com.vaadin.server.communication.MetadataWriter API 8.27.7 | Vaadin

com.vaadin.server.communication.

java.lang.Object
- com.vaadin.server.communication.MetadataWriter

All Implemented Interfaces:

Serializable
```
public class MetadataWriter
extends Object
implements Serializable
```
Serializes miscellaneous metadata to JSON.

Since:

7.1

Author:

Vaadin Ltd

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor Description

MetadataWriter()

Method Summary

All Methods
Modifier and Type	Method	Description
`void`	`write(UI ui, Writer writer, boolean repaintAll, boolean async, SystemMessages messages)`	Writes a JSON object containing metadata related to the given UI.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - MetadataWriter
```
public MetadataWriter()
```
- Method Detail
  - write
```
public void write(UI ui,
                  Writer writer,
                  boolean repaintAll,
                  boolean async,
                  SystemMessages messages)
           throws IOException
```
    Writes a JSON object containing metadata related to the given UI.
    
    Parameters:
    
    ui - The UI whose metadata to write.
    
    writer - The writer used.
    
    repaintAll - Whether the client should repaint everything.
    
    async - True if this message is sent by the server asynchronously, false if it is a response to a client message.
    
    messages - a SystemMessages containing client-side error messages.
    
    Throws:
    
    IOException - If the serialization fails.