I have a XML file with this format:
<object>
<origin>1:1:1</origin>
<normal>2:2:2</normal>
<leafs>
<object>
<origin>1:1:1</origin>
<normal>3:3:3</normal>
<leafs>none</leafs>
</object>
</leafs>
</object>
How could I retrieve the value "none" of element <leafs> on second level of the tree? I used this
XPathExpression expLeafs = xpath.compile("*[name()='leafs']");
Object resLeafs = expLeafs.evaluate(node, XPathConstants.NODESET);
NodeList leafsList = (NodeList) resLeafs;
if (!leafsList.item(0).getFirstChild().getNodeValue().equals("none"))
more code...
but it doesn't work because there are some empty text nodes bofore and after "none". Is there a way to deal with it like xpath.compile("*[value()='none']")?
I just ran a simple test program using your XML file and
expr = xpath.compile("/object/leafs/object/leafs/text()");
and got the desired "none" result. If you have additional requirements, you'll have to edit your question.
After a checking the code line #Lord Torgamus provided i managed to parse the document as i needed like this:
XPathExpression expLeafs = xpath.compile("*[name()='leafs']");
Object resLeafs = expLeafs.evaluate(node, XPathConstants.NODESET);
NodeList leafsList = (NodeList) resLeafs;
Node nd = leafsList.item(0);
XPathExpression expr = xpath.compile("text()");
Object resultObj = expr.evaluate(nd, XPathConstants.NODE);
String str = expr.evaluate(nd).trim();
System.out.println(str);
and the output is "none" with no other empty text node.
Related
I'm trying to get to the content of STRING-VALUE where comparator has VALUE = item.auxiliaryData.productRef.brandName
I tried to use the following code,
XPathExpression expr = xpath.compile
("//comparator[contains(VALUE,'item.auxiliaryData.productRef.ancestorCategoryIds')]//STRING-VALUE");
productRefs = (NodeList) expr.evaluate(doc, XPathConstants.NODESET);
This is what I'm trying to parse
<comparator NAME="equals">
<VALUE>item.auxiliaryData.productRef.brandName</VALUE>
<CONSTANT>
<DATA-TYPE>java.lang.STRING</DATA-TYPE>
<STRING-VALUE>Ariat</STRING-VALUE>
</CONSTANT>
</comparator>
<comparator NAME="equals">
<VALUE>item.auxiliaryData.productRef.ID</VALUE>
<CONSTANT>
<DATA-TYPE>java.util.Collection</DATA-TYPE>
<STRING-VALUE>84332</STRING-VALUE>
<STRING-VALUE>79904</STRING-VALUE>
<STRING-VALUE>82203</STRING-VALUE>
</CONSTANT>
</comparator>
This XPath,
string(//comparator[VALUE='item.auxiliaryData.productRef.brandName']//STRING-VALUE)
will return "Ariat" directly as requested.
Your xpath needs to be corrected :
//comparator[contains(VALUE,'item.auxiliaryData.productRef.brandName')]//STRING-VALUE
You were using item.auxiliaryData.productRef.ancestorCategoryIds
below are the xml file
<priority-claims>
<priority-claim sequence="1" kind="national">
<document-id document-id-type="maindoc">
<doc-number>FD0297663</doc-number>
<date>20070403</date>
</document-id>
</priority-claim>
<priority-claim sequence="2" kind="national">
<document-id document-id-type="maindoc">
<doc-number>FD0745459P</doc-number>
<date>20060424</date>
</document-id>
</priority-claim>
</priority-claims>
my expected conditions:
1.How can i getting all the node value (i.e FD0297663, 20070403 and FD0745459P,20060424)
2.its may be single (i.e Priority -claim tag) or more than a single level is possible
my existing code getting first level value only
String priorityNumber = xPath.compile("//priority-claim//doc-number").evaluate(xmlDocument);
String priorityDate = xPath.compile("//priority-claim//date").evaluate(xmlDocument);
Below is a working example:
updated the xpath expressions (e.g, /priority-claims/priority-claim/document-id/doc-number/text())
using NodeList
NodeList priorityNumbers = (NodeList) xPath.compile("/priority-claims/priority-claim/document-id/doc-number/text()").evaluate(xmlDocument, XPathConstants.NODESET);
NodeList priorityDates = (NodeList) xPath.compile("/priority-claims/priority-claim/document-id/date/text()").evaluate(xmlDocument,XPathConstants.NODESET);
for(int i=0; i<priorityNumbers.getLength();i++){
System.out.println(priorityNumbers.item(i).getNodeValue());
}
for(int i=0; i<priorityDates.getLength();i++){
System.out.println(priorityDates.item(i).getNodeValue());
}
Here is a linkt to a gist with a runnable version: https://gist.github.com/rparree/1c7eb8e9ca928b98418fdb167a2096a3
How I can extract value Total topics?
<?xml version="1.0"?>
<config>
<command param = "Total topics" > Check title
</command>
</config>
I know that for extracting value of Check title I need such code:
XPathExpression expr = xpath.compile("//command/text()");
Object result = expr.evaluate(doc, XPathConstants.NODESET);
Help me with param, please.
XPathExpression expr = xpath.compile("//command[#param]/text()");
Object result = expr.evaluate(doc, XPathConstants.NODESET);
I've not compiled it but to select an attribute you'll need to used #attributeName after the node is selected.
How about using # for attribute? Try with
XPathExpression expr = xpath.compile("//command/#param");
I've got a section of XML that looks like this:
<entry>
<id>tag:example.com,2005:Release/343597</id>
<published>2012-04-10T11:29:19Z</published>
<updated>2012-04-10T12:04:41Z</updated>
<link type="text/html" href="http://example.com/projects/example1" rel="alternate"/>
<title>example1</title>
</entry>
I need to grab the link http://example.com/projects/example1 from this block. I'm not sure how to do this. To get the title of the project I use this code:
String title1 = children.item(9).getFirstChild().getNodeValue();
where children is the getChildNodes() object for the <entry> </entry> block. But I keep getting NullPointerExceptions when I try to get the node value for the <link> node in a similar way. I see that the XML code is different for the <link> node, and I'm not sure what it's value is.... Please advise!
The xpath expression to get that node is
//entry/link/#href
In java you can write
Document doc = ... // your XML document
XPathExpression xp = XPathFactory.newInstance().newXPath().compile("//entry/link/#href");
String href = xp.evaluate(doc);
Then if you need to get the link value of the entry with a specific id you can change the xpath expression to
//entry[id='tag:example.com,2005:Release/343597']/link/#href
Finally if you want to get all the links in the documents, if the document has many entry elements you can write
Document doc = ... // your XML document
XPathExpression xp = XPathFactory.newInstance().newXPath().compile("//entry/link/#href");
NodeList links = (NodeList) xp.evaluate(doc, XPathConstants.NODESET);
// and iterate on links
Here is the complete code:
DocumentBuilderFactory domFactory = DocumentBuilderFactory
.newInstance();
domFactory.setNamespaceAware(true);
DocumentBuilder builder = domFactory.newDocumentBuilder();
Document doc = builder.parse("test.xml");
XPath xpath = XPathFactory.newInstance().newXPath();
XPathExpression expr = xpath.compile("//entry/link/#href");
Object result = expr.evaluate(doc, XPathConstants.NODESET);
NodeList nodes = (NodeList) result;
for (int i = 0; i < nodes.getLength(); i++) {
System.out.println(nodes.item(i));
}
I'm using Java's DOM parser to parse an XML file.
let's say I have the following XML
<?xml version="1.0"?>
<config>
<dotcms>
<endPoint>ip</endPoint>
</dotcms>
</config>
</xml>
I like to get the value of 'endPoint'. I can do it with the following code snippet. (assuming that I already parsed it with DocumentBuilder)
NodeList nodeList = this.doc.getElementByTagName("dotcms");
Node nValue = (Node) nodeList.item(0);
return nValue.getNodeValue();
Is it possible to get a value of a field by a field's name? Like....
Node nValue = nodeList.getByName("endPoint") something like this...?
You should use XPath for these sorts of tasks:
//endPoint/text()
or:
/config/dotcms/endPoint/text()
Of course Java has a built-in support for XPath:
XPath xpath = XPathFactory.newInstance().newXPath();
XPathExpression expr = xpath.compile("//endPoint/text()");
Object value = expr.evaluate(doc, XPathConstants.STRING);
You could also use jOOX, a jquery-like DOM wrapper, to write even less code:
// Using css-style selectors
String text1 = $(document).find("endPoint").text();
// Using XPath
String text2 = $(document).xpath("//endPoint").text();