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A Mavenized version of jregex built with a modern, no-warning compiler. I do not support jregex's codebase; this is a package for my convenience and for the convenience of others to remove some warnings that arise when using the current version of jregex available on Maven Central in an Android project.

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/**
 * Copyright (c) 2001, Sergey A. Samokhodkin
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met:
 * 
 * - Redistributions of source code must retain the above copyright notice, 
 * this list of conditions and the following disclaimer. 
 * - Redistributions in binary form 
 * must reproduce the above copyright notice, this list of conditions and the following 
 * disclaimer in the documentation and/or other materials provided with the distribution.
 * - Neither the name of jregex nor the names of its contributors may be used 
 * to endorse or promote products derived from this software without specific prior 
 * written permission. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY 
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
 * IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY 
 * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * @version 1.2_01
 */

package jregex.util.io;

import jregex.*;
import java.io.FilenameFilter;
import java.io.File;
import java.util.Enumeration;
import java.util.NoSuchElementException;

class PathElementEnumerator implements Enumeration{
   private PathElementEnumerator nextPEE;
   private PathElementMask mask;
   
   protected Enumeration entries;
   
   private Object nextObj;
   
   PathElementEnumerator(){}
   
   PathElementEnumerator(PathElementMask mask){
      this.mask=mask;
      PathElementMask nextMask=mask.next;
      if(nextMask!=null)nextPEE=nextMask.newEnumerator();
   }
   
   protected void setDir(File f){
	      entries=mask.elements(f);
   }
   
   public boolean hasMoreElements(){
      return (nextObj!=null || getNext());
   }
   
   public Object nextElement(){
      if(nextObj==null && !getNext()) throw new NoSuchElementException();
      Object tmp=nextObj;
      nextObj=null;
      return tmp;
   }
   
   private boolean getNext(){
      if(nextPEE==null){
         return (nextObj=nextPathEntry())!=null;
      }
      else{
         while(!nextPEE.hasMoreElements()){
            File f=nextPathEntry();
            if(f==null) return false;
            nextPEE.setDir(f);
         }
         nextObj=nextPEE.nextElement();
         return true;
      }
   }
   
   private File nextPathEntry(){
      if(entries==null || !entries.hasMoreElements()) return null;
      return (File)entries.nextElement();
   }
}