import java.util.Vector;

class cFilter extends Vector<String>
        implements java.io.FileFilter
{
    public cFilter()
    {
    }

    public cFilter(String ext)
    {
        add(ext);
    }

    public boolean accept(java.io.File f)
    {
        if (f.getName().startsWith("."))
            return false;
        
        if( f.isDirectory() )
            return true;

        if (size() == 0)
            return true;
            
        String suffix = getSuffix(f);
        
        if( suffix == null)
            return true;

        for(String ext : this)
        {
            if(suffix.toLowerCase().equals(ext))
                return true;
        }

        return false;
    }

    private String getSuffix(java.io.File f)
    {
        String s = f.getPath(), suffix = null;
        int i = s.lastIndexOf('.');

        if (i > 0 && i < s.length() - 1)
        {
            suffix = s.substring(i + 1).toLowerCase();
        }

        return suffix;
    }
}