NET/worlds/console/TreeNode.java


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package NET.worlds.console;

import java.util.Vector;

public abstract class TreeNode {
   private int level;
   private TreeNode parent;
   private boolean isOpen;

   protected TreeNode(TreeNode parent) {
      this.parent = parent;
      if (parent != null) {
         this.level = parent.getLevel() + 1;
      }
   }

   public int getLevel() {
      return this.level;
   }

   public TreeNode getParent() {
      return this.parent;
   }

   public boolean isDescendant(TreeNode e) {
      while (e != null) {
         if ((e = e.getParent()) == this) {
            return true;
         }
      }

      return false;
   }

   public boolean isOpen() {
      return this.isOpen;
   }

   public void setOpen(boolean isOpen) {
      this.isOpen = isOpen;
   }

   public boolean displayAsTitle() {
      return false;
   }

   @Override
   public boolean equals(Object obj) {
      return obj instanceof TreeNode && this.getObject().equals(((TreeNode)obj).getObject());
   }

   @Override
   public int hashCode() {
      return this.getObject().hashCode();
   }

   public abstract Vector<?> getChildren();

   public boolean shouldSort() {
      return true;
   }

   public abstract Object getObject();
}