Class ChooseTag
- java.lang.Object
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- javax.servlet.jsp.tagext.TagSupport
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- org.apache.taglibs.standard.tag.common.core.ChooseTag
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- All Implemented Interfaces:
java.io.Serializable
,IterationTag
,JspTag
,Tag
public class ChooseTag extends TagSupport
Tag handler for <choose> in JSTL.
<choose> is a very simple tag that acts primarily as a container; it always includes its body and allows exactly one of its child <when> tags to run. Since this tag handler doesn't have any attributes, it is common.core to both the rtexprvalue and expression- evaluating versions of the JSTL library.
- See Also:
- Serialized Form
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Field Summary
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Fields inherited from interface javax.servlet.jsp.tagext.IterationTag
EVAL_BODY_AGAIN
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Fields inherited from interface javax.servlet.jsp.tagext.Tag
EVAL_BODY_INCLUDE, EVAL_PAGE, SKIP_BODY, SKIP_PAGE
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Constructor Summary
Constructors Constructor Description ChooseTag()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description int
doStartTag()
Default processing of the start tag, returning SKIP_BODY.boolean
gainPermission()
Returns status indicating whether a subtag should run or not.void
release()
Release state.void
subtagSucceeded()
Called by a subtag to indicate that it plans to evaluate its body.-
Methods inherited from class javax.servlet.jsp.tagext.TagSupport
doAfterBody, doEndTag, findAncestorWithClass, getId, getParent, getValue, getValues, removeValue, setId, setPageContext, setParent, setValue
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Method Detail
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release
public void release()
Description copied from class:TagSupport
Release state.- Specified by:
release
in interfaceTag
- Overrides:
release
in classTagSupport
- See Also:
Tag.release()
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gainPermission
public boolean gainPermission()
Returns status indicating whether a subtag should run or not.- Returns:
- true if the subtag should evaluate its condition and decide whether to run, false otherwise.
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subtagSucceeded
public void subtagSucceeded()
Called by a subtag to indicate that it plans to evaluate its body.
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doStartTag
public int doStartTag() throws JspException
Description copied from class:TagSupport
Default processing of the start tag, returning SKIP_BODY.- Specified by:
doStartTag
in interfaceTag
- Overrides:
doStartTag
in classTagSupport
- Returns:
- SKIP_BODY
- Throws:
JspException
- if an error occurs while processing this tag- See Also:
Tag.doStartTag()
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