129 lines
5.0 KiB
Java
129 lines
5.0 KiB
Java
/*
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* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.swing;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.Method;
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import java.lang.reflect.AccessibleObject;
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import java.security.AccessController;
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import java.security.PrivilegedAction;
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import javax.swing.UIDefaults;
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import sun.reflect.misc.ReflectUtil;
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/**
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* SwingLazyValue is a copy of ProxyLazyValue that does not snapshot the
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* AccessControlContext or use a doPrivileged to resolve the class name.
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* It's intented for use in places in Swing where we need ProxyLazyValue, this
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* should never be used in a place where the developer could supply the
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* arguments.
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*
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*/
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public class SwingLazyValue implements UIDefaults.LazyValue {
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private String className;
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private String methodName;
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private Object[] args;
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public SwingLazyValue(String c) {
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this(c, (String)null);
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}
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public SwingLazyValue(String c, String m) {
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this(c, m, null);
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}
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public SwingLazyValue(String c, Object[] o) {
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this(c, null, o);
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}
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public SwingLazyValue(String c, String m, Object[] o) {
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className = c;
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methodName = m;
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if (o != null) {
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args = o.clone();
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}
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}
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public Object createValue(final UIDefaults table) {
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try {
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ReflectUtil.checkPackageAccess(className);
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Class<?> c = Class.forName(className, true, null);
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if (methodName != null) {
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Class[] types = getClassArray(args);
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Method m = c.getMethod(methodName, types);
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makeAccessible(m);
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return m.invoke(c, args);
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} else {
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Class[] types = getClassArray(args);
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Constructor constructor = c.getConstructor(types);
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makeAccessible(constructor);
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return constructor.newInstance(args);
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}
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} catch (Exception e) {
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// Ideally we would throw an exception, unfortunately
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// often times there are errors as an initial look and
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// feel is loaded before one can be switched. Perhaps a
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// flag should be added for debugging, so that if true
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// the exception would be thrown.
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}
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return null;
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}
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private void makeAccessible(final AccessibleObject object) {
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AccessController.doPrivileged(new PrivilegedAction<Void>() {
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public Void run() {
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object.setAccessible(true);
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return null;
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}
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});
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}
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private Class[] getClassArray(Object[] args) {
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Class[] types = null;
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if (args!=null) {
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types = new Class[args.length];
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for (int i = 0; i< args.length; i++) {
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/* PENDING(ges): At present only the primitive types
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used are handled correctly; this should eventually
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handle all primitive types */
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if (args[i] instanceof java.lang.Integer) {
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types[i]=Integer.TYPE;
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} else if (args[i] instanceof java.lang.Boolean) {
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types[i]=Boolean.TYPE;
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} else if (args[i] instanceof javax.swing.plaf.ColorUIResource) {
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/* PENDING(ges) Currently the Reflection APIs do not
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search superclasses of parameters supplied for
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constructor/method lookup. Since we only have
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one case where this is needed, we substitute
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directly instead of adding a massive amount
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of mechanism for this. Eventually this will
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probably need to handle the general case as well.
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*/
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types[i]=java.awt.Color.class;
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} else {
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types[i]=args[i].getClass();
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}
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}
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}
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return types;
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}
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}
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