package jp.co.ntl.swing.ext;

import java.io.File;

import javax.swing.filechooser.FileFilter;

public class CSVFileFilter extends FileFilter {
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	public final static String	csv = "csv";
		
	public boolean accept(File f) {
		if (f.isDirectory()) {
			return true;
		}
			
		String	extension = getExtension(f);
		if (extension != null) {
			if (extension.equals(csv)) {
				return true;
			}
		}
			
		return false;
	}
	
	public String getExtensionString() {
		return csv;
	}
		
	public String getDescription() {
		return new String("CSV File");
	}
		
	private String getExtension(File f) {
		String	ext = null;
		String	s = f.getName();
		int	i = s.lastIndexOf('.');
			
		if (i > 0 && i < s.length() - 1) {
			ext = s.substring(i + 1).toLowerCase();
		}
		return ext;
	}
}