org.apache.poi.poifs.poibrowser.POIBrowser Maven / Gradle / Ivy
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this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
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http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
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See the License for the specific language governing permissions and
limitations under the License.
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package org.apache.poi.poifs.poibrowser;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.FileInputStream;
import java.io.IOException;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.MutableTreeNode;
import org.apache.poi.poifs.eventfilesystem.POIFSReader;
/**
* The main class of the POI Browser. It shows the structure of POI
* filesystems (Microsoft Office documents) in a {@link
* JTree}. Specify their filenames on the command line!
*
* @see POIFSReader
*
* @author Rainer Klute <[email protected]>
*/
@SuppressWarnings("serial")
public class POIBrowser extends JFrame
{
/**
* The tree's root node must be visible to all methods.
*/
protected MutableTreeNode rootNode;
/**
* Takes a bunch of file names as command line parameters,
* opens each of them as a POI filesystem and displays their
* internal structures in a {@link JTree}.
*/
public static void main(String[] args)
{
new POIBrowser().run(args);
}
protected void run(String[] args)
{
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
/* Create the tree model with a root node. The latter is
* invisible but it must be present because a tree model
* always needs a root. */
rootNode = new DefaultMutableTreeNode("POI Filesystems");
DefaultTreeModel treeModel = new DefaultTreeModel(rootNode);
/* Create the tree UI element. */
final JTree treeUI = new JTree(treeModel);
getContentPane().add(new JScrollPane(treeUI));
/* Add the POI filesystems to the tree. */
int displayedFiles = 0;
for (int i = 0; i < args.length; i++)
{
final String filename = args[i];
try
{
POIFSReader r = new POIFSReader();
r.registerListener(new TreeReaderListener(filename, rootNode));
r.read(new FileInputStream(filename));
displayedFiles++;
}
catch (IOException ex)
{
System.err.println(filename + ": " + ex);
}
catch (Exception t)
{
System.err.println("Unexpected exception while reading \"" +
filename + "\":");
t.printStackTrace(System.err);
}
}
/* Exit if there is no file to display (none specified or only
* files with problems). */
if (displayedFiles == 0)
{
System.out.println("No POI filesystem(s) to display.");
System.exit(0);
}
/* Make the tree UI element visible. */
treeUI.setRootVisible(true);
treeUI.setShowsRootHandles(true);
ExtendableTreeCellRenderer etcr = new ExtendableTreeCellRenderer();
etcr.register(DocumentDescriptor.class,
new DocumentDescriptorRenderer());
etcr.register(PropertySetDescriptor.class,
new PropertySetDescriptorRenderer());
treeUI.setCellRenderer(etcr);
setSize(600, 450);
setTitle("POI Browser 0.09");
setVisible(true);
}
}