Render a single message for a specific component.
Set-up for Rendering
Obtain the "summary" and "detail" properties from
UIMessage component. If not present, keep
the
empty string as the value, respectively. Obtain the first
FacesMessage to render from the component,
using
the "for" property of the UIMessage. This
will be
the only message we render. Obtain the severity style for this
message. If the severity of the message is
FacesMessage.SEVERITY_INFO, the severity
style
comes from the value of the "infoStyle" attribute. If the
severity of the message is
FacesMessage.SEVERITY_WARN, the severity
style
comes from the value of the "warnStyle" attribute, and so on for
each of the severities, INFO, WARN, ERROR
and
FATAL. The same rules apply for obtaining
the
severity style class, but instead of "infoStyle, warnStyle", etc
use "infoClass, warnClass", etc. Obtain the "style",
"styleClass" and "layout" attributes from the
UIMessage component. If we have a "style"
attribute and a severity style attribute, use the severity style
attribute as the value of the "style" attribute. If we have no
"style" attribute, but do have a severity style, use the
severity style as the value of the "style" attribute. The same
precedence rules apply for the style class. Obtain the value of
the dir and lang
attributes.
Rendering
For the message renderer, we only render one row, for the
first
message. For the messages renderer, we render as many rows as we
have messages. If any of the "dir", "lang", "style" or
"styleClass" attributes has a non-null value (as determined
above), render a "span" element, outputting the value of the
"style" attribute as the the value of the "style" attribute, and
outputting the value of the "styleClass" attribute as the value of
the "class" attribute on the "span" element. Output the "dir" and
"lang" attributes as well, if they are present. If the
UIMessage has a "tooltip" attribute with
the value of
"true", and the UIMessage has "showSummary"
and
"showDetail" properties with the value "true", if we haven't
already written out the "span", output the "summary" as the value
of the "title" attribute on the "span". If we haven't already
written out a "title" attribute, and "showSummary" is true, output
the summary. If "showDetail" is true, output the detail. Close
out the span if necessary.
| Info | Value |
|---|---|
| Component Type | javax.faces.HtmlMessage |
| Handler Class | None |
| Renderer Type | javax.faces.Message |
| Description | None |
| Name | Required | Type | Description |
|---|---|---|---|
for | true | javax.el.ValueExpression
(must evaluate to java.lang.String)
| Client identifier of the component for which to display messages. |
id | false | javax.el.ValueExpression
(must evaluate to java.lang.String)
| The component identifier for this component. This value must be unique within the closest parent component that is a naming container. |
rendered | false | javax.el.ValueExpression
(must evaluate to java.lang.Boolean)
| Flag indicating whether or not this component should be rendered (during Render Response Phase), or processed on any subsequent form submit. The default value for this property is true. |
showDetail | false | javax.el.ValueExpression
(must evaluate to java.lang.Boolean)
| Flag indicating whether the detail portion of displayed messages should be included. Default value is "true". |
showSummary | false | javax.el.ValueExpression
(must evaluate to java.lang.Boolean)
| Flag indicating whether the summary portion of displayed messages should be included. Default value is "false". |
dir | false | javax.el.ValueExpression
(must evaluate to java.lang.String)
| Direction indication for text that does not inherit directionality. Valid values are "LTR" (left-to-right) and "RTL" (right-to-left). |
errorClass | false | javax.el.ValueExpression
(must evaluate to java.lang.String)
| CSS style class to apply to any message with a severity class of "ERROR". |
errorStyle | false | javax.el.ValueExpression
(must evaluate to java.lang.String)
| CSS style(s) to apply to any message with a severity class of "ERROR". |
fatalClass | false | javax.el.ValueExpression
(must evaluate to java.lang.String)
| CSS style class to apply to any message with a severity class of "FATAL". |
fatalStyle | false | javax.el.ValueExpression
(must evaluate to java.lang.String)
| CSS style(s) to apply to any message with a severity class of "FATAL". |
infoClass | false | javax.el.ValueExpression
(must evaluate to java.lang.String)
| CSS style class to apply to any message with a severity class of "INFO". |
infoStyle | false | javax.el.ValueExpression
(must evaluate to java.lang.String)
| CSS style(s) to apply to any message with a severity class of "INFO". |
lang | false | javax.el.ValueExpression
(must evaluate to java.lang.String)
| Code describing the language used in the generated markup for this component. |
style | false | javax.el.ValueExpression
(must evaluate to java.lang.String)
| CSS style(s) to be applied when this component is rendered. |
styleClass | false | javax.el.ValueExpression
(must evaluate to 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. |
title | false | javax.el.ValueExpression
(must evaluate to java.lang.String)
| Advisory title information about markup elements generated for this component. |
tooltip | false | javax.el.ValueExpression
(must evaluate to java.lang.Boolean)
| Flag indicating whether the detail portion of the message should be displayed as a tooltip. |
warnClass | false | javax.el.ValueExpression
(must evaluate to java.lang.String)
| CSS style class to apply to any message with a severity class of "WARN". |
warnStyle | false | javax.el.ValueExpression
(must evaluate to java.lang.String)
| CSS style(s) to apply to any message with a severity class of "WARN". |
binding | false | javax.el.ValueExpression
(must evaluate to javax.faces.component.UIComponent)
| The ValueExpression linking this component to a property in a backing bean |
role | false | javax.el.ValueExpression
(must evaluate to java.lang.String)
|
Per the WAI-ARIA spec and its relationship to HTML5 (Section title ARIA Role Attriubute), every HTML element may have a "role" attribute whose value must be passed through unmodified on the element on which it is declared in the final rendered markup. The attribute, if specified, must have a value that is a string literal that is, or an EL Expression that evaluates to, a set of space-separated tokens representing the various WAI-ARIA roles that the element belongs to. It is the page author's responsibility to ensure that the user agent is capable of correctly interpreting the value of this attribute. |