Read child nodes with same name using StAX

StackOverflow https://stackoverflow.com/questions/22647709

Question

While trying to read XML file using StAX I came across this problem.

In an XML file (essentially its an XLIFF file), I have child nodes with the same name. I couldn't quite figure out how to read these duplicate nodes.

Below is the part of code that I am trying on, and an example of the XLIFF file as well

This is only the working part of the code.

Java Code:

   // Initialize ArrayList to return
    ArrayList<SourceCollection> xmlData = new ArrayList<>();
    boolean isSource = false;
    boolean isTrans = false;
    boolean isContext = false;
    // Setting Up Data Class
    SourceCollection srcData = null;
   // Start StAX XLIFF reader
    XMLInputFactory xmlInputFactory = XMLInputFactory.newInstance();
    try {
        XMLStreamReader xmlStreamReader = xmlInputFactory.createXMLStreamReader(inStream);
        int event = xmlStreamReader.getEventType();
        while (true) {
            switch (event) {
                case XMLStreamConstants.START_ELEMENT:                            
                    switch (xmlStreamReader.getLocalName()) {
                        case "group":
                            // Create SourceCollection Object
                            srcData = new SourceCollection();
                            srcData.setID(xmlStreamReader.getAttributeValue(0));
                            break;
                        case "source":
                            isSource = true;
                            break;
                        case "target":
                            isTarget = true;
                            break;
                        case "context":
                            isContext = true;
                            break;
                        default:
                            isSource = false;
                            isTarget = false;
                            isContext = false;
                            break;
                    }
                    break;
                case XMLStreamConstants.CHARACTERS:
                    if (srcData != null) {
                        String srcTrns = xmlStreamReader.getText();
                        if (!Utility.isStringNullOrEmptyOrWhiteSpace(srcTrns)) {
                            if (isSource) {
                                srcData.setSource(srcTrns);
                                isSource = false;
                            } else if (isTarget) {
                                srcData.setTarget(srcTrns);
                                isTarget = false;
                            }
                        }
                    }
                    break;
                case XMLStreamConstants.END_ELEMENT:
                    if (xmlStreamReader.getLocalName().equals("group")) {
                        xmlData.add(srcData);
                    }
                    break;
            }
            if (!xmlStreamReader.hasNext()) {
                break;
            }
            event = xmlStreamReader.next();
        }
    } catch (XMLStreamException ex) {
        LOG.log(Level.WARNING, ex.getMessage(), MessageFormat.format("{0} {1}", ex.getCause(), ex.getLocation()));
    }

XLIFF file sample:

<XLIFF>
<xliff version="1.2" xmlns="urn:oasis:names:tc:xliff:document:1.2" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <file datatype="xml">
    <body>
      <group id="25032014">
        <context-group>
          <context context-type="sub1">xxxx</context>
          <context context-type="sub2">yyyy</context>
          <context context-type="sub3"/>
        </context-group>
        <target-unit>
          <source>ABC</source>
          <target>ABC</target>
        </target-unit>
      </group>
    </body>
  </file>
</xliff>
</XLIFF>

Of course, this is a modified XLIFF file, but structure is exactly the same as original.

Any sample or suggestions would be helpful.

Was it helpful?

Solution

But you already process these duplicates. I modified your code a little like

        switch (event) {
            case XMLStreamConstants.START_ELEMENT:   
                System.out.println(xmlStreamReader.getLocalName());
                switch (xmlStreamReader.getLocalName()) {

and the System.out delivers:

XLIFF
xliff
file
body
group
context-group
context
context
context
target-unit
source
target

You see the multiple context outputs. Now you have to adapt your data structure to hold lists of context elements and not only one.

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