1 files changed, 84 insertions, 0 deletions
diff --git a/src/main/java/de/spline/kvm/utils/ReflectionUtils.java b/src/main/java/de/spline/kvm/utils/ReflectionUtils.java
new file mode 100644
index 0000000..03f3a9f
--- /dev/null
+++ b/src/main/java/de/spline/kvm/utils/ReflectionUtils.java
@@ -0,0 +1,84 @@
+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");
+    }
+}