| |||||||
FRAMES NO FRAMES |
Render an HTML option list.
Decode Behavior
This section documents the decode behavior for all renderers
that handle UISelectMany
or UISelectOne
components.
Decode Behavior forUISelectMany
components
Obtain the Map
from the
"requestParameterValuesMap" property of theExternalContext
. If the Map
contains
an entry for the "clientId" of the component, pass the value of
the entry, cast to a String []
, to thesetSubmittedValue()
method of the component, which
must be an EditableValueHolder
. If theMap
does not contain an entry, create an emptyString
array and callsetSubmittedValue()
with it.
Decode Behavior forUISelectOne
components
Obtain the Map
from the "requestParameterMap"
property of the ExternalContext
. If there is aMap
entry for the "clientId" property of the
component, pass it to the setSubmittedValue()
method
of the component.
Encode Behavior
Render an HTML "select" element. Render the clientId of
the component as the value of the "name" attribute. If the "styleClass"
attribute is specified, render its value as the value of the "class"
attribute on the "select" element. If the component is a UISelectMany
instance, render "multiple" as the value of the
"multiple" attribute. If the "size" attribute is specified, render its
value as the value of the "size" attribute. Otherwise use the number of
items as the value of the "size" attribute.
Rendering the "option" elements
The only valid children of this component areUISelectItem
or UISelectItems
instances.
Iterate over the children of this component, and accrue a list ofjavax.faces.model.SelectItem
instances. If the
current child is a UISelectItem
create aSelectItem
instance from its itemValue,
itemLabel
and itemDescription
properties, add
it to the list. If the current child is aUISelectItems
instance, call itsgetValue()
method. If the result is aSelectItem
bean, add it to the list. If the result
is an array of SelectItem
beans, add each one t othe
list. If the result is a Collection
ofSelectItem
beans, add each one to the list. If the
result isa Map
, create a SelectItem
bean
for each entry in the Map
using the key as the label,
the value as the value, and null
as the description.
Iterate over the list of SelectItem
beans. If the
current element is a SelectItemGroup
, render an
"optgroup" element with a "label" attribute, the value of which is
the "label" property from the current element, then callgetSelectItems()
and render each element as below.
If the current element is not a SelectItemGroup
,
render an "option" element. Follow the conversion rules in the
spec to obtain a renderable String
from the "value"
property of the current element, render that as the value of the
"value" atribute. Now it is time to see if the current element is
the selected value. call itsgetSubmittedValue()
method, casting the result to anObject []
, otherwise the component must be aUISelectOne
instance, call itsgetSubmittedValue()
method and create an Object
[]
around the result. If the resultant array is non-null,
we look in the array for a value that, when we pass the renderable
value to its equals()
method, it returnstrue
, meaning the current element is selected. If
the resultant array is null
, if the component is aUISelectMany
, call its getValue()
method. If the result is a List
obtain the values in
the list as an array. Otherwise, the component must be aUISelectOne
instance. Call itsgetValue()
method, which must be an Object array.
Look for an element in the resultant array that, 1. when we pass
the renderable value to its equals()
method, it
returns true
, or 2. if the renderable value is null,
and there is a null element in the array, also conclude that the
current element is selected. Otherwise the current element is not
selected. Now, if the current value is selected, write out an
HTML boolean property "selected". If the current
SelectItem.isDisabled() returns true, render "disabled" as the
value of the "disabled" attribute.
Tag Information | |
Tag Class | com.sun.faces.taglib.html_basic.SelectManyListboxTag |
TagExtraInfo Class | com.sun.faces.taglib.FacesTagExtraInfo |
Body Content | JSP |
Display Name | None |
Attributes | ||||
Name | Required | Request-time | Type | Description |
converter | false | false | java.lang.String | Converter instance registered with this component. |
id | false | false | java.lang.String | The component identifier for this component. This value must be unique within the closest parent component that is a naming container. |
immediate | false | false | java.lang.String | Flag indicating that this component's value must be converted and validated immediately (that is, during Apply Request Values phase), rather than waiting until Process Validations phase. |
rendered | false | false | java.lang.String | Flag indicating whether or not this component should be rendered (during Render Response Phase), or processed on any subsequent form submit. |
required | false | false | java.lang.String | Flag indicating that the user is required to provide a submitted value for this input component. |
validator | false | false | java.lang.String | MethodBinding representing a validator method that will be called during Process Validations to perform correctness checks on the value of this component. The expression must evaluate to a public method that takes FacesContext, UIComponent, and Object parameters, with a return type of void. |
value | false | false | java.lang.String | The current value of this component. |
valueChangeListener | false | false | java.lang.String | MethodBinding representing a value change listener method that will be notified when a new value has been set for this input component. The expression must evaluate to a public method that takes a ValueChangeEvent parameter, with a return type of void. |
accesskey | false | false | java.lang.String | Access key that, when pressed, transfers focus to this element. |
dir | false | false | java.lang.String | Direction indication for text that does not inherit directionality. Valid values are "LTR" (left-to-right) and "RTL" (right-to-left). |
disabled | false | false | java.lang.String | Flag indicating that this element must never receive focus or be included in a subsequent submit. |
disabledClass | false | false | java.lang.String | CSS style class to apply to the rendered label on disabled options. |
enabledClass | false | false | java.lang.String | CSS style class to apply to the rendered label on enabled options. |
lang | false | false | java.lang.String | Code describing the language used in the generated markup for this component. |
onblur | false | false | java.lang.String | Javascript code executed when this element loses focus. |
onchange | false | false | java.lang.String | Javascript code executed when this element loses focus and its value has been modified since gaining focus. |
onclick | false | false | java.lang.String | Javascript code executed when a pointer button is clicked over this element. |
ondblclick | false | false | java.lang.String | Javascript code executed when a pointer button is double clicked over this element. |
onfocus | false | false | java.lang.String | Javascript code executed when this element receives focus. |
onkeydown | false | false | java.lang.String | Javascript code executed when a key is pressed down over this element. |
onkeypress | false | false | java.lang.String | Javascript code executed when a key is pressed and released over this element. |
onkeyup | false | false | java.lang.String | Javascript code executed when a key is released over this element. |
onmousedown | false | false | java.lang.String | Javascript code executed when a pointer button is pressed down over this element. |
onmousemove | false | false | java.lang.String | Javascript code executed when a pointer button is moved within this element. |
onmouseout | false | false | java.lang.String | Javascript code executed when a pointer button is moved away from this element. |
onmouseover | false | false | java.lang.String | Javascript code executed when a pointer button is moved onto this element. |
onmouseup | false | false | java.lang.String | Javascript code executed when a pointer button is released over this element. |
onselect | false | false | java.lang.String | Javascript code executed when text within this element is selected by the user. |
readonly | false | false | java.lang.String | Flag indicating that this component will prohibit changes by the user. The element may receive focus unless it has also been disabled. |
size | false | false | java.lang.String | Number of available options to be shown at all times. If not specified, all available options are shown. |
style | false | false | java.lang.String | CSS style(s) to be applied when this component is rendered. |
styleClass | false | false | java.lang.String | Space-separated list of CSS style class(es) to be applied when this element is rendered. This value must be passed through as the "class" attribute on generated markup. |
tabindex | false | false | java.lang.String | Position of this element in the tabbing order for the current document. This value must be an integer between 0 and 32767. |
title | false | false | java.lang.String | Advisory title information about markup elements generated for this component. |
binding | false | false | java.lang.String | The value binding expression linking this component to a property in a backing bean |
Variables | No Variables Defined. |
| |||||||
FRAMES NO FRAMES |