groovy.util
Class ObservableList

java.lang.Object
  groovy.util.ObservableList

All Implemented Interfaces:

Iterable, Collection, List

public class ObservableList
extends Object
implements List

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 - a element is removed from the list
• ObservableList.ElementUpdatedEvent - a 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.MultiElementRemoveedEvent - triggered by calling list.removeAll()/list.retainAll()

Author:

Andres Almiray

Nested Class Summary

static class	ObservableList.ElementAddedEvent
static class	ObservableList.ElementClearedEvent
static class	ObservableList.ElementEvent
static class	ObservableList.ElementRemovedEvent
static class	ObservableList.ElementUpdatedEvent
static class	ObservableList.MultiElementAddedEvent
static class	ObservableList.MultiElementRemovedEvent

Constructor Summary

ObservableList()

ObservableList(Closure test)

ObservableList(List delegate)

ObservableList(List delegate, Closure test)

Method Summary

void	add(int index, Object element)
boolean	add(Object o)
boolean	addAll(Collection c)
boolean	addAll(int index, Collection c)
void	addPropertyChangeListener(PropertyChangeListener listener)
void	addPropertyChangeListener(String propertyName, PropertyChangeListener listener)
void	clear()
boolean	contains(Object o)
boolean	containsAll(Collection c)
boolean	equals(Object o)
Object	get(int index)
PropertyChangeListener[]	getPropertyChangeListeners()
PropertyChangeListener[]	getPropertyChangeListeners(String propertyName)
int	hashCode()
boolean	hasListeners(String propertyName)
int	indexOf(Object o)
boolean	isEmpty()
Iterator	iterator()
int	lastIndexOf(Object o)
ListIterator	listIterator()
ListIterator	listIterator(int index)
Object	remove(int index)
boolean	remove(Object o)
boolean	removeAll(Collection c)
void	removePropertyChangeListener(PropertyChangeListener listener)
void	removePropertyChangeListener(String propertyName, PropertyChangeListener listener)
boolean	retainAll(Collection c)
Object	set(int index, Object element)
int	size()
List	subList(int fromIndex, int toIndex)
Object[]	toArray()
Object[]	toArray(Object[] a)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ObservableList

public ObservableList()

ObservableList

public ObservableList(List delegate)

ObservableList

public ObservableList(Closure test)

ObservableList

public ObservableList(List delegate,
                      Closure test)

Method Detail

add

public void add(int index,
                Object element)

Specified by:

add in interface List

add

public boolean add(Object o)

Specified by:

add in interface Collection

Specified by:

add in interface List

addAll

public boolean addAll(Collection c)

Specified by:

addAll in interface Collection

Specified by:

addAll in interface List

addAll

public boolean addAll(int index,
                      Collection c)

Specified by:

addAll in interface List

clear

public void clear()

Specified by:

clear in interface Collection

Specified by:

clear in interface List

contains

public boolean contains(Object o)

Specified by:

contains in interface Collection

Specified by:

contains in interface List

containsAll

public boolean containsAll(Collection c)

Specified by:

containsAll in interface Collection

Specified by:

containsAll in interface List

equals

public boolean equals(Object o)

Specified by:

equals in interface Collection

Specified by:

equals in interface List

Overrides:

equals in class Object

get

public Object get(int index)

Specified by:

get in interface List

hashCode

public int hashCode()

Specified by:

hashCode in interface Collection

Specified by:

hashCode in interface List

Overrides:

hashCode in class Object

indexOf

public int indexOf(Object o)

Specified by:

indexOf in interface List

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Collection

Specified by:

isEmpty in interface List

iterator

public Iterator iterator()

Specified by:

iterator in interface Iterable

Specified by:

iterator in interface Collection

Specified by:

iterator in interface List

lastIndexOf

public int lastIndexOf(Object o)

Specified by:

lastIndexOf in interface List

listIterator

public ListIterator listIterator()

Specified by:

listIterator in interface List

listIterator

public ListIterator listIterator(int index)

Specified by:

listIterator in interface List

remove

public Object remove(int index)

Specified by:

remove in interface List

remove

public boolean remove(Object o)

Specified by:

remove in interface Collection

Specified by:

remove in interface List

removeAll

public boolean removeAll(Collection c)

Specified by:

removeAll in interface Collection

Specified by:

removeAll in interface List

retainAll

public boolean retainAll(Collection c)

Specified by:

retainAll in interface Collection

Specified by:

retainAll in interface List

set

public Object set(int index,
                  Object element)

Specified by:

set in interface List

size

public int size()

Specified by:

size in interface Collection

Specified by:

size in interface List

subList

public List subList(int fromIndex,
                    int toIndex)

Specified by:

subList in interface List

toArray

public Object[] toArray()

Specified by:

toArray in interface Collection

Specified by:

toArray in interface List

toArray

public Object[] toArray(Object[] a)

Specified by:

toArray in interface Collection

Specified by:

toArray in interface List

addPropertyChangeListener

public void addPropertyChangeListener(PropertyChangeListener listener)

addPropertyChangeListener

public void addPropertyChangeListener(String propertyName,
                                      PropertyChangeListener listener)

getPropertyChangeListeners

public PropertyChangeListener[] getPropertyChangeListeners()

getPropertyChangeListeners

public PropertyChangeListener[] getPropertyChangeListeners(String propertyName)

removePropertyChangeListener

public void removePropertyChangeListener(PropertyChangeListener listener)

removePropertyChangeListener

public void removePropertyChangeListener(String propertyName,
                                         PropertyChangeListener listener)

hasListeners

public boolean hasListeners(String propertyName)