public WebElement findChildByXpath(WebElement parent, String xpath) {
loggingService.timeMark("findChildByXpath", "begin. Xpath: " + xpath);
String parentInnerHtml = parent.getAttribute("innerHTML"); // Uncomment for debug purpose.
WebElement child = parent.findElement(By.xpath(xpath));
String childInnerHtml = child.getAttribute("innerHTML"); // Uncomment for debug purpose.
return child;
}
The problem with this code is that childInnerHtml gives me wrong result. I scrape numbers and they are equal.
I even suppose that my code is equal to driver.findElement(By.xpath.
Could you tell me whether my comment really finds a child or what to correct?
Child XPath need to be a relative XPath. Normally this means the XPath expression is started with a dot . to make this XPath relative to the node it applied on. I.e. to be relative to the parent node. Otherwise Selenium will search for the given xpath (the parameter you passing to this method) starting from the top of the entire page.
So, if for example, the passed xpath is "//span[#id='myId']" it should be ".//span[#id='myId']".
Alternatevely you can add this dot . inside the parent.findElement(By.xpath(xpath)); line to make it
WebElement child = parent.findElement(By.xpath("." + xpath));
But passing the xpath with the dot is more simple and clean way. Especially if the passed xpath is come complex expression like "(//div[#class='myClass'])[5]//input" - in this case automatically adding a dot before this expression may not work properly.
Related
<xxx1 xmlns="hello">
<xxx2>
<xxx3>
<name>rule_1</name>
</xxx3>
</xxx2>
</xxx1>
I select node by "//*[namespace-uri()='hello']/*[local-name()='name']"
It should get //hello:xxx1/xxx2/xxx3/name , and it does.
Now I try to get element . In reality, I don't know how much parent for <name> will get <xxx1>;
I try this code
node.getParent().getNamespaceURI() = "Hello"
and increase getParent() amount to get <xxx1>
But the first time I call <xxx3>.getNamespaceURI() it returns true.
Is the namespace inherited?
How to get the element has or not has xmlns?
Sorry for my question was not clearly.
I'm trying to get the element which is the first declared namespace "hello".
<xxx1 xmlns="hello">
<xxx2>
<xxx3>
this three node which one is contained xmlns="hello", 'cause <xxx2> and <xxx3> was not declare xmlns in the label.
Hello and Welcome to Stack Overflow!
Yes, namespaces are sort of inherited, but the terminology normally used is that, in your example, the <name> element is in the scope of the namespace declaration xmlns="hello", so the <name>element will be in the hello namespace.
With DOM4J, you can test whether an element is in a namespace or not like this:
boolean hasNamespace(Element e) {
return e.getNamespaceURI().length() > 0;
}
If the element is not in any namespace, getNamespaceURI() returns an empty string.
I guess that you want to select the <name> element, but you don't know at which level it be, i.e. how many parents it will have. You can always use this XPath expression:
Node node = doc.selectSingleNode("//*[namespace-uri() = 'foo' and local-name() = 'name']");
I have the following HTML code:
I need to refer to the span element (last element in the tree) in order to check if it exists.
The problem is, I can't find the right XPath to it and was not able to find any question already concerning this specific issue.
I tried:
"//span[#data-highlighted='true']"
and also further successional XPaths referring to its previous nodes but was not able to actually get a working Xpath. The difficulty for me is that it has no id or title so I tried to get it through its "data-highlighted" but that does not seem to work.
Just for the sake of completeness:
I have written the following Java method which is meant to get an Xpath as its input:
public Boolean webelementIsPresent (String inputXpath) throws InterruptedException {
return driver.findElements(By.xpath(inputXpath)).size()>0;
}
Then in a test class I perform an assertTrue wether the webelement exists (the method returns a True) or wether it doesn't.
I'm open for any help, thanks in advance! :)
To identify the element "//span[#data-highlighted='true']" you can use the following xpath :
"//table[#class='GJBYOXIDAQ']/tbody//tr/td/div[#class='GJBYOXIDPL' and #id='descriptionZoom']/table/tbody/tr/td/div[#class='GJBYOXIDIN zoomable highlight' and #id='description']/div[#class='gwt-HTML' and #id='description']//span[#data-highlighted='true']"
You can get element by text
driver.findElement(By.xpath("//span[contains(text(), 'Willkommen')]"));
Or find div with id and based on that, find span element. There are 2 options to do that:
driver.findElement(By.xpath("//div[#id='description']//span"));
OR
WebElement descriptionDiv = driver.findElement(By.id("description"));
descriptionDiv.findElement(By.tagName("span"));
OR
driver.findElement(By.cssSelector("#description span"));
Your XPath looks fine, my guess is that it's a timing issue and you need a brief wait. It could also be that the page was in a certain state when you captured the HTML and it's not always in that state when you reach the page.
There are other locators that should work here.
XPath
//span[contains(., 'Willkommen')]
CSS selectors (These may or may not work based on your current XPath results)
span[data-highlighted='true']
#description span[data-highlighted='true']
For your function, I would suggest a change. Replace the String parameter with a By for more flexibility. You can then locate an element using any method and not be restricted to just XPath.
public Boolean webElementIsPresent(By locator)
{
return driver.findElements(locator).size() > 0;
}
or if you want to add a wait,
public Boolean webElementIsPresent(By locator)
{
try
{
new WebDriverWait(driver, 5).until(ExpectedConditions.presenceOfElementLocated(locator));
return true;
}
catch (TimeoutException e)
{
return false;
}
}
I'm using the S9API with Saxon 9.7 HE, and I have a NodeInfo object. I need to create an xPath statement that uniquely corresponds to this NodeInfo. It's easy enough to get the prefix, the node name, and the parent:
String prefix = node.getPrefix();
String localPart = node.getLocalPart();
NodeInfo parent = node.getParent();
So I can walk up the tree, building the xPath as I go. But what I can't find is any way to get the positional predicate info. IOW, it's not sufficient to create:
/persons/person/child
because it might match multiple child elements. I need to create:
/persons/person[2]/child[1]
which will match only one child element. Any ideas on how to get the positional predicate info? Or maybe there's a better way to do this altogether?
BTW, for those who use the generic DOM and not the S9API, here's an easy solution to this problem: http://practicalxml.sourceforge.net/apidocs/net/sf/practicalxml/DomUtil.html#getAbsolutePath(org.w3c.dom.Element)
Edit: #Michael Kay's answer works. To add some meat to it:
XPathExpression xPathExpression = xPath.compile("./path()");
List matches = (List) xPathExpression.evaluate(node, XPathConstants.NODESET);
String pathToNode = matches.get(0).toString();
// If you want to remove the expanded QName syntax:
pathToNode = pathToNode.replaceAll("Q\\{.*?\\}", "");
This must be done using the same xPath object that was previously used to acquire the NodeInfo object.
In XPath 3.0 you can use fn:path().
Earlier Saxon releases offer saxon:path().
The challenge here is handling namespaces. fn:path() returns a path that's not sensitive to namespace-prefix bindings by using the new expanded-QName syntax
/Q{}persons/Q{}person[2]/Q{}child[1]
I want to get data from an XPath query:
Element location = (Element) doc.query("//location[location_name='"+ locationName +"']/*").get(0).getDocument().getRootElement();
System.out.println(location.toXML());
Element loc = location.getFirstChildElement("location");
System.out.println(loc.getFirstChildElement("location_name").getValue());
However, no matter what I choose, I always get 1 node (because of .get(0)). I don't know how to select the node which was selected by query.
I found that I should cast the node to Element, (XOM getting attribute from Node?) but the link only shows how to select the first node.
Call getParent() on the first element in the result:
Builder parse = new Builder();
Document xml = parse.build("/var/www/JAVA/toForum.xml");
System.out.println(xml.query("//location[#id=83]/*").get(0).getParent().toXML());
Produces the following output:
<location id="83">
<location_name>name</location_name>
<company_name>company a</company_name>
<machines>
<machine id="12">A</machine>
<machine id="312">B</machine>
</machines>
</location>
The call you make to getDocument() is returning the entirety of the XML document.
The call to query() returns a Nodes object directly containing references to the nodes that you are after.
If you change to
Element location = (Element)doc.query(
"//location[location_name='"+ locationName +"']/*").get(0);
System.out.println(location.getAttribute("location_name").getValue());
it should be ok
EDIT (by extraneon)
Some extra explanation not worthy of an answer by itself:
By doing
Element location =
(Element) doc.query("//location[location_name='"
+ locationName +"']/*").get(0)
.getDocument().getRootElement();
you search through the tree and get the requested node. But then you call getDocument().getRootNode() on the element you want, which will give you the uppermost node of the document.
The above query can thus be simplified to:
Element location = (Element)doc.getRootElement();
which is not wahat you intended.
It's a bit like a bungie jump. You go down to where you need to be (the element) but go immediately back to where you came from (the root element).
It's not clear (at least for me) what actually has to be done. From your query you should get list of nodes matching the given criteria. You will get NodeList and then you can iterate over this NodeList and get content of each node with getNodeValue for example.
Below is my element hierarchy. How to check (using XPath) that AttachedXml element is present under CreditReport of Primary Consumer
<Consumers xmlns="http://xml.mycompany.com/XMLSchema">
<Consumer subjectIdentifier="Primary">
<DataSources>
<Credit>
<CreditReport>
<AttachedXml><![CDATA[ blah blah]]>
Use the boolean() XPath function
The boolean function converts its
argument to a boolean as follows:
a number is true if and only if
it is neither positive or negative
zero nor NaN
a node-set is true if and only if
it is non-empty
a string is true if and only if
its length is non-zero
an object of a type other than
the four basic types is converted to a
boolean in a way that is dependent on
that type
If there is an AttachedXml in the CreditReport of primary Consumer, then it will return true().
boolean(/mc:Consumers
/mc:Consumer[#subjectIdentifier='Primary']
//mc:CreditReport/mc:AttachedXml)
The Saxon documentation, though a little unclear, seems to suggest that the JAXP XPath API will return false when evaluating an XPath expression if no matching nodes are found.
This IBM article mentions a return value of null when no nodes are matched.
You might need to play around with the return types a bit based on this API, but the basic idea is that you just run a normal XPath and check whether the result is a node / false / null / etc.
XPathFactory xpathFactory = XPathFactory.newInstance(NamespaceConstant.OBJECT_MODEL_SAXON);
XPath xpath = xpathFactory.newXPath();
XPathExpression expr = xpath.compile("/Consumers/Consumer/DataSources/Credit/CreditReport/AttachedXml");
Object result = expr.evaluate(doc, XPathConstants.NODE);
if ( result == null ) {
// do something
}
Use:
boolean(/*/*[#subjectIdentifier="Primary"]/*/*/*/*
[name()='AttachedXml'
and
namespace-uri()='http://xml.mycompany.com/XMLSchema'
]
)
Normally when you try to select a node using xpath your xpath-engine will return null or equivalent if the node doesn't exists.
xpath: "/Consumers/Consumer/DataSources/Credit/CreditReport/AttachedXml"
If your using xsl check out this question for an answer:
xpath find if node exists
take look at my example
<tocheading language="EN">
<subj-group>
<subject>Editors Choice</subject>
<subject>creative common</subject>
</subj-group>
</tocheading>
now how to check if creative common is exist
tocheading/subj-group/subject/text() = 'creative common'
hope this help you
If boolean() is not available (the tool I'm using does not) one way to achieve it is:
//SELECT[#id='xpto']/OPTION[not(not(#selected))]
In this case, within the /OPTION, one of the options is the selected one. The "selected" does not have a value... it just exists, while the other OPTION do not have "selected". This achieves the objective.