/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* 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
* the License. You may obtain a copy of the License at
*
* 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,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.wicket.examples.upload;
import java.io.File;
import java.util.Arrays;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.wicket.Application;
import org.apache.wicket.PageParameters;
import org.apache.wicket.examples.WicketExamplePage;
import org.apache.wicket.extensions.ajax.markup.html.form.upload.UploadProgressBar;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.markup.html.form.upload.FileUpload;
import org.apache.wicket.markup.html.form.upload.FileUploadField;
import org.apache.wicket.markup.html.link.Link;
import org.apache.wicket.markup.html.list.ListItem;
import org.apache.wicket.markup.html.list.ListView;
import org.apache.wicket.markup.html.panel.FeedbackPanel;
import org.apache.wicket.model.IModel;
import org.apache.wicket.model.LoadableDetachableModel;
import org.apache.wicket.util.file.Files;
import org.apache.wicket.util.file.Folder;
import org.apache.wicket.util.lang.Bytes;
/**
* Upload example.
*
* @author Eelco Hillenius
*/
public class UploadPage extends WicketExamplePage
{
/**
* List view for files in upload folder.
*/
private class FileListView extends ListView<File>
{
/**
* Construct.
*
* @param name
* Component name
* @param files
* The file list model
*/
public FileListView(String name, final IModel<List<File>> files)
{
super(name, files);
}
/**
* @see ListView#populateItem(ListItem)
*/
@Override
protected void populateItem(ListItem<File> listItem)
{
final File file = listItem.getModelObject();
listItem.add(new Label("file", file.getName()));
listItem.add(new Link("delete")
{
@Override
public void onClick()
{
Files.remove(file);
info("Deleted " + file);
}
});
}
}
/**
* Form for uploads.
*/
private class FileUploadForm extends Form<Void>
{
private FileUploadField fileUploadField;
/**
* Construct.
*
* @param name
* Component name
*/
public FileUploadForm(String name)
{
super(name);
// set this form to multipart mode (allways needed for uploads!)
setMultiPart(true);
// Add one file input field
add(fileUploadField = new FileUploadField("fileInput"));
// Set maximum size to 100K for demo purposes
setMaxSize(Bytes.kilobytes(100));
}
/**
* @see org.apache.wicket.markup.html.form.Form#onSubmit()
*/
@Override
protected void onSubmit()
{
final FileUpload upload = fileUploadField.getFileUpload();
if (upload != null)
{
// Create a new file
File newFile = new File(getUploadFolder(), upload.getClientFileName());
// Check new file, delete if it allready existed
checkFileExists(newFile);
try
{
// Save to new file
newFile.createNewFile();
upload.writeTo(newFile);
UploadPage.this.info("saved file: " + upload.getClientFileName());
}
catch (Exception e)
{
throw new IllegalStateException("Unable to write file");
}
}
}
}
/** Log. */
private static final Log log = LogFactory.getLog(UploadPage.class);
/** Reference to listview for easy access. */
private final FileListView fileListView;
/**
* Constructor.
*
* @param parameters
* Page parameters
*/
public UploadPage(final PageParameters parameters)
{
Folder uploadFolder = getUploadFolder();
// Create feedback panels
final FeedbackPanel uploadFeedback = new FeedbackPanel("uploadFeedback");
// Add uploadFeedback to the page itself
add(uploadFeedback);
// Add simple upload form, which is hooked up to its feedback panel by
// virtue of that panel being nested in the form.
final FileUploadForm simpleUploadForm = new FileUploadForm("simpleUpload");
add(simpleUploadForm);
// Add folder view
add(new Label("dir", uploadFolder.getAbsolutePath()));
fileListView = new FileListView("fileList", new LoadableDetachableModel<List<File>>()
{
@Override
protected List<File> load()
{
return Arrays.asList(getUploadFolder().listFiles());
}
});
add(fileListView);
// Add upload form with ajax progress bar
final FileUploadForm ajaxSimpleUploadForm = new FileUploadForm("ajax-simpleUpload");
ajaxSimpleUploadForm.add(new UploadProgressBar("progress", ajaxSimpleUploadForm));
add(ajaxSimpleUploadForm);
}
/**
* Check whether the file allready exists, and if so, try to delete it.
*
* @param newFile
* the file to check
*/
private void checkFileExists(File newFile)
{
if (newFile.exists())
{
// Try to delete the file
if (!Files.remove(newFile))
{
throw new IllegalStateException("Unable to overwrite " + newFile.getAbsolutePath());
}
}
}
private Folder getUploadFolder()
{
return ((UploadApplication)Application.get()).getUploadFolder();
}
}