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Difference between revisions of "EclipseLink/UserGuide/MOXy/Type Level/Setting Up Namespace Information"

Line 146: Line 146:
 
   ...
 
   ...
 
}
 
}
 +
</source>
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</div>
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This can be defined in EclipseLink XML Bindings as follows:
 +
 +
<div style="width:800px">
 +
<source lang="xml">
 +
<?xml version="1.0" encoding="UTF-8"?>
 +
<xml-bindings xmlns="http://www.eclipse.org/eclipselink/xsds/persistence/oxm">
 +
    <xml-schema
 +
        element-form-default="QUALIFIED"
 +
        namespace="http://www.example.org/package">
 +
    </xml-schema>
 +
 +
    <java-types>
 +
        <java-type name="Customer">
 +
            <xml-type namespace="http://www.example.org/type" />
 +
            <java-attributes>
 +
                <xml-element java-attribute="name" />
 +
                <xml-element java-attribute="account" namespace="http://www.example.org/property" />
 +
            </java-attributes>
 +
        </java-type>
 +
    </java-types>
 +
</xml-bindings>
 
</source>
 
</source>
 
</div>
 
</div>

Revision as of 14:03, 25 July 2011

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Setting Up Namespace Information

Most XML documents are qualified with a namespace. You can namespace-qualify elements of your Java class at the following levels:

  • Package
  • Type
  • Field / Property


In most cases, package-level annotation is sufficient. You can use the other levels to customize your document. Use the the @XmlSchema annotation to specify the namespace.


Package Level

Use the @XmlSchema annotation on the package to set a default namespace and specify that all elements in the package are qualified with the namespace. This information is specified in a special Java source file, package-info.java.

@XmlSchema(
   namespace="http://www.example.org/package",
   elementFormDefault=XmlNsForm.QUALIFIED)
package example;
 
import javax.xml.bind.annotation.XmlNsForm;
import javax.xml.bind.annotation.XmlSchema;

This can be defined in EclipseLink XML Bindings as follows:

<?xml version="1.0" encoding="UTF-8"?>
<xml-bindings xmlns="http://www.eclipse.org/eclipselink/xsds/persistence/oxm">
    <xml-schema
        element-form-default="QUALIFIED"
        namespace="http://www.example.org/package">
    </xml-schema>
 
    <java-types>
        <java-type name="Customer">
        ...
 
</xml-bindings>

Using a simple Customer class, this will produce the following XML:

<customer xmlns="http://www.example.org/package">
   <name>Jane Doe</name>
   <account>36328721</account>
</customer>

All elements are qualified with the "http://www.example.org/package" namespace.


Type Level

Type level annotations will override the package level namespace.

package example;
 
@XmlRootElement
@XmlType(namespace="http://www.example.org/type")
public class Customer {
   private String name;
 
   private String account;
 
   ...
}

This can be defined in EclipseLink XML Bindings as follows:

<?xml version="1.0" encoding="UTF-8"?>
<xml-bindings xmlns="http://www.eclipse.org/eclipselink/xsds/persistence/oxm">
    <xml-schema
        element-form-default="QUALIFIED"
        namespace="http://www.example.org/package">
    </xml-schema>
 
    <java-types>
        <java-type name="Customer">
            <xml-type namespace="http://www.example.org/type" />
            <java-attributes>
                <xml-element java-attribute="name" />
                <xml-element java-attribute="account" />
            </java-attributes>
        </java-type>
    </java-types>
</xml-bindings>

This will produce the following XML:

<ns2:customer xmlns="http://www.example.org/type" xmlns:ns2="http://www.example.org/package">
    <name>Jane Doe</name>
    <account>36328721</account>
</ns2:customer>

Only elements inside the Customer type are qualified with the "http://www.example.org/type" namespace.


Field/Property Level

You can override the package or type namespaces at the property/field level. All attribute and element annotations accept the namespace parameter.

package example;
 
@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(namespace="http://www.example.org/type")
public class Customer {
   private String name;
 
   @XmlElement(namespace="http://www.example.org/property")
   private String account;
 
   ...
}

This can be defined in EclipseLink XML Bindings as follows:

<?xml version="1.0" encoding="UTF-8"?>
<xml-bindings xmlns="http://www.eclipse.org/eclipselink/xsds/persistence/oxm">
    <xml-schema
        element-form-default="QUALIFIED"
        namespace="http://www.example.org/package">
    </xml-schema>
 
    <java-types>
        <java-type name="Customer">
            <xml-type namespace="http://www.example.org/type" />
            <java-attributes>
                <xml-element java-attribute="name" />
                <xml-element java-attribute="account" namespace="http://www.example.org/property" />
            </java-attributes>
        </java-type>
    </java-types>
</xml-bindings>

This will produce the following XML:

<ns3:customer xmlns="http://www.example.org/type" xmlns:ns2="http://www.example.org/property"
    xmlns:ns3="http://www.example.org/package">
    <name>Jane Doe</name>
    <ns2:account>36328721</ns2:account>
</ns3:customer>

Only the account element is qualified with the "http://www.example.org/property" namespace.


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