Package org.apache.wiki.tags
Class BreadcrumbsTag
java.lang.Object
javax.servlet.jsp.tagext.TagSupport
org.apache.wiki.tags.WikiTagBase
org.apache.wiki.tags.BreadcrumbsTag
- All Implemented Interfaces:
Serializable
,javax.servlet.jsp.tagext.IterationTag
,javax.servlet.jsp.tagext.JspTag
,javax.servlet.jsp.tagext.Tag
,javax.servlet.jsp.tagext.TryCatchFinally
public class BreadcrumbsTag extends WikiTagBase
Implement a "breadcrumb" (most recently visited) trail. This tag can be added to any view jsp page.
Separate breadcrumb trails are not tracked across multiple browser windows.
The optional attributes are:
The optional attributes are:
maxpages, the number of pages to store, 10 by default
separator, the separator string to use between pages, " | " by default
This class is implemented by storing a breadcrumb trail, which is a fixed size queue, into a session variable "breadCrumbTrail". This queue is displayed as a series of links separated by a separator character.
- See Also:
- Serialized Form
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
BreadcrumbsTag.FixedQueue
Extends the LinkedList class to provide a fixed-size queue implementation -
Field Summary
Fields Modifier and Type Field Description static String
BREADCRUMBTRAIL_KEY
The name of the session attribute representing the breadcrumbtrailFields inherited from class org.apache.wiki.tags.WikiTagBase
m_wikiContext
Fields inherited from class javax.servlet.jsp.tagext.TagSupport
id, pageContext
Fields inherited from interface javax.servlet.jsp.tagext.IterationTag
EVAL_BODY_AGAIN
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 BreadcrumbsTag()
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Method Summary
Modifier and Type Method Description int
doWikiStartTag()
This method is allowed to do pretty much whatever he wants.int
getMaxpages()
Returns the maxpages.String
getSeparator()
Get the separator string.void
initTag()
This method is called when the tag is encountered within a new request, but before the setXXX() methods are called.void
setMaxpages(int maxpages)
Sets how many pages to show.void
setSeparator(String separator)
Set the separator string.Methods inherited from class org.apache.wiki.tags.WikiTagBase
doCatch, doEndTag, doFinally, doStartTag, setId, setPageContext
Methods inherited from class javax.servlet.jsp.tagext.TagSupport
doAfterBody, findAncestorWithClass, getId, getParent, getValue, getValues, release, removeValue, setParent, setValue
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Field Details
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BREADCRUMBTRAIL_KEY
The name of the session attribute representing the breadcrumbtrail- See Also:
- Constant Field Values
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Constructor Details
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BreadcrumbsTag
public BreadcrumbsTag()
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Method Details
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initTag
This method is called when the tag is encountered within a new request, but before the setXXX() methods are called. The default implementation does nothing.- Overrides:
initTag
in classWikiTagBase
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getMaxpages
Returns the maxpages. This may differ from what was set by setMaxpages().- Returns:
- The current size of the pages.
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setMaxpages
Sets how many pages to show.- Parameters:
maxpages
- The amount.
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getSeparator
Get the separator string.- Returns:
- The string set in setSeparator()
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setSeparator
Set the separator string.- Parameters:
separator
- A string which separates the page names.
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doWikiStartTag
This method is allowed to do pretty much whatever he wants. We then catch all mistakes.- Specified by:
doWikiStartTag
in classWikiTagBase
- Throws:
IOException
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