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Return values from xml, xml Iteration

I have an xml file as such
<?xml version="1.0" encoding="UTF-8"?>
<folder name="c">
<folder name="program files">
<folder name="uninstall information" />
</folder>
<folder name="users"/>
</folder>
I want to print out "c", "program files", "uninstall information" and "users" what i finally want to do is to print out only values of the name attribute with string starting from u , therefore users and uninsall information.
But i have not been able to print all the values out,
Below is my code where you can see i have tried to ways but no success so far.
public static Collection<String> folderNames(String xml, char startingLetter) throws Exception {
DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
try {
DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
FileInputStream fis = new FileInputStream("src/main/resources/test.xml");
org.xml.sax.InputSource is = new InputSource(fis);
Document doc = documentBuilder.parse(is);
NodeList nodeList = doc.getElementsByTagName("*");
for(int i =0; i < nodeList.getLength(); i++) {
Node node = nodeList.item(i);
/// Tried this
if(node.getNodeType() == Node.ELEMENT_NODE) {
String value = node.getTextContent();
System.out.println("value:::" +value);
}
/// tried this
// Element element = (Element)nodeList.item(i);
// NamedNodeMap attributes = element.getAttributes();
// Node nodeValue1 = nodeList.item(i);
// System.out.println(nodeValue1.getAttributes().item(i));
}
} catch (Exception e) {
e.getMessage();
}
return Collections.EMPTY_LIST;
}
for speedy test my imported classes looks like test
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
My approach without using getElementByTagsName
Document doc = documentBuilder.parse(is);
NodeList nodeList = doc.getElementsByTagName("folder");
for(int i =0; i < nodeList.getLength(); i++) {
if (nodeList.item(i).hasChildNodes()) {
for(int i1 = 0; i1 < nodeList.item(i).getChildNodes().getLength(); i1++) {
Node node = nodeList.item(i).getChildNodes().item(i);
System.out.println(node.getAttributes().item(i));
}
}
Node nodeValue1 = nodeList.item(i);
System.out.println(nodeValue1.getAttributes().item(i));
This isnt complete but it will require a recursive call, due to hierarchy in the xml

Example of printing all folder names starting with u:
String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
"<folder name=\"c\">\n" +
" <folder name=\"program files\">\n" +
" <folder name=\"uninstall information\" />\n" +
" </folder>\n" +
" <folder name=\"users\"/>\n" +
"</folder>";
DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
Document doc = documentBuilder.parse(new InputSource(new StringReader(xml)));
NodeList nodeList = doc.getElementsByTagName("folder");
for (int i = 0; i < nodeList.getLength(); i++) {
Element element = (Element) nodeList.item(i);
String name = element.getAttribute("name");
if (name.startsWith("u"))
System.out.println(name);
}
Output
uninstall information
users

You almost had it. First you have to identify the XML element, which you did.
if(node.getNodeType() == Node.ELEMENT_NODE) {
String value = node.getTextContent();
System.out.println("value:::" +value);
}
but instead of getting invoking getTextContent(), you need to find the attribute in that element. Some variation of the below. Of course, if there is more than one attribute you will need to accomodate looking at them all (using node.getAttributes().getLength()):
if(node.getNodeType() == Node.ELEMENT_NODE) {
if (node.getAttributes() != null) {
String name = node.getAttributes().item(0).getNodeName();
String value = node.getAttributes().item(0).getNodeValue();
System.out.println("attribute name:::" +name + " value:::" +value);
}
}

XML parsing to Java - getting root attribute value

I'm having a slight problem with XML parsing.
I'm creating a function where the parameter is a certain "element" from the XML file.
When found, I want to return the value of the root attribute.
Here's my code:
FileInputStream file = new FileInputStream(new File("C:\\Users\\Grizzly\\Java\\Projet_16_17-20161214\\bdd.xml"));
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document doc = builder.parse(file);
doc.getDocumentElement().normalize();
NodeList nList = doc.getElementsByTagName("type");
for (int temp = 0; temp < nList.getLength(); temp++)
{
Node nNode = nList.item(temp);
if(nNode.toString().equalsIgnoreCase(element))
{
Element eElement = (Element) nNode;
System.out.println("Taxe= "+ eElement.getAttribute("taxe"));
}
}
}
Any idea on how to do this?
Here's my XML file:
<?xml version="1.0"?>
-<types>
-<type id="Nourriture" taxe="0.1">
<element>pomme</element>
<element>fraise</element>
<element>fromage</element>
<element>viande rouge </element>
</type>
-<type id="Matiere Premiere" taxe="0.2">
<element>fer</element>
<element>polypropylene</element>
</type>
-<type id="Element Solide" taxe="0.3">
<element>voiture</element>
<element>planche surf</element>
<element>pistolet</element>
</type>
</types>
In my code, I tried to get the elements of a certain node from the nodelist and then compare it to the the string "element" which is the input of the user, and if they match it will check the attribute value of taxe linked to it.
Thanks in advance.
EDIT: I'm getting closer to what I need:
NodeList nList = doc.getElementsByTagName("type");
for (int temp = 0; temp < nList.getLength(); temp++)
{
Node nNode = nList.item(temp);
NodeList nChildren = nNode.getChildNodes();
Element eElement = (Element) nNode;
for(int i = 0; i < nChildren.getLength(); i++)
{
String onElement = eElement.getElementsByTagName("element").item(i).getTextContent();
if(onElement.equalsIgnoreCase(element))
{
System.out.println("id : " + eElement.getAttribute("id"));
System.out.println("taxe : " + eElement.getAttribute("taxe"));
break;
}
}
}
But it's only reading the first element... and item(i) isn't working.
Any idea?

If I understand you correctly, you are trying to fetch specific attributes (id and taxe) of all the document nodes having at least one child element with specific name (element).
Although the problem can be solved by iterating the DOM and keeping the states, I would rather delegate this task to XPath. A code with XPath will look cleaner and be more maintainable. For example, in order to fetch all elements having attributes id and taxe and a child element element you can use an XPath expression like //*[#id and #taxe element]. The matching nodes are fetched in a single line. You can simply iterate the nodes and collect the attributes as shown in the following example.
Example
public static void main(String args[]) {
String element = args.length > 0 ? args[0] : "element";
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
try {
DocumentBuilder builder = factory.newDocumentBuilder();
FileInputStream file = new FileInputStream(new File("/some/file.xml"));
Document doc = builder.parse(file);
XPath xPath = XPathFactory.newInstance().newXPath();
String expression = "//*[#id and #taxe and " + element + "]";
NodeList nodeList = (NodeList) xPath.compile(expression)
.evaluate(doc, XPathConstants.NODESET);
for (int i = 0; i < nodeList.getLength(); i++) {
Node node = nodeList.item(i);
NamedNodeMap attributes = node.getAttributes();
for (int j = 0; j < attributes.getLength(); j++) {
Node aNode = attributes.item(j);
System.out.printf(
"%s: %s\n",
aNode.getNodeName(),
aNode.getNodeValue()
);
}
}
} catch (Exception e) {
System.err.println(e.getMessage());
System.exit(1);
}
}
Sample Output
id: Nourriture
taxe: 0.1
id: Matiere Premiere
taxe: 0.2
id: Element Solide
taxe: 0.3
Note, the sample above prints all attributes of the parent element. If you want to print only specific ones, you can, obviously, add a trivial check like this:
String aName = aNode.getNodeName();
if (aName.equals("taxe")) { // ...
But you can actually filter out the attributes with XPath:
String expression = "//*[ " + element + "]/#*[name() = 'id' or name() = 'taxe']";
NodeList nodeList = (NodeList) xPath.compile(expression)
.evaluate(doc, XPathConstants.NODESET);
for (int i = 0; i < nodeList.getLength(); i++) {
Node node = nodeList.item(i);
System.out.printf("%s: %s\n", node.getNodeName(), node.getNodeValue());
}
The XPath expression above fetches all attribute nodes having names equal to whether id, or taxe. If you want all attributes, simply remove the last condition:
String expression = "//*[ " + element + "]/#*";

how to read returned map values using key names outside a method - java

I am working on a selenium java script which would read data from an xml file. I have a read function which reads data from xml file and writes in to a map and that map data is returned.See below
public Map<String, String> read() throws ParserConfigurationException, IOException, SAXException {
Map<String, String> testData = new HashMap<String, String>();
File fXmlFile = new File("src/test/java/Blocks.xml");
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(fXmlFile);
doc.getDocumentElement().normalize();
NodeList nList = doc.getElementsByTagName("blocks");
System.out.println("----------------------------");
for (int temp = 0; temp < nList.getLength(); temp++) {
Node nNode = nList.item(temp);
System.out.println("\nCurrent Element :" + nNode.getNodeName());
if (nNode.getNodeType() == Node.ELEMENT_NODE) {
Element eElement = (Element) nNode;
NodeList childEls = eElement.getElementsByTagName("*");
for (int i = 0; i < childEls.getLength(); i++) {
Element cElement = (Element) childEls.item(i);
String name = cElement.getTagName();
String value = cElement.getTextContent();
value = System.getProperty("qa." + name, value);
testData.put(name, value);
}
}
System.out.println("array" + testData);
}
return testData;
}
Now i am not sure how to access values in the map outside read function - my xml file has url, username, password and 30+ rows of application data.
I can access values inside the read function but not sure how to do it outside the read function.
Any help would be appreciated. Thanks!

XML attribute Parsing

When parsing the xml, I want to retrieve the token value:
PCWTJ87OXNnGhwzvzqvbhepi2qQM6PhMdNHn7V9UuVw|
But I am currently getting the related:
Found attribute: expiry with value: 2014-10-29T22:20:00Z
xml file:
<?xml version="1.0"?>
<Inrix responseId="63448807-78d3-4ee8-90d6-a8b64abff8fc" statusText="" statusId="0" createdDate="2014-10-29T21:21:55Z" versionNumber="5.4" copyright="Copyright INRIX Inc." docType="GetSecurityToken">
<AuthResponse>
<AuthToken expiry="2014-10-29T22:20:00Z">PCWTJ87OXNnGhwzvzqvbhepi2qQM6PhMdNHn7V9UuVw|</AuthToken>
<ServerPath>devzone.inrix.com/traffic/inrix.ashx</ServerPath>
<ServerPaths>
<ServerPath region="NA" type="API">http://na.api.inrix.com/Traffic/Inrix.ashx</ServerPath>
<ServerPath region="NA" type="TTS">http://na-rseg-tts.inrix.com/RsegTiles/tile.ashx</ServerPath>
</ServerPaths>
</AuthResponse>
</Inrix>
This is the code I wrote to parse the xml file above:
DocumentBuilderFactory factory =DocumentBuilderFactory.newInstance();
DocumentBuilder builder =factory.newDocumentBuilder();
Document document = builder.parse(new File(inputfile));
document.getDocumentElement().normalize();
NodeList AuthTokens = document.getElementsByTagName("AuthToken");
//NodeList AuthTokens = document.getElementsByTagName("ServerPath");
int num = AuthTokens.getLength();
for (int i=0; i<num;i++){
Element node = (Element) AuthTokens.item(i);
NamedNodeMap attributes = node.getAttributes();
int numAttrs = attributes.getLength();
for (int j=0; j<numAttrs;j++){
Attr attr = (Attr) attributes.item(j);
String attrName = attr.getNodeName();
String attrValue = attr.getNodeValue();
System.out.println(attr.getParentNode());
System.out.println("Found attribute: " + attrName + " with value: " + attrValue);
}
}
How do I get the correct value?

I believe you want the contents of the node, not its' attributes. Change your Element to Node and then you can call Node.getTextContent()
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(new File(inputfile));
document.getDocumentElement().normalize();
NodeList AuthTokens = document.getElementsByTagName("AuthToken");
// NodeList AuthTokens = document.getElementsByTagName("ServerPath");
int num = AuthTokens.getLength();
for (int i = 0; i < num; i++) {
Node node = AuthTokens.item(i);
String token = node.getTextContent();
System.out.println(token);
}
Output is (as requested)
PCWTJ87OXNnGhwzvzqvbhepi2qQM6PhMdNHn7V9UuVw|

get data within a processing instruction tag in xml

here's my code :
void validate(String fileLocation){
try{
DocumentBuilderFactory factory= DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(new File(fileLocation));
String[] pageContent=new String[100];
for (int i = 0; i < pageContent.length; i++) {
String currentPageContent= document.getElementsByTagName("?PG").item(i).getTextContent();
System.out.println("the Current Page content is "+currentPageContent);
pageContent[i]=currentPageContent;
}
}catch(Exception e){
e.printStackTrace();
}
}
i have several tags as < ?PG 1 ?> , < ?PG 2 ?>,< ?PG 3 ?> denoting page numbers how can i get get the data from page tag.

You can use recursion to go over the your xml without messy nested for loops.
You can compare the Node type to be PROCESSING_INSTRUCTION_NODE and extract its contents.
Example xml:
<?xml version="1.0" encoding="UTF-8" ?>
<test>
<ID>Test1</ID>
<TestType name="abc">
<AddressRange start="0x00000000" end="0x0018ffff" />
</TestType >
<TestType name="RAM">
<AddressRange start="0x00400000" end="0x00407fff" />
</TestType >
<?PITarget PIContent?>
<?PISource PISome?>
</test>
Code:
public static void main(String[] args) throws ParserConfigurationException,
SAXException, IOException {
FileInputStream path = new FileInputStream("text.xml");
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(path);
System.out.println();
traverse(document.getDocumentElement());
}
public static void traverse(Node node) {
NodeList list = node.getChildNodes();
for (int i = 0; i < list.getLength(); i++) {
Node currentNode = list.item(i);
traverse(currentNode);
}
if (node.getNodeType() == Node.PROCESSING_INSTRUCTION_NODE) {
System.out.println("This -> " + node.getTextContent());
}
}
Gives,
This -> PIContent
This -> PISome

If you want to read Processing Instructions in your code than you should do something like this:
NodeList currentPageContent= document.getChildNodes();
for (int i = 0; i < currentPageContent.getLength(); i++) {
Node node = currentPageContent.item(i);
if(node.getNodeType()==Node.PROCESSING_INSTRUCTION_NODE)
System.out.println("the Current Page content is "+ node.getNodeType()+ " : " + node.getNodeName() + " : " + node.getTextContent());
}
Hope this helps.

Processing instructions are exposed in the DOM(Document Object Model) as Node.PROCESSING_INSTRUCTION_NODE.