Class TransformTag
java.lang.Object
jakarta.servlet.jsp.tagext.TagSupport
org.springframework.web.servlet.tags.RequestContextAwareTag
org.springframework.web.servlet.tags.HtmlEscapingAwareTag
org.springframework.web.servlet.tags.TransformTag
- All Implemented Interfaces:
IterationTag
,JspTag
,Tag
,TryCatchFinally
,Serializable
The
<transform>
tag provides transformation for reference data values
from controllers and other objects inside a spring:bind
tag (or a
data-bound form element tag from Spring's form tag library).
The BindTag has a PropertyEditor that it uses to transform properties of a bean to a String, usable in HTML forms. This tag uses that PropertyEditor to transform objects passed into this tag.
Attribute | Required? | Runtime Expression? | Description |
---|---|---|---|
htmlEscape | false | true | Set HTML escaping for this tag, as boolean value. Overrides the default HTML escaping setting for the current page. |
scope | false | true | The scope to use when exported the result to a variable. This attribute is only used when var is also set. Possible values are page, request, session and application. |
value | true | true | The value to transform. This is the actual object you want to have transformed (for instance a Date). Using the PropertyEditor that is currently in use by the 'spring:bind' tag. |
var | false | true | The string to use when binding the result to the page, request, session or application scope. If not specified, the result gets outputted to the writer (i.e. typically directly to the JSP). |
- Since:
- 20.09.2003
- Author:
- Alef Arendsen, Juergen Hoeller
- See Also:
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Field Summary
Fields inherited from class org.springframework.web.servlet.tags.RequestContextAwareTag
logger, REQUEST_CONTEXT_PAGE_ATTRIBUTE
Fields inherited from class jakarta.servlet.jsp.tagext.TagSupport
id, pageContext
Fields inherited from interface jakarta.servlet.jsp.tagext.IterationTag
EVAL_BODY_AGAIN
Fields inherited from interface jakarta.servlet.jsp.tagext.Tag
EVAL_BODY_INCLUDE, EVAL_PAGE, SKIP_BODY, SKIP_PAGE
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Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionprotected final int
Called by doStartTag to perform the actual work.void
Set the scope to export the variable to.void
Set the value to transform, using the appropriate PropertyEditor from the enclosing BindTag.void
Set PageContext attribute name under which to expose a variable that contains the result of the transformation.Methods inherited from class org.springframework.web.servlet.tags.HtmlEscapingAwareTag
htmlEscape, isDefaultHtmlEscape, isHtmlEscape, isResponseEncodedHtmlEscape, setHtmlEscape
Methods inherited from class org.springframework.web.servlet.tags.RequestContextAwareTag
doCatch, doFinally, doStartTag, getRequestContext
Methods inherited from class jakarta.servlet.jsp.tagext.TagSupport
doAfterBody, doEndTag, findAncestorWithClass, getId, getParent, getValue, getValues, release, removeValue, setId, setPageContext, setParent, setValue
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Constructor Details
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TransformTag
public TransformTag()
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Method Details
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setValue
Set the value to transform, using the appropriate PropertyEditor from the enclosing BindTag.The value can either be a plain value to transform (a hard-coded String value in a JSP or a JSP expression), or a JSP EL expression to be evaluated (transforming the result of the expression).
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setVar
Set PageContext attribute name under which to expose a variable that contains the result of the transformation. -
setScope
Set the scope to export the variable to. Default is SCOPE_PAGE ("page"). -
doStartTagInternal
Description copied from class:RequestContextAwareTag
Called by doStartTag to perform the actual work.- Specified by:
doStartTagInternal
in classRequestContextAwareTag
- Returns:
- same as TagSupport.doStartTag
- Throws:
JspException
- See Also:
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