package com.treelight.krnl;

import java.util.LinkedList;

/**
 * A list of structure nodes.
 *
 * @version 0.1
 * @author Eric Armstrong
 * @see ../NodesAndLists.html
 */
public abstract class StructureList extends AbstractList {
  static final String type = STRUCTURE_LIST;

  private LinkedList list = new LinkedList();

  public void add(StructureNode node) 
    list.add(node); 
  }

  public void remove(StructureNode targetNode)
  throws ItemNotFoundException { 
    Iterator lit = list.listIterator();
    while (lit.hasNext()) {
      StructureNode currNode = (StructureNode) lit.next();
      if (currNode.equals(targetNode)) {
        lit.remove();
        return; // successful
      }
    }
    throw new ItemNotFoundException();
  }

  public StructureNode get(int n) { return (StructureNode) list.get(n); }

  public void replace(int n, StructureNode node) { 
    // ___TODO___
  }

}//StructureList