Develop Reference

Trying to parse XML with attribute and map key values in a Map

I have to parse an XML:
<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<data xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<contentType>Document</contentType>
<siteName>mySite</siteName>
<listName>myLib</listName>
<folderName>docset-folder</folderName>
<documentSetName>documentSet</documentSetName>
<fields>
<field name="META_1">123456789</field>
<field name="META_2">Someone</field>
<field name="META_3">Germany</field>
<field name="META_4">Abonnement2 LC</field>
</fields>
</data>
I created a simple POJO class for mapping this XML. I set properties of the XML file.
Concerning the field, I can have as many data with unique name.
#Data
#XmlRootElement(name = "data")
public class MetaDataSharePoint {
#JacksonXmlProperty(localName = "contentType")
private String contentType;
#JacksonXmlProperty
private String siteName;
#JacksonXmlProperty
private String listName;
#JacksonXmlProperty
private String folderName;
#JacksonXmlProperty
private String documentSetName;
#JacksonXmlElementWrapper(localName = "fields")
#JacksonXmlProperty(localName = "field")
private Map<String, Object> fields;
}
My objective is to map correctly this XML and handle a POJO. The following code allow to open an XML file and read its content. The XMLMapper object allows to match the xml and the object.
public static void main(String[] args) throws IOException, SAXException, ParserConfigurationException, XMLStreamException, TransformerException {
String path = "src/test/resources/bill.xml";
XMLInputFactory f = XMLInputFactory.newFactory();
XMLStreamReader sr = f.createXMLStreamReader(new FileInputStream(path));
XmlMapper mapper = new XmlMapper();
sr.next();
mapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
MetaDataSharePoint metaDataSharePoint = mapper.readValue(sr, MetaDataSharePoint.class);
// start test
System.out.println(metaDataSharePoint);
System.out.println("contentType : " + metaDataSharePoint.getContentType());
System.out.println("DocumentSetName : " + metaDataSharePoint.getDocumentSetName());
System.out.println("ListName : " + metaDataSharePoint.getListName());
System.out.println("SiteName : " + metaDataSharePoint.getSiteName());
System.out.println("FolderName : " + metaDataSharePoint.getFolderName());
metaDataSharePoint.getFields().forEach((key, value) -> {
System.out.println(key);
System.out.println(value);
});
// end test
sr.close();
}
I successfully map part of my object.
I print the following:
MetaDataSharePoint(contentType=Document, siteName=mySite, listName=myLib, folderName=docset-folder, documentSetName=documentSet, fields={field={name=META_4, =Abonnement2 LC}})
contentType : Document
DocumentSetName : documentSet
ListName : myLib
SiteName : mySite
FolderName : docset-folder
field
{name=META_4, =Abonnement2 LC}
My map is not returning the expected results. I would like to add to a map keys and values.
I would expect something like this:
key: META_1
value: 123456789
key: META_2
value: Someone
...
I tried using several methods to map this XML unsuccesfully.
Thanks

I simple modified my POJO :
#Data
#AllArgsConstructor #NoArgsConstructor
#Builder
#XmlRootElement(name = "data")
public class MetaDataSharePoint {
#JacksonXmlProperty(localName = "contentType")
private String contentType;
#JacksonXmlProperty
private String siteName;
#JacksonXmlProperty
private String listName;
#JacksonXmlProperty
private String folderName;
#JacksonXmlProperty
private String documentSetName;
#JacksonXmlProperty
private List<MetaDataFields> fields;
}
I replaced the Map with a list of objects. For this I implemented this POJO :
#Data
#Builder
#AllArgsConstructor #NoArgsConstructor
#XmlRootElement(name = "field")
public class MetaDataFields {
#JacksonXmlProperty(isAttribute = true)
private String name;
#JacksonXmlText
private String value;
}
I retrieve the data as I expect. that's cool...

Jackson parsing XML

I'm trying to serialize POJO class to Amazon XML format to aggregate the date from the service.
The goal is to have an xml like:
<ShipmentEventList>
<ShipmentEvent>
<ShipmentItemList>
<ShipmentItem></ShipmentItem>
</ShipmentItemList>
<AmazonOrderId>AAAA</AmazonOrderId>
<PostedDate>BBBB</PostedDate>
<MarketplaceName>CCCC</MarketplaceName>
<SellerOrderId>DDDD</SellerOrderId>
</ShipmentEvent>
</ShipmentEventList>
Here are my POJO classes
ShipmentEventList
public class ShipmentEventList {
#JacksonXmlElementWrapper(localName = "ShipmentEventList")
#JacksonXmlProperty(localName = "ShipmentEvent")
private List<ShipmentEvent> shipmentEventList;
}
ShipmentEvent
#JacksonXmlRootElement(localName = "ShipmentEvent")
public class ShipmentEvent {
#JacksonXmlElementWrapper(localName = "ShipmentItemList")
private List<ShipmentItem> shipmentItemList;
#JacksonXmlProperty(localName = "AmazonOrderId")
private String amazonOrderId;
#JacksonXmlProperty(localName = "PostedDate")
private String postedDate;
#JacksonXmlProperty(localName = "MarketplaceName")
private String marketplaceName;
#JacksonXmlProperty(localName = "SellerOrderId")
private String sellerOrderId;
}
Unfortunatelly, as a result of the serialization I have:
<ShipmentEventList>
<ShipmentEventList>
<ShipmentEvent>
<AmazonOrderId>A</AmazonOrderId>
<PostedDate>B</PostedDate>
<MarketplaceName>C</MarketplaceName>
<SellerOrderId>D</SellerOrderId>
</ShipmentEvent>
<ShipmentEvent>
<AmazonOrderId>B</AmazonOrderId>
<PostedDate>C</PostedDate>
<MarketplaceName>D</MarketplaceName>
<SellerOrderId>E</SellerOrderId>
</ShipmentEvent>
</ShipmentEventList>
</ShipmentEventList>
Could you explain me how does the serialization of collections work in Jackson?

You need to set useWrapping flag to false:
class ShipmentEventList {
#JacksonXmlElementWrapper(useWrapping = false)
#JacksonXmlProperty(localName = "ShipmentEvent")
private List<ShipmentEvent> shipmentEventList;
}

Jackson Serialization of XML with multiple attributes

Trying to figure out how to serialize an xml payload with jackson that has multiple attributes(?) as well as namespaces or locals.
I need the payload to look like this:
<wfs:GetFeature xmlns:wfs="http://www.opengis.net/wfs"
xmlns:ogc="http://www.opengis.net/ogc" xmlns:fade="http://www.bit-sys.com/fade" service="WFS" version="1.1.0" resultType="results" maxFeatures="150001" outputFormat="application/json">
<wfs:Query srsName="EPSG:4326" typeName="ExampleTypeName">
<Filter xmlns="http://www.opengis.net/ogc" xmlns:gml="http://www.opengis.net/gml">
...
And I am working on creating a pojo to use to map the data necessary for this payload to the correct location, but just having trouble differentiating the namespace vs localName parts. The pojo I have so far isn't really producing the desired result (even for the first <GetFeature /> part.
public class MyXmlObject {
#JacksonXmlRootElement(localName = "wfs", namespace = "wfs")
class GetFeature {
#JacksonXmlProperty(isAttribute = true)
private String wfs = "http://www.opengis.net/wfs";
#JacksonXmlProperty(isAttribute = true)
private String ocg = "http://www.opengis.net/ogc";
#JacksonXmlProperty(isAttribute = true)
private String fade = "http://www.bit-sys.com/fade";
#JacksonXmlProperty(isAttribute = true)
private String service;
#JacksonXmlRootElement(localName = "wfs")
public class Query {
#JacksonXmlProperty(isAttribute = true)
private String srsName = "exampleSrsName";
#JacksonXmlProperty(isAttribute = true)
private String typeName = "exampleTypeName";
}
}
}
Right now only running a simple test to see how my xml payload looks as I work on it produces <MyXmlObject /> with nothing else in it, not too sure what I am doing wrong.
#Test
public void whenJavaSerializedToXmlStr_thenCorrect()
throws JsonProcessingException {
XmlMapper xmlMapper = new XmlMapper();
xmlMapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
String xml = xmlMapper.writeValueAsString(new MistXmlObject());
System.out.print(xml);
}

Reading xml file in Java - only selected elements

I have just started to learn how to make a java object from a XML. However, now I have a tricky input and I don't really know how to solve it.
This is the input:
<?xml version="1.0" encoding="UTF-8"?>
<return>
<productChange cd_product="711" ds_product="MBL40337 I151 BLACK P" cd_species="UN" cd_tipi="61062000" cd_cst="5" qt_weight="" cd_nbm="" dt="2016-05-04 11:47:36">
<productvalue cd_company="1" cd_product="711" tp_value="P" cd_value="1" vl_product="61.39">
<tipovaluePrd tp_value="P" cd_value="1" ds_value="SALE" cd_corrency="1" />
</productvalue>
<productvalue cd_company="1" cd_product="711" tp_value="P" cd_value="4" vl_product="129.8">
<tipovaluePrd tp_value="P" cd_value="4" ds_value="SALE STORE" cd_corrency="1" />
</productvalue>
<productvalue cd_company="1" cd_product="711" tp_value="P" cd_value="5" vl_product="64.9">
<tipovaluePrd tp_value="P" cd_value="5" ds_value="SALE AT" cd_corrency="1" />
</productvalue>
<productvalue cd_company="1" cd_product="711" tp_value="P" cd_value="8" vl_product="122.78">
<tipovaluePrd tp_value="P" cd_value="8" ds_value="SALE FQ" cd_corrency="1" />
</productvalue>
</productChange>
</return>
To consume this xml with JaxB (XML provided by a third party company) I have built the following classes:
#XmlAccessorType(XmlAccessType.FIELD)
public class ProductUpdateResponse {
#XmlAttribute(name = "cd_product")
private Integer productCode;
#XmlAttribute(name = "ds_product")
private String productDescription;
#XmlAttribute(name = "cd_species")
private String productSpecie;
#XmlAttribute(name = "cd_tipi")
private Integer productTIPI;
#XmlAttribute(name = "cd_cst")
private Integer productCST;
#XmlAttribute(name = "qt_weight")
private String productWeight;
#XmlAttribute(name = "cd_nbm")
private String productNBM;
#XmlAttribute(name = "dt")
private String productDate;
#XmlElement(name = "productvalue")
private ProductValueType productValue;
// getters and setters
}
#XmlAccessorType(XmlAccessType.FIELD)
public class ProductValue {
#XmlAttribute(name = "cd_product")
private Integer productCode;
#XmlAttribute(name = "cd_company")
private Integer companyCode;
#XmlAttribute(name = "tp_value")
private String valueType;
#XmlAttribute(name = "cd_value")
private Integer valueCode;
#XmlAttribute(name = "vl_product")
private BigDecimal productValue;
#XmlElement(name = "tipovaluePrd")
private ProductValueType productValueType;
//getters and seters
}
#XmlAccessorType(XmlAccessType.FIELD)
public class ProductValueType {
#XmlAttribute(name = "tp_value")
private String valueType;
#XmlAttribute(name = "cd_value")
private String valueCode;
#XmlAttribute(name = "ds_value")
private String valueDescription;
#XmlAttribute(name = "cd_corrency")
private Integer valueCurrency;
//getters and seters
}
However, the main information, for me, is comming as null (productvalue) I wonder if it is because there are four tags productvalue in the xml (I just need the one whose tipovaluePrd.cd_value is 4 ).
Below is the method I'm using to parse the XML:
private ProductUpdateResponse buildResponse(String rawResponse, Class<T> responseClass) {
JAXBContext jaxbContext = null;
try {
jaxbContext = JAXBContext.newInstance(responseClass);
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
StringReader reader = new StringReader(rawResponse);
return (ProductUpdateResponse) unmarshaller.unmarshal(reader);
} catch (JAXBException | ClassCastException e) {
return null;
}
}
So, I wonder if there is a way to read specifically the value I want (productvalue element that has tipovaluePrd.cd_value = 4) and how could I do that. If there isn't, how should I build my class so I can read properly everything?
Changing the input is not an option here...
Thanks in advance for any help.

I'm actually surprised you're getting a result from JAXB with your current setup.
You lack a class representing your root element :
#XmlRootElement(name="return")
#XmlAccessorType(XmlAccessType.FIELD)
public class Return {
#XmlElement(name="productchange")
private ProductUpdateResponse response;
//getters and setters
}
Also, in your ProductUpdateResponse class, you should change :
#XmlElement(name = "productvalue")
private ProductValueType productValue;
by
#XmlElement(name = "productvalue")
private List<ProductValue> productValues;
Finally, in your buildResponse method, make sure the responseClass argument is Return.class.
With this, you should have a list with all your productvalue element. You just have to get the productvalue your interested in from it.
If you only want to get the element you're interested with :
As swasa suggested it, you can use the javax.xml.xpath to make an Xpath request on your XML.
If you're willing to change your JAXB Implementation : EclipseLink JAXB Implementation implements an #XmlPath annotation that allows you to bind objects according to an XPath request :
#XmlPath(name = "productvalue/tipovaluePrd[#cd_value=4]")
private ProductValueType productValueType;

Using jackson xml mapper to map java list in xml

I've a problem with xml Mapper.
I'm using the com.fasterxml.jackson.xml.XmlMapper library.
Practically, this is my java bean that map the values in this way:
#JsonAutoDetect
#JacksonXmlRootElement(localName ="Patient")
public class Patient implements Serializable {
private static final long serialVersionUID = -2981849269841429849L;
#JsonProperty("patientId")
#JacksonXmlProperty(isAttribute = true)
private String patientId;
#JsonProperty("patientName")
#JacksonXmlProperty(isAttribute = true)
private String patientName;
#JacksonXmlProperty(localName = "Series")
#JacksonXmlElementWrapper(useWrapping=false)
private ArrayList<Serie> listSerie;
}
and generate in the main class the xml with:
Wado mapp = new Wado();
mapp.setvalue("bla bla");
String xmlWado = new XmlMapper().writeValueAsString(wado);
the result is:
<Patient patientId="" patientName="">
<Series>
<Series></Series>
<Series></Series>
<Series></Series>
</Series>
that's not I was expected. I want:
<Patient patientId="" patientName="">
<Series></Series>
<Series></Series>
<Series></Series>
Any suggestions?