de.larssh.utils.dom

Class XPathExpressions

java.lang.Object

de.larssh.utils.dom.XPathExpressions

public final class XPathExpressions
extends Object

This class contains helper methods for XPathExpression.

Method Summary

Modifier and Type	Method and Description
static boolean	getBoolean(Node node, XPathExpression expression) Evaluates the compiled XPath expression in the specified context and returns a Boolean.
static <T extends Node> Optional<T>	getNode(Node node, XPathExpression expression) Evaluates the compiled XPath expression in the specified context and optionally returns a Node.
static NodeList	getNodeList(Node node, XPathExpression expression) Evaluates the compiled XPath expression in the specified context and returns a NodeList.
static <T extends Node> List<T>	getNodes(Node node, XPathExpression expression) Evaluates the compiled XPath expression in the specified context and returns a list of Node.
static double	getNumber(Node node, XPathExpression expression) Evaluates the compiled XPath expression in the specified context and returns a Double.
static String	getString(Node node, XPathExpression expression) Evaluates the compiled XPath expression in the specified context and returns a String.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getBoolean

public static boolean getBoolean(Node node,
                                 XPathExpression expression)
                          throws XPathExpressionException

Evaluates the compiled XPath expression in the specified context and returns a Boolean.

Parameters:

node - the starting context

expression - the XPath expression

Returns:

boolean evaluation result

Throws:

XPathExpressionException - If the expression cannot be evaluated.

getNode

public static <T extends Node> Optional<T> getNode(Node node,
                                                   XPathExpression expression)
                                            throws XPathExpressionException

Evaluates the compiled XPath expression in the specified context and optionally returns a Node.

Type Parameters:

T - expected node type

Parameters:

node - the starting context

expression - the XPath expression

Returns:

evaluation result as optional T extends Node

Throws:

XPathExpressionException - If the expression cannot be evaluated.

getNodes

public static <T extends Node> List<T> getNodes(Node node,
                                                XPathExpression expression)
                                         throws XPathExpressionException

Evaluates the compiled XPath expression in the specified context and returns a list of Node.

Type Parameters:

T - expected node type

Parameters:

node - the starting context

expression - the XPath expression

Returns:

evaluation result as list of T extends Node

Throws:

XPathExpressionException - If the expression cannot be evaluated.

getNodeList

public static NodeList getNodeList(Node node,
                                   XPathExpression expression)
                            throws XPathExpressionException

Evaluates the compiled XPath expression in the specified context and returns a NodeList.

Parameters:

node - the starting context

expression - the XPath expression

Returns:

evaluation result as NodeList

Throws:

XPathExpressionException - If the expression cannot be evaluated.

getNumber

public static double getNumber(Node node,
                               XPathExpression expression)
                        throws XPathExpressionException

Evaluates the compiled XPath expression in the specified context and returns a Double.

Parameters:

node - the starting context

expression - the XPath expression

Returns:

evaluation result as Double

Throws:

XPathExpressionException - If the expression cannot be evaluated.

getString

public static String getString(Node node,
                               XPathExpression expression)
                        throws XPathExpressionException

Evaluates the compiled XPath expression in the specified context and returns a String.

Parameters:

node - the starting context

expression - the XPath expression

Returns:

evaluation result as String

Throws:

XPathExpressionException - If the expression cannot be evaluated.