XMLStreamReader - Strange error

I have the following XML code

    <class name="ContentStreamer">
        <method name="sendAudio">
            <criteria>medium</criteria>
        </method>
        <method name="sendVideo">
            <criteria>weak</criteria>
        </method>
    </class>

I iterate over it with the following code (using XMLStreamReader)

if (reader.getEventType() == XMLStreamReader.START_ELEMENT) {
    String elementName = reader.getName().toString();
    if (elementName.equalsIgnoreCase("class")) {
        // get the class name and construct a Class
        classComposition = new ClassComposition();
        classComposition.setName(reader.getAttributeValue(0));
        System.out.println("***** Class: " + reader.getAttributeValue(0));
    } 
    else if (elementName.equalsIgnoreCase("method")) {
        MethodCriterion method = new MethodCriterion();
        method.setMethodName(reader.getAttributeValue(0));  
        System.out.println("***** Method: " + reader.getAttributeValue(0));
        // move forward and get the text from the '<criteria>' element
        reader.next();
        System.out.println("!!!" + reader.getName().toString());
    }
    else if (elementName.equalsIgnoreCase("criterion")) {
        return compositions;
    }
}

The output I get on the console is:

***** Class: ContentStreamer
***** Method: sendAudio
There was an error parsing the composition file
java.lang.IllegalStateException: Illegal to call getName() when event type is CHARACTERS. Valid states are START_ELEMENT, END_ELEMENT
    at com.sun.org.apache.xerces.internal.impl.XMLStreamReaderImpl.getName(Unknown Source)

The area of the code that is giving me trouble is the last 'reader.next()' and 'System.out.println'. I have replaced the 'reader.getName().toString()' with 'reader.getElementText()' as the '<criteria>' element is a text element only and the API says that this methods reads the text of a 'text-only element' (to quote). I have checked the event type using 'reader.getEventType()' and it returns a 4, which corresponds to开发者_如何转开发 'CHARACTERS'. So in that case, I tried 'reader.getText()' and this just returns an empty string. I'm using Java 6. Any ideas what's going on here?

Between <method name="sendAudio"> and <criteria>medium</criteria>, you have a newline char and a number of spaces. These form a text node, and that's why you get CHARACTERS as the event type.

I'm surprised you got an empty string when calling getText(). Are you sure it wasn't a string with only a newline and space characters?