ContainsDataFlavor (vaadin-server 8.21.0 API)

java.lang.Object
- com.vaadin.event.dd.acceptcriteria.ClientSideCriterion
- - com.vaadin.event.dd.acceptcriteria.ContainsDataFlavor

All Implemented Interfaces:

AcceptCriterion, java.io.Serializable
```
public class ContainsDataFlavor
extends ClientSideCriterion
```
A Criterion that checks whether Transferable contains given data flavor. The developer might for example accept the incoming data only if it contains "Url" or "Text".

Since:

6.3

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor Description

ContainsDataFlavor(java.lang.String dataFlawor)
Constructs a new instance of ContainsDataFlavor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`accept(DragAndDropEvent dragEvent)`	Validates the data in event to be appropriate for the `DropHandler.drop(DragAndDropEvent)` method.
`protected java.lang.String`	`getIdentifier()`
`void`	`paintContent(PaintTarget target)`

Methods inherited from class com.vaadin.event.dd.acceptcriteria.ClientSideCriterion
isClientSideVerifiable, paint, paintResponse

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

- Constructor Detail
  - ContainsDataFlavor
```
public ContainsDataFlavor(java.lang.String dataFlawor)
```
    Constructs a new instance of ContainsDataFlavor.
    
    Parameters:
    
    dataFlawor - the type of data that will be checked from Transferable
- Method Detail
  - paintContent
```
public void paintContent(PaintTarget target)
                  throws PaintException
```
    Overrides:
    
    paintContent in class ClientSideCriterion
    
    Throws:
    
    PaintException
  - accept
```
public boolean accept(DragAndDropEvent dragEvent)
```
    Description copied from interface: AcceptCriterion
    
    Validates the data in event to be appropriate for the DropHandler.drop(DragAndDropEvent) method.
    Note that even if your criterion is validated on client side, you should always validate the data on server side too.
    
    Returns:
  - getIdentifier
```
protected java.lang.String getIdentifier()
```
    Overrides:
    
    getIdentifier in class ClientSideCriterion