import com.sun.org.apache.xpath.internal.ExpressionNode; //导入依赖的package包/类
/**
 * Create an XRTreeFrag Object.
 *
 */
public XRTreeFrag(int root, XPathContext xctxt, ExpressionNode parent)
{
  super(null);
  exprSetParent(parent);
  initDTM(root, xctxt);
}
 

import com.sun.org.apache.xpath.internal.ExpressionNode; //导入依赖的package包/类
/**
 * Set the parent node.
 * For an extension function, we also need to set the parent
 * node for all argument expressions.
 *
 * @param n The parent node
 */
public void exprSetParent(ExpressionNode n)
{

  super.exprSetParent(n);

  int nArgs = m_argVec.size();

  for (int i = 0; i < nArgs; i++)
  {
    Expression arg = (Expression) m_argVec.elementAt(i);

    arg.exprSetParent(n);
  }
}