Package com.google.gwt.editor.client.adapters

Class ListEditor<T,E extends Editor<? super T>>

java.lang.Object

com.google.gwt.editor.client.adapters.ListEditor<T,E>

Type Parameters:

T - The type of data being managed

E - The type of Editor

All Implemented Interfaces:

CompositeEditor<List<T>,T,E>, Editor<List<T>>, HasEditorDelegate<List<T>>, ValueAwareEditor<List<T>>

Direct Known Subclasses:

HasDataEditor

public class ListEditor<T,E extends Editor<? super T>>
extends Object
implements CompositeEditor<List<T>,T,E>

Manages a list of objects and their associated Editors.

The ListEditor will have no backing list until setValue(List) is called with a non-null value.

Nested Class Summary

Nested classes/interfaces inherited from interface com.google.gwt.editor.client.CompositeEditor

CompositeEditor.EditorChain<C,E extends Editor<? super C>>

Nested classes/interfaces inherited from interface com.google.gwt.editor.client.Editor

Editor.Ignore, Editor.Path

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ListEditor(EditorSource<E> source)	Create a ListEditor backed by an EditorSource.

Method Summary

Modifier and Type	Method	Description
E	createEditorForTraversal()	Creates a temporary sub-Editor to use for traversal.
void	flush()	Indicates that the Editor cycle is finished.
List<E>	getEditors()	Returns an unmodifiable, live view of the Editors managed by the ListEditor.
List<T>	getList()	Returns a live view of the ListEditor's backing data.
String	getPathElement(E subEditor)	Used to implement EditorDelegate.getPath() for the component Editors.
static <T, E extends Editor<? super T>> ListEditor<T,E>	of(EditorSource<E> source)	Create a ListEditor backed by an EditorSource.
void	onPropertyChange(String... paths)	Notifies the Editor that one or more value properties have changed.
void	setDelegate(EditorDelegate<List<T>> delegate)	Called by the EditorDriver to provide access to the EditorDelegate the Editor is peered with.
void	setEditorChain(CompositeEditor.EditorChain<T,E> chain)	Called by the Editor framework to provide the CompositeEditor.EditorChain.
void	setValue(List<T> value)	Sets the ListEditor's backing data.

Methods inherited from class java.lang.Object

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

Constructor Details

ListEditor

protected ListEditor(EditorSource<E> source)

Create a ListEditor backed by an EditorSource.

Parameters:

source - the EditorSource which will create sub-Editors

Method Details

of

public static <T,
E extends Editor<? super T>>
ListEditor<T,E> of(EditorSource<E> source)

Create a ListEditor backed by an EditorSource.

Type Parameters:

T - The type of data being managed

E - The type of Editor

Parameters:

source - the EditorSource which will create sub-Editors

Returns:

a new instance of ListEditor

createEditorForTraversal

public E createEditorForTraversal()

Creates a temporary sub-Editor to use for traversal.

Specified by:

createEditorForTraversal in interface CompositeEditor<List<T>,T,E extends Editor<? super T>>

Returns:

an Editor of type E

flush

public void flush()

Description copied from interface: ValueAwareEditor

Indicates that the Editor cycle is finished. This method will be called in a depth-first order by the EditorDriver, so Editors do not generally need to flush their sub-editors.

Specified by:

flush in interface ValueAwareEditor<T>

getEditors

public List<E> getEditors()

Returns an unmodifiable, live view of the Editors managed by the ListEditor.

The returned list will be live until the next call to setValue(List) and shouldn't be used after that. Editors might (or might not) be reused after a call to setValue(List).

If there is no backing list, an empty list will be returned.

Returns:

a List of Editors of type E

getList

public List<T> getList()

Returns a live view of the ListEditor's backing data.

The structure of the List may be mutated arbitrarily, subject to the limitations of the backing List, but the elements themselves should not be mutated except through getEditors() to avoid data inconsistency.

Returns null if there is no backing list, and edits cannot be made.

 ListEditor<Foo, MyFooEditor> listEditor = ListEditor.of(...);
 listEditor.setValue(listOfFoo); // Usually called by EditorDriver
 listEditor.getList().set(1, new Foo());
 listEditor.getEditors().get(1).getFooFieldEditor().setValue(....);
 

Returns:

a live view of the ListEditor's backing data, or null if there is no backing list.

getPathElement

public String getPathElement(E subEditor)

Description copied from interface: CompositeEditor

Used to implement EditorDelegate.getPath() for the component Editors.

Specified by:

getPathElement in interface CompositeEditor<List<T>,T,E extends Editor<? super T>>

Parameters:

subEditor - an instance of the Editor type previously passed into CompositeEditor.EditorChain.attach(C, E)

Returns:

the path element as a String

onPropertyChange

public void onPropertyChange(String... paths)

Description copied from interface: ValueAwareEditor

Notifies the Editor that one or more value properties have changed. Not all backing services support property-based notifications.

Specified by:

onPropertyChange in interface ValueAwareEditor<T>

Parameters:

paths - a list of String paths

setDelegate

public void setDelegate(EditorDelegate<List<T>> delegate)

Description copied from interface: HasEditorDelegate

Called by the EditorDriver to provide access to the EditorDelegate the Editor is peered with.

Specified by:

setDelegate in interface HasEditorDelegate<T>

Parameters:

delegate - an EditorDelegate of type T

setEditorChain

public void setEditorChain(CompositeEditor.EditorChain<T,E> chain)

Description copied from interface: CompositeEditor

Called by the Editor framework to provide the CompositeEditor.EditorChain.

Specified by:

setEditorChain in interface CompositeEditor<List<T>,T,E extends Editor<? super T>>

Parameters:

chain - an CompositeEditor.EditorChain instance

setValue

public void setValue(List<T> value)

Sets the ListEditor's backing data.

If a null is passed in, the ListEditor will have no backing list and edits cannot be made.

Specified by:

setValue in interface ValueAwareEditor<T>

Parameters:

value - a List of data objects of type T