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package de.spline.kvm.utils;
import java.awt.PopupMenu;
import java.lang.reflect.Field;
import nn.pp.rc.RemoteConsoleApplet;
import nn.pp.rc.ServerConsolePanelBase;
public class ReflectionUtils
{
/**
* Set a field of an object with reflection. This ignores all access
* permissions (f.e. private) and accesses the field by name (so it works
* for strange field names).
*
* @param cls
* @param instance
* @param field
* @param value
*/
public static void setField(Class<?> cls, Object instance, String field, Object value)
{
try {
Field f = cls.getDeclaredField(field);
f.setAccessible(true);
f.set(instance, value);
} catch (NoSuchFieldException | IllegalAccessException e) {
e.printStackTrace();
}
}
/**
* Get a field of an object with reflection. This ignores all access
* permissions (f.e. private) and accesses the field by name (so it works
* for strange field names).
*
* @param cls
* @param instance
* @param field
* @return
*/
public static Object getField(Class<?> cls, Object instance, String field)
{
try {
Field f = cls.getDeclaredField(field);
f.setAccessible(true);
return f.get(instance);
} catch (NoSuchFieldException | IllegalAccessException e) {
e.printStackTrace();
}
return null;
}
/**
* Get the ServerConsolePanelBase field from the applet instance. We need
* to use reflection here, because the obfuscation has produced strange
* field names and we cannot access it using normal methods.
*
* @param applet RemoteConsoleApplet instance
* @return ServerConsolePanelBase instance of this applet
*/
public static ServerConsolePanelBase getConsolePanel(RemoteConsoleApplet applet)
{
return (ServerConsolePanelBase) ReflectionUtils.getField(RemoteConsoleApplet.class, applet, "else");
}
/**
* Get the popup option menu from a ServerConsolePanelBase instance. The
* field name is okay-ish here, but we also need to use reflection here
* because this field in private.
*
* (We use this option menu to fix a silly bug: The menu is not displayed,
* because the "label" is removed after initialization and this is causing
* NullPointerExceptions.)
*
* @param consolePanel ServerConsolePanelBase instance
* @return options menu
*/
public static PopupMenu getOptionMenu(ServerConsolePanelBase consolePanel)
{
return (PopupMenu)ReflectionUtils.getField(ServerConsolePanelBase.class, consolePanel, "G");
}
}
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