NET/worlds/scape/AddObjectAction.java


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package NET.worlds.scape;

import java.io.IOException;
import java.util.Vector;

public class AddObjectAction extends SetPropertyAction {
   private SuperRoot _value;
   private static Object classCookie = new Object();

   @Override
   public Persister trigger(Event e, Persister seqID) {
      assert !this.useParam();

      this.add((Object)this._value);
      return null;
   }

   @Override
   public Object properties(int index, int offset, int mode, Object value) throws NoSuchPropertyException {
      Object ret = null;
      switch (index - offset) {
         case 0:
            if (mode == 0) {
               VectorProperty vp = new VectorProperty(this, index, "Object to Add");
               if (this._value != null) {
                  vp.allowSetNull();
                  ret = vp;
               }
            } else if (mode == 1) {
               ret = new Vector(1);
               if (this._value != null) {
                  ((Vector)ret).addElement(this._value);
               }
            } else if (mode == 4) {
               assert value == this._value;

               this._value = null;
            } else if (mode == 3) {
               assert this._value == null;

               this._value = (SuperRoot)value;
            }
            break;
         default:
            ret = super.properties(index, offset + 1, mode, value);
      }

      return ret;
   }

   @Override
   public void saveState(Saver s) throws IOException {
      s.saveVersion(1, classCookie);
      super.saveState(s);
      s.saveMaybeNull(this._value);
   }

   @Override
   public void restoreState(Restorer r) throws IOException, TooNewException {
      switch (r.restoreVersion(classCookie)) {
         case 1:
            super.restoreState(r);
            this._value = (SuperRoot)r.restoreMaybeNull();
            return;
         default:
            throw new TooNewException();
      }
   }
}