DOMXPathEvaluator

classin packageklyn.io.xml.xpath

public class DOMXPathEvaluator extends Object implements XPathEvaluator:

Object

└ DOMXPathEvaluator

All Implemented Interfaces: XPathEvaluator

Pure Klyn DOM XPath evaluator.

This class implements the DOM Level 3 XPath API surface and evaluates the XPath 1.0 subset currently supported by the Klyn XML library: location paths, attributes, text(), node(), count, string, number, boolean, name, local-name, contains, not, and simple comparisons.

Unsupported XPath syntax raises XPathException.INVALID_EXPRESSION_ERR instead of returning an approximate result.

Example

import klyn.io.xml.dom
import klyn.io.xml.xpath
import org.w3c.dom.xpath

document = DOMParser().parseFromFile("test/klyn/io/xml/Spies.xml")
evaluator = DOMXPathEvaluator()
result = evaluator.evaluate("count(//Spy)", document, null, XPathResult.NUMBER_TYPE, null)
print(result.numberValue)

Properties inherited from Object: type

Constructors

Modifier and Type	Member	Description
public	DOMXPathEvaluator `DOMXPathEvaluator():`	Creates an XPath evaluator.

Methods

Modifier and Type	Member	Description
public	createExpression `createExpression(expression as String, resolver as XPathNSResolver) as XPathExpression throws XPathException, DOMException:`	Compiles an XPath expression.
public	createNSResolver `createNSResolver(nodeResolver as Node) as XPathNSResolver:`	Creates a namespace resolver backed by a DOM node.
public	evaluate `evaluate(expression as String, contextNode as Node, resolver as XPathNSResolver, type as Int, result as XPathResult) as XPathResult throws XPathException, DOMException:`	Evaluates an XPath expression.
public	selectNodes `selectNodes(expression as String, contextNode as Node, resolver as XPathNSResolver = null) as NodeList throws XPathException, DOMException:`	Evaluates an XPath expression and returns the matching nodes as a DOM `NodeList`.
public	selectSingleNode `selectSingleNode(expression as String, contextNode as Node, resolver as XPathNSResolver = null) as Node throws XPathException, DOMException:`	Evaluates an XPath expression and returns its first matching node.

Methods inherited from Object: deepCopy, fromJson, toDict, toJson, toString, toXml

Methods inherited from XPathEvaluator: createExpression, createNSResolver, evaluate