org.apache.commons.jelly.xpath
Class XPathComparator

java.lang.Object
  org.apache.commons.jelly.xpath.XPathComparator

All Implemented Interfaces:

java.util.Comparator

public class XPathComparator
extends java.lang.Object
implements java.util.Comparator

Compares xml nodes by extracting the value at xpath and comparing it.

Version:

$Id: XPathComparator.java 1807798 2017-09-08 18:43:34Z chtompki $

Author:

Jason Horman

Nested Class Summary

static class

XPathComparator.XPathSortException My own runtime exception in case something goes wrong with sort.

Field Summary

private boolean	descending Sort descending or ascending
private org.jaxen.XPath	xpath The xpath to use to extract value from nodes to compare

Constructor Summary

XPathComparator()

XPathComparator(org.jaxen.XPath xpath, boolean descending)

Method Summary

int	compare(org.dom4j.Node n1, org.dom4j.Node n2)
int	compare(java.lang.Object o1, java.lang.Object o2)
protected java.lang.Comparable	getComparableValue(java.lang.Object value) Turns the XPath result value into a Comparable object.
org.jaxen.XPath	getXpath()
void	setDescending(boolean descending)
void	setXpath(org.jaxen.XPath xpath)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

equals

Field Detail

xpath

private org.jaxen.XPath xpath

The xpath to use to extract value from nodes to compare

descending

private boolean descending

Sort descending or ascending

Constructor Detail

XPathComparator

public XPathComparator()

XPathComparator

public XPathComparator(org.jaxen.XPath xpath,
                       boolean descending)

Method Detail

setXpath

public void setXpath(org.jaxen.XPath xpath)

getXpath

public org.jaxen.XPath getXpath()

setDescending

public void setDescending(boolean descending)

compare

public int compare(java.lang.Object o1,
                   java.lang.Object o2)

Specified by:

compare in interface java.util.Comparator

compare

public int compare(org.dom4j.Node n1,
                   org.dom4j.Node n2)

getComparableValue

protected java.lang.Comparable getComparableValue(java.lang.Object value)

Turns the XPath result value into a Comparable object.