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 | +} | |