java - Can not unmarshall the SOAP response

Question

I could send a request and receive the response but I can not parse the response. It returns the following error:

Local Name:Body
error is here
java.lang.NullPointerException
    at com.ticketmaster.ticketmaster.TicketMaster.Search(TicketMaster.java:119)
    at com.ticketmaster.ticketmaster.App.main(App.java:12)

Code

    SOAPMessage response
            = connection.call(message, endpoint);

    connection.close();
        SOAPMessage sm = response;
        SOAPBody sb = response.getSOAPBody();
        System.err.println("Node Name:" + sb.getNodeName());  //return nothing
        System.err.println("Local Name:" + sb.getLocalName());  //return Local Name:Body

        DOMSource source = new DOMSource(sb);
        results = (FindEventsResponse) JAXB.unmarshal(source, FindEventsResponse.class);
        System.err.println("Results size: " + this.results.returnTag.results.item.get(0).getName());

} catch (Exception ex) {
    System.err.println("error is here");
    ex.printStackTrace();
}

Response:

<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" 
                   xmlns:ns1="http://ticketmaster.productserve.com/v2/soap.php" 
                   xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
                   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
                   xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" 
                   SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
    <SOAP-ENV:Body>
        <ns1:findEventsResponse>
            <return xsi:type="ns1:Response">
                <details xsi:type="ns1:Details">
                    <totalResults xsi:type="xsd:int">20662</totalResults>
                    <totalPages xsi:type="xsd:int">414</totalPages>
                    <currentPage xsi:type="xsd:int">1</currentPage>
                    <resultsPerPage xsi:type="xsd:int">50</resultsPerPage>
                </details>
                <results SOAP-ENC:arrayType="ns1:Event[50]" xsi:type="ns1:ArrayOfEvent">
                    <item xsi:type="ns1:Event">
                        <eventId xsi:type="xsd:int">1516682</eventId>
                        <ticketmasterEventId xsi:type="xsd:string">18004C6E8D7218A8</ticketmasterEventId>
                        <status xsi:type="xsd:string">onSale</status>
                        <name xsi:type="xsd:string">The Art of the Brick</name>
                        <url xsi:type="xsd:string">http://www.ticketmaster.ie/event/18004C6E8D7218A8?camefrom=CFC_UK_BUYAT&amp;brand=[=BRAND=]</url>
                        <eventDate xsi:type="xsd:string">2014-05-23 10:00:00</eventDate>
                        <onSaleDate xsi:type="xsd:string">0000-00-00 00:00:00</onSaleDate>
                        <preSaleDate xsi:type="xsd:string">0000-00-00 00:00:00</preSaleDate>
                        <category xsi:type="xsd:string">Exhibitions</category>
                        <categoryId xsi:type="xsd:int">754</categoryId>
                        <parentCategory xsi:type="xsd:string">Family &amp;amp; Attractions</parentCategory>
                        <parentCategoryId xsi:type="xsd:int">10003</parentCategoryId>
                        <minPrice xsi:type="xsd:float">17</minPrice>
                        <maxPrice xsi:type="xsd:float">17</maxPrice>
                        <artists SOAP-ENC:arrayType="ns1:Artist[1]" xsi:type="ns1:ArrayOfArtist">
                            <item xsi:type="ns1:Artist">
                                <artistId xsi:type="xsd:int">1806028</artistId>
                                <ticketmasterArtistId xsi:type="xsd:int">1663495</ticketmasterArtistId>
                                <name xsi:type="xsd:string">The Art of the Brick</name>
                                <url xsi:type="xsd:string">http://www.ticketmaster.co.uk/The-Art-of-the-Brick-tickets/artist/1663495?camefrom=CFC_UK_BUYAT&amp;brand=[=BRAND=]</url>
                                <imageUrl xsi:type="xsd:string">http://media.ticketmaster.com/tm/en-us/tmimages/TM_GenCatImgs_Generic_BW.jpg</imageUrl>
                                <category xsi:type="xsd:string">Miscellaneous</category>
                                <categoryId xsi:type="xsd:int">0</categoryId>
                                <parentCategory xsi:type="xsd:string">Miscellaneous</parentCategory>
                                <parentCategoryId xsi:type="xsd:int">10005</parentCategoryId>
                            </item>
                        </artists>
                        <venue xsi:type="ns1:Venue">
                            <venueId xsi:type="xsd:int">3331</venueId>
                            <ticketmasterVenueId xsi:type="xsd:int">198292</ticketmasterVenueId>
                            <name xsi:type="xsd:string">Ambassador Theatre</name>
                            <street xsi:type="xsd:string">Oconnell Street</street>
                            <city xsi:type="xsd:string">Dublin</city>
                            <country xsi:type="xsd:string">United Kingdom</country>
                            <postcode xsi:type="xsd:string">Dublin 1</postcode>
                            <url xsi:type="xsd:string">http://www.ticketmaster.ie/Ambassador-Theatre-tickets-Dublin/venue/198292?camefrom=CFC_UK_BUYAT&amp;brand=</url>
                            <imageUrl xsi:type="xsd:string">http://media.ticketmaster.co.uk/tmimages/TM_GenVenueImg_BW.jpg</imageUrl>
                            <state xsi:type="xsd:string"></state>
                        </venue>
                    </item>
                    <item xsi:type="ns1:Event">
                     ....

Model Classes

@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class FindEventsResponse {
    @XmlElement(name = "return")
    Return returnTag;

    public FindEventsResponse() {
       this.returnTag = new Return();
    }
    getter and setter

}

@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class Return {
    @XmlElement(name = "details")
    Details details;
    @XmlElement(name = "results")
    Results results;

    public Return(Details details, Results results) {
       this.details = new Details();
       this.results = new Results();
    }
    getters and setters


}

@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class Details {

    @XmlElement(name = "totalResults")
    int totalResults;
    @XmlElement(name = "totalPages")
    int totalPages;
    @XmlElement(name = "currentPage")
    int currentPage;
    @XmlElement(name = "resultPerPage")
    int resultsPerPage;

     getters and setters

}

@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class Results {
    @XmlElement(name = "item")
    List<Item> item;

    public Results() {
       this.item = new ArrayList();
    }
    getter and setter



}

@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class Item {

    @XmlElement(name = "eventId")
    int eventId;
    @XmlElement(name = "ticketmasterEventId")
    String ticketmasterEventId;
    @XmlElement(name = "status")
    String status;
    @XmlElement(name = "name")
    String name;
    @XmlElement(name = "url")
    String url;
    @XmlElement(name = "eventDate")
    String eventDate;
    @XmlElement(name = "onSaleDate")
    String onSaleDate;
    @XmlElement(name = "preSaleDate")
    String preSaleDate;
    @XmlElement(name = "category")
    String category;
    @XmlElement(name = "categoryId")
    int categoryId;
    @XmlElement(name = "parentCategory")
    String parentCategory;
    @XmlElement(name = "parentCategoryId")
    int parentCategoryId;
    @XmlElement(name = "minPrice")
    int minPrice;
    @XmlElement(name = "maxPrice")
    int maxPrice;
    @XmlElement(name = "artists")
    private Artists artist;
    @XmlElement(name = "venue")
    private Venue venue;

    public Item() {
       this.artist = new Artists();
       this.venue = new Venue();
    }

    getters and setters

}

@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class Artists {
    @XmlElement(name = "artists")
    private ArtistItem item;

    public Artists() {
        this.item = new ArtistItem();
    }
    getter and setter
}

@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class ArtistItem {

    @XmlElement(name = "artistId")
    int artistId;
    @XmlElement(name = "ticketmasterArtistsId")
    int ticketmasterArtistId;
    @XmlElement(name = "name")
    String name;
    @XmlElement(name = "url")
    String url;
    @XmlElement(name = "imageUrl")
    String imageUrl;
    @XmlElement(name = "category")
    String category;
    @XmlElement(name = "categoryId")
    int categoryId;
    @XmlElement(name = "parentCategory")
    String parentCategory;
    @XmlElement(name = "parentCategoryId")
    int parentCategoryId;

    getters and setters
}

@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class Venue {

    @XmlElement(name = "venueId")
    int venueId;
    @XmlElement(name = "ticketmasterVenueId")
    int ticketmasterVenueId;
    @XmlElement(name = "name")
    String name;
    @XmlElement(name = "street")
    String street;
    @XmlElement(name = "city")
    String city;
    @XmlElement(name = "country")
    String country;
    @XmlElement(name = "postcode")
    String postcode;
    @XmlElement(name = "url")
    String url;
    @XmlElement(name = "imageUrl")
    String imageUrl;
    @XmlElement(name = "state")
    String state;

    getters and setters
}

Based on one of the following answers, I marshalled the result and it shows a wrong response.

package-info.java

@XmlSchema( 
    namespace = "http://ticketmaster.productserve.com/v2/soap.php",
    elementFormDefault = XmlNsForm.UNQUALIFIED) 
package com.ticketmaster.ticketmaster;
import javax.xml.bind.annotation.XmlNsForm;
import javax.xml.bind.annotation.XmlSchema;

Code

    SOAPBody sb = response.getSOAPBody();
System.err.println(">>"+ sb.getFirstChild().getNodeName());
Iterator itr = sb.getChildElements();
while(itr.hasNext()){
    Object element = itr.next();
    System.err.println(element + " ");
}
Document d = sb.extractContentAsDocument();
System.err.println("result of d:"+d.getTextContent());
DOMSource source = new DOMSource(d);
results = (FindEventsResponse) JAXB.unmarshal(source, FindEventsResponse.class);
System.err.println("results>"+results.getReturnTag().getResults().getItem().get(0).getName());

Error is

.....
><city xsi:type="xsd:string">London</city><country xsi:type="xsd:string">United Kingdom</country><postcode xsi:type="xsd:string">SE1 8XX</postcode><url xsi:type="xsd:string">http://www.ticketmaster.co.uk/The-London-Wonderground-tickets-London/venue/253993?camefrom=CFC_UK_BUYAT&amp;brand=</url&g

Answer 1

Ensure You Are Unmarshalling the Correct Thing

You need to unmarshal the content held onto by SOAP body, not the entire SOAP message. Below is what the code might look like:

SOAPMessage sm = response;
SOAPBody sb = response.getSOAPBody();
Document d = sb.extractContentAsDocument();
DOMSource source = new DOMSource(d);
results = (FindEventsResponse) JAXB.unmarshal(source, FindEventsResponse.class);

The result of sb.extractContentAsDocument is going to be a DOM that is equivalent to the following:

<?xml version="1.0" encoding="UTF-8"?>
<ns1:findEventsResponse xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
    xmlns:ns1="http://ticketmaster.productserve.com/v2/soap.php"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"
    SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
    <return xsi:type="ns1:Response">
        <details xsi:type="ns1:Details">
            <totalResults xsi:type="xsd:int">20662</totalResults>
            <totalPages xsi:type="xsd:int">414</totalPages>
            <currentPage xsi:type="xsd:int">1</currentPage>
            <resultsPerPage xsi:type="xsd:int">50</resultsPerPage>
        </details>
        <results SOAP-ENC:arrayType="ns1:Event[50]" xsi:type="ns1:ArrayOfEvent">
            <item xsi:type="ns1:Event">
                <eventId xsi:type="xsd:int">1516682</eventId>
                <ticketmasterEventId xsi:type="xsd:string">18004C6E8D7218A8</ticketmasterEventId>
                <status xsi:type="xsd:string">onSale</status>
                <name xsi:type="xsd:string">The Art of the Brick</name>
                <url xsi:type="xsd:string">http://www.ticketmaster.ie/event/18004C6E8D7218A8?camefrom=CFC_UK_BUYAT&amp;brand=[=BRAND=]</url>
                <eventDate xsi:type="xsd:string">2014-05-23 10:00:00</eventDate>
                <onSaleDate xsi:type="xsd:string">0000-00-00 00:00:00</onSaleDate>
                <preSaleDate xsi:type="xsd:string">0000-00-00 00:00:00</preSaleDate>
                <category xsi:type="xsd:string">Exhibitions</category>
                <categoryId xsi:type="xsd:int">754</categoryId>
                <parentCategory xsi:type="xsd:string">Family &amp;amp; Attractions</parentCategory>
                <parentCategoryId xsi:type="xsd:int">10003</parentCategoryId>
                <minPrice xsi:type="xsd:float">17</minPrice>
                <maxPrice xsi:type="xsd:float">17</maxPrice>
                <artists SOAP-ENC:arrayType="ns1:Artist[1]" xsi:type="ns1:ArrayOfArtist">
                    <item xsi:type="ns1:Artist">
                        <artistId xsi:type="xsd:int">1806028</artistId>
                        <ticketmasterArtistId xsi:type="xsd:int">1663495</ticketmasterArtistId>
                        <name xsi:type="xsd:string">The Art of the Brick</name>
                        <url xsi:type="xsd:string">http://www.ticketmaster.co.uk/The-Art-of-the-Brick-tickets/artist/1663495?camefrom=CFC_UK_BUYAT&amp;brand=[=BRAND=]</url>
                        <imageUrl xsi:type="xsd:string">http://media.ticketmaster.com/tm/en-us/tmimages/TM_GenCatImgs_Generic_BW.jpg</imageUrl>
                        <category xsi:type="xsd:string">Miscellaneous</category>
                        <categoryId xsi:type="xsd:int">0</categoryId>
                        <parentCategory xsi:type="xsd:string">Miscellaneous</parentCategory>
                        <parentCategoryId xsi:type="xsd:int">10005</parentCategoryId>
                    </item>
                </artists>
                <venue xsi:type="ns1:Venue">
                    <venueId xsi:type="xsd:int">3331</venueId>
                    <ticketmasterVenueId xsi:type="xsd:int">198292</ticketmasterVenueId>
                    <name xsi:type="xsd:string">Ambassador Theatre</name>
                    <street xsi:type="xsd:string">Oconnell Street</street>
                    <city xsi:type="xsd:string">Dublin</city>
                    <country xsi:type="xsd:string">United Kingdom</country>
                    <postcode xsi:type="xsd:string">Dublin 1</postcode>
                    <url xsi:type="xsd:string">http://www.ticketmaster.ie/Ambassador-Theatre-tickets-Dublin/venue/198292?camefrom=CFC_UK_BUYAT&amp;brand=</url>
                    <imageUrl xsi:type="xsd:string">http://media.ticketmaster.co.uk/tmimages/TM_GenVenueImg_BW.jpg</imageUrl>
                    <state xsi:type="xsd:string"></state>
                </venue>
            </item>
            <item xsi:type="ns1:Event"></item>
        </results>
    </return>
</ns1:findEventsResponse>

UPDATE

Based on the new exception you are getting:

java.lang.IllegalArgumentException: prefix xsd is not bound to a namespace
    at com.sun.xml.internal.bind.DatatypeConverterImpl._parseQName(DatatypeConverterImpl.java:346)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.LeafPropertyXsiLoader.selectLoader(LeafPropertyXsiLoader.java:75)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.LeafPropertyXsiLoader.startElement(LeafPropertyXsiLoader.java:58)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallingContext._startElement(UnmarshallingContext.java:486)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallingContext.startElement(UnmarshallingContext.java:465)

It appears as though sb.extractContentAsDocument(); is not bringing along the xmlns:xsd declaration from the SOAP message. Instead you can change the code to do the following:

SOAPMessage sm = response;
SOAPBody sb = response.getSOAPBody();
DOMSource source = new DOMSource(sb.getFirstChild());
results = (FindEventsResponse) JAXB.unmarshal(source, FindEventsResponse.class);

Ensure the Namespace Qualification is Mapped Correctly

Having the following tells JAXB that everything mapped to an XML element without an explicitly specified namespace should belong in the http://ticketmaster.productserve.com/v2/soap.php namespace.

@XmlSchema( 
    namespace = "http://ticketmaster.productserve.com/v2/soap.php",
    elementFormDefault = XmlNsForm.QUALIFIED) 
package com.ticketmaster.ticketmaster;
import javax.xml.bind.annotation.XmlNsForm;
import javax.xml.bind.annotation.XmlSchema;

In your XML only the findEventsResponse element is namespace qualified. This means your annotation should be the following instead (note change from QUALIFIED to UNQUALIFIED):

@XmlSchema( 
    namespace = "http://ticketmaster.productserve.com/v2/soap.php",
    elementFormDefault = XmlNsForm.UNQUALIFIED) 
package com.ticketmaster.ticketmaster;
import javax.xml.bind.annotation.XmlNsForm;
import javax.xml.bind.annotation.XmlSchema;

Demo Code

Using the above XML as input.xml I was able to unmarshal and marshal the model as you have defined it in your question with the @XmlSchema fix mentioned above.

import javax.xml.bind.*;
import javax.xml.transform.stream.StreamSource;

public class Demo {

    public static void main(String[] args) throws Exception {
        JAXBContext jc = JAXBContext.newInstance(FindEventsResponse.class);

        Unmarshaller unmarshaller = jc.createUnmarshaller();
        StreamSource xml = new StreamSource("src/forum23806625/input.xml");
        JAXBElement<FindEventsResponse> response = unmarshaller.unmarshal(xml, FindEventsResponse.class);

        Marshaller marshaller = jc.createMarshaller();
        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
        marshaller.marshal(response, System.out);
    }

}