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iceberg4uiceberg4u 

Getting null in XMLStreamReader while reading attribute

public void parseXML(XmlStreamReader xsr)
    {
       
        while(xsr.hasNext())
        {
            if (xsr.getEventType() == XmlTag.START_ELEMENT)
            {   
                if ('body' == xsr.getLocalName())
                {   
                    m_xmlValue += '-' + '   ' + parseRoot(xsr);
                   // parseRoot(xsr);
                }
            }   
               xsr.next();
        }
       
    }
    public String parseRoot(XmlStreamReader xsr)
    {
        String value ='';
       
        value += '---> ' + xsr.getAttributeValue('', 'chapter');
        System.debug('The value of chapter is ::'+value);
       
        while(xsr.hasNext())
        {
            if (xsr.getEventType() == XmlTag.END_ELEMENT)
            {
                   break;
            }
            else if (xsr.getEventType() == XmlTag.CHARACTERS)
            {
                   value += xsr.getText();
            }
            xsr.next();
         }
       
        return value;
    }
    public TestGoogleAppController()
    {      
        try
        {    
            //TestGoogleAppController tstGoogleApp = new TestGoogleAppController();
            m_xmlValue = '';
            //Playing with XML
            //String xml = '<root><body chapter="1">Hello Peace</body><body chapter="2">Sumiran</body><body chapter="3">How</body></root>';
            String xml = '<body chapter="1">Hello Peace</body>';
            XmlStreamReader xsr = new XmlStreamReader(xml); 
            parseXML(xsr);

}

}

 

 

Guys, I have been stuck on this problem since morning.So please help out.

 

I am try to read the xml.I can read the values present between tags but I get "null" while reading attributes.Please could you point me in the right direction

 

Best Answer chosen by Admin (Salesforce Developers) 
TheMythicalTheMythical

I also followed the apex developer's guide using 'value += '---> ' + xsr.getAttributeValue('', 'chapter');', but it only returns null. Then I found out a better approach by loop through the start tags, try to find out all attributs' values in that tag:

 

 

for (Integer i = 0; i < reader.getAttributeCount(); i ++) {
     if (reader.getAttributeLocalName(i).equals('chapter')) {
         value = reader.getAttributeValueAt(i);
     } else if (reader.getAttributeLocalName(i).equals('XXX')) {
         put your logic here.
     }
}
 
 
 
 In this way, you will get the attribute's value instead of null. 
 


All Answers
TheMythicalTheMythical
I also followed the apex developer's guide  using 'value += '---> ' + xsr.getAttributeValue('', 'chapter');', but it only returns null. Then I found out a better approach by loop through the start tags, try to find out all attributs' values in that tag:
 
 
for (Integer i = 0; i < reader.getAttributeCount(); i ++) {
     if (reader.getAttributeLocalName(i).equals('chapter')) {
         value = reader.getAttributeValueAt(i);
     } else if (reader.getAttributeLocalName(i).equals('XXX')) {
         put your logic here.
     }
}
 
 
 
 In this way, you will get the attribute's value instead of null. 
 
This was selected as the best answer
ConejoConejo
fwiw, I found the correct answer in this post: here
 
Pass null instead of '' for the first parameter ( reader.getAttributeValue(null,'author'); ) 
 
 
SalesForce Admins & Documentation guys: It would be _nice_ if you fixed the example in the Apex Reference for the XmlStreamReader class!
 
Thanks,
 
Rich C. 


hattihatti
@


chantspelchantspel
Thanks for posting this solution it was driving me nuts. Salesforce should really update their documentation...