Overview > org.w3c.dom.xpath > XPathEvaluator > evaluate
Version 0.1.2 Overview Index Tree Deprecated
org.w3c.dom.xpath.XPathEvaluator.evaluate
method
public evaluate(expression as String, contextNode as Node, resolver as XPathNSResolver, type as Int, result as XPathResult) as XPathResult throws XPathException, DOMException
Description

Evaluates an XPath expression immediately.

Parameters
  • expression XPath expression text.
  • contextNode Context node.
  • resolver Namespace resolver, or `null` when no prefixes are used.
  • type Requested `XPathResult` type.
  • result Reusable result object, or `null`.
Returns

XPath result.

Throws
  • XPathException if expression evaluation or result conversion fails.
  • DOMException if the context node is invalid.
Example
result = evaluator.evaluate("string(//item/@id)", document, null, XPathResult.STRING_TYPE, null)
print(result.stringValue)