com.vaadin.event.dd.acceptcriteria.

java.lang.Object
- com.vaadin.event.dd.acceptcriteria.ServerSideCriterion

All Implemented Interfaces:

AcceptCriterion, Serializable
```
public abstract class ServerSideCriterion
extends Object
implements AcceptCriterion
```
Parent class for criteria which are verified on the server side during a drag operation to accept/discard dragged content (presented by Transferable).
Subclasses should implement the AcceptCriterion.accept(com.vaadin.event.dd.DragAndDropEvent) method.
As all server side state can be used to make a decision, this is more flexible than ClientSideCriterion. However, this does require additional requests from the browser to the server during a drag operation.

Since:

6.3

See Also:

AcceptCriterion, ClientSideCriterion, Serialized Form

Constructor Summary

Constructors
Constructor Description

ServerSideCriterion()

Method Summary

All Methods
Modifier and Type	Method	Description
`protected String`	`getIdentifier()`
`boolean`	`isClientSideVerifiable()`	Returns whether the criteria can be checked on the client or whether a server request is needed to check the criteria.
`void`	`paint(PaintTarget target)`
`void`	`paintContent(PaintTarget target)`
`void`	`paintResponse(PaintTarget target)`	This needs to be implemented if and only if a criterion does some lazy server side initialization.

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

Methods inherited from interface com.vaadin.event.dd.acceptcriteria.AcceptCriterion
accept

- Constructor Detail
  - ServerSideCriterion
```
public ServerSideCriterion()
```
- Method Detail
  - isClientSideVerifiable
```
public final boolean isClientSideVerifiable()
```
    Description copied from interface: AcceptCriterion
    
    Returns whether the criteria can be checked on the client or whether a server request is needed to check the criteria. This requirement may depend on the state of the criterion (e.g. logical operations between criteria), so this cannot be based on a marker interface.
    
    Specified by:
    
    isClientSideVerifiable in interface AcceptCriterion
  - paint
```
public void paint(PaintTarget target)
           throws PaintException
```
    Specified by:
    
    paint in interface AcceptCriterion
    
    Throws:
    
    PaintException
  - paintContent
```
public void paintContent(PaintTarget target)
```
  - paintResponse
```
public void paintResponse(PaintTarget target)
                   throws PaintException
```
    Description copied from interface: AcceptCriterion
    
    This needs to be implemented if and only if a criterion does some lazy server side initialization. The UIDL painted in this method will be passed to client side drop handler implementation. Implementation can assume that AcceptCriterion.accept(DragAndDropEvent) is called before this method.
    
    Specified by:
    
    paintResponse in interface AcceptCriterion
    
    Throws:
    
    PaintException
  - getIdentifier
```
protected String getIdentifier()
```

com.vaadin.event.dd.acceptcriteria.

Class ServerSideCriterion

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface com.vaadin.event.dd.acceptcriteria.AcceptCriterion

Constructor Detail

ServerSideCriterion

Method Detail

isClientSideVerifiable

paint

paintContent

paintResponse

getIdentifier