groovy.util
[Java] Enum ObservableSet.ChangeType

java.lang.Object
  groovy.util.ObservableSet.ChangeType

public enum ObservableSet.ChangeType

newValue

public static final java.lang.Object newValue

oldValue

public static final java.lang.Object oldValue

Set decorator that will trigger PropertyChangeEvents when a value changes.
An optional Closure may be specified and will work as a filter, if it returns true the property will trigger an event (if the value indeed changed), otherwise it won't. The Closure may receive 1 or 2 parameters, the single one being the value, the other one both the key and value, for example:

 // skip all properties whose value is a closure
 def set = new ObservableSet( {!(it instanceof Closure)} )
 <p/>
 // skip all properties whose name matches a regex
 def set = new ObservableSet( { name, value -> !(name =˜ /[A-Z+]/) } )
 

The current implementation will trigger specialized events in the following scenarios, you need not register a different listener as those events extend from PropertyChangeEvent

• ObservableSet.ElementAddedEvent - a new element is added to the set
• ObservableSet.ElementRemovedEvent - an element is removed from the set
• ObservableSet.ElementUpdatedEvent - an element changes value (same as regular PropertyChangeEvent)
• ObservableSet.ElementClearedEvent - all elements have been removed from the list
• ObservableSet.MultiElementAddedEvent - triggered by calling set.addAll()
• ObservableSet.MultiElementRemovedEvent - triggered by calling set.removeAll()/set.retainAll()

Bound properties

• content - read-only.
• size - read-only.

Authors:

Andres Almiray

Groovy Documentation