/*\
 * Copyright  2006 Klaus Rogall, Hamburg, Germany (klaus.rogall@web.de). All rights reserved.
 * _____________________________________________________________________________________________________________________
 * 
 * This class is "Open Source" as defined by the Open Source Initiative (OSI). You can redistribute it and/or modify it
 * under the terms of the BSD License. The license text is appended to the end of this file.
\*/

package de.klaro.base.util;

import java.io.File;
import java.io.FileFilter;
import java.io.FilenameFilter;


/**
 * Abstrakte Implementation eines Dateinamen-Filters.
 * 
 * Diese Implementation implementiert das Interface FilenameFilter, kann aber auch eine Implementation des Interfaces
 * FileFilter liefern. Es wurde bewusst darauf verzichtet, beide Interfaces zu implementieren, weil sonst bei der
 * Benutzung dieser Klasse Ambiguitten auftreten, die nur durch einen zustzlichen Type-Cast aufgelst werden knnen.  
 */

public abstract class AbstractFileNameFilter extends Object implements FilenameFilter
{

    /* ______________________________________________________________________________________________________________ *\
    \* Konstanten                                                                                                     */


    /* ______________________________________________________________________________________________________________ *\
    \* Klassenvariablen                                                                                               */


    /* ______________________________________________________________________________________________________________ *\
    \* Instanzvariablen                                                                                               */
    

    /* ______________________________________________________________________________________________________________ *\
    \* Konstruktoren                                                                                                  */


    /**
     * Erzeugt einen Filter.
     */

    public AbstractFileNameFilter()
    {
        super();
    }


    /* ______________________________________________________________________________________________________________ *\
    \* Instanzmethoden                                                                                                */

    
    /**
     * Liefert einen Datei-Filter, der dieselbe Prfung wie der Dateinamen-Filter ausfhrt.
     * 
     * @return                  Der Datei-Filter
     */
    
    public FileFilter toFileFilter() // TODO Logik umdrehen: XXXFileFilter hat Methode toFileNameFilter, dann ist auch Directory-Filter mglich
    {
        return new FileFilter() {
            public boolean accept(File file)
            {
                return AbstractFileNameFilter.this.accept(file.getParentFile(),file.getName());
            }
        };
    }


    /* ______________________________________________________________________________________________________________ *\
    \* Klassenmethoden                                                                                                */


    /* ______________________________________________________________________________________________________________ *\
    \* Klassen                                                                                                        */
}

/*\
 * _____________________________________________________________________________________________________________________
 * 
 * This software is distributed under the terms of the BSD License:
 * 
 * Copyright  2006 Klaus Rogall, Hamburg, Germany (klaus.rogall@web.de). 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 the Klaus Rogall 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 COPYRIGHT OWNER 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.
 * _____________________________________________________________________________________________________________________
\*/