groovy.util

Class ObservableList

java.lang.Object

groovy.util.ObservableList

All Implemented Interfaces:

java.lang.Iterable, java.util.Collection, java.util.List

public class ObservableList
extends java.lang.Object
implements java.util.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 - 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.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ObservableList.ChangeType
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
protected class	ObservableList.ObservableIterator
protected class	ObservableList.ObservableListIterator

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	CONTENT_PROPERTY
static java.lang.String	SIZE_PROPERTY

Constructor Summary

Constructors

Constructor and Description
ObservableList()
ObservableList(Closure test)
ObservableList(java.util.List delegate)
ObservableList(java.util.List delegate, Closure test)

Method Summary

Methods

Modifier and Type	Method and Description
void	add(int index, java.lang.Object element)
boolean	add(java.lang.Object o)
boolean	addAll(java.util.Collection c)
boolean	addAll(int index, java.util.Collection c)
void	addPropertyChangeListener(java.beans.PropertyChangeListener listener)
void	addPropertyChangeListener(java.lang.String propertyName, java.beans.PropertyChangeListener listener)
void	clear()
boolean	contains(java.lang.Object o)
boolean	containsAll(java.util.Collection c)
boolean	equals(java.lang.Object o)
protected void	fireElementAddedEvent(int index, java.lang.Object element)
protected void	fireElementClearedEvent(java.util.List values)
protected void	fireElementEvent(ObservableList.ElementEvent event)
protected void	fireElementRemovedEvent(int index, java.lang.Object element)
protected void	fireElementUpdatedEvent(int index, java.lang.Object oldValue, java.lang.Object newValue)
protected void	fireMultiElementAddedEvent(int index, java.util.List values)
protected void	fireMultiElementRemovedEvent(java.util.List values)
protected void	fireSizeChangedEvent(int oldValue, int newValue)
java.lang.Object	get(int index)
java.util.List	getContent()
protected java.util.List	getDelegateList()
java.beans.PropertyChangeListener[]	getPropertyChangeListeners()
java.beans.PropertyChangeListener[]	getPropertyChangeListeners(java.lang.String propertyName)
int	getSize()
protected Closure	getTest()
int	hashCode()
boolean	hasListeners(java.lang.String propertyName)
int	indexOf(java.lang.Object o)
boolean	isEmpty()
java.util.Iterator	iterator()
int	lastIndexOf(java.lang.Object o)
java.util.ListIterator	listIterator()
java.util.ListIterator	listIterator(int index)
java.lang.Object	remove(int index)
boolean	remove(java.lang.Object o)
boolean	removeAll(java.util.Collection c)
void	removePropertyChangeListener(java.beans.PropertyChangeListener listener)
void	removePropertyChangeListener(java.lang.String propertyName, java.beans.PropertyChangeListener listener)
boolean	retainAll(java.util.Collection c)
java.lang.Object	set(int index, java.lang.Object element)
int	size()
java.util.List	subList(int fromIndex, int toIndex)
java.lang.Object[]	toArray()
java.lang.Object[]	toArray(java.lang.Object[] a)

Methods inherited from class java.lang.Object

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

Field Detail

SIZE_PROPERTY

public static final java.lang.String SIZE_PROPERTY

See Also:

Constant Field Values

CONTENT_PROPERTY

public static final java.lang.String CONTENT_PROPERTY

See Also:

Constant Field Values

Constructor Detail

ObservableList

public ObservableList()

ObservableList

public ObservableList(java.util.List delegate)

ObservableList

public ObservableList(Closure test)

ObservableList

public ObservableList(java.util.List delegate,
              Closure test)

Method Detail

getContent

public java.util.List getContent()

getDelegateList

protected java.util.List getDelegateList()

getTest

protected Closure getTest()

fireElementAddedEvent

protected void fireElementAddedEvent(int index,
                         java.lang.Object element)

fireMultiElementAddedEvent

protected void fireMultiElementAddedEvent(int index,
                              java.util.List values)

fireElementClearedEvent

protected void fireElementClearedEvent(java.util.List values)

fireElementRemovedEvent

protected void fireElementRemovedEvent(int index,
                           java.lang.Object element)

fireMultiElementRemovedEvent

protected void fireMultiElementRemovedEvent(java.util.List values)

fireElementUpdatedEvent

protected void fireElementUpdatedEvent(int index,
                           java.lang.Object oldValue,
                           java.lang.Object newValue)

fireElementEvent

protected void fireElementEvent(ObservableList.ElementEvent event)

fireSizeChangedEvent

protected void fireSizeChangedEvent(int oldValue,
                        int newValue)

add

public void add(int index,
       java.lang.Object element)

Specified by:

add in interface java.util.List

add

public boolean add(java.lang.Object o)

Specified by:

add in interface java.util.Collection

Specified by:

add in interface java.util.List

addAll

public boolean addAll(java.util.Collection c)

Specified by:

addAll in interface java.util.Collection

Specified by:

addAll in interface java.util.List

addAll

public boolean addAll(int index,
             java.util.Collection c)

Specified by:

addAll in interface java.util.List

clear

public void clear()

Specified by:

clear in interface java.util.Collection

Specified by:

clear in interface java.util.List

contains

public boolean contains(java.lang.Object o)

Specified by:

contains in interface java.util.Collection

Specified by:

contains in interface java.util.List

containsAll

public boolean containsAll(java.util.Collection c)

Specified by:

containsAll in interface java.util.Collection

Specified by:

containsAll in interface java.util.List

equals

public boolean equals(java.lang.Object o)

Specified by:

equals in interface java.util.Collection

Specified by:

equals in interface java.util.List

Overrides:

equals in class java.lang.Object

get

public java.lang.Object get(int index)

Specified by:

get in interface java.util.List

hashCode

public int hashCode()

Specified by:

hashCode in interface java.util.Collection

Specified by:

hashCode in interface java.util.List

Overrides:

hashCode in class java.lang.Object

indexOf

public int indexOf(java.lang.Object o)

Specified by:

indexOf in interface java.util.List

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Collection

Specified by:

isEmpty in interface java.util.List

iterator

public java.util.Iterator iterator()

Specified by:

iterator in interface java.lang.Iterable

Specified by:

iterator in interface java.util.Collection

Specified by:

iterator in interface java.util.List

lastIndexOf

public int lastIndexOf(java.lang.Object o)

Specified by:

lastIndexOf in interface java.util.List

listIterator

public java.util.ListIterator listIterator()

Specified by:

listIterator in interface java.util.List

listIterator

public java.util.ListIterator listIterator(int index)

Specified by:

listIterator in interface java.util.List

remove

public java.lang.Object remove(int index)

Specified by:

remove in interface java.util.List

remove

public boolean remove(java.lang.Object o)

Specified by:

remove in interface java.util.Collection

Specified by:

remove in interface java.util.List

removeAll

public boolean removeAll(java.util.Collection c)

Specified by:

removeAll in interface java.util.Collection

Specified by:

removeAll in interface java.util.List

retainAll

public boolean retainAll(java.util.Collection c)

Specified by:

retainAll in interface java.util.Collection

Specified by:

retainAll in interface java.util.List

set

public java.lang.Object set(int index,
                   java.lang.Object element)

Specified by:

set in interface java.util.List

size

public int size()

Specified by:

size in interface java.util.Collection

Specified by:

size in interface java.util.List

getSize

public int getSize()

subList

public java.util.List subList(int fromIndex,
                     int toIndex)

Specified by:

subList in interface java.util.List

toArray

public java.lang.Object[] toArray()

Specified by:

toArray in interface java.util.Collection

Specified by:

toArray in interface java.util.List

toArray

public java.lang.Object[] toArray(java.lang.Object[] a)

Specified by:

toArray in interface java.util.Collection

Specified by:

toArray in interface java.util.List

addPropertyChangeListener

public void addPropertyChangeListener(java.beans.PropertyChangeListener listener)

addPropertyChangeListener

public void addPropertyChangeListener(java.lang.String propertyName,
                             java.beans.PropertyChangeListener listener)

getPropertyChangeListeners

public java.beans.PropertyChangeListener[] getPropertyChangeListeners()

getPropertyChangeListeners

public java.beans.PropertyChangeListener[] getPropertyChangeListeners(java.lang.String propertyName)

removePropertyChangeListener

public void removePropertyChangeListener(java.beans.PropertyChangeListener listener)

removePropertyChangeListener

public void removePropertyChangeListener(java.lang.String propertyName,
                                java.beans.PropertyChangeListener listener)

hasListeners

public boolean hasListeners(java.lang.String propertyName)