | ||
| 85 | } | ||
| 86 | return null; | ||
| 87 | } | ||
| 88 | |||
| 89 | private void makeAccessible(final AccessibleObject object) { | ||
| 90 | AccessController.doPrivileged(new PrivilegedAction<Void>() { | ||
| 91 | public Void run() { | ||
| 92 | object.setAccessible(true); | ||
| 93 | return null; | ||
| 94 | } | ||
| 95 | }); | ||
| 96 | } | ||
| 97 | |||
| 98 | private Class[] getClassArray(Object[] args) { | ||
| 99 | Class[] types = null; | ||
| 100 | if (args!=null) { | ||
| 101 | types = new Class[args.length]; | ||
| 102 | for (int i = 0; i< args.length; i++) { | ||
| 103 | /* PENDING(ges): At present only the primitive types | ||
| 104 | used are handled correctly; this should eventually | ||
| 105 | handle all primitive types */ | ||
| 106 | if (args[i] instanceof java.lang.Integer) { | ||
| 107 | types[i]=Integer.TYPE; | ||
| 108 | } else if (args[i] instanceof java.lang.Boolean) { | ||
| 109 | types[i]=Boolean.TYPE; | ||
| 110 | } else if (args[i] instanceof javax.swing.plaf.ColorUIResource) { | ||
| 111 | /* PENDING(ges) Currently the Reflection APIs do not | ||
| 112 | search superclasses of parameters supplied for | ||
| 113 | constructor/method lookup. Since we only have | ||
| 114 | one case where this is needed, we substitute | ||
| 115 | directly instead of adding a massive amount | ||
| 116 | of mechanism for this. Eventually this will | ||
| 117 | probably need to handle the general case as well. | ||
| 118 | */ | ||
| 119 | types[i]=java.awt.Color.class; | ||
| 120 | } else { | ||
| 121 | types[i]=args[i].getClass(); | ||
| 122 | } | ||
| 123 | } | ||
| 124 | } | ||
| 125 | return types; | ||
| 126 | } | ||
| 127 | } | ||