/*
 * Copyright 2010, 2011, 2012 mapsforge.org
 *
 * This program is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * This program 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.oscim.android.filepicker;

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

/**
 * Accepts all readable directories and all readable files with a given
 * extension.
 */
public class FilterByFileExtension implements FileFilter {
    private final String mExtension;

    /**
     * @param extension the allowed file name extension.
     */
    public FilterByFileExtension(String extension) {
        mExtension = extension;
    }

    @Override
    public boolean accept(File file) {
        // accept only readable files
        if (file.canRead()) {
            if (file.isDirectory()) {
                // accept all directories
                return true;
            } else if (file.isFile() && file.getName().endsWith(mExtension)) {
                return true;
            }
        }
        return false;
    }
}
