node.java

来自「有关编译器的编译器.」· Java 代码 · 共 79 行

/* This file was generated by SableCC (http://www.sablecc.org/). */

package org.sablecc.sablecc.node;

import java.util.*;
import org.sablecc.sablecc.analysis.*;

public abstract class Node implements Switchable, Cloneable
{
  private Node parent;

  public abstract Object clone();

  public Node parent()
  {
    return parent;
  }

  void parent(Node parent)
  {
    this.parent = parent;
  }

  abstract void removeChild(Node child);
  abstract void replaceChild(Node oldChild, Node newChild);

  public void replaceBy(Node node)
  {
    if(parent != null)
    {
      parent.replaceChild(this, node);
    }
  }

  protected String toString(Node node)
  {
    if(node != null)
    {
      return node.toString();
    }

    return "";
  }

  protected String toString(List list)
  {
    StringBuffer s = new StringBuffer();

    for(Iterator i = list.iterator(); i.hasNext();)
    {
      s.append(i.next());
    }

    return s.toString();
  }

  protected Node cloneNode(Node node)
  {
    if(node != null)
    {
      return (Node) node.clone();
    }

    return null;
  }

  protected List cloneList(List list)
  {
    List clone = new LinkedList();

    for(Iterator i = list.iterator(); i.hasNext();)
    {
      clone.add(((Node) i.next()).clone());
    }

    return clone;
  }
}