001// Copyright (c) 2001 Hursh Jain (http://www.mollypages.org) 
002// The Molly framework is freely distributable under the terms of an
003// MIT-style license. For details, see the molly pages web site at:
004// http://www.mollypages.org/. Use, modify, have fun !
005
006package fc.io.fileselectors;
007
008import java.io.*;
009import java.util.*;
010
011/**
012Filters a list of files lesser or equal to some specified size.
013Negative values or a zero size value chooses <b>all</b> files. Note: 
014file sizes are only applicable to normal files, <b>not</b> directories.
015(a java.io.File api restriction). If the target file is a directory,
016this selector always returns <b>true</b>.
017
018@author hursh jain
019@date   3/24/2002
020**/   
021  
022public class MaxSizeSelector extends ChainedFileSelector 
023{
024long filesize;
025/** 
026@param filesize   the required file size in bytes
027*/
028public MaxSizeSelector(long filesize) { 
029  this(filesize, null);
030  }
031
032/** 
033@param  filesize  the required file size in bytes
034@param  filter    the next filter in the chain
035*/
036public MaxSizeSelector(long filesize, ChainedFileSelector filter) { 
037  super(filter);
038  this.filesize = filesize;
039  }
040
041protected boolean thisfilter(File name) { 
042  if ( name.isDirectory() ) return true;
043  if ( name.length() <= filesize ) return true; 
044  //System.out.println("rejecting: " + name + ", size = " + name.length());
045  return false;
046  }
047  
048public static void main(String[] args) throws Exception
049  {
050  new Test();
051  }
052
053/**
054Unit Test History   
055<pre>
056Class Version Tester  Status    Notes
0571.0       hj    passed  
058</pre>
059*/
060static private class Test {
061Test() throws Exception
062  {
063  File startdir = new File("c:\\temp");
064  ChainedFileSelector sel = new MaxSizeSelector(4);
065  File[] files = startdir.listFiles(sel);
066  List list = Arrays.asList(files);     
067  System.out.println("total="+ list.size() + ", files=" + list);
068  }
069} //~class Test
070
071}