Update DTDEncoder.

Author: gk-brown

sierra-tools/dtd-encoder/src/main/java/org/httprpc/sierra/tools/DTDEncoder.java

@@ -23,6 +23,7 @@
 import org.httprpc.sierra.VerticalAlignment;
 
 import javax.swing.Icon;
+import javax.swing.JComponent;
 import javax.swing.JMenu;
 import javax.swing.JMenuBar;
 import javax.swing.JPanel;
@@ -250,7 +251,21 @@ private void declareAttributeList(String tag, Class<?> type, Writer writer) thro
         writer.append(";>\n");
     }
 
-    public static void main(String[] args) throws IOException {
+    @SuppressWarnings("unchecked")
+    public static void main(String[] args) throws Exception {
+        for (var i = 0; i < args.length; i++) {
+            var components = args[i].split("=");
+
+            if (components.length != 2) {
+                throw new IllegalArgumentException("Invalid binding.");
+            }
+
+            var tag = components[0];
+            var type = (Class<? extends JComponent>)Class.forName(components[1]);
+
+            UILoader.bind(tag, type, () -> null);
+        }
+
         var typeSet = new HashSet<Class<?>>();
 
         var tags = new HashMap<Class<?>, String>();