Re: Unmarshall and Marshalling does not produce the same XML

From: Herpertz, Francesca <francesca.herpertz_at_bearingpoint.com>
Date: Wed, 18 Mar 2015 12:41:19 +0000

Hi,

I have done some more research and came across the following article:
http://hwellmann.blogspot.de/2011/03/jaxb-marshalling-with-custom-namespace.html?m=1

I made some changes in my code according to this. Additionally I changed some things in my marshaling method. I left out the explicit setting of the namespace according to another stack overflow article:

private void marshal(String filepath, Validation validation) throws Exception {

JAXBContext jc = JAXBContext.newInstance(Validation.class);

Marshaller m = jc.createMarshaller();

m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

m.setProperty(Marshaller.JAXB_NO_NAMESPACE_SCHEMA_LOCATION, "http://somenamespace.com/engine/xsd/validation.xsd");

OutputFormat format = new OutputFormat();

format.setIndent(true);

format.setNewlines(true);

XMLWriter writer = new XMLWriter(new FileOutputStream(new File(filepath)), format);

m.marshal(validation, writer);

writer.flush();

writer.close();

}

I tested it with the following option in my package-info.java:

@XmlSchema(namespace = "http://somenamespace.com/ValidationType",

    xmlns = {

        @XmlNs(prefix = "", namespaceURI = "http://somenamespace.com/ValidationType"),

    },

    elementFormDefault = javax.xml.bind.annotation.XmlNsForm.QUALIFIED)

package com.somepackage.schema;

import javax.xml.bind.annotation.XmlNs;

import javax.xml.bind.annotation.XmlSchema;

But this will give me instead of ns2: as prefix ns3 like this:
<ns3:validation�

When I change it to something like this:

@XmlSchema(namespace = "http://somenamespace.com/ValidationType",

    xmlns = {

        @XmlNs(prefix = "test", namespaceURI = "http://somenamespace.com/ValidationType"),

    },

    elementFormDefault = javax.xml.bind.annotation.XmlNsForm.QUALIFIED)

package com.somepackage.schema;

import javax.xml.bind.annotation.XmlNs;

import javax.xml.bind.annotation.XmlSchema;

This will result in the expected behavior like this:
<test:validation�

Is there something I am doing really really wrong? I would really appreciate some hints to solve this problem.

Thank you for your help already.

Kind regards,
Francesca

From: <Herpertz>, Francesca Herpertz <francesca.herpertz_at_bearingpoint.com<mailto:francesca.herpertz_at_bearingpoint.com>>
Date: Dienstag, 17. M�rz 2015 17:07
To: "users_at_jaxb.java.net<mailto:users_at_jaxb.java.net>" <users_at_jaxb.java.net<mailto:users_at_jaxb.java.net>>
Subject: Re: Unmarshall and Marshalling does not produce the same XML

Hi,

The Prefix Mapper would be the preferable option. Thank you for your help.

I would compare with a diff not with a string compare as the order could be random.
I am using java 7 and I can only find references to 1.6 instructions concerning the usage of the prefix mapper. Is there still a way to access the NamespacePrefixMapper in the newer Java version?

Kind regards,
Francesca

From: <Herpertz>, Francesca Herpertz <francesca.herpertz_at_bearingpoint.com<mailto:francesca.herpertz_at_bearingpoint.com>>
Date: Dienstag, 17. M�rz 2015 16:35
To: "users_at_jaxb.java.net<mailto:users_at_jaxb.java.net>" <users_at_jaxb.java.net<mailto:users_at_jaxb.java.net>>
Subject: Re: Unmarshall and Marshalling does not produce the same XML

Hi,

I want to do it because the other system which later on should get the XML file does not handle namespaces.

I know � technically you are doing everything correctly�. But I was hoping on some easy way to get the java object into the output format with jaxb.

Kind regards,
Francesca

From: <Herpertz>, Francesca Herpertz <francesca.herpertz_at_bearingpoint.com<mailto:francesca.herpertz_at_bearingpoint.com>>
Date: Dienstag, 17. M�rz 2015 14:19
To: "users_at_jaxb.java.net<mailto:users_at_jaxb.java.net>" <users_at_jaxb.java.net<mailto:users_at_jaxb.java.net>>
Subject: Unmarshall and Marshalling does not produce the same XML

Hi,

I got a problem with a small unit test I am trying to create.

My test unmarshals an existing XML into a java object (Generated by the XJC plugin via maven) and marshals it back into an XML.
In the end I am trying to compare both files with one another. Sadly those two files are not the same.

The issue I am having is that JAXB will add a default prefix for the namespace during the marshaling process.

My xml input looks the following:

<?xml version="1.0"?>

<validation xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns="http://somenamespace.com/ValidationType"xsi:noNamespaceSchemaLocation="http://somenamespace.com/test/xsd/validation.xsd">

<modulename="B_stat"f001Filter="qualifier>=4 and (a is null or a=0)">

�

�

�

What I get as a result looks the following:

<?xml version="1.0"?>

<ns2:validation xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:ns2="http://somenamespace.com/ValidationType"xsi:noNamespaceSchemaLocation="http://somenamespace.com/test/xsd/validation.xsd">

<ns2:modulename="B_stat"f001Filter="qualifier>=4 and (a is null or a=0)">

�
�
�

My java code looks like this:

privatevoid marshal(String filepath, Validation validation) throws Exception {

JAXBContext jc = JAXBContext.newInstance(Validation.class);

Marshaller m = jc.createMarshaller();

m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

m.setProperty(Marshaller.JAXB_NO_NAMESPACE_SCHEMA_LOCATION, "http://somenamespace.com/test/xsd/validation.xsd");

XMLStreamWriter writer = (XMLStreamWriter) XMLOutputFactory

                .newInstance().createXMLStreamWriter(new FileWriter(filepath));

SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);

Schema schema = factory.newSchema(new File("src/main/resources/xsd/validation.xsd"));

m.setSchema(schema);

m.marshal(validation, writer);

writer.flush();

writer.close();

}

How would I get rid of the ns2: prefix but keep my xmlns="http://somenamespace.com/ValidationType� ? I have found several articles which suggest creating a custom mapper. Some also say that the only way to handle this is to traverse the DOM tree after its creation and remove the ns2: prefixes manually. Is there an elegant and by the framework supported way to get the same back what I initially unmashaled?
Please keep in mind that my Java classes are generated via maven and a change in them would not help me for long (until the next person makes a mvn package ;) )

I would really appreciate some help here.

Thanks and kind regards,
Francesca Herpertz
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