Groovy Documentation

## groovy.util
[Java] Enum ObservableList.ChangeType

    java.lang.Object
      groovy.util.ObservableList.ChangeType

    public enum ObservableList.ChangeType

Field Summary
`static java.lang.Object` | `newValue`
`static java.lang.Object` | `oldValue` List decorator that will trigger PropertyChangeEvents when a value changes.

Method Summary
`static ChangeType` | `resolve(int ordinal)`

Methods inherited from class java.lang.Object
java.lang.Object#wait(long), java.lang.Object#wait(long, int), java.lang.Object#wait(), java.lang.Object#equals(java.lang.Object), java.lang.Object#toString(), java.lang.Object#hashCode(), java.lang.Object#getClass(), java.lang.Object#notify(), java.lang.Object#notifyAll()

Field Detail

### newValue

    public static final java.lang.Object newValue

### oldValue

    public static final java.lang.Object oldValue

  List 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 map = new ObservableList( {!(it instanceof Closure)} )
       <p/>
       // skip all properties whose name matches a regex
       def map = new ObservableList( { 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

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

  Bound properties

  - `content` - read-only.
  - `size` - read-only.
  Authors:
    Andres Almiray

Method Detail

### resolve

    public static ChangeType resolve(int ordinal)

Groovy Documentation