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/*
@ITMillApache2LicenseForJavaFiles@
*/
package com.vaadin.tests.featurebrowser;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import com.vaadin.terminal.StreamResource;
import com.vaadin.ui.Component;
import com.vaadin.ui.Label;
import com.vaadin.ui.Link;
import com.vaadin.ui.OrderedLayout;
import com.vaadin.ui.Panel;
import com.vaadin.ui.Upload;
import com.vaadin.ui.Upload.FinishedEvent;
public class FeatureUpload extends Feature implements Upload.FinishedListener {
Buffer buffer = new Buffer();
Panel status = new Panel("Uploaded file:");
public FeatureUpload() {
super();
}
@Override
protected Component getDemoComponent() {
final OrderedLayout l = new OrderedLayout();
final Upload up = new Upload("Upload", buffer);
up.setImmediate(true);
up.addListener(this);
status.setVisible(false);
l.addComponent(up);
l.addComponent(status);
// Properties
propertyPanel = new PropertyPanel(up);
setJavadocURL("ui/Upload.html");
return l;
}
@Override
protected String getExampleSrc() {
return "Upload u = new Upload(\"Upload a file:\", uploadReceiver);\n\n"
+ "public class uploadReceiver \n"
+ "implements Upload.receiver, Upload.FinishedListener { \n"
+ "\n" + " java.io.File file;\n"
+ " java.io.FileOutputStream fos;\n"
+ " public uploadReceiver() {\n" + " }";
}
@Override
protected String getDescriptionXHTML() {
return "This demonstrates the use of the Upload component together with the Link component. "
+ "This implementation does not actually store the file to disk, it only keeps it in a buffer. "
+ "The example given on the <em>Code Sample</em>-tab on the other hand stores the file to disk and binds the link to that file.";
}
@Override
protected String getImage() {
return "icon_demo.png";
}
@Override
protected String getTitle() {
return "Upload";
}
public void uploadFinished(FinishedEvent event) {
status.removeAllComponents();
if (buffer.getStream() == null) {
status.addComponent(new Label(
"Upload finished, but output buffer is null!!"));
} else {
status
.addComponent(new Label("<b>Name:</b> "
+ event.getFilename(), Label.CONTENT_XHTML));
status.addComponent(new Label("<b>Mimetype:</b> "
+ event.getMIMEType(), Label.CONTENT_XHTML));
status.addComponent(new Label("<b>Size:</b> " + event.getLength()
+ " bytes.", Label.CONTENT_XHTML));
status.addComponent(new Link("Download " + buffer.getFileName(),
new StreamResource(buffer, buffer.getFileName(),
getApplication())));
status.setVisible(true);
}
}
public class Buffer implements StreamResource.StreamSource, Upload.Receiver {
ByteArrayOutputStream outputBuffer = null;
String mimeType;
String fileName;
public Buffer() {
}
public InputStream getStream() {
if (outputBuffer == null) {
return null;
}
return new ByteArrayInputStream(outputBuffer.toByteArray());
}
/**
* @see com.vaadin.ui.Upload.Receiver#receiveUpload(String,
* String)
*/
public OutputStream receiveUpload(String filename, String MIMEType) {
fileName = filename;
mimeType = MIMEType;
outputBuffer = new ByteArrayOutputStream();
return outputBuffer;
}
/**
* Returns the fileName.
*
* @return String
*/
public String getFileName() {
return fileName;
}
/**
* Returns the mimeType.
*
* @return String
*/
public String getMimeType() {
return mimeType;
}
}
}
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