I am using JAXB to create an xml.
Used
marshaller.setProperty(
Marshaller.JAXB_NO_NAMESPACE_SCHEMA_LOCATION,
"bla-bla.xsd");
the xml being generated is
<Interface xsi:noNamespaceSchemaLocation="bla-bla.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
however the application that is parsing this xml for some reason is not parse it as they need it in this format
<Interface xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="bla-bla.xsd">
changing the target application is not an option :(
The following approach leveraging JAXB and StAX appears to give you the desired output, but since the order of attributes is not significant it is not guaranteed to always work.
import javax.xml.bind.*;
import javax.xml.stream.*;
public class Demo {
public static void main(String[] args) throws Exception {
JAXBContext jc = JAXBContext.newInstance(Interface.class);
XMLOutputFactory xof = XMLOutputFactory.newFactory();
XMLStreamWriter xsw = xof.createXMLStreamWriter(System.out);
Marshaller marshaller = jc.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_NO_NAMESPACE_SCHEMA_LOCATION, "bla-bla.xsd");
marshaller.marshal(new Interface(), xsw);
}
}
Output
<?xml version="1.0"?><Interface xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="bla-bla.xsd"></Interface>
Related
I don't want to use annotations on my class to marshal/unmarshal from XML. i know jaxb does not need annotations to unmarshal xml into an object as long as the property names and the structure match. it works with numbers and strings but it does not seem to work with Booleans. these always end up as nulls, and when marshalling, Boolean properties do not show up in the resulting XML.how can i make it work without using annotations?
You will at least need the #XmlRootElement annotation on your root class.
The preferred naming convention for a boolean getter is isSomething() instead of getSomething().
The following Java class
#XmlRootElement
public class Root {
private Boolean something;
public Boolean isSomething() {
return something;
}
public void setSomething(Boolean something) {
this.something = something;
}
}
works fine for me with this XML input:
<root>
<something>true</something>
</root>
I have tested with this main method:
public static void main(String[] args) throws Exception {
JAXBContext context = JAXBContext.newInstance(Root.class);
Unmarshaller unmarshaller = context.createUnmarshaller();
File file = new File("root.xml");
Root root = (Root) unmarshaller.unmarshal(file);
Marshaller marshaller = context.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.marshal(root, System.out);
}
The generated XML output is:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<root>
<something>true</something>
</root>
I am trying to consume a web service using JAXWS and wsimport. The WSIMPORT tool generated all the required classes and I can invoke the service without any issues.
However, I noticed in cases where response contains a nil element with valid attribute values, JAXWS fails to unmarshall it and throws a NullPointerException. I used SOAP UI to help debug and here's what I found. The response returns the following XML (Excerpt):
<externalIdentifiers>
<identifierType code="2" name="Passport" xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
<identifierValue/>
<issuingCountry xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
</externalIdentifiers>
In my Java code, when trying to read the "name" property of identifier type as above, it throws a NPE:
if(id.getIdentifierType() == null)
{
System.out.println("NULL");
}
System.out.println("Identifier Type: " + id.getIdentifierType().getName());
Output:
NULL
Exception in thread "main" java.lang.NullPointerException
To me that does looks a reasonable response as in the response, identifierType is set as xsi:nil="true". That is also perfectly valid XML as per W3C. Question is, how do I read the attribute values such as code and name in such a case?
Below is how you can support this use case:
Java Model
ExternalIdentifiers
You can change the identifierType property to be of type JAXBElement<IdentifierType> instead of IdentifierType. To do this you will need to annotate the property with #XmlElementRef.
import javax.xml.bind.JAXBElement;
import javax.xml.bind.annotation.*;
#XmlRootElement
#XmlAccessorType(XmlAccessType.FIELD)
public class ExternalIdentifiers {
#XmlElementRef(name="identifierType")
private JAXBElement<IdentifierType> identifierType;
public JAXBElement<IdentifierType> getIdentifierType() {
return identifierType;
}
}
ObjectFactory
You will need a corresponding #XmlElementDecl annotation on a create method in a class annotated with #XmlRegistry.
import javax.xml.bind.JAXBElement;
import javax.xml.bind.annotation.*;
import javax.xml.namespace.QName;
#XmlRegistry
public class ObjectFactory {
#XmlElementDecl(name="identifierType")
public JAXBElement<IdentifierType> createIdentifierType(IdentifierType identifierType) {
return new JAXBElement(new QName("identifierType"), IdentifierType.class, identifierType);
}
}
Demo Code
input.xml
<?xml version="1.0" encoding="UTF-8"?>
<externalIdentifiers>
<identifierType code="2" name="Passport" xsi:nil="true"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" />
</externalIdentifiers>
Demo
import java.io.File;
import javax.xml.bind.*;
public class Demo {
public static void main(String[] args) throws Exception {
JAXBContext jc = JAXBContext.newInstance(ExternalIdentifiers.class, ObjectFactory.class);
Unmarshaller unmarshaller = jc.createUnmarshaller();
File xml = new File("src/forum18834036/input.xml");
ExternalIdentifiers externalIdentifiers = (ExternalIdentifiers) unmarshaller.unmarshal(xml);
System.out.println(externalIdentifiers.getIdentifierType().getValue().getName());
}
}
Output
Passport
Note
Currently there is a bug in EclipseLink JAXB (MOXy) regarding this use case:
http://bugs.eclipse.org/404944
I am creating an xml file whose root elemenet structure shuould be like:
<RootElement xmlns="http://www.mysite.com" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.mysite.com/abc.xsd">
i created package-info.java class but i can get only one namespace by writing this code:
#XmlSchema(
namespace = "http://www.mysite.com",
elementFormDefault = javax.xml.bind.annotation.XmlNsForm.QUALIFIED)
package myproject.myapp;
import javax.xml.bind.annotation.XmlSchema;
Any idea?
Below is some demo code that will produce the XML you are looking for. You can use the Marshaller.JAXB_SCHEMA_LOCATION property to specify the schemaLocation this will cause the http://www.w3.org/2001/XMLSchema-instance namespace to be automatically declared.
Demo
package myproject.myapp;
import javax.xml.bind.*;
public class Demo {
public static void main(String[] args) throws Exception {
JAXBContext jc = JAXBContext.newInstance(RootElement.class);
RootElement rootElement = new RootElement();
Marshaller marshaller = jc.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.setProperty(Marshaller.JAXB_SCHEMA_LOCATION, "http://www.mysite.com/abc.xsd");
marshaller.marshal(rootElement, System.out);
}
}
Output
Below is the output from running the demo code.
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<RootElement xmlns="http://www.mysite.com" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.mysite.com/abc.xsd"/>
package-info
This is the package-info class from your question.
#XmlSchema(
namespace = "http://www.mysite.com",
elementFormDefault = javax.xml.bind.annotation.XmlNsForm.QUALIFIED
)
package myproject.myapp;
import javax.xml.bind.annotation.*;
RootElement
Below is a simplified version of your domain model:
package myproject.myapp;
import javax.xml.bind.annotation.XmlRootElement;
#XmlRootElement(name="RootElement")
public class RootElement {
}
In the older Jaxb you can specify additional namespaces using #XmlSeeAlso and in the newer Jaxb you can use #XmlNs in package-info.java see this answer: https://stackoverflow.com/a/63559294/447503
i have created a Company class that does produce xml like below using marshalling :
<?xml version="1.0" encoding="UTF-8"?>
<ns2:company xmlns:ns2="http://www.example.com/">
<ns2:employee>
<job>sogi</job>
<name>togi</name>
<age>22</age>
</ns2:employee>
</ns2:company>
Note:I used #XmlPath("employee/job/text()") tag in Company class to get the required path.
but when unmarshalling i use the same Company class,i do not get the correct object values.Instead i get null values.
You need to include namespace information in the #XmlPath annotation.
package-info
Since your XML document has namespace qualification, you will need to leverage the package level #XmlSchema annotation to specify the namespace information.
#XmlSchema(
namespace="http://www.example.com/",
xmlns={
#XmlNs(namespaceURI = "http://www.example.com/", prefix = "foo")
}
)
package forum14848450;
import javax.xml.bind.annotation.*;
Company
In the #XmlPath mapping for the fragments of the XmlPath that are namespace qualified you need to leverage the prefixes you defined on the #XmlSchema annotation.
package forum14848450;
import javax.xml.bind.annotation.XmlRootElement;
import org.eclipse.persistence.oxm.annotations.XmlPath;
#XmlRootElement
public class Company {
#XmlPath("foo:employee/job/text()")
private String employeeJob;
#XmlPath("foo:employee/name/text()")
private String employeeName;
#XmlPath("foo:employee/age/text()")
private int employeeAge;
}
jaxb.properties
To specify MOXy as your JAXB provider you need to include a file called jaxb.properties in the same package as your domain model with the following entry (see: http://blog.bdoughan.com/2011/05/specifying-eclipselink-moxy-as-your.html).
javax.xml.bind.context.factory=org.eclipse.persistence.jaxb.JAXBContextFactory
Demo
The demo code below will unmarshal the document from your question, and then marshal it back to XML.
package forum14848450;
import java.io.File;
import javax.xml.bind.*;
public class Demo {
public static void main(String[] args) throws Exception {
JAXBContext jc = JAXBContext.newInstance(Company.class);
Unmarshaller unmarshaller = jc.createUnmarshaller();
File xml = new File("src/forum14848450/input.xml");
Company company = (Company) unmarshaller.unmarshal(xml);
Marshaller marshaller = jc.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.marshal(company, System.out);
}
}
Output
Below is the output from running the demo code. Note how the output document uses the prefixes defined in the #XmlPath annotation.
<?xml version="1.0" encoding="UTF-8"?>
<foo:company xmlns:foo="http://www.example.com/">
<foo:employee>
<job>sogi</job>
<name>togi</name>
<age>22</age>
</foo:employee>
</foo:company>
For More Information
http://blog.bdoughan.com/2010/09/xpath-based-mapping-geocode-example.html
In the reference JAXB implementation is there anyway to get XmlSeeAlso to use the name= value from XmlRootElement?
The effect I want is for the type attribute to use the name= value rather than actual class name from XmlSeeAlso.
Is this possible is some other JAXB implementation?
Small example:
#XmlRootElement(name="some_item")
public class SomeItem{...}
#XmlSeeAlso({SomeItem.class})
public class Resource {...}
XML:
<resource xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="some_item">
...
</resource>
Possible without a lot of effort?
About #XmlSeeAlso
The purpose of the #XmlSeeAlso annotation is just to let your JAXB (JSR-222) implementation know that when it is processing the metadata for Resource that it should also process the metadata for the SomeItem class. Some people mistakenly believe that it is related to mapping inheritance since that is the use case it is most often used with. Since the subclasses of a class can not be determined using Java reflection, #XmlSeeAlso is used to let the JAXB implementation know that mappings for the subclasses should also be created.
Below is an example of how you could support your use case:
Resource
The complex type name corresponding to a Java class is supplied via the #XmlType annotation.
package forum12288631;
import javax.xml.bind.annotation.XmlType;
#XmlType(name="some_item")
public class Resource {
}
Demo
The root element name can come from the #XmlRootElement annotation or can be supplied via an instance of JAXBElement. We will create an instance of JAXBElement and indicate that it is holding onto an instance of Object. When marshalled this will for the xsi:type attribute to be included in the output.
package forum12288631;
import javax.xml.bind.*;
import javax.xml.namespace.QName;
public class Demo {
public static void main(String[] args) throws Exception {
JAXBContext jc = JAXBContext.newInstance(Resource.class);
Resource resource = new Resource();
JAXBElement<Object> jaxbElement = new JAXBElement<Object>(QName.valueOf("resource"), Object.class, resource);
Marshaller marshaller = jc.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.marshal(jaxbElement, System.out);
}
}
Output
The resulting XML has the root element supplied by the JAXBElement and the value of the xsi:type attribute comes from the #XmlType annotation on Resource.
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<resource xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="some_item"/>