Dúvida com XML

Programação Java
#1

Criei minhas classes com JAXB a partir de um XSD.

Tenho esta classe:

public static class PISOutr {
    @XmlElement(name = "CST", required = true)
    protected String cst;

    @XmlElementRefs({
        @XmlElementRef(name = "pPIS", type = JAXBElement.class, required = false),
        @XmlElementRef(name = "vBC", type = JAXBElement.class, required = false)
    })
    protected List<JAXBElement<String>> vbcOrPPIS;
                                
    @XmlElementRefs({
        @XmlElementRef(name = "qBCProd", type = JAXBElement.class, required = false),
        @XmlElementRef(name = "vAliqProd", type = JAXBElement.class, required = false)
    })
    protected List<JAXBElement<String>> qbcProdOrVAliqProd;
                                
    @XmlElement(name = "vPIS", required = true)
    protected String vpis;

    public String getCST() {
        return cst;
    }

    public void setCST(String value) {
        this.cst = value;
    }

    public List<JAXBElement<String>> getVBCOrPPIS() {
        if (vbcOrPPIS == null) {
            vbcOrPPIS = new ArrayList<JAXBElement<String>>();
        }
        return this.vbcOrPPIS;
    }

    public List<JAXBElement<String>> getQBCProdOrVAliqProd() {
        if (qbcProdOrVAliqProd == null) {
            qbcProdOrVAliqProd = new ArrayList<JAXBElement<String>>();
        }
        return this.qbcProdOrVAliqProd;
    }
    
    public String getVPIS() {
        return vpis;
    }

    public void setVPIS(String value) {
        this.vpis = value;
    }
}

para utilizar essa classe faço assim:

EnvCFe.LoteCFe.CFe.InfCFe.Det.Imposto.PIS.PISOutr pisOutr = new EnvCFe.LoteCFe.CFe.InfCFe.Det.Imposto.PIS.PISOutr();
pisOutr.setCST(tributacao);
pisOutr.setVPIS(vPis);
// como preencho os outros campos no xml?

Segue a estrutura do conteúdo do XML:

1.PNG824×337 24.7 KB

XSD:

<xs:element name="PISOutr" minOccurs="1" maxOccurs="1">
    <xs:complexType>
        <xs:sequence>
            <xs:element name="CST" minOccurs="1" maxOccurs="1" >
                <xs:simpleType>
                    <xs:restriction base="xs:string">
                        <xs:pattern value="^\d{2}"/>
                    </xs:restriction>
                </xs:simpleType>
            </xs:element>
            <xs:choice minOccurs="1" maxOccurs="1">
                <xs:choice minOccurs="2" maxOccurs="2">
                    <xs:element name="vBC" minOccurs="0" maxOccurs="1" >
                        <xs:simpleType>
                            <xs:restriction base="xs:string">
                                <xs:pattern value="^\d{1,13}[.]{1}[0-9]{2}$"/>
                            </xs:restriction>
                        </xs:simpleType>
                    </xs:element>
                    <xs:element name="pPIS" minOccurs="0" maxOccurs="1" >
                        <xs:simpleType>
                            <xs:restriction base="xs:string">
                                <xs:pattern value="^\d{1}[.]{1}[0-9]{4}$"/>
                            </xs:restriction>
                        </xs:simpleType>
                    </xs:element>
                </xs:choice>
                <xs:choice minOccurs="2" maxOccurs="2">
                    <xs:element name="qBCProd" minOccurs="0" maxOccurs="1">
                        <xs:simpleType>
                            <xs:restriction base="xs:string">
                                <xs:pattern value="^\d{1,12}[.]{1}[0-9]{4}$"/>
                            </xs:restriction>
                        </xs:simpleType>
                    </xs:element>
                    <xs:element name="vAliqProd" minOccurs="0" maxOccurs="1">
                        <xs:simpleType>
                            <xs:restriction base="xs:string">
                                <xs:pattern value="^\d{1,11}[.]{1}[0-9]{4}$"/>
                            </xs:restriction>
                        </xs:simpleType>
                    </xs:element>
                </xs:choice>
            </xs:choice>
            <xs:element name="vPIS" minOccurs="1" maxOccurs="1">
                <xs:simpleType>
                    <xs:restriction base="xs:string">
                        <xs:pattern value="^\d{1,13}[.]{1}[0-9]{2}$"/>
                    </xs:restriction>
                </xs:simpleType>
            </xs:element>
        </xs:sequence>
    </xs:complexType>
</xs:element>

Preciso preencher o campo (vBC e pPIS) ou (qBCProd e vAliqProd)

Como faço para preencher estes campos utilizando a classe que foi criada pelo JAXB?