package com.jclark.xsl.tr;

import java.util.Enumeration;

public
class ComposeEnumeration implements Enumeration {
  private Enumeration top;
  private Enumeration cur;

  public ComposeEnumeration(Enumeration top) {
    this.top = top;
    this.cur = top.hasMoreElements() ? (Enumeration)top.nextElement() : top;
  }

  public boolean hasMoreElements() {
    for (; !cur.hasMoreElements(); cur = (Enumeration)top.nextElement()) {
      if (!top.hasMoreElements())
	return false;
    }
    return true;
  }
  public Object nextElement() {
    for (; !cur.hasMoreElements(); cur = (Enumeration)top.nextElement())
      ;
    return cur.nextElement();
  }
}