Class LangFunction
- java.lang.Object
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- org.jaxen.function.LangFunction
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- All Implemented Interfaces:
Function
public class LangFunction extends java.lang.Object implements 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"/>
- Author:
- Attila Szegedi (szegedia @ freemail.hu)
- See Also:
- XPath Specification
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Constructor Summary
Constructors Constructor Description LangFunction()
Create a newLangFunction
object.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.Object
call(Context context, java.util.List args)
Determines 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.
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Method Detail
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call
public java.lang.Object call(Context context, java.util.List args) throws FunctionCallException
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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