Class LangFunction
- All Implemented Interfaces:
Function
4.3 boolean lang(string)
The lang function returns true or false depending on whether the language of the context node as specified by
xml:lang
attributes is the same as or is a sublanguage of the language specified by the argument string. The language of the context node is determined by the value of thexml:lang
attribute on the context node, or, if the context node has noxml:lang
attribute, by the value of thexml:lang
attribute on the nearest ancestor of the context node that has anxml:lang
attribute. If there is no such attribute, then lang returns false. If there is such an attribute, then lang returns true if the attribute value is equal to the argument ignoring case, or if there is some suffix starting with-
such that the attribute value is equal to the argument ignoring that suffix of the attribute value and ignoring case. For example,lang("en")
would return true if the context node is any of these five elements:<para xml:lang="en"/> <div xml:lang="en"><para/></div> <para xml:lang="EN"/> <para xml:lang="en-us"/>
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Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionDetermines whether or not the context node is written in the language specified by the XPath string-value ofargs.get(0)
, as determined by the nearestxml:lang
attribute in scope.private static boolean
private static Boolean
private static boolean
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Field Details
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LANG_LOCALNAME
- See Also:
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XMLNS_URI
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Constructor Details
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LangFunction
public LangFunction()Create a newLangFunction
object.
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Method Details
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call
Determines whether or not the context node is written in the language specified by the XPath string-value of
args.get(0)
, as determined by the nearestxml:lang
attribute in scope.- Specified by:
call
in interfaceFunction
- Parameters:
context
- the context in which to evaluate thelang()
functionargs
- the arguments to the lang function- Returns:
- a
Boolean
indicating whether the context node is written in the specified language - Throws:
FunctionCallException
- ifargs
does not have length one
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isSublang
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