/*
 * 03/23/2005
 *
 * FortranFileFilter.java - File filter for Fortran files.
 * Copyright (C) 2005 Robert Futrell
 * email@address.com
 * www.website.com
 *
 * This program 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
 * of the License, or 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package org.fife.ui.rtextfilechooser.filters;

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


/**
 * A file filter for <code>JFileChooser</code>s that filters everything except
 * Fortran files.
 *
 * @author Robert Futrell
 * @version 1.0
 */
public class FortranFileFilter extends FileFilter {

	private String description;

	private static final String[] extensions = {	"f",
										"for",
										"fort",
										"f77",
										"f90"
									};


/*****************************************************************************/


	/**
	 * Constructor.
	 */
	public FortranFileFilter() {
		super();
		StringBuffer buffer = new StringBuffer();
		int extensionCount = extensions.length;
		for (int i=0; i<extensionCount-1; i++)
			buffer.append("*.").append(extensions[i]).append(", ");
		buffer.append(extensions[extensionCount-1]).append(")");
		description = "Fortran Source Files (" + buffer.toString();
	}


/*****************************************************************************/


	/**
	 * Accepts all directories and all Fortran files.
	 */
	public boolean accept(File f) {

		// Accept the "file" if it is a directory.
		if (f.isDirectory()) {
			return true;
		}

		// Get the extension of the file.
		String extension = null;
		String s = f.getName();
		int i = s.lastIndexOf('.');
		if (i>0 && i<s.length()-1)
			extension = s.substring(i+1).toLowerCase();

		// Now, accept the file ONLY if it is a Fortran file.
		return extension!=null && isFortranExtension(extension);

	}


/*****************************************************************************/


	// The description of this filter.
	public String getDescription() {
		return description;
	}


/*****************************************************************************/


	/**
	 * Returns whether or not the given extension is a "Fortran" extension.
	 *
	 * @param ext The extension.
	 * @return Whether a file with that extension is a Fortran source file.
	 */
	private static final boolean isFortranExtension(String ext) {
		int extensionCount = extensions.length;
		for (int i=0; i<extensionCount; i++)
			if (extensions[i].equals(ext))
				return true;
		return false;
	}


/*****************************************************************************/

}