/*
* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.swing;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.lang.reflect.AccessibleObject;
import java.security.AccessController;
import java.security.PrivilegedAction;
import javax.swing.UIDefaults;
/**
* SwingLazyValue is a copy of ProxyLazyValue that does not snapshot the
* AccessControlContext or use a doPrivileged to resolve the class name.
* It's intented for use in places in Swing where we need ProxyLazyValue, this
* should never be used in a place where the developer could supply the
* arguments.
*
*/
public class SwingLazyValue implements UIDefaults.LazyValue {
private String className;
private String methodName;
private Object[] args;
public SwingLazyValue(String c) {
this(c, (String)null);
}
public SwingLazyValue(String c, String m) {
this(c, m, null);
}
public SwingLazyValue(String c, Object[] o) {
this(c, null, o);
}
public SwingLazyValue(String c, String m, Object[] o) {
className = c;
methodName = m;
if (o != null) {
args = (Object[])o.clone();
}
}
public Object createValue(final UIDefaults table) {
try {
Class c;
Object cl;
c = Class.forName(className, true, null);
if (methodName != null) {
Class[] types = getClassArray(args);
Method m = c.getMethod(methodName, types);
makeAccessible(m);
return m.invoke(c, args);
} else {
Class[] types = getClassArray(args);
Constructor constructor = c.getConstructor(types);
makeAccessible(constructor);
return constructor.newInstance(args);
}
} catch (Exception e) {
// Ideally we would throw an exception, unfortunately
// often times there are errors as an initial look and
// feel is loaded before one can be switched. Perhaps a
// flag should be added for debugging, so that if true
// the exception would be thrown.
}
return null;
}
private void makeAccessible(final AccessibleObject object) {
AccessController.doPrivileged(new PrivilegedAction<Void>() {
public Void run() {
object.setAccessible(true);
return null;
}
});
}
private Class[] getClassArray(Object[] args) {
Class[] types = null;
if (args!=null) {
types = new Class[args.length];
for (int i = 0; i< args.length; i++) {
/* PENDING(ges): At present only the primitive types
used are handled correctly; this should eventually
handle all primitive types */
if (args[i] instanceof java.lang.Integer) {
types[i]=Integer.TYPE;
} else if (args[i] instanceof java.lang.Boolean) {
types[i]=Boolean.TYPE;
} else if (args[i] instanceof javax.swing.plaf.ColorUIResource) {
/* PENDING(ges) Currently the Reflection APIs do not
search superclasses of parameters supplied for
constructor/method lookup. Since we only have
one case where this is needed, we substitute
directly instead of adding a massive amount
of mechanism for this. Eventually this will
probably need to handle the general case as well.
*/
types[i]=java.awt.Color.class;
} else {
types[i]=args[i].getClass();
}
}
}
return types;
}
}