interface If { ... }
class Impl implements If { ... }
function test(type:Class, obj) {
return obj instanceof type;
}
test(If, new Impl());
The call to test on the last line returns false, but it should be true. How can I do this check right, with the requirement that it must be inside the function?
Real code:
public function iterate(callback:Function, type:Class = null) {
for (var node:EntityListNode = beginNode; node != null; node = node.next) {
if (type == null || node.entity instanceof type) callback(node.entity);
}
}
if(Object is IInterface) ... works fine for that AFAIK.
Related
I need to save an object's state into a file and retrieve it later. I found JSON serialization would help and found this method Json.gobject_serialize. Using this method, I can successfully serialize objects containing string properties. But what should I do, if the object A consists of another object (say B) within it and I need to serialize object A.
EDIT
What should I do if the object A consists of array (say B) of objects?
I created a small test program for this purpose and I failed in that try. I cannot find any detailed documentation about JSON Serialization for vala.
public class Foo : Object {
public int iFoo {get; set;}
public string sFoo {get; set;}
Bar[] _bar = {};
public Bar[] bar {get {return _bar;} set{_bar = value;}}
public class Bar : Object {
public int iBar {get; set;}
public string sBar {get; set;}
construct {
iBar = 02;
sBar = "OutOfRange";
}
}
construct {
_bar += new Bar();
iFoo = 74;
sFoo = "GIrafee";
}
public static int main () {
Json.Node root = Json.gobject_serialize (new Foo());
Json.Generator generator = new Json.Generator ();
generator.set_root (root);
stdout.printf(generator.to_data (null) + "\n");
return 0;
}
}
Serialization with JSON-GLib is recursive for properties containing complex types.
If the property of a GObject contains another GObject, json_gobject_serialize() will recursively call json_gobject_serialize() on the instance stored inside the property — or serialize the null if the property is unset.
I've implemented a object to support Json.Serializable interface as follow:
public class DbObject : GLib.Object, Json.Serializable
{
public Json.Object? meta { get; construct set; default = null; }
public VersionSync version { get; set; default = VersionSync.UNKNOWN; }
public virtual Value get_property (ParamSpec pspec)
{
Value prop_value = GLib.Value(pspec.value_type);
(this as GLib.Object).get_property(pspec.name, ref prop_value);
stdout.printf ("%s --> %s\n", prop_value.type_name(), prop_value.strdup_contents());
return prop_value;
}
public virtual void set_property (ParamSpec pspec, Value value)
{
(this as GLib.Object).set_property (pspec.name, value);
}
public unowned ParamSpec? find_property (string name)
{
return ((ObjectClass) get_type ().class_ref ()).find_property (name);
}
public virtual Json.Node serialize_property (string property_name, Value #value, ParamSpec pspec)
{
if (#value.type ().is_a (typeof (Json.Object)))
{
var obj = #value as Json.Object;
if (obj != null)
{
var node = new Json.Node (NodeType.OBJECT);
node.set_object (obj);
return node;
}
}
else if (#value.type ().is_a (typeof (Gee.ArrayList)))
{
unowned Gee.ArrayList<GLib.Object> list_value = #value as Gee.ArrayList<GLib.Object>;
if (list_value != null || property_name == "data")
{
var array = new Json.Array.sized (list_value.size);
foreach (var item in list_value)
{
array.add_element (gobject_serialize (item));
}
var node = new Json.Node (NodeType.ARRAY);
node.set_array (array);
return node;
}
}
else if (#value.type ().is_a (typeof (GLib.Array)))
{
unowned GLib.Array<GLib.Object> array_value = #value as GLib.Array<GLib.Object>;
if (array_value != null || property_name == "data")
{
var array = new Json.Array.sized (array_value.length);
for (int i = 0; i < array_value.length; i++) {
array.add_element (gobject_serialize (array_value.index(i)));
}
var node = new Json.Node (NodeType.ARRAY);
node.set_array (array);
return node;
}
}
else if (#value.type ().is_a (typeof (HashTable)))
{
var obj = new Json.Object ();
var ht_string = #value as HashTable<string, string>;
if (ht_string != null)
{
ht_string.foreach ((k, v) => {
obj.set_string_member (k, v);
});
var node = new Json.Node (NodeType.OBJECT);
node.set_object (obj);
return node;
} else {
var ht_object = #value as HashTable<string, GLib.Object>;
if (ht_object != null)
{
ht_object.foreach ((k, v) => {
obj.set_member (k, gobject_serialize (v));
});
var node = new Json.Node (NodeType.OBJECT);
node.set_object (obj);
return node;
}
}
}
return default_serialize_property (property_name, #value, pspec);
}
public virtual bool deserialize_property (string property_name, out Value #value, ParamSpec pspec, Json.Node property_node)
{
return default_deserialize_property (property_name, out #value, pspec, property_node);
}
}
I've written an CustomResourceHandler to add a version number to my js and css files, which works fine, but all primefaces resources get a double version number now.
Without CustomResourceHandler:
javax.faces.resource/jquery/jquery-plugins.js.xhtml?ln=primefaces&v=6.0.17
With CustomResourceHandler:
javax.faces.resource/jquery/jquery-plugins.js.xhtml?ln=primefaces&v=6.0.17&v=6.0.17
My CustomResourceHandler:
public class ExtendedResourceHandler extends PrimeResourceHandler {
public ExtendedResourceHandler(ResourceHandler wrapped) {
super(wrapped);
}
#Override
public Resource createResource(String resourceName, String libraryName) {
if (!org.primefaces.util.Constants.LIBRARY.equalsIgnoreCase(libraryName)
&& !org.primefaces.extensions.util.Constants.LIBRARY.equalsIgnoreCase(libraryName) && !"javax.faces".equalsIgnoreCase(libraryName) && resourceName != null
&& (resourceName.endsWith(".css") || resourceName.endsWith(".js"))) {
final Resource resource = super.createResource(resourceName, libraryName);
if (resource == null) {
return null;
}
return new ResourceWrapper() {
#Override
public String getRequestPath() {
String resultPath = super.getRequestPath();
resultPath += (resultPath.contains("?") ? "&" : "?") + "version=V6326";
return resultPath;
}
#Override
public Resource getWrapped() {
return resource;
}
};
} else {
return super.createResource(resourceName, libraryName);
}
}
}
faces-config.xml:
<resource-handler>de.sync4.cockpit.web.beans.resourcehandler.ExtendedResourceHandler</resource-handler>
Because of that problem I can't get the pe:ckEditor to work, because it can't find necessary resources. Any idea what's wrong with my Handler?
Found the Problem. I needed to extend the ResourceHandlerWrapper, not the PrimeResourceHandler.
I also have an ExtendedBeanELResolver. I had to return null there if the base object is an instance of my custom handler.
In magento 1.9 What is diffrence between getstoreconfig() and getstoreconfigflag() methods?
The methods look like this:
public static function getStoreConfig($path, $store = null)
{
return self::app()->getStore($store)->getConfig($path);
}
public static function getStoreConfigFlag($path, $store = null)
{
$flag = strtolower(self::getStoreConfig($path, $store));
if (!empty($flag) && 'false' !== $flag) {
return true;
} else {
return false;
}
}
The only difference is that getStoreConfig() will return the exact value while getStoreConfigFlag() returns boolean true or false.
Both methods send us to Mage_Core_Model_Store::getConfig().
It appears that filtering an ObservableCollection with CollectionViewSource is not possible in WinRT:
See here!
I can filter using LINQ, but how do I get the UI to update if changes that affect the filtered data are made?
I ended up writing my own class to achieve the desired effect:
public class ObservableCollectionView<T> : ObservableCollection<T>
{
private ObservableCollection<T> _view;
private Predicate<T> _filter;
public ObservableCollectionView(IComparer<T> comparer)
: base(comparer)
{
}
public ObservableCollectionView(IComparer<T> comparer, IEnumerable<T> collection)
: base(comparer, collection)
{
}
public ObservableCollectionView(IComparer<T> comparer, IEnumerable<T> collection, Predicate<T> filter)
: base(comparer, collection == null ? new T[] { } : collection)
{
if (filter != null)
{
_filter = filter;
if (collection == null)
_view = new ObservableCollection<T>(comparer);
else
_view = new ObservableCollection<T>(comparer, collection);
}
}
public ObservableCollection<T> View
{
get
{
return (_filter == null ? this : _view);
}
}
public Predicate<T> Filter
{
get
{
return _filter;
}
set
{
if (value == null)
{
_filter = null;
_view = new ObservableCollection<T>(Comparer);
}
else
{
_filter = value;
Fill();
}
}
}
private void Fill()
{
_view = new ObservableCollection<T>(Comparer);
foreach (T item in this)
{
if (Filter(item))
View.Add(item);
}
}
private int this[T item]
{
get
{
int foundIndex = -1;
for (int index = 0; index < View.Count; index++)
{
if (View[index].Equals(item))
{
foundIndex = index;
break;
}
}
return foundIndex;
}
}
protected override void OnCollectionChanged(NotifyCollectionChangedEventArgs e)
{
base.OnCollectionChanged(e);
if (_filter != null)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
foreach (T item in e.NewItems)
if (Filter(item))
View.Add(item);
break;
case NotifyCollectionChangedAction.Move:
break;
case NotifyCollectionChangedAction.Remove:
foreach (T item in e.OldItems)
if (Filter(item))
View.Remove(item);
break;
case NotifyCollectionChangedAction.Replace:
for (int index = 0; index < e.OldItems.Count; index++)
{
T item = (T)e.OldItems[index];
if (Filter(item))
{
int foundIndex = this[item];
if (foundIndex != -1)
View[foundIndex] = (T)e.NewItems[index];
}
}
break;
case NotifyCollectionChangedAction.Reset:
Fill();
break;
}
}
}
protected override void OnPropertyChanged(PropertyChangedEventArgs e)
{
base.OnPropertyChanged(e);
if (_filter != null)
{
// TODO: Implement code for property changes
}
}
}
Not yet perfect. So improvements/suggestions welcomed.
You can now bind this object, directly to a control using the View property.
You need to make sure the filtering changes are observable, so you can set the source of the CollectionViewSource to an ObservableCollection and make the changes on that collection or assign a new Source of the CVS to a new, filtered collection.
I have a form with checkboxes, on form submit.
If one checked, it comes in as string, if multiple checked, it comes in as an json array.
How do I get the object as an array?
TypeReference<HashMap> typeRef = new TypeReference<HashMap>(){};
JsonFactory factory = new JsonFactory();
ObjectMapper mapper = new ObjectMapper(factory);
HashMap<String, Object> bean = mapper.readValue(formBean, typeRef);
bean.get("somevarible") < I want to get this as array regardless how many boxes checked
Thanks
EDIT
I am using this function, how can I update it?
$.fn.serializeObject = function() {
var o = {};
var a = this.serializeArray();
$.each(a, function() {
if (o[this.name]) {
if (!o[this.name].push) {
o[this.name] = [o[this.name]];
}
o[this.name].push(this.value || '');
} else {
o[this.name] = this.value || '';
}
});
return o;
};
I had a similar issue deserializing json (aka "the checkbox problem"). My (ugly) work-around was to use #JsonAnySetter to manually do the "right" thing with the incoming (string/list) value.
// q is always just a string.
#JsonProperty("q")
private String query;
// fq could be a string or a list.
private List<String> filterQuery;
// (get/set/add omitted)
// XXX - this is an evil hack to support 1 or >1 fq values
// there must be a better way to support 2-way deserialization
#JsonAnySetter
void addEntry(String key, Object value)
{
if ("fq".equals(key))
{
if (value == null)
{
// can this even happen?
} else if (String.class.equals(value.getClass()))
{
addFilterQuery((String) value);
} else
{
setFilterQuery((List<String>) value);
}
}
}