Unable to make working "xjcArg" "-Xinject-code"

[rgambelli]

I'm using jaxws-maven-plugin 2.5 with jdk1.8.0_121.
I have a simple wsdl and an even more simple binding file where I'm trying, without success, to add a method in a generated from wsdl bean.
It isn't working without any warnings or errors.

jaxws-maven-plugin is configured in this way:

<plugin>
	<groupId>org.codehaus.mojo</groupId>
	<artifactId>jaxws-maven-plugin</artifactId>
	<version>2.5</version>                
	<configuration>
		<!-- tell JAXB to actually use the XJC plugins -->
		<xjcArgs>
			<xjcArg>-extension</xjcArg>
			<xjcArg>-Xinject-code</xjcArg>
			<!--<xjcArg>-Xsync-methods</xjcArg>-->
		</xjcArgs>
	</configuration>
	<executions>
		<execution>
			<id>wsimport-generate-mail-service</id>
			<phase>generate-sources</phase>
			<goals>
				<goal>wsimport</goal>
			</goals>
			<configuration>
				<sourceDestDir>${project.build.directory}/generated-sources/jaxws-wsimport</sourceDestDir>
				<verbose>true</verbose>
				<packageName>it.cbt.mail.ws.client</packageName>
				<vmArgs>
					<vmArg>-Djavax.xml.accessExternalSchema=all</vmArg>
				</vmArgs>
				<!--<wsdlLocation>http://localhost:9393/MailProxyServer/services/mail-service?wsdl</wsdlLocation>-->
				<wsdlLocation>${project.basedir}/src/wsdl/mail-service.wsdl</wsdlLocation>
				<staleFile>${project.build.directory}/jaxws/stale/mail-service.stale</staleFile>
				<xnocompile>true</xnocompile>
				<verbose>true</verbose>
				<extension>true</extension>
				<bindingFiles>
					<bindingFile>${project.basedir}/src/wsdl/bindings.xjb</bindingFile>
				</bindingFiles>
				<xdebug>true</xdebug>
			</configuration>
		</execution>
	</executions>
</plugin>

and binding file is:

<jaxws:bindings xmlns:jaxws="http://java.sun.com/xml/ns/jaxws"
                xmlns:jaxb="http://java.sun.com/xml/ns/jaxb"
                xmlns:xjc="http://java.sun.com/xml/ns/jaxb/xjc"
                xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"
                xmlns:xs="http://www.w3.org/2001/XMLSchema"
                xmlns:ci="http://jaxb.dev.java.net/plugin/code-injector"
                wsdlLocation="mail-service.wsdl"
                jaxb:extensionBindingPrefixes="ci "
                version="2.0"
                jaxb:version="2.1">  
    
    <jaxb:bindings node="//wsdl:definitions/wsdl:types/xs:schema[@targetNamespace='http://model.ws.mail.cbt.it']/xs:complexType[@name='mailMessageBean']/xs:sequence/xs:element[@name='subject']">
		<ci:code>
            @Override
            public String toString() { return "bravo filippo";}
        </ci:code>        
    </jaxb:bindings> 
    <!--</jaxws:bindings>--> 
</jaxws:bindings> 

I'm not understanding what is missing or if it's a bug, I tried also with the 2.4.1 version.
I really hope you can help me, thank you very much

[theit]

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