I have a feature model (in xml format). Is there a way to generate java classes for any given feature model when a required feature is traversed?

I have tried reading the XML file using JAXB but it only reads the first-level elements. I also do not know how to go about generating the java classes for each of the required features in the XML file. Here is a sample feature model that I am working with and the output I have obtained from reading the file.

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
    	<featureModel>
    		<struct>
    			<and abstract="true" mandatory="true" name="SvgMapApp">
    				<feature name="L2Build"/>
    				<and abstract="true" mandatory="true" name="Layers">
    					<feature name="ColorRegion"/>
    					<feature name="Relief"/>
    					<feature name="Rivers"/>
    					<feature name="Lakes"/>
    					<feature name="PopCircle"/>
    				</and>
    				<and abstract="true" mandatory="true" name="Legends">
    					<and abstract="true" name="Controls">
    						<feature name="Navigator"/>
    						<feature name="ReliefControls"/>
    						<feature name="RiverControls"/>
    						<feature name="LakeControls"/>
    						<feature name="PopCircleControls"/>
    						<feature name="CoordinateDisplay"/>
    					</and>
    					<and abstract="true" name="Stats1">
    						<feature name="AgeChart"/>
    						<feature name="StatsMedianAge"/>
    						<feature name="EthnicBarChart"/>
    						<feature name="EthnicPieChart"/>
    					</and>
    					<and abstract="true" name="Stats2">
    						<feature name="StatsSex"/>
    						<feature name="StatsHouseholds"/>
    						<feature name="StatsPopulation"/>
    					</and>
    					<feature hidden="true" name="Legend"/>
    				</and>
    				<feature hidden="true" mandatory="true" name="USStates"/>
    				<feature mandatory="true" name="Base"/>
    			</and>
    		</struct>
    		<constraints>
    			<rule>
    				<imp>
    					<var>PopCircleControls</var>
    					<var>PopCircle</var>
    				</imp>
    			</rule>
    			<rule>
    				<imp>
    					<var>ReliefControls</var>
    					<var>Relief</var>
    				</imp>
    			</rule>
    			<rule>
    				<imp>
    					<var>RiverControls</var>
    					<var>Rivers</var>
    				</imp>
    			</rule>
    			<rule>
    				<imp>
    					<var>LakeControls</var>
    					<var>Lakes</var>
    				</imp>
    			</rule>
    			<rule>
    				<imp>
    					<var>Controls</var>
    					<var>Legend</var>
    				</imp>
    			</rule>
    			<rule>
    				<imp>
    					<var>Stats1</var>
    					<var>Legend</var>
    				</imp>
    			</rule>
    			<rule>
    				<imp>
    					<var>Stats2</var>
    					<var>Legend</var>
    				</imp>
    			</rule>
    			<rule>
    				<imp>
    					<var>L2Build</var>
    					<not>
    						<var>EthnicBarChart</var>
    					</not>
    				</imp>
    			</rule>
    		</constraints>
    		<comments>
    			<c> this turns panel a off</c>
    			<c> this turns panel a off</c>
    			<c>Layers { tab }</c>
    			<c>Legends { out="" }</c>
    			<c>Controls { tab }</c>
    			<c>Stats1 { tab }</c>
    			<c>Stats2 { tab }</c>
    		</comments>
    	</featureModel>

I would like to autogenerate the model classes, but here are the classes I have worked with and the output I obtained:

FeatureModel.java

public class FeatureModel {
	
	 @XmlElement(name="struct")
	 private Struct struct;

	   

	    public Struct getStruct ()
	    {
	        return struct;
	    }

	    public void setStruct (Struct struct)
	    {
	        this.struct = struct;
	    }

	   .....
	    
}

Struct.java

public class Struct {
	
    @XmlElement(name="and")

	private And and[];
	
    public And[] getAnd ()
    {
        return and;
    }

    public void setAnd (And[] and)
    {
        this.and = and;
    }

    .........
    
	
}

Alt.java

public class Alt {
	@XmlElement(name="feature")
	private Feature[] feature;
	
	@XmlAttribute
    private String name;

   
	@XmlAttribute
    private String mandatory;

    public Feature[] getFeature ()
    {
        return feature;
    }

    public void setFeature (Feature[] feature)
    {
        this.feature = feature;
    }

    public String getName ()
    {
        return name;
    }

    public void setName (String name)
    {
        this.name = name;
    }

    
    public String getMandatory ()
    {
        return mandatory;
    }

    public void setMandatory (String mandatory)
    {
        this.mandatory = mandatory;
    }

    ...........
}

And.java

public class And {
	
	@XmlAttribute
    private String name;
	
	@XmlAttribute
    private String mandatory;
	

	@XmlElement(name="feature")
	private Feature[] feature;
	 
	@XmlElement(name="or")
	private Or or;

	@XmlElement(name="alt")
    private Alt alt;
	
	public String getName ()
	    {
	        return name;
	    }

	public void setName (String name)
	    {
	        this.name = name;
	    }
	public Feature[] getFeature ()
	    {
	        return feature;
	    }

	public void setFeature (Feature[] feature)
	    {
	        this.feature = feature;
	    }

    public Or getOr ()
    {
        return or;
    }

    public void setOr (Or or)
    {
        this.or = or;
    }

    public Alt getAlt ()
    {
        return alt;
    }

    public void setAlt (Alt alt)
    {
        this.alt = alt;
    }

  
    public String getMandatory ()
    {
        return mandatory;
    }

    public void setMandatory (String mandatory)
    {
        this.mandatory = mandatory;
    }

    .......
    	
}

Or.java

public class Or {
	
	@XmlElement(name="feature")
	private Feature[] feature;
	
	@XmlAttribute
    private String name;

    public Feature[] getFeature ()
    {
        return feature;
    }

    public void setFeature (Feature[] feature)
    {
        this.feature = feature;
    }

    public String getName ()
    {
        return name;
    }

    public void setName (String name)
    {
        this.name = name;
    }

    ......
}

Feature.java

public class Feature {
	
	@XmlAttribute
	 private String name;

	    public String getName ()
	    {
	        return name;
	    }

	    public void setName (String name)
	    {
	        this.name = name;
	    }

	    ...............
}

Here is my output:
FeatureModel [struct = Struct [and = [And Root = SvgMapApp, mandatory = true, feature = [Feature [name = L2Build], Feature [name = USStates], Feature [name = Base]] [alt = null, or = null]]]]

As for adjusting the generated Java code, look at what exactly each element can contain and what is missing. For instance, the and elements in the xml contain either features or ands (or both); in the And class, only a member for a list of Features is present, so add the ands manually.

public class And {
    
    @XmlAttribute
    private String name;
    
    @XmlAttribute
    private String mandatory;
    

    @XmlElement(name="feature")
    private Feature[] feature;
     
    @XmlElement(name="or")
    private Or or;

    @XmlElement(name="alt")
    private Alt alt;

    // added
    @XmlElement(name="and")
    private And[] and;
}

This should also cover the ands in the deeper nested levels. Looking at your output, the ands are exactly what are missing. I would also assume several ors and alts are possible (so those should be array fields), but those aren't present in the xml at all, so I guess they come from another file - you'll have to see for yourself how they fit in.

The feature seems to always have a name, but also a hidden and mandatory attribute sometimes, so add those to Feature.