Thank you Ralf.
> if you do not have control over XSD there is only one option you can
> try. You can treat the relation between Product and Detail as n:m. For a
> n:m relation you will create a seperate relation table that stores which
> Detail belongs to which Product. It should be possible to define such a
> relation only on the Product side. Informations about how to map n:m
> relations are included in Castor docs.
OK.
If I can modify the XSD, do I have more sophisticated solutions ?
> Akihito Nakamura schrieb:
> > Hi,
> >
> > I have Java classes generated using Castor Code Generator,
> > and they works fine for XML-Java marshalling/unmarshalling.
> > I want to utilize the classes for Java-SQL mapping, too.
> >
> > My question is how to create a reference from the dependent
> > class to the master one, in 1:m relationship.
> > The dependent appears in the content model of the master's
> > complex type definition in the XML schema.
> >
> > In the Castor JDO, dependent objects must have reference to
> > its master object. Finally, the reference is stored as a
> > foreign key in the dependent side table.
> >
> > How can I treat such 1:m objects as master and dependents in JDO ?
> > Some subclasses of generated classes should be written by hand ?
> >
> >
> >
> > For example, suppose a product has many details.
> > The XML schema looks like:
> > ===========================================================
> > <xsd:complexType name="productDetailType">
> > <xsd:attribute name="id" type="xsd:string" use="required" />
> > <xsd:attribute name="name" type="xsd:string" use="required" />
> > </xsd:complexType>
> >
> > <xsd:element name="product" type="productType" />
> >
> > <xsd:complexType name="productType">
> > <xsd:sequence>
> > <!-- Product has many Details. -->
> > <xsd:element name="detail" type="productDetailType"
> > minOccurs="0" maxOccurs="unbounded" />
> > </xsd:sequence>
> > <xsd:attribute name="id" type="xsd:string" use="required" />
> > <xsd:attribute name="name" type="xsd:string" use="required" />
> > .....
> > </xsd:complexType>
> > ===========================================================
> >
> >
> > A snippet of the generated classes:
> > ===========================================================
> > public class ProductDetailType implements java.io.Serializable {
> > private java.lang.String _id;
> > private java.lang.String _name;
> > .....
> > }
> >
> > public class Detail extends ProductDetailType
> > implements java.io.Serializable
> > {
> > .....
> > }
> >
> > public class ProductType implements java.io.Serializable {
> > private java.lang.String _id;
> > private java.lang.String _name;
> > private java.util.Vector _detailList;
> > .....
> > public void addDetail(final Detail vDetail)
> > throws java.lang.IndexOutOfBoundsException {
> > this._detailList.addElement(vDetail);
> > }
> > .....
> > }
> > ===========================================================
> >
> >
> > As you can find in the Castor example, the following code
> > is required for master-dependents relation.
> > ===========================================================
> > public class ProductDetailType implements java.io.Serializable {
> > private java.lang.String _id;
> > private java.lang.String _name;
> > private Product _product;
> >
> > public void setProduct( final Product product )
> > {
> > _product = product;
> > }
> > .....
> > }
> >
> > public class ProductType implements java.io.Serializable {
> > private java.util.Vector _detailList;
> >
> > public void addDetail(final Detail vDetail) {
> > .....
> > this._detailList.addElement(vDetail);
> > vDetail.setProduct(this);
> > }
> > .....
> > }
> > ===========================================================
> >
> >
> > ----
> > Akihito NAKAMURA @ AIST
> >
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe from this list, please visit:
> >
> > http://xircles.codehaus.org/manage_email
> >
> >
> >
>
> --
>
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