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package com.vaadin.tests.components.ui;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.PrintWriter;
import java.io.Serializable;
import java.io.StringWriter;
import java.util.Date;
import com.vaadin.server.VaadinRequest;
import com.vaadin.shared.ui.ContentMode;
import com.vaadin.tests.components.AbstractReindeerTestUI;
import com.vaadin.tests.util.Log;
import com.vaadin.ui.Button;
import com.vaadin.ui.Label;
public class UISerialization extends AbstractReindeerTestUI {
private Log log = new Log(5);
@Override
protected void setup(VaadinRequest request) {
addComponent(log);
addComponent(new Button("Serialize UI", event -> {
Date d = new Date();
try {
byte[] result = serialize(UISerialization.this);
long elapsed = new Date().getTime() - d.getTime();
log.log("Serialized UI in " + elapsed + "ms into "
+ result.length + " bytes");
Object diffStateBefore = getConnectorTracker()
.getDiffState(UISerialization.this);
UISerialization app = (UISerialization) deserialize(result);
log.log("Deserialized UI in " + elapsed + "ms");
Object diffStateAfter = getConnectorTracker()
.getDiffState(UISerialization.this);
if (diffStateBefore.equals(diffStateAfter)) {
log.log("Diff states match, size: "
+ diffStateBefore.toString().length());
} else {
log.log("Diff states do not match");
}
} catch (Exception e) {
log.log("Exception caught: " + e.getMessage());
StringWriter sw = new StringWriter();
e.printStackTrace(new PrintWriter(sw));
addComponent(
new Label(sw.toString(), ContentMode.PREFORMATTED));
}
}));
}
protected void serializeInstance(Class<?> cls)
throws InstantiationException, IllegalAccessException, IOException {
serialize((Serializable) cls.newInstance());
}
protected byte[] serialize(Serializable serializable) throws IOException {
ByteArrayOutputStream os = new ByteArrayOutputStream();
ObjectOutputStream oos;
oos = new ObjectOutputStream(os);
oos.writeObject(serializable);
return os.toByteArray();
}
protected Object deserialize(byte[] result) {
ByteArrayInputStream is = new ByteArrayInputStream(result);
ObjectInputStream ois;
try {
ois = new ObjectInputStream(is);
return ois.readObject();
} catch (Exception e) {
throw new RuntimeException("Deserialization failed", e);
}
}
@Override
protected String getTestDescription() {
// TODO Auto-generated method stub
return null;
}
@Override
protected Integer getTicketNumber() {
// TODO Auto-generated method stub
return null;
}
}
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