Can any one tell me how I can get the immediate attribute value from Java code ?
I tried to the attribute in both the ways as below: My project is in jsf 1.2
<h:inputText value="" immediate="true">
<f:attribute name="immediate" value="true"/>
<f:attribute name="testAttribute" value="true"/>
</h:inputText>
I can see the 'testAttribute' in attributes Map but not the 'immediate' attribute.
if (UIComponentBase.getAttributes().containsKey("immediate")) {
this.immediate = (Boolean)comp.getAttributes().get("immediate");
}
The getAttributes() return an attributes map which does not have 'immediate' as an entry.
Please suggest another way to read the value of an immediate attribute.
Related
I have a form which contains a dropdown and two input fields.
<h:selectOneMenu />
<h:inputText />
<h:inputText />
I would like to make the required attribute of the input fields conditional depending on the selected value of the dropdown. If the user chooses the first item of the dropdown, then the input fields must be required. If the user chooses the second item, then those would not be required.
How can I achieve this?
Just bind the dropdown to the view and directly check its value in the required attribute.
<h:selectOneMenu binding="#{menu}" value="#{bean.item}">
<f:selectItem itemValue="first" itemLabel="First item" />
<f:selectItem itemValue="second" itemLabel="Second item" />
</h:selectOneMenu>
<h:inputText value="#{bean.input1}" required="#{menu.value eq 'first'}" />
<h:inputText value="#{bean.input2}" required="#{menu.value eq 'first'}" />
Note that the binding example is as-is. Do absolutely not set it to a bean property here. See also How does the 'binding' attribute work in JSF? When and how should it be used?
Also note that the ordering of the components is significant. If the menu is located below the inputs in the tree, use #{menu.submittedValue eq 'first'} instead. Or if you want to be independent from that, use #{param[menu.clientId] eq 'first'} instead.
Assuming you are using JSF 2.0: Let your SelectOneListBox execute with ajax and re-render the input fields on change of the list box:
A quick sketch:
<h:selectOneMenu value="#{myBean.myMenuValue}">
<f:ajax render="input1"/>
..
</h:selectOneMenu>
<h:inputText id="input1" value="#{myBean.myInputValue}"
required="#{myBean.myMenuValue == 'firstEntry'}" />
Is there a way to declare more than one "assignTo" attribute to one a4j:jsFunction? Or can i set more than one value to one "assignTo" attribute of one a4j:jsFunction?
This for example:
<a4j:jsFunction name="newJsFunc" ajaxSingle="true" id="arrJsFunc">
<a4j:actionparam name="param1" assignTo="#{bean.value}" assignTo="#{bean.value}"
actionListener="#{bean.actionListenerMethod}" />
</a4j:jsFunction>
Use a4j:param inside a4j:jsFunction instead of a4j:actionparam. In assignTo you can assign value for only 1 bean property. See description of assignTo attribute in VDL doc:
EL expression for updatable bean property. This property will be updated if the parent command component performs an actionEvent.
You can include as many <a4j:param> tags as you need. See book Practical RichFaces Chapter 3 (Listing 3-20). Pseudocode:
<a4j:jsFunction>
<a4j:param name="param1" assignTo="#{someBean.value1}" />
<a4j:param name="param2" assignTo="#{someBean.value2}" />
<a4j:param name="param3" assignTo="#{someBean.value3}" />
</a4j:jsFunction>
I have a form which contains a dropdown and two input fields.
<h:selectOneMenu />
<h:inputText />
<h:inputText />
I would like to make the required attribute of the input fields conditional depending on the selected value of the dropdown. If the user chooses the first item of the dropdown, then the input fields must be required. If the user chooses the second item, then those would not be required.
How can I achieve this?
Just bind the dropdown to the view and directly check its value in the required attribute.
<h:selectOneMenu binding="#{menu}" value="#{bean.item}">
<f:selectItem itemValue="first" itemLabel="First item" />
<f:selectItem itemValue="second" itemLabel="Second item" />
</h:selectOneMenu>
<h:inputText value="#{bean.input1}" required="#{menu.value eq 'first'}" />
<h:inputText value="#{bean.input2}" required="#{menu.value eq 'first'}" />
Note that the binding example is as-is. Do absolutely not set it to a bean property here. See also How does the 'binding' attribute work in JSF? When and how should it be used?
Also note that the ordering of the components is significant. If the menu is located below the inputs in the tree, use #{menu.submittedValue eq 'first'} instead. Or if you want to be independent from that, use #{param[menu.clientId] eq 'first'} instead.
Assuming you are using JSF 2.0: Let your SelectOneListBox execute with ajax and re-render the input fields on change of the list box:
A quick sketch:
<h:selectOneMenu value="#{myBean.myMenuValue}">
<f:ajax render="input1"/>
..
</h:selectOneMenu>
<h:inputText id="input1" value="#{myBean.myInputValue}"
required="#{myBean.myMenuValue == 'firstEntry'}" />
I have this code above which works perfectly when i select some of the items on him... The a4j:support works fine and rerender my another field correctly...
The problem is if i choose one item, and then i back to "noSelectionLabel"...
When i do this for some reason my a4j:support dont work, i dont get into my method "setarFormulario" and i dont rerender my another field...
<s:decorate template="layout/form.xhtml">
<ui:define name="label">Evento:</ui:define>
<h:selectOneMenu value="#{home.instance.evento}" required="true">
<s:selectItems value="#{eventoService.obterTodos()}" var="evento" label="#{messages[evento.nome]}" noSelectionLabel="#{messages['br.com.message.NoSelection']}" />
<s:convertEntity />
<a4j:support event="onchange" action="#{home.setarFormulario}" reRender="camposFormulario" ajaxSingle="true" />
</h:selectOneMenu>
</s:decorate>
How can i get into my method even if i select the noSelectionLabel? Then my home.instance.evento must be null.. or something like this...
Yor field h:selectOneMenu is required then selecting noSelectionLabel value will cause a validation error and if you had validation error, then the action="#{home.setarFormulario}" would never be called.
As a workaround you can set to true the attribute hideNoSelectionLabel for your s:selectItems then the noSelectionLabel will be hidden when a value is selected
<h:message for="id of the selectonemenu component " ></h:message>
or
remove the required =true from the selectonemenu tag
I am trying to validate a inputText box based on the selection of a CheckBox as shown below.
< <h:inputText required="#{param[facesContext.externalContext.response.namespace'form:checkBoxId']}"> >.
The issue is as you see, the component Ids are dynamic, I should be able to use facesContext.externalContext.response.namespace inside the EL expression. Is there a solution to it, appreciate any suggestions.
Thanks.
Just bind the UIComponent to a page scoped property and access its getValue() method.
<h:selectBooleanCheckbox binding="#{checkbox}" />
<h:inputText required="#{not empty checkbox.value and checkbox.value}" />
As to the dynamicness, you can also go around by just giving it a fixed id.
<h:form id="form">
<h:selectBooleanCheckbox id="checkbox" />
<h:inputText required="#{not empty param['form:checkbox'] and param['form:checkbox']}" />
</h:form>
It's however only ugly when it gets lengthy.