Interface XPathExpression
public interface XPathExpression
The 
XPathExpression interface represents a parsed and resolved
 XPath expression.
 See also the Document Object Model (DOM) Level 3 XPath Specification.
- Since:
- 1.4, DOM Level 3
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Method Summary
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Method Details- 
evaluateEvaluates this XPath expression and returns a result.- Parameters:
- contextNode- The- contextis context node for the evaluation of this XPath expression.If the XPathEvaluator was obtained by casting the- Documentthen this must be owned by the same document and must be a- Document,- Element,- Attribute,- Text,- CDATASection,- Comment,- ProcessingInstruction, or- XPathNamespacenode.If the context node is a- Textor 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.
- type- If a specific- typeis 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.
- result- The- resultspecifies 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.
- Returns:
- The result of the evaluation of the XPath expression.For XPath
   1.0 results, this object will be of type XPathResult.
- Throws:
- XPathException- TYPE_ERR: Raised if the result cannot be converted to return the specified type.
- 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.
 
 
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