I am trying to recreate the Byline component activity in AEM WKND (https://experienceleague.adobe.com/docs/experience-manager-learn/getting-started-wknd-tutorial-develop/project-archetype/custom-component.html?lang=en#byline-styles). However when I tried to implement the html file, byline component is hidden in the page whenever I call data-sly-use api. Is there any workaround or solution for this one?
Below is my impl code:
#Model(adaptables = {SlingHttpServletRequest.class},
adapters = {Byline.class},
resourceType = {BylineImpl.RESOURCE_TYPE},
defaultInjectionStrategy = DefaultInjectionStrategy.OPTIONAL)
public class BylineImpl implements Byline {
protected static final String RESOURCE_TYPE = "wknd/components/byline";
#Self
private SlingHttpServletRequest request;
#OSGiService
private ModelFactory modelFactory;
#ValueMapValue
private String name;
#ValueMapValue
private List<String> occupations;
private Image image;
#Override
public String getName() {
return name;
}
#PostConstruct
private void init(){
image = modelFactory.getModelFromWrappedRequest(request, request.getResource(), Image.class);
}
#Override
public List<String> getOccupations() {
if (occupations != null) {
Collections.sort(occupations);
return new ArrayList<String>(occupations);
} else {
return Collections.emptyList();
}
}
#Override
public boolean isEmpty() {
final Image componentImage = getImage();
if (StringUtils.isBlank(name)) {
// Name is missing, but required
return true;
} else if (occupations == null || occupations.isEmpty()) {
// At least one occupation is required
return true;
} else if (componentImage == null || StringUtils.isBlank(componentImage.getSrc())) {
// A valid image is required
return true;
} else {
// Everything is populated, so this component is not considered empty
return false;
}
}
private Image getImage() {
return image;
}
}
Below is my byline.html code:
div data-sly-use.byline="com.adobe.aem.guides.wknd.core.models.impl.BylineImpl"
data-sly-use.placeholderTemplate="core/wcm/components/commons/v1/templates.html"
data-sly-test.hasContent="${!byline.empty}" class="cmp-byline">
<div class="cmp-byline__image" data-sly-resource="${ '.' # resourceType = 'core/wcm/components/image/v2/image' }">
</div>
<h2 class="cmp-byline__name">${byline.name}</h2>
<p class="cmp-byline__occupations">${byline.occupations # join=', '}</p>
</div>
<sly data-sly-call="${placeholderTemplate.placeholder # isEmpty=!hasContent}"></sly>
Related
I have a generic Javafx Listbox with checkable items (up to 20 items).
When I (de-)select an item, a property change is released to update other parts of the program.
It works all fine so far.
But I have additionally 2 buttons to (de-)select all items at once.
Also this working as expected, but I get an event for each item, which means that up to 20 property change events are fired, when one would be enough.
It is not a performance problem, not much is done on the events, but it is bad style.
Can anybody suggest a better solution?
public class FilterBox extends AnchorPane {
ListView<Item> listFilter;
Button buttonAll;
Button buttonNone;
public FilterBox() {
init();
place();
action();
getChildren().addAll(listFilter, buttonAll, buttonNone);
handleChange();
}
private void init() {
listFilter = new ListView<>();
buttonAll = new Button("All");
buttonNone = new Button("None");
}
private void place() {
setTopAnchor(listFilter, 0d);
setBottomAnchor(listFilter, 40d);
setLeftAnchor(listFilter, 0d);
setRightAnchor(listFilter, 0d);
setBottomAnchor(buttonAll, 5d);
setLeftAnchor(buttonAll, 0d);
buttonAll.setPrefWidth(75d);
setBottomAnchor(buttonNone, 5d);
setRightAnchor(buttonNone, 0d);
buttonNone.setPrefWidth(75d);
}
private void action() {
listFilter.setCellFactory(CheckBoxListCell.forListView((Item item) -> item.selectedProperty()));
buttonAll.setOnAction((t) -> {
changeAll(true);
});
buttonNone.setOnAction((t) -> {
changeAll(false);
});
}
private void changeAll(Boolean state) {
for (Item i : listFilter.getItems()) {
i.setSelected(state);
}
}
private void setListener(Item item) {
item.selectedProperty().addListener((o, ov, nv) -> {
Trigger.setNewFilterEvent();
});
}
private void handleChange() {
HashSet<String> list = InputData.getSportList();
for (String s : list) {
Item item = new Item(s, true);
listFilter.getItems().add(item);
setListener(item);
}
}
public static class Item {
private final StringProperty name = new SimpleStringProperty();
private final BooleanProperty selected = new SimpleBooleanProperty();
public Item(String name, boolean on) {
setName(name);
setSelected(on);
}
public final StringProperty nameProperty() {
return this.name;
}
public final String getName() {
return this.nameProperty().get();
}
public final void setName(final String name) {
this.nameProperty().set(name);
}
public final BooleanProperty selectedProperty() {
return this.selected;
}
public final boolean isSelected() {
return this.selectedProperty().get();
}
public final void setSelected(final boolean sel) {
this.selectedProperty().set(sel);
}
#Override
public String toString() {
return getName();
}
}
}
Assuming Trigger.setNewFilterEvent() is what you want called only once when the "select all" or the "deselect all" actions are fired, then you can use a boolean flag for this.
public class FilterBox {
private boolean ignoreIndividualChanges;
// other fields omitted for brevity
private void changeAll(boolean state) {
ignoreIndividualChanges = true;
try {
for (Item i : listFilter.getItems()) {
i.setSelected(state);
}
Trigger.setNewFilterEvent(); // fire one event
} finally {
ignoreIndividualChanges = false;
}
}
private void setListener(Item item) {
item.selectedProperty().addListener((obs, ov, nv) -> {
if (!ignoreIndividualChanges) {
Trigger.fireNewFilterEvent();
}
});
}
// other methods omitted for brevity
}
Also, note I changed the parameter type for changeAll from Boolean to boolean. There's no reason to use the reference type here, so you should stick with the primitive type.
I'm having trouble with the coding to properly listen for Firebase add or update events. My attempt below has the data loading into the Syncfusion Datagrid, but there is a weird glitch where when I click the mouse on the Datagrid and pull-down, the first record in my 4 record set gets added to the bottom of the Datagrid, showing a 5th record... if I update an element in the Datagrid, the change is not reflected in Firebase. If I add or change a value in firebase, it does not update in Datagrid. Any help to steer me in the right direction to get this to work would be appreciated. Here's the code:
the VisualStudio 2019
CookPage.xaml
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:d="http://xamarin.com/schemas/2014/forms/design"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:Chart_sample"
xmlns:gauge="clr-namespace:Syncfusion.SfGauge.XForms;assembly=Syncfusion.SfGauge.XForms"
xmlns:Syncfusion="clr-namespace:Syncfusion.SfDataGrid.XForms;assembly=Syncfusion.SfDataGrid.XForms"
mc:Ignorable="d"
x:Class="Chart_sample.Views.CookPage">
<StackLayout>
<Syncfusion:SfDataGrid x:Name="sfGrid">
</Syncfusion:SfDataGrid>
</StackLayout>
</ContentPage>
CookPage.xaml.cs
using Chart_sample.Services;
using Syncfusion.SfDataGrid.XForms;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;
namespace Chart_sample.Views
{
[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class CookPage : ContentPage
{
FirebaseHelper firebaseHelper = new FirebaseHelper();
public CookPage()
{
InitializeComponent();
// for Syncfusion DataGrid
firebaseHelper.listenForEvents();
sfGrid.ItemsSource = ViewProgramModel._returnedEvents;
sfGrid.ColumnSizer = ColumnSizer.Star;
sfGrid.AllowEditing = true;
sfGrid.NavigationMode = NavigationMode.Cell;
sfGrid.SelectionMode = Syncfusion.SfDataGrid.XForms.SelectionMode.Single;
}
}
}
FirebaseHelper.cs
using Firebase.Database;
using Firebase.Database.Query;
using System;
using System.Linq;
namespace Chart_sample.Services
{
public class FirebaseHelper
{
internal ViewProgramModel ViewProgramModel { get; set; }
FirebaseClient firebase = new FirebaseClient("https://pelletpirate.firebaseio.com/");
private readonly string ChildProgram = "ControllerData/Pellet_Pirate_1/Program";
public static IDisposable returnedEvents;
public async void listenForEvents()
{
ViewProgramModel._returnedEvents.Clear();
var programs = await firebase.Child(ChildProgram).OnceAsync<ViewProgramModel>();
for (int i = 0; i < programs.Count; i++)
{
ViewProgramModel._returnedEvents.Add(programs.ElementAt(i).Object);
}
returnedEvents = firebase.Child(ChildProgram).OrderByKey().AsObservable<ViewProgramModel>()
.Subscribe(eventReceived =>
{
if (eventReceived.EventType == Firebase.Database.Streaming.FirebaseEventType.InsertOrUpdate)
{
var found = ViewProgramModel._returnedEvents.FirstOrDefault(i => i._KEY == eventReceived.Key);
if (found == null)
{
// not in observable collection, add it
ViewProgramModel._returnedEvents.Add(eventReceived.Object);
}
else
{
// event was updated
int tempIndex = ViewProgramModel._returnedEvents.IndexOf(found);
ViewProgramModel._returnedEvents[tempIndex] = eventReceived.Object;
}
}
});
}
}
}
ViewProgrammodel.cs
using System.Collections.ObjectModel;
using System.ComponentModel;
namespace Chart_sample
{
public class ViewProgramModel : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
private string _KEy;
private string MOde;
private int TArget;
private string TRigger;
private int TRiggerVAlue;
public string _KEY
{
get { return _KEy; }
set
{
this._KEy = value;
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("_KEY"));
}
}
public string MODE
{
get { return MOde; }
set
{
this.MOde = value;
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("MODE"));
}
}
public int TARGET
{
get { return TArget; }
set
{
this.TArget = value;
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("TARGET"));
}
}
public string TRIGGER
{
get { return TRigger; }
set
{
this.TRigger = value;
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("TRIGGER"));
}
}
public int TRIGGERVALUE
{
get { return TRiggerVAlue; }
set
{
this.TRiggerVAlue = value;
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("TRIGGERVALUE"));
}
}
public static ObservableCollection<ViewProgramModel> _returnedEvents = new ObservableCollection<ViewProgramModel>();
}
}
I edit your demo, I achieve the update, Add, delete function.
Here is running GIF.
I change your ViewProgramModel like following code. Just move the _returnedEvents to the FirebaseHelper.cs
namespace Chart_sample
{
public class ViewProgramModel : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
private string _KEy;
private string MOde;
private int TArget;
private string TRigger;
private int TRiggerVAlue;
public string _KEY
{
get { return _KEy; }
set
{
this._KEy = value;
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("_KEY"));
}
}
public string MODE
{
get { return MOde; }
set
{
this.MOde = value;
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("MODE"));
}
}
public int TARGET
{
get { return TArget; }
set
{
this.TArget = value;
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("TARGET"));
}
}
public string TRIGGER
{
get { return TRigger; }
set
{
this.TRigger = value;
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("TRIGGER"));
}
}
public int TRIGGERVALUE
{
get { return TRiggerVAlue; }
set
{
this.TRiggerVAlue = value;
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("TRIGGERVALUE"));
}
}
}
Here is FirebaseHelper.cs, Note: I achieve the update function just for the TARGET Column, I suggest your to add a Primary-key(Auto-increase) for every record in your database to achieve your search function.
public class FirebaseHelper
{
public ObservableCollection<ViewProgramModel> _returnedEvents { get; set; }
public FirebaseHelper()
{
_returnedEvents = new ObservableCollection<ViewProgramModel>();
}
// internal ViewProgramModel MyViewProgramModel { get; set; }
FirebaseClient firebase = new FirebaseClient("https://xxxxxxxxxx.firebaseio.com/");
private readonly string ChildProgram = "ControllerData/xxxxxx_Pirate_1/Program";
public static IDisposable returnedEvents;
public async Task AddViewProgramModel()
{
//new ViewProgramModel() { MODE="test", TARGET=122, TRIGGER="122", TRIGGERVALUE=333, }
await firebase
.Child(ChildProgram)
.PostAsync( new ViewProgramModel() { MODE = "test", TARGET = 122, TRIGGER = "122", TRIGGERVALUE = 333, });
GetAllData();
}
public async Task UpdateViewProgramModel(ViewProgramModel viewProgramModel , string oldValue)
{
var toUpdatePerson = (await firebase
.Child(ChildProgram)
.OnceAsync<ViewProgramModel>()).FirstOrDefault(a => a.Object.TARGET == Convert.ToInt32( oldValue));
await firebase
.Child(ChildProgram)
.Child(toUpdatePerson.Key)
.PutAsync(viewProgramModel);
GetAllData();
}
public async Task DeleteViewProgramModel(string mode)
{
var toDeletePerson = (await firebase
.Child(ChildProgram)
.OnceAsync<ViewProgramModel>()).FirstOrDefault(a => a.Object.MODE == mode);
await firebase.Child(ChildProgram).Child(toDeletePerson.Key).DeleteAsync();
GetAllData();
}
public async void GetAllData()
{
_returnedEvents.Clear();
var programs = await firebase.Child(ChildProgram).OnceAsync<ViewProgramModel>();
for (int i = 0; i < programs.Count; i++)
{
_returnedEvents.Add(programs.ElementAt(i).Object);
}
}
public async void listenForEvents()
{
_returnedEvents.Clear();
var programs = await firebase.Child(ChildProgram).OnceAsync<ViewProgramModel>();
for (int i = 0; i < programs.Count; i++)
{
_returnedEvents.Add(programs.ElementAt(i).Object);
}
//returnedEvents = firebase.Child(ChildProgram).OrderByKey().AsObservable<ViewProgramModel>()
// .Subscribe(eventReceived =>
// {
// if (eventReceived.EventType == Firebase.Database.Streaming.FirebaseEventType.InsertOrUpdate)
// {
// var found = _returnedEvents.FirstOrDefault(i => i._KEY == eventReceived.Key);
// if (found == null)
// {
// // not in observable collection, add it
// _returnedEvents.Add(eventReceived.Object);
// }
// else
// {
// // event was updated
// int tempIndex = _returnedEvents.IndexOf(found);
// _returnedEvents[tempIndex] = eventReceived.Object;
// }
// }
//});
}
}
}
Here is CookPage.xaml
<StackLayout>
<Button Text="add" Clicked="Button_Clicked"></Button>
<Button Text="delete" Clicked="Button_Clicked_1"></Button>
<Syncfusion:SfDataGrid x:Name="sfGrid" ItemsSource="{Binding _returnedEvents, Mode=TwoWay} " >
</Syncfusion:SfDataGrid>
</StackLayout>
Here is code about CookPage.cs.
[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class CookPage : ContentPage
{
FirebaseHelper firebaseHelper = new FirebaseHelper();
public CookPage()
{
InitializeComponent();
// for Syncfusion DataGrid
firebaseHelper.listenForEvents();
//sfGrid.ItemsSource = ViewProgramModel._returnedEvents;
BindingContext= firebaseHelper;
sfGrid.ColumnSizer = ColumnSizer.Star;
sfGrid.AllowEditing = true;
sfGrid.NavigationMode = NavigationMode.Cell;
sfGrid.AllowLoadMore = true;
sfGrid.AutoGenerateColumns = true;
//sfGrid.AutoGenerateColumnsMode= AutoGenerateColumnsMode.
sfGrid.SelectionMode = Syncfusion.SfDataGrid.XForms.SelectionMode.Single;
sfGrid.AllowPullToRefresh = true;
sfGrid.CurrentCellEndEdit += SfGrid_CurrentCellEndEdit; ;
}
private async void SfGrid_CurrentCellEndEdit(object sender, GridCurrentCellEndEditEventArgs e)
{
//throw new System.NotImplementedException();
var selectObj = sender as SfDataGrid;
RowColumnIndex index = e.RowColumnIndex;
int selectColumnIndex = index.ColumnIndex; //2
int selectRowIndex = index.RowIndex; //3
var ob=firebaseHelper._returnedEvents;
ViewProgramModel selectObject =ob[selectRowIndex-1];
var newVale = e.NewValue.ToString();
var oldeValue = e.OldValue.ToString();
//Here just judge TARGET Column, you should judge all Columns
if (selectColumnIndex == 2)
{
selectObject.TARGET = Convert.ToInt32(newVale);
}
//If you want to achieve the all Grid change function, you should judge the selectRowIndex for every change
//if (selectRowIndex==1)
//{
// selectObject.MODE = newVale;
//}else if (selectRowIndex==2)
//{
// selectObject.TARGET = Convert.ToInt32( newVale);
//}else if (selectRowIndex == 3)
//{
// selectObject.TRIGGER = newVale;
//}else if (selectRowIndex == 4)
//{
// selectObject.TRIGGERVALUE = Convert.ToInt32(newVale);
//}
await firebaseHelper.UpdateViewProgramModel(selectObject, oldeValue);
}
private async void Button_Clicked(object sender, System.EventArgs e)
{
await firebaseHelper.AddViewProgramModel();
}
private async void Button_Clicked_1(object sender, System.EventArgs e)
{
await firebaseHelper.DeleteViewProgramModel("test");
}
}
In a JavaFX TreeView I'm using 'custom' classes which extend TreeItem. This makes me able to edit the items in the TreeView (I can double click them and edit the contents when running the application) but I can't seem to be able to set the .setOnEditCommit() method properly. I was hoping it'd work similar as the function in a tableview but I didn't have any luck yet.
This is my code in my controller in which I try to set the setOnEditCommit() method. In my TreeView called 'trvDivisies' I display football team divisions / competitions and one level lower I display all the teams that are in a certain division.
private void setUpTreeView() {
trvDivisies.setEditable(true);
trvDivisies.setShowRoot(false);
TreeItem<String> root = new TreeItem<>();
for (Divisie d : divisies) {
TreeItem<String> divisieTreeItem = d;
divisieTreeItem.valueProperty().set(d.getNaam());
for (VoetbalTeam vt : d.getVoetbalTeams()) {
TreeItem<String> voetbalTeamTreeItem = vt;
voetbalTeamTreeItem.valueProperty().setValue(vt.getTeamNaam());
divisieTreeItem.getChildren().add(voetbalTeamTreeItem);
}
root.getChildren().add(divisieTreeItem);
}
trvDivisies.setRoot(root);
trvDivisies.getSelectionModel().selectedItemProperty().addListener(new ChangeListener() {
#Override
public void changed(ObservableValue observable, Object oldValue, Object newValue) {
System.out.println(newValue);
}
});
trvDivisies.setCellFactory(TextFieldTreeCell.forTreeView());
// I get an error at the following line when compiling
trvDivisies.setOnEditCommit((TreeView.EditEvent p) -> {
TreeItem<String> selectedItem = p.getTreeItem();
if (selectedItem instanceof Divisie) {
updateDivisie((Divisie)selectedItem);
} else if (selectedItem instanceof VoetbalTeam) {
updateTeam((VoetbalTeam)selectedItem);
}
});
}
This is what my 'custom' classes look like.
public class Divisie extends TreeItem<String> {
private static int idCount = 0;
private int id;
private String naam;
private List<VoetbalTeam> voetbalTeams;
public int getId() {
return id;
}
public String getNaam() {
return naam;
}
public List<VoetbalTeam> getVoetbalTeams() {
return voetbalTeams;
}
public Divisie(int id, String naam) {
super(naam);
this.id = id;
this.naam = naam;
}
public Divisie(String naam) {
this.id = ++idCount;
this.naam = naam;
}
public void addTeam(VoetbalTeam toBeAdded) {
if (voetbalTeams == null) {
voetbalTeams = new LinkedList<>();
}
voetbalTeams.add(toBeAdded);
}
#Override
public String toString() {
return this.naam;
}
}
Second 'lower level' class
public class VoetbalTeam extends TreeItem<String> {
private static int idCount = 0;
private int id;
private String teamNaam;
private List<Speler> spelers;
public int getId() {
return id;
}
public String getTeamNaam() {
return teamNaam;
}
public List<Speler> getSpelers() {
return this.spelers;
}
public VoetbalTeam(int id, String teamNaam) {
super(teamNaam);
this.id = id;
this.teamNaam = teamNaam;
}
public VoetbalTeam(String teamNaam) {
super(teamNaam);
this.id = ++idCount;
this.teamNaam = teamNaam;
}
public void addSpeler(Speler nieuweSpeler) {
if (spelers == null) {
spelers = new LinkedList<>();
}
this.spelers.add(nieuweSpeler);
}
#Override
public String toString() {
return this.teamNaam;
}
}
When trying to run the application WITH the .setOnEditCommit() method I get an error saying:
Error:(97, 37) java: incompatible types: incompatible parameter types in lambda expression
I was hoping you guys can tell me what I need to change my TreeView.EditEvent lambda to or help me find an easier solution.
For a TreeView<T>, the signature of setOnEditCommit is
void setOnEditCommit(EventHandler<TreeView.EditEvent<T>> value)
Since you have (apparently) a TreeView<String>, you need
trvDivisies.setOnEditCommit((TreeView.EditEvent<String> p) -> {
// ...
});
Or, of course, you can just let the compiler do the work for you:
trvDivisies.setOnEditCommit(p -> {
// ...
});
I have a CursorLoader that observes a directory with this URI:
uriDirectory = content://com.myapp.stocks/stocks
and another CursorLoader that observes an item with this URI:
uriItem = content://com.myapp.stocks/stocks/GOOG
When I update uriItem and call getContext().getContentResolver().notifyChange(uriItem , null); in my ContentProvider, how can I prevent it from notifying uriDirectory as well?
Thanks!
Edit: So my solution so far is just to have a boolean that is set to true when I notify a uriItem. Then when it notifies the parent, uriDirectory, it will see that the boolean is true and won't perform any operations. After, I set the boolean back to false.
You can write your own CursorLoader. The default cursor loaders register a content observer via Cursor.RegisterContentObserver(ContentObserver observer). Instead, we want to use registerContentObserver(Uri uri, boolean notifyForDescendants, ContentObserver observer).
I'm not sure if you are using the support library CursorLoader but for the greatest applicability, that's what I'm using.
The only changes from the stock android versions are in loadInBackground(). You should create an entire class instead of just extending android's and overriding loadInBackground because it protects you from future changes made to Android. Be advised that this will not use any notification url you set for the cursor in your ContentProvider unless you the device is KitKat or newer
Uri notificationUri;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {
notificationUri = cursor.getNotificationUri();
} else {
notificationUri = mUri;
}
getContext().getContentResolver().registerContentObserver(
notificationUri != null ? notificationUri : mUri,
false, //don't notify for descendants
mObserver
);
Full class descendantChangeIgnoringCursorLoader.java:
package com.innomatixdata.busscan.utils;
import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.support.v4.content.AsyncTaskLoader;
import android.support.v4.content.ContentResolverCompat;
import android.support.v4.content.Loader;
import java.io.FileDescriptor;
import java.io.PrintWriter;
import java.util.Arrays;
public class DescendantChangeIgnoringCursorLoader extends AsyncTaskLoader<Cursor> {
final Loader.ForceLoadContentObserver mObserver;
Uri mUri;
String[] mProjection;
String mSelection;
String[] mSelectionArgs;
String mSortOrder;
Cursor mCursor;
android.support.v4.os.CancellationSignal mCancellationSignal;
/* Runs on a worker thread */
#Override
public Cursor loadInBackground() {
synchronized (this) {
if (isLoadInBackgroundCanceled()) {
throw new android.support.v4.os.OperationCanceledException();
}
mCancellationSignal = new android.support.v4.os.CancellationSignal();
}
try {
Cursor cursor = ContentResolverCompat.query(getContext().getContentResolver(),
mUri, mProjection, mSelection, mSelectionArgs, mSortOrder,
mCancellationSignal);
if (cursor != null) {
try {
// Ensure the cursor window is filled.
cursor.getCount();
Uri notificationUri;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {
notificationUri = cursor.getNotificationUri();
} else {
notificationUri = mUri;
}
getContext().getContentResolver().registerContentObserver(
notificationUri != null ? notificationUri : mUri,
false, //don't notify for descendants
mObserver
);
} catch (RuntimeException ex) {
cursor.close();
throw ex;
}
}
return cursor;
} finally {
synchronized (this) {
mCancellationSignal = null;
}
}
}
#Override
public void cancelLoadInBackground() {
super.cancelLoadInBackground();
synchronized (this) {
if (mCancellationSignal != null) {
mCancellationSignal.cancel();
}
}
}
/* Runs on the UI thread */
#Override
public void deliverResult(Cursor cursor) {
if (isReset()) {
// An async query came in while the loader is stopped
if (cursor != null) {
cursor.close();
}
return;
}
Cursor oldCursor = mCursor;
mCursor = cursor;
if (isStarted()) {
super.deliverResult(cursor);
}
if (oldCursor != null && oldCursor != cursor && !oldCursor.isClosed()) {
oldCursor.close();
}
}
/**
* Creates an empty unspecified CursorLoader. You must follow this with
* calls to {#link #setUri(Uri)}, {#link #setSelection(String)}, etc
* to specify the query to perform.
*/
public DescendantChangeIgnoringCursorLoader(Context context) {
super(context);
mObserver = new Loader.ForceLoadContentObserver();
}
/**
* Creates a fully-specified CursorLoader. See {#link ContentResolver#query(Uri, String[],
* String, String[], String) ContentResolver.query()} for documentation on the meaning of the
* parameters. These will be passed as-is to that call.
*/
public DescendantChangeIgnoringCursorLoader(Context context, Uri uri, String[] projection, String selection,
String[] selectionArgs, String sortOrder) {
super(context);
mObserver = new Loader.ForceLoadContentObserver();
mUri = uri;
mProjection = projection;
mSelection = selection;
mSelectionArgs = selectionArgs;
mSortOrder = sortOrder;
}
/**
* Starts an asynchronous load of the contacts list data. When the result is ready the callbacks
* will be called on the UI thread. If a previous load has been completed and is still valid
* the result may be passed to the callbacks immediately.
*
* Must be called from the UI thread
*/
#Override
protected void onStartLoading() {
if (mCursor != null) {
deliverResult(mCursor);
}
if (takeContentChanged() || mCursor == null) {
forceLoad();
}
}
/**
* Must be called from the UI thread
*/
#Override
protected void onStopLoading() {
// Attempt to cancel the current load task if possible.
cancelLoad();
}
#Override
public void onCanceled(Cursor cursor) {
if (cursor != null && !cursor.isClosed()) {
cursor.close();
}
}
#Override
protected void onReset() {
super.onReset();
// Ensure the loader is stopped
onStopLoading();
if (mCursor != null && !mCursor.isClosed()) {
mCursor.close();
}
mCursor = null;
}
public Uri getUri() {
return mUri;
}
public void setUri(Uri uri) {
mUri = uri;
}
public String[] getProjection() {
return mProjection;
}
public void setProjection(String[] projection) {
mProjection = projection;
}
public String getSelection() {
return mSelection;
}
public void setSelection(String selection) {
mSelection = selection;
}
public String[] getSelectionArgs() {
return mSelectionArgs;
}
public void setSelectionArgs(String[] selectionArgs) {
mSelectionArgs = selectionArgs;
}
public String getSortOrder() {
return mSortOrder;
}
public void setSortOrder(String sortOrder) {
mSortOrder = sortOrder;
}
#Override
public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) {
super.dump(prefix, fd, writer, args);
writer.print(prefix); writer.print("mUri="); writer.println(mUri);
writer.print(prefix); writer.print("mProjection=");
writer.println(Arrays.toString(mProjection));
writer.print(prefix); writer.print("mSelection="); writer.println(mSelection);
writer.print(prefix); writer.print("mSelectionArgs=");
writer.println(Arrays.toString(mSelectionArgs));
writer.print(prefix); writer.print("mSortOrder="); writer.println(mSortOrder);
writer.print(prefix); writer.print("mCursor="); writer.println(mCursor);
}
}
I have built a custom component button, but somehow the action is not invoked. When debugging the getAction-Method within the component and invoking the supplied MethodeExpression the Bean-Method is called as expected. But due to some reason, the Expression is not invoked when pressing the button in the browser.
Is there some kind of additional Interface necessary to pass the action to the embedded button-component?
Any help is very appreciated since I am stuck at this issue for some days now
MyClass:
public class MyClass extends UIPanel implements SystemEventListener
{
private UIForm form;
private HtmlCommandButton buttonOk;
public MyClass()
{
FacesContext context = getFacesContext();
UIViewRoot root = context.getViewRoot();
root.subscribeToViewEvent(PostAddToViewEvent.class, this);
}
#Override
public void processEvent(SystemEvent event)
{
this.form = new UIForm();
this.buttonOk = new HtmlCommandButton();
this.buttonOk.setId("okButtonId");
this.buttonOk.setActionExpression(getAction());
this.buttonOk.setValue("OK");
this.form.getChildren().add(this.buttonOk);
getChildren().add(this.form);
}
private enum PropertyKeys
{
action, text, titel
}
public MethodExpression getAction()
{
return (MethodExpression) getStateHelper().eval(PropertyKeys.action);
}
public void setAction(MethodExpression actionExpression)
{
getStateHelper().put(PropertyKeys.action, actionExpression);
}
public String getText()
{
return (String) getStateHelper().eval(PropertyKeys.text);
}
public void setText(String text)
{
getStateHelper().put(PropertyKeys.text, text);
}
public String getTitel()
{
return (String) getStateHelper().eval(PropertyKeys.titel);
}
public void setTitel(String titel)
{
getStateHelper().put(PropertyKeys.titel, titel);
}
#Override
public void encodeAll(FacesContext context) throws IOException
{
ResponseWriter writer = context.getResponseWriter();
writer.startElement(HTML.DIV_ELEM, this);
writer.writeText(getText(), null);
this.form.encodeAll(context);
writer.endElement(HTML.DIV_ELEM);
}
#Override
public void encodeChildren(FacesContext context) throws IOException
{
}
#Override
public boolean isListenerForSource(Object source)
{
return (source instanceof MyClass);
}
}
MyClassHandler:
public class MyClassHandler extends ComponentHandler
{
public MyClassHandler(ComponentConfig config)
{
super(config);
}
#SuppressWarnings("rawtypes")
#Override
protected MetaRuleset createMetaRuleset(Class type)
{
return super.createMetaRuleset(type).addRule(new MethodRule("action", String.class, new Class[] { ActionEvent.class }));
}
}
myView Method:
...
public String myMethod()
{
System.err.println("myMethod");
return "/some/path/yadayada.xhtml";
}
...
MyView.xhtml
<myTag action="#{myView.myMethod}" id="id1" titel="bla" text="bleh" />
Exdending UICommand is enough, since you only want one action to be executed.
You have to provide two additional MethodExpressions via the tag-attributes and within the decode-method you can check which button has been pressed and redirect the particular MethodExpression to the standard-action provided by UICommand. This way, you dont have to worry about the legacy-interface ActionSource, or how Events are broadcasted.
public void decode(FacesContext contex)
{
Map<String,String> map = context.getExternalContext.getRequestParameterMap();
// your rendered buttons need a name you check for
final boolean okPressed = map.containsKey( getClientId + ":ok" );
final boolean cancelPressed = map.containsKey( getClientId + ":cancel" );
if(okPressed || cancelPressed)
{
MethodExpression exp = null;
if(okPressed)
{
exp = getActionOk();
}
else
{
exp = getActionCancel();
}
// redirect to standard action
setActionExpression(exp);
queueEvent(new ActionEvent(this));
}
}
In order to make use of of this you need two attributes (actionOk and actionCancel) which use Method Expressions (setter and getter). Those have to be configured by a ComponentHandler as you did for the action-attribute.