/*
* $Id: FileChooser.java,v 1.1 2005/05/25 19:56:22 ahmed Exp $
*
* 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 (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 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 jaligner.ui.filechooser;
import java.io.InputStream;
/**
* Opens and saves files.
*
* @author Ahmed Moustafa (ahmed@users.sf.net)
*/
public abstract class FileChooser {
/**
* Buffer size while reading from or write to a file (4 KB)
*/
public static final int BUFFER_SIZE = 4096;
private String userDir = null;
/**
* Shows a dialog to select a file
*
* @return InputStream
* @throws FileChooserException
*/
public abstract NamedInputStream open() throws FileChooserException;
/**
* Saves an input stream to a file
*
* @param is
* @param fileName
* @return boolean
* @throws FileChooserException
*/
public abstract boolean save(InputStream is, String fileName) throws FileChooserException;
/**
* Gets the current user working directory
* @return current working directory
*/
public String getUserDirectory ( ) {
if (userDir == null) {
userDir = System.getProperty("user.home");
}
return userDir;
}
/**
* Sets the user working directory
* @param userDir The user directory to set
*/
public void setUserDirectory (String userDir) {
this.userDir = userDir;
}
}