Subversion Repositories openrisc

/* ClassMatchFilter.java -- filter on class name (inclusive)

   Copyright (C) 2005 Free Software Foundation

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2, or (at your option)

any later version.

GNU Classpath is distributed in the hope that it will be useful, but

WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

General Public License for more details.

You should have received a copy of the GNU General Public License

along with GNU Classpath; see the file COPYING.  If not, write to the

Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301 USA.

Linking this library statically or dynamically with other modules is

making a combined work based on this library.  Thus, the terms and

conditions of the GNU General Public License cover the whole

combination.

As a special exception, the copyright holders of this library give you

permission to link this library with independent modules to produce an

executable, regardless of the license terms of these independent

modules, and to copy and distribute the resulting executable under

terms of your choice, provided that you also meet, for each linked

terms of your choice, provided that you also meet, for each linked

independent module, the terms and conditions of the license of that

module.  An independent module is a module which is not derived from

or based on this library.  If you modify this library, you may extend

this exception to your version of the library, but you are not

obligated to do so.  If you do not wish to do so, delete this

exception statement from your version. */

package gnu.classpath.jdwp.event.filters;

import gnu.classpath.jdwp.event.Event;

import gnu.classpath.jdwp.exception.InvalidStringException;

/**

 * An event filter which includes events matching a

 * specified class pattern (exact match or start/end with "*").

 *

 * @author Keith Seitz  (keiths@redhat.com)

 */

public class ClassMatchFilter

  implements IEventFilter

{

  // Pattern to match

  private String _pattern;

  /**

   * Constructs a new <code>ClassMatchFilter</code>

   *

   * @param  pattern  the pattern to use

   * @throws InvalidStringException  if pattern is invalid

   */

  public ClassMatchFilter (String pattern)

    throws InvalidStringException

  {

    int index = pattern.indexOf ('*');

    if (index != -1 && index != 0 && index != (pattern.length () - 1))

      {

        // '*' must be first char or last char

        throw new InvalidStringException ("pattern may be an exact match or "

                                          + "start/end with \"*\"");

      }

    _pattern = pattern;

  }

  /**

   * Returns the pattern to be matched

   *

   * @return the pattern

   */

  public String getPattern ()

  {

    return _pattern;

  }

  /**

   * Does the given event match the filter?

   *

   * @param event  the <code>Event</code> to scrutinize

   */

  public boolean matches (Event event)

  {

    Object type = event.getParameter (Event.EVENT_CLASS);

    if (type != null)

      {

        Class eventClass = (Class) type;

        String name = eventClass.getName ();

        if (_pattern.startsWith ("*"))

          return name.endsWith (_pattern.substring (1));

        else if (_pattern.endsWith ("*"))

          {

            int end = _pattern.length () - 1;

            return name.startsWith (_pattern.substring (0, end));

          }

        else

          return name.matches (_pattern);

      }

    return false;

  }

}