public class XPathFunctionLibrary extends java.lang.Object implements FunctionLibrary
Constructor and Description |
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XPathFunctionLibrary()
Construct a XPathFunctionLibrary
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Modifier and Type | Method and Description |
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Expression |
bind(SymbolicName.F functionName,
Expression[] staticArgs,
StaticContext env)
Bind a function, given the URI and local parts of the function name,
and the list of expressions supplied as arguments.
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FunctionLibrary |
copy()
This method creates a copy of a FunctionLibrary: if the original FunctionLibrary allows
new functions to be added, then additions to this copy will not affect the original, or
vice versa.
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Function |
getFunctionItem(SymbolicName.F symbolicName,
StaticContext staticContext)
Test whether a function with a given name and arity is available; if so, return a function
item that can be dynamically called.
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javax.xml.xpath.XPathFunctionResolver |
getXPathFunctionResolver()
Get the resolver
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boolean |
isAvailable(SymbolicName.F functionName)
Test whether a function with a given name and arity is available
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void |
setXPathFunctionResolver(javax.xml.xpath.XPathFunctionResolver resolver)
Set the resolver
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public XPathFunctionLibrary()
public void setXPathFunctionResolver(javax.xml.xpath.XPathFunctionResolver resolver)
resolver
- The XPathFunctionResolver wrapped by this FunctionLibrarypublic javax.xml.xpath.XPathFunctionResolver getXPathFunctionResolver()
public Expression bind(SymbolicName.F functionName, Expression[] staticArgs, StaticContext env) throws XPathException
bind
in interface FunctionLibrary
functionName
- The name of the functionstaticArgs
- The expressions supplied statically in the function call. The intention is
that the static type of the arguments (obtainable via getItemType() and getCardinality() may
be used as part of the binding algorithm.env
- The static contextXPathException
- if a function is found with the required name and arity, but
the implementation of the function cannot be loaded or used; or if an error occurs
while searching for the function.public Function getFunctionItem(SymbolicName.F symbolicName, StaticContext staticContext) throws XPathException
This supports the function-lookup() function in XPath 3.0.
getFunctionItem
in interface FunctionLibrary
symbolicName
- the qualified name of the function being calledstaticContext
- the static context to be used by the function, in the event that
it is a system function with dependencies on the static contextXPathException
- in the event of certain errors, for example attempting to get a function
that is privatepublic boolean isAvailable(SymbolicName.F functionName)
This supports the function-available() function in XSLT.
isAvailable
in interface FunctionLibrary
functionName
- the qualified name of the function being calledpublic FunctionLibrary copy()
copy
in interface FunctionLibrary
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