com.groupbyinc.common.jregex.util.io.ListEnumerator Maven / Gradle / Ivy
/**
* 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;
public class ListEnumerator extends Enumerator{
public interface Instantiator{
public File instantiate(File dir,String name);
}
public static final Instantiator defaultInstantiator=new Instantiator(){
public File instantiate(File dir,String name){
File f= dir==null? new File(name): new File(dir,name);
//return f.exists()? f: null;
return f;
}
};
private String[] list;
private File dir;
private Instantiator instantiator;
private int index=0;
public ListEnumerator(File dir, Instantiator i){
this(dir,dir.list(),i);
}
public ListEnumerator(File dir, String[] names, Instantiator i){
if(names==null) throw new IllegalArgumentException();
if(i==null) throw new IllegalArgumentException();
this.dir=dir;
this.list=names;
this.instantiator=i;
}
protected boolean find(){
//System.out.println(" PathElementMask.elements().find():");
File dir=this.dir;
Instantiator instantiator=this.instantiator;
while(index