org.jaxen
public class SimpleFunctionContext extends Object implements FunctionContext
FunctionContext
.
This is a simple table-based key-lookup implementation
for FunctionContext
which can be programmatically
extended by registering additional functions.
Field Summary | |
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HashMap | functions Table of functions. |
Constructor Summary | |
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SimpleFunctionContext() Construct an empty function context. |
Method Summary | |
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Function | getFunction(String namespaceURI, String prefix, String localName) |
void | registerFunction(String namespaceURI, String localName, Function function) Register a new function.
|
Construct an empty function context.
By registering a new function, any XPath expression
that utilizes this FunctionContext
may
refer to and use the new function.
Functions may exist either in a namespace or not.
Namespace prefix-to-URI resolution is the responsibility
of a NamespaceContext. Within this FunctionContext
functions are only referenced using the URI, not
the prefix.
The namespace URI of a function may be null
to indicate that it exists without a namespace.
Parameters: namespaceURI the namespace URI of the function to be registered with this context localName the non-prefixed local portion of the function to be registered with this context function a Function implementation object to be used when evaluating the function