Writer.java

package com.jds.jn.logs;

import java.awt.HeadlessException;
import java.io.File;
import java.util.HashMap;

import javax.swing.JFileChooser;
import javax.swing.filechooser.FileFilter;

import com.jds.jn.config.RValues;
import com.jds.jn.gui.forms.MainForm;
import com.jds.jn.logs.writers.AbstractWriter;
import com.jds.jn.logs.writers.JNL2Writer;
import com.jds.jn.session.Session;
import com.jds.jn.util.RunnableImpl;
import com.jds.jn.util.ThreadPoolManager;

/**
 * Author: VISTALL
 * Company: J Develop Station
 * Date: 23.09.2009
 * Time: 21:41:42
 */
public class Writer
{
	private static Writer _instance;
	private HashMap<String, AbstractWriter> _writers = new HashMap<String, AbstractWriter>();

	public static Writer getInstance()
	{
		if (_instance == null)
		{
			_instance = new Writer();
		}

		return _instance;
	}

	private Writer()
	{
		addWriter(new JNL2Writer());
	}

	public void addWriter(AbstractWriter r)
	{
		_writers.put(r.getFileExtension(), r);
	}

	public void chooseDialog()
	{
		try
		{
			final JFileChooser c = new JFileChooser(RValues.LAST_FOLDER.asString());
			for(AbstractWriter w : _writers.values())
				c.addChoosableFileFilter(new WriterFileFilter(w));
			c.setAcceptAllFileFilterUsed(false);

			final int r = c.showSaveDialog(MainForm.getInstance());

			if (r == JFileChooser.APPROVE_OPTION)
			{
				ThreadPoolManager.getInstance().execute(new RunnableImpl()
				{
					@Override
					public void runImpl()
					{
						Session session = MainForm.getInstance().getViewTabbedPane().getSelectedComponent().getSession();

						if (session == null)
						{
							return;
						}

						AbstractWriter w = ((WriterFileFilter)c.getFileFilter()).getWriter();

						try
						{
							if(!c.getSelectedFile().getName().contains(w.getFileExtension()))
							{
								w.write(new File(c.getSelectedFile().getAbsolutePath() + "." + w.getFileExtension()), session);
							}
							else
							{
								w.write(c.getSelectedFile(), session);
							}
						}
						catch (Exception e)
						{
							e.printStackTrace();
						}
					}
				});
			}
		}
		catch (HeadlessException e)
		{
			e.printStackTrace();
		}
	}

	private class WriterFileFilter extends FileFilter
	{
		private final AbstractWriter _writer;

		public WriterFileFilter(AbstractWriter writer)
		{
			_writer = writer;
		}

		@Override
		public boolean accept(File f)
		{
			return f.isDirectory() || f.isFile() && f.getName().endsWith("." +  _writer.getFileExtension());
		}

		@Override
		public String getDescription()
		{
			return String.format("%s (.%s)", _writer.getWriterInfo(), _writer.getFileExtension());
		}

		public AbstractWriter getWriter()
		{
			return _writer;
		}
	}
}