You want to create multiple executions in your plugin declaration. This will allow you to have multiple configuration declarations and you can specify the schema and package to be used for that execution. Note that you will need to not clear the output directory between executions in this case.
An example is given on the XJC usage page.
The schemagen tool used by the plugin is part of the JDK distribution since Java 6.
The jaxb2-maven-plugin provides some augmentations to the generated schema files, such as the ability to define a schema prefix and filename for each generated XML schema.
Run the jaxb2-maven-plugin in debug mode to see logging from the schemagen tool. Please refer to the examples for further information.
The schemagen tool generates one XML schema file per XML namespace it finds within the compilation unit (i.e. all annotated Java files selected for XML schema compilation).
The correlation between java files and generated XML schema files is therefore only indirect; a single generated XML schema file can hold the result of annotations within several java files - and a single annotated java source file can give rise to definitions scattered over several XML schema files.
An example is given on the usage page for the schemagen goal.
For the full example (including generated XML Schema definitions), please refer to the schemagen usage page. Provided below are screenshots of two annotated source files, and a constants definition interface.
Namespaces definition interface. Simply defines constants for the
three namespaces used within the two classes below.
package se.west.schema;
public interface Namespaces {
public static final String SOME_NAMESPACE = "http://some/namespace";
public static final String ANOTHER_NAMESPACE = "http://another/namespace";
public static final String YET_ANOTHER_NAMESPACE = "http://yet/another/namespace";
}Class FooBar. By default, all members are compiled to XML schema with
the namespace "http://some/namespace", as defined by the namespace attribute within
the @XmlType annotation on line 9. The aRequiredElementInAnotherNamespace
member belongs to the namespace "http://another/namespace", as defined on line 18.
package se.west.schema;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlType;
@XmlType(namespace = Namespaces.SOME_NAMESPACE,
propOrder = {"requiredElement", "aRequiredElementInAnotherNamespace",
"optionalElement", "requiredAttribute", "optionalAttribute"})
@XmlAccessorType(XmlAccessType.FIELD)
public class FooBar {
@XmlElement(required = true, defaultValue = "requiredElementValue")
private String requiredElement;
@XmlElement(namespace = Namespaces.ANOTHER_NAMESPACE, required = true, defaultValue = "requiredElementValue")
private String aRequiredElementInAnotherNamespace;
@XmlElement(required = false)
private String optionalElement;
@XmlAttribute(required = true)
private String requiredAttribute;
@XmlAttribute(required = false)
private String optionalAttribute;
}Class FooBaz. By default, all members are compiled to XML schema with
the namespace "http://another/namespace", as defined by the namespace attribute within
the @XmlType annotation on line 9. The aRequiredElementInYetAnotherNamespace
member belongs to the namespace "http://yet/another/namespace", as defined on line 18. The
anOptionalElementInSomeNamespace member belongs to the namespace "http://some/namespace",
as defined on line 21.
package se.west.schema;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlType;
@XmlType(namespace = Namespaces.ANOTHER_NAMESPACE,
propOrder = {"requiredElement", "anOptionalElementInSomeNamespace",
"aRequiredElementInYetAnotherNamespace", "requiredAttribute", "optionalAttribute"})
@XmlAccessorType(XmlAccessType.FIELD)
public class FooBaz {
@XmlElement(required = true, defaultValue = "requiredElementValue")
private String requiredElement;
@XmlElement(namespace = Namespaces.YET_ANOTHER_NAMESPACE, required = true, defaultValue = "requiredElementValue")
private String aRequiredElementInYetAnotherNamespace;
@XmlElement(namespace = Namespaces.SOME_NAMESPACE, required = false)
private String anOptionalElementInSomeNamespace;
@XmlAttribute(required = true)
private String requiredAttribute;
@XmlAttribute(required = false)
private String optionalAttribute;
}