package NET.worlds.scape;

import NET.worlds.core.Std;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;

public class ForwardAttribute extends Attribute implements NonPersister {
   private Attribute _from;

   ForwardAttribute(Attribute forwarder, int attrID) {
      super(attrID);
      this._from = forwarder;
   }

   @Override
   protected void noteAddingTo(SuperRoot owner) {
      WObject w = (WObject)owner.getOwner();
      if ((w.getSharer().getMode() & 1) != 0) {
         throw new ClassCastException("Must forward to unforwarded object");
      }
   }

   @Override
   public void detach() {
      super.detach();
      this._from.unforward();
   }

   @Override
   public int getFlags() {
      return this._from.getFlags();
   }

   @Override
   public void setFlag(int flag, boolean onoff) {
      this._from.setFlag(flag, onoff);
   }

   @Override
   public void generateNetData(DataOutputStream s) throws IOException {
      this._from.generateNetData(s);
   }

   @Override
   public void setFromNetData(DataInputStream ds, int len) throws IOException {
      this._from.setFromNetData(ds, len);
      ValueEvent e = new ValueEvent(Std.getFastTime(), this._from.getOwner(), (WObject)this._from.getOwner().getOwner(), this._from);
      this._from.trigger(e);
   }

   @Override
   public String toString() {
      return super.toString() + "[forwarded from " + this._from.getName() + "]";
   }

   @Override
   public void restoreState(Restorer r) throws IOException, TooNewException {
      assert false;
   }
}