simplefilefilter.java

这是一个法律事务所系统源码

/*
 * Copyright (c) 1997-1999 The Java Apache Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the Java Apache 
 *    Project for use in the Apache JServ servlet engine project
 *    <http://java.apache.org/>."
 *
 * 4. The names "Apache JServ", "Apache JServ Servlet Engine" and 
 *    "Java Apache Project" must not be used to endorse or promote products 
 *    derived from this software without prior written permission.
 *
 * 5. Products derived from this software may not be called "Apache JServ"
 *    nor may "Apache" nor "Apache JServ" appear in their names without 
 *    prior written permission of the Java Apache Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the Java Apache 
 *    Project for use in the Apache JServ servlet engine project
 *    <http://java.apache.org/>."
 *    
 * THIS SOFTWARE IS PROVIDED BY THE JAVA APACHE PROJECT "AS IS" AND ANY
 * EXPRESSED 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 JAVA APACHE PROJECT OR
 * ITS 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.
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Java Apache Group. For more information
 * on the Java Apache Project and the Apache JServ Servlet Engine project,
 * please see <http://java.apache.org/>.
 *
 */

package org.apache.tomcat.loader;
// XXX move it to util
//package org.apache.java.io;

import java.io.*;

/**
 * Class that implements the java.io.FilenameFilter
 * interface.
 *
 * @author <a href="mailto:[e-mail]">Mike Jennings</a>
 * @version $Revision: 1.3 $
 */
public class SimpleFileFilter implements FilenameFilter {
     private String[] extensions;

     public SimpleFileFilter(String ext)
     {
         this(new String[]{ext});
     }

     public SimpleFileFilter(String[] exts) {
         extensions=new String[exts.length];
         for (int i=0;i<exts.length;i++) {
             extensions[i]=exts[i].toLowerCase();
         }
     }

     /** filenamefilter interface method */
     public boolean accept(File dir,String _name) {
         String name=_name.toLowerCase();
         for (int i=0;i<extensions.length;i++) {
             if (name.endsWith(extensions[i])) return true;
         }
         return false;
     }

     /** 
      * this method checks to see if an asterisk
      * is imbedded in the filename, if it is, it
      * does an "ls" or "dir" of the parent directory
      * returning a list of files that match
      * eg. /usr/home/mjennings/*.jar
      * would expand out to all of the files with a .jar
      * extension in the /usr/home/mjennings directory 
      */
      public static String[] fileOrFiles(File f) {
          if (f==null) return null;
          File parent=new File(f.getParent());
          String fname=f.getName();
          String[] files;
          if (fname.charAt(0)=='*') {
              String filter=fname.substring(1,fname.length());
              files=parent.list(new SimpleFileFilter(filter));
              return files;
          } else {
              files=new String[1];
              files[0]=f.getPath();// was:fname;
              return files;
          }
      }
}