/******************************************************************************
* __ *
* <-----/@@\-----> *
* <-< < \\// > >-> *
* <-<-\ __ /->-> *
* Data / \ Crow *
* ^ ^ *
* info@datacrow.net *
* *
* This file is part of Data Crow. *
* Data Crow 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 3 of the License, or any later version. *
* *
* Data Crow 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, see http://www.gnu.org/licenses *
* *
******************************************************************************/
package net.datacrow.console.components.panels;
import java.awt.GridBagConstraints;
import java.awt.Insets;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.InputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import javax.swing.JFileChooser;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import net.datacrow.console.ComponentFactory;
import net.datacrow.console.Layout;
import net.datacrow.console.components.DcLongTextField;
import org.apache.log4j.Logger;
public class BackupFilePreviewPanel extends JPanel implements PropertyChangeListener {
private static Logger logger = Logger.getLogger(BackupFilePreviewPanel.class.getName());
private DcLongTextField preview = ComponentFactory.getLongTextField();
public BackupFilePreviewPanel() {
build();
}
@Override
public void propertyChange(PropertyChangeEvent e) {
String propertyName = e.getPropertyName();
// Make sure we are responding to the right event.
if (propertyName.equals(JFileChooser.SELECTED_FILE_CHANGED_PROPERTY)) {
preview.setText("");
File selection = (File)e.getNewValue();
try {
if (!selection.isFile()) return;
ZipFile zf = new ZipFile(selection);
ZipEntry ze = zf.getEntry("version.txt");
if (ze != null) {
InputStream is = zf.getInputStream(ze);
BufferedInputStream bis = new BufferedInputStream(is);
StringBuffer sb = new StringBuffer();
byte[] b = new byte[4096];
for (int n; (n = bis.read(b)) != -1;)
sb.append(new String(b, 0, n));
bis.close();
is.close();
preview.setText(sb.toString());
}
} catch (Exception exp) {
logger.error(exp, exp);
}
}
}
private void build() {
setLayout(Layout.getGBL());
JScrollPane scroller = new JScrollPane(preview);
scroller.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
add(scroller, Layout.getGBC( 0, 0, 1, 1, 1.0, 1.0
,GridBagConstraints.NORTHWEST, GridBagConstraints.BOTH,
new Insets( 0, 5, 0, 5), 0, 0));
}
@Override
protected void finalize() throws Throwable {
super.finalize();
preview = null;
removeAll();
}
}