XML/XPath: Difference between revisions

=={{header|Kotlin}}==

<lang scala>// version 1.1.3

import javax.xml.parsers.DocumentBuilderFactory

import org.xml.sax.InputSource

import java.io.StringReader

import javax.xml.xpath.XPathFactory

import javax.xml.xpath.XPathConstants

import org.w3c.dom.Node

import org.w3c.dom.NodeList

val xml =

"""

<inventory title="OmniCorp Store #45x10^3">

<section name="health">

<item upc="123456789" stock="12">

<name>Invisibility Cream</name>

<price>14.50</price>

<description>Makes you invisible</description>

</item>

<item upc="445322344" stock="18">

<name>Levitation Salve</name>

<price>23.99</price>

<description>Levitate yourself for up to 3 hours per application</description>

</item>

</section>

<section name="food">

<item upc="485672034" stock="653">

<name>Blork and Freen Instameal</name>

<price>4.95</price>

<description>A tasty meal in a tablet; just add water</description>

</item>

<item upc="132957764" stock="44">

<name>Grob winglets</name>

<price>3.56</price>

<description>Tender winglets of Grob. Just add water</description>

</item>

</section>

</inventory>

"""

fun main(args: Array<String>) {

val dbFactory = DocumentBuilderFactory.newInstance()

val dBuilder = dbFactory.newDocumentBuilder()

val xmlInput = InputSource(StringReader(xml))

val doc = dBuilder.parse(xmlInput)

val xpFactory = XPathFactory.newInstance()

val xPath = xpFactory.newXPath()

val qNode = xPath.evaluate("/inventory/section/item[1]", doc, XPathConstants.NODE) as Node

val upc = qNode.attributes.getNamedItem("upc")

val stock = qNode.attributes.getNamedItem("stock")

println("For the first item : upc = ${upc.textContent} and stock = ${stock.textContent}")

val qNodes = xPath.evaluate("/inventory/section/item/price", doc, XPathConstants.NODESET) as NodeList

print("\nThe prices of each item are : ")

for (i in 0 until qNodes.length) print("${qNodes.item(i).textContent} ")

println()

val qNodes2 = xPath.evaluate("/inventory/section/item/name", doc, XPathConstants.NODESET) as NodeList

val names = Array<String>(qNodes2.length) { qNodes2.item(it).textContent }

println("\nThe names of each item are as follows :")

println(" ${names.joinToString("\n ")}")

}</lang>

{{out}}

<pre>

For the first item : upc = 123456789 and stock = 12

The prices of each item are : 14.50 23.99 4.95 3.56

The names of each item are as follows :

Invisibility Cream

Levitation Salve

Blork and Freen Instameal

Grob winglets

</pre>