Tutorial :JAXB constructor injection



Question:

I would like to know how I can make the JAXB compiler make certain elements in my XML schema be declared as final in the java class definition and I would also like to be able to control the different constructors, as in I would like a constructor that could create the object with a full list of parameters contained in the class as well as the default private constructor needed by JAXB.

Any help?

Thanks.

Here is an example of what I am trying to do:

<xs:complexType name="mycomplex">      <xs:all>          <xs:element name="myboolean" type="xs:boolean"/>      </xs:all>  </xs:complexType>  

now the generated code will look something like

public class mycomplex  {          protected boolean myboolean;            public boolean getMyboolean() { return myboolean; }          public void setMyboolean(boolean b) { this.myboolean = b; }  }  

but I would like to edit the schema to make it look like:

public class mycomplex  {          protected final boolean myboolean;            public mycomplex(boolean b) { this.myboolean = b; }            public boolean getMyboolean() { return myboolean; }  }  

Can this be achieved?


Solution:1

There isn't a standard JAXB way to generate a class that looks like that, because the JAXB spec doesn't support mapping to a class like that.

You could use the following code to avoid having a set method. You can add additional constructors if you want as long as there is a public default one.

import javax.xml.bind.annotation.XmlAccessType;  import javax.xml.bind.annotation.XmlAccessorType;    @XmlAccessorType(XmlAccessType.FIELD)  public class mycomplex      {              protected final boolean myboolean;                public boolean getMyboolean() { return myboolean; }      }      

If you want to use the class that you described above with a non-default constructor and a field marked final you will need to create an XmlAdapter:


Solution:2

I have resolved this in another way. I am creating a tool that will edit the java source code files produced and will add in/remove what I need. Refer to this for more information: Using the Eclipse AST


Solution:3

I have similar problem and I found the following library: http://simple.sourceforge.net/download/stream/doc/tutorial/tutorial.php#immutable

And everything seems so simple now ;)


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