org.docx4all.vfs.FileNameExtensionFilter.java Source code

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Here is the source code for org.docx4all.vfs.FileNameExtensionFilter.java

Source

/*
 *  Copyright 2007, Plutext Pty Ltd.
 *   
 *  This file is part of Docx4all.
    
Docx4all is free software: you can redistribute it and/or modify
it under the terms of version 3 of the GNU General Public License 
as published by the Free Software Foundation.
    
Docx4all 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 Docx4all.  If not, see <http://www.gnu.org/licenses/>.
    
 */

package org.docx4all.vfs;

import javax.swing.filechooser.FileView;

import net.sf.vfsjfilechooser.filechooser.AbstractVFSFileFilter;
import net.sf.vfsjfilechooser.utils.VFSUtils;

import org.apache.commons.vfs.FileObject;

/**
 *   @author Jojada Tirtowidjojo - 25/03/2008
 */
public class FileNameExtensionFilter extends AbstractVFSFileFilter {
    private final String filterDesc;
    private final String[] filteredFileExtensions;

    private final String[] lowerCaseExtensions;

    public FileNameExtensionFilter(String filterDesc, String... filteredFileExtensions) {
        if (filteredFileExtensions == null || filteredFileExtensions.length == 0) {
            throw new IllegalArgumentException("FilteredFileExtensions must NOT be null or empty");
        }

        this.filterDesc = filterDesc;
        this.filteredFileExtensions = new String[filteredFileExtensions.length];
        this.lowerCaseExtensions = new String[filteredFileExtensions.length];

        for (int i = 0; i < filteredFileExtensions.length; i++) {
            if (filteredFileExtensions[i] == null || filteredFileExtensions[i].length() == 0) {
                throw new IllegalArgumentException("Each FilteredFileExtension must NOT be null or empty");
            }
            this.filteredFileExtensions[i] = filteredFileExtensions[i];
            lowerCaseExtensions[i] = filteredFileExtensions[i].toLowerCase();
        }
    }

    /**
     * Whether the given file is accepted by this filter.
     * @param f
     * @return
     */
    public boolean accept(FileObject f) {
        boolean isAccepted = false;

        if (f != null) {
            if (VFSUtils.isDirectory(f)) {
                isAccepted = true;

            } else {
                String fext = f.getName().getExtension().toLowerCase();
                for (String extension : lowerCaseExtensions) {
                    if (fext.equals(extension)) {
                        isAccepted = true;
                        break;
                    }
                }
            }
        }

        return isAccepted;
    }

    /**
    * The description of this filter. For example: "JPG and GIF Images"
    * 
    * @return
    * @see FileView#getName
    */
    public String getDescription() {
        return this.filterDesc;
    }

    public String toString() {
        return getDescription();
    }

}// FileNameExtensionFilter class