CommFile.java

package uonlineeditor;

import au.com.bytecode.opencsv.CSVReader;
import au.com.bytecode.opencsv.CSVWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JFileChooser;
import javax.swing.filechooser.FileNameExtensionFilter;
import java.util.regex.*;

/**
 *
 * @author houjing
 */
public abstract class CommFile {

	private JFileChooser fc;
	protected File file;
	public boolean approved = false;
	public static int OPEN = 0;
	public static int SAVE = 1;

	public CommFile(int mode) {
		int ret;
		fc = new JFileChooser();

		if (mode == OPEN) {
			fc.setDialogType(JFileChooser.OPEN_DIALOG);
			fc.setFileFilter(getFileFilter());
			ret = fc.showDialog(null, null);
		}
		else if (mode == SAVE) {
			fc.setDialogType(JFileChooser.SAVE_DIALOG);
			fc.setFileFilter(getFileFilter());
			ret = fc.showDialog(null, null);
		}
		else ret = JFileChooser.CANCEL_OPTION;

		if (ret == JFileChooser.APPROVE_OPTION) {
			file = fc.getSelectedFile();
			String ext = ((FileNameExtensionFilter) fc.getFileFilter()).getExtensions()[0];
			if (!Pattern.compile(".+\\."+ext+"$").matcher(file.getAbsolutePath()).matches()) file = new File(file.getAbsolutePath() + "." + ext);
			approved = true;
		}
		else approved = false;
	}

	protected CSVReader getCsvReader() {
		CSVReader cr = null;
		try {
			System.out.println(file);
			FileReader fr = new FileReader(file);
			cr = new CSVReader(fr);
		} catch (FileNotFoundException ex) { Logger.getLogger(AreasFile.class.getName()).log(Level.SEVERE, null, ex); }
		return cr;
	}

	protected CSVWriter getCsvWriter() {
		CSVWriter cw = null;
		try {
			cw = new CSVWriter(new FileWriter(file));
		} catch (IOException ex) { Logger.getLogger(AreasFile.class.getName()).log(Level.SEVERE, null, ex); }
		return cw;
	}

	public abstract FileNameExtensionFilter getFileFilter();

}