Container.Filter (vaadin-server 7.7.45 API)

All Superinterfaces:

Serializable

All Known Implementing Classes:

AbstractJunctionFilter, And, Between, Compare, Compare.Equal, Compare.Greater, Compare.GreaterOrEqual, Compare.Less, Compare.LessOrEqual, IsNull, Like, Not, Or, SimpleStringFilter

Enclosing interface:

Container
```
public static interface Container.Filter
extends Serializable
```
Filter interface for container filtering.
If a filter does not support in-memory filtering, #passesFilter(Item) should throw UnsupportedOperationException.
Lazy containers must be able to map filters to their internal representation (e.g. SQL or JPA 2.0 Criteria).
An UnsupportedFilterException can be thrown by the container if a particular filter is not supported by the container.
An Container.Filter should implement #equals(Object) and #hashCode() correctly to avoid duplicate filter registrations etc.

Since:

6.6

See Also:

Container.Filterable

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`appliesToProperty(Object propertyId)`	Check if a change in the value of a property can affect the filtering result.
`boolean`	`passesFilter(Object itemId, Item item)`	Check if an item passes the filter (in-memory filtering).

- Method Detail
  - passesFilter
```
boolean passesFilter(Object itemId,
                     Item item)
              throws UnsupportedOperationException
```
    Check if an item passes the filter (in-memory filtering).
    
    Parameters:
    
    itemId - identifier of the item being filtered; may be null when the item is being added to the container
    
    item - the item being filtered
    
    Returns:
    
    true if the item is accepted by this filter
    
    Throws:
    
    UnsupportedOperationException - if the filter cannot be used for in-memory filtering
  - appliesToProperty
```
boolean appliesToProperty(Object propertyId)
```
    Check if a change in the value of a property can affect the filtering result. May always return true, at the cost of performance. If the filter cannot determine whether it may depend on the property or not, should return true.
    
    Parameters:
    
    propertyId -
    
    Returns:
    
    true if the filtering result may/does change based on changes to the property identified by propertyId