Master/Reference Architectures and Patterns/hjp5/examples/DefaultTreeNode.java


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/* DefaultTreeNode.java */

public class DefaultTreeNode
implements SimpleTreeNode
{
  private int              CAPACITY;
  private String           name;
  private SimpleTreeNode[] childs;
  private int              childcnt;

  public DefaultTreeNode(String name)
  {
    this.CAPACITY = 5;
    this.name     = name;
    this.childs   = new SimpleTreeNode[CAPACITY];
    this.childcnt = 0;
  }

  public void addChild(SimpleTreeNode child)
  {
    if (childcnt >= CAPACITY) {
      CAPACITY *= 2;
      SimpleTreeNode[] newchilds = new SimpleTreeNode[CAPACITY];
      for (int i = 0; i < childcnt; ++i) {
        newchilds[i] = childs[i];
      }
      childs = newchilds;
    }
    childs[childcnt++] = child;
  }

  public int getChildCnt()
  {
    return childcnt;
  }

  public SimpleTreeNode getChild(int pos)
  {
    return childs[pos];
  }

  public String toString()
  {
    return name;
  }
}