concatenumeration.java

树形的java classloader,树形的java classloader,树形的java classloader,

package org.codehaus.classloader;

import java.util.Enumeration;

final class ConcatEnumeration implements Enumeration {
  private final Enumeration e1;
  private final Enumeration e2;
  private Enumeration cur;
  public boolean hasMoreElements() {
    return e1.hasMoreElements() || e2.hasMoreElements();
  }

  public Object nextElement() {
    if(!cur.hasMoreElements()){
      cur = e2;
    }
    return cur.nextElement();
  }

  ConcatEnumeration(Enumeration e1, Enumeration e2) {
    this.e1 = e1;
    this.e2 = e2;
    this.cur = e1;
  }
}