globfilenamefilter.java

java实现正则表达式的代码

/*
 * $Id: GlobFilenameFilter.java,v 1.7 2003/11/07 20:16:23 dfs Exp $
 *
 * ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2000 The Apache Software Foundation.  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. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
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 *    must not be used to endorse or promote products derived from this
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 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
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 */


package org.apache.oro.io;

import java.io.*;

import org.apache.oro.text.regex.*;
import org.apache.oro.text.*;

/**
 * GlobFilenameFilter is a RegexFilenameFilter subclass that filters on Glob
 * regular expressions as implemented by the org.apache.oro.text package,
 * which is required to use this class.
 *
 * @version @version@
 * @since 1.0
 * @see RegexFilenameFilter
 * @see AwkFilenameFilter
 * @see GlobFilenameFilter
 */
public class GlobFilenameFilter extends RegexFilenameFilter {
  private static final PatternMatcher __MATCHER = new Perl5Matcher();
  private static final PatternCache __CACHE = 
                             new PatternCacheLRU(new GlobCompiler());

  /**
   * Construct a filter initialized with the indicated regular expression
   * and accompanying compilation options conforming to those used by
   * <code> org.apache.oro.text.GlobCompiler </code>
   * <p>
   * @param regex  The regular expression on which to filter.
   * @param options A set of compilation options.
   * @exception MalformedCachePatternException  If there is an error in
   *     compiling the regular expression.  This need not be caught if
   *     you are using a hard-coded expression that you know is correct.
   *     But for robustness and reliability you should catch this exception
   *     for dynamically entered expressions determined at runtime.
   */
  public GlobFilenameFilter(String regex, int options) {
    super(__CACHE, __MATCHER, regex, options);
  }

  /** Same as GlobFilenameFilter(regex, GlobCompiler.DEFAULT_MASK); */
  public GlobFilenameFilter(String regex) {
    super(__CACHE, __MATCHER, regex);
  }

  /** Same as GlobFilenameFilter(""); */
  public GlobFilenameFilter() {
    super(__CACHE, __MATCHER);
  }
}