extensionfilefilter.java

非常有用的操作pdf文件的java源码

/**
 * Copyright (c) 2006, www.pdfbox.org
 * 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. Neither the name of pdfbox; 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 REGENTS 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.
 *
 * http://www.pdfbox.org
 *
 */
package org.pdfbox.util;

import java.io.File;
import javax.swing.filechooser.FileFilter;


/**
 * A FileFilter that will only accept files of a certain extension.
 * 
 * @author <a href="mailto:[e-mail]">Ben Litchfield</a>
 * @version $Revision: 1.2 $
 */
public class ExtensionFileFilter extends FileFilter
{
    private String[] extensions = null;
    private String desc;
    
    /**
     * Constructor.
     * 
     * @param ext A list of filename extensions, ie new String[] { "PDF"}.
     * @param description A description of the files.
     */
    public ExtensionFileFilter( String[] ext, String description )
    {
        extensions = ext;
        desc = description;
    }

    /**
     * {@inheritDoc}
     */
    public boolean accept(File pathname)
    {
        boolean acceptable = false;
        String name = pathname.getName().toUpperCase();
        for( int i=0; !acceptable && i<extensions.length; i++ )
        {
            if( name.endsWith( extensions[i].toUpperCase() ) )
            {
                acceptable = true;
            }
        }
        return acceptable;
    }
    
    /**
     * {@inheritDoc}
     */
    public String getDescription()
    {
        return desc;
    }
}