import com.sun.org.apache.xml.internal.utils.QName; //导入依赖的package包/类
/**
 * Compile a variable reference.
 *
 * @param opPos The current position in the m_opMap array.
 *
 * @return reference to {@link com.sun.org.apache.xpath.internal.operations.Variable} instance.
 *
 * @throws TransformerException if a error occurs creating the Expression.
 */
protected Expression variable(int opPos) throws TransformerException
{

  Variable var = new Variable();

  opPos = getFirstChildPos(opPos);

  int nsPos = getOp(opPos);
  java.lang.String namespace
    = (OpCodes.EMPTY == nsPos) ? null
                                 : (java.lang.String) getTokenQueue().elementAt(nsPos);
  java.lang.String localname
    = (java.lang.String) getTokenQueue().elementAt(getOp(opPos+1));
  QName qname = new QName(namespace, localname);

  var.setQName(qname);

  return var;
}
 

import com.sun.org.apache.xml.internal.utils.QName; //导入依赖的package包/类
/**
 * Construct a dummy parameter argument, with no QName and no
 * value (either expression string or value XObject). isVisible
 * defaults to true.
 */
public Arg()
{

  m_qname = new QName("");
     // so that string compares can be done.
  m_val = null;
  m_expression = null;
  m_isVisible = true;
  m_isFromWithParam = false;
}
 

import com.sun.org.apache.xml.internal.utils.QName; //导入依赖的package包/类
/**
 * Equality function specialized for the variable name.  If the argument
 * is not a qname, it will deligate to the super class.
 *
 * @param   obj   the reference object with which to compare.
 * @return  <code>true</code> if this object is the same as the obj
 *          argument; <code>false</code> otherwise.
 */
@Override
public boolean equals(Object obj)
{
  if(obj instanceof QName)
  {
    return m_qname.equals(obj);
  }
  else
    return super.equals(obj);
}
 

import com.sun.org.apache.xml.internal.utils.QName; //导入依赖的package包/类
/**
 * This function is used to fixup variables from QNames to stack frame
 * indexes at stylesheet build time.
 * @param vars List of QNames that correspond to variables.  This list
 * should be searched backwards for the first qualified name that
 * corresponds to the variable reference qname.  The position of the
 * QName in the vector from the start of the vector will be its position
 * in the stack frame (but variables above the globalsTop value will need
 * to be offset to the current stack frame).
 */
public void fixupVariables(java.util.Vector vars, int globalsSize)
{
  m_fixUpWasCalled = true;
  int sz = vars.size();

  for (int i = vars.size()-1; i >= 0; i--)
  {
    QName qn = (QName)vars.elementAt(i);
    // System.out.println("qn: "+qn);
    if(qn.equals(m_qname))
    {

      if(i < globalsSize)
      {
        m_isGlobal = true;
        m_index = i;
      }
      else
      {
        m_index = i-globalsSize;
      }

      return;
    }
  }

  java.lang.String msg = XSLMessages.createXPATHMessage(XPATHErrorResources.ER_COULD_NOT_FIND_VAR,
                                           new Object[]{m_qname.toString()});

  TransformerException te = new TransformerException(msg, this);

  throw new com.sun.org.apache.xml.internal.utils.WrappedRuntimeException(te);

}