UIComponentTag (Java EE 5 SDK)

javax.faces.webapp Class UIComponentTag

java.lang.Object
  javax.faces.webapp.UIComponentTagBase
      javax.faces.webapp.UIComponentClassicTagBase
          javax.faces.webapp.UIComponentTag

所有已实现的接口:

BodyTag, IterationTag, JspIdConsumer, JspTag, Tag

直接已知子类:

UIComponentBodyTag

public abstract class UIComponentTag

extends UIComponentClassicTagBase

implements Tag

UIComponentTag is the base class for all JSP custom actions that correspond to user interface components in a page that is rendered by JavaServer Faces.

In this version of the specification, UIComponentTag extends UIComponentClassicTagBase to add properties that use the Faces 1.1 Expression Language.

UIComponentTag

public UIComponentTag()

Deprecated. 

setBinding

public void setBinding(String binding)
                throws JspException

Deprecated. 

Set the value binding expression for our component.

参数:

binding - The new value binding expression

抛出异常:

IllegalArgumentException - if the specified binding is not a valid value binding expression.

JspException

hasBinding

protected boolean hasBinding()

Deprecated. 

Description copied from class: UIComponentClassicTagBase

Return true if this component has a non-null binding attribute. This method is necessary to allow subclasses that expose the binding property as an Faces 1.1 style EL property as well as subclasses that expose it as an EL API property.

规范说明:

hasBinding in class UIComponentClassicTagBase

setRendered

public void setRendered(String rendered)

Deprecated. 

Set an override for the rendered attribute.

参数:

rendered - The new value for rendered attribute

isSuppressed

protected boolean isSuppressed()

Deprecated. 

isValueReference

public static boolean isValueReference(String value)

Deprecated. 

Return true if the specified value conforms to the syntax requirements of a value binding expression. Such expressions ` * may be used on most component tag attributes to signal a desire for deferred evaluation of the attribute or property value to be set on the underlying UIComponent.

参数:

value - The value to evaluate

抛出异常:

NullPointerException - if value is null

release

public void release()

Deprecated. 

Release any resources allocated during the execution of this tag handler.

规范说明:

release in interface Tag

重写:

release in class UIComponentClassicTagBase

setProperties

protected void setProperties(UIComponent component)

Deprecated. 

Description copied from class: UIComponentClassicTagBase

Override properties and attributes of the specified component, if the corresponding properties of this tag handler instance were explicitly set. This method must be called ONLY if the specified UIComponent was in fact created during the execution of this tag handler instance, and this call will occur BEFORE the UIComponent is added to the view.

Tag subclasses that want to support additional set properties must ensure that the base class setProperties() method is still called. A typical implementation that supports extra properties foo and bar would look something like this:

 protected void setProperties(UIComponent component) {
   super.setProperties(component);
   if (foo != null) {
     component.setAttribute("foo", foo);
   }
   if (bar != null) {
     component.setAttribute("bar", bar);
   }
 }
 

The default implementation overrides the following properties:

• rendered - Set if a value for the rendered property is specified for this tag handler instance.
• rendererType - Set if the getRendererType() method returns a non-null value.

规范说明:

setProperties in class UIComponentClassicTagBase

参数:

component - UIComponent whose properties are to be overridden

createComponent

protected UIComponent createComponent(FacesContext context,
                                      String newId)

Deprecated. 

Implement createComponent using Faces 1.1 EL API.

规范说明:

createComponent in class UIComponentClassicTagBase

参数:

context - FacesContext for the current request

newId - id of the component

getParentUIComponentTag

public static UIComponentTag getParentUIComponentTag(PageContext context)

Deprecated. 

Locate and return the nearest enclosing UIComponentTag if any; otherwise, return null.

参数:

context - PageContext for the current page

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