Evaluates this XPath expression and returns a result.
param
contextNode The context is context node for the
evaluation of this XPath expression.If the XPathEvaluator was
obtained by casting the Document then this must be
owned by the same document and must be a Document,
Element, Attribute, Text,
CDATASection, Comment,
ProcessingInstruction, or XPathNamespace
node.If the context node is a Text or a
CDATASection, then the context is interpreted as the
whole logical text node as seen by XPath, unless the node is empty
in which case it may not serve as the XPath context.
param
type If a specific type is specified, then the
result will be coerced to return the specified type relying on
XPath conversions and fail if the desired coercion is not possible.
This must be one of the type codes of XPathResult.
param
result The result specifies a specific result
object which may be reused and returned by this method. If this is
specified as nullor the implementation does not reuse
the specified result, a new result object will be constructed and
returned.For XPath 1.0 results, this object will be of type
XPathResult.
return
The result of the evaluation of the XPath expression.For XPath
1.0 results, this object will be of type XPathResult.
exception
XPathException
TYPE_ERR: Raised if the result cannot be converted to return the
specified type.
exception
DOMException
WRONG_DOCUMENT_ERR: The Node is from a document that is not supported
by the XPathEvaluator that created this XPathExpression
.
NOT_SUPPORTED_ERR: The Node is not a type permitted as an XPath
context node or the request type is not permitted by this
XPathExpression.
