-----Original Message-----
From: Emerson, Matt
Sent: Wednesday, March 09, 2005 6:58 PM
To: [email protected]
Subject: [WARNING: This message originated from outside of Fidelity] [castor-user] Using Interfaces during marshalling/unmarshalling
I have created two classes and 1 interface: Product, SubProduct, and SubProductIF
They are as follows:Public class Product
private SubProductIF sample
public Product()
public void setSample(SubProductIF data) { this sample = data; }
public SubProductIF getSample() { return this.sample; }
}Public class SubProduct implements SubProductIF
{
private String name;
private String value;public SubProduct() {}
public void setName(String data) { this.name = data; }
public void set Value(String data) { this.value = data; }public String getName() { return this.name; }
public String getValue() { return this.value; }
}And the interface:
public interface SubProductIF
{
public void setName(String pValue);
public String getName();
public void setValue(String pValue);
public String getValue();
}The mapping is as follows:
<mapping>
<description>Description of the mapping for the Product Class</description>
<class name="com.fmr.cfit.matt.castor.Product">
<map-to xml="WrapperProductClass"></map-to>
<field name="sample" type="com.fmr.cfit.matt.castor.SubProductIF">
<bind-xml name="sample_product" node="element"/>
</field>
</class>
<class name="com.fmr.cfit.matt.castor.SubProduct">
<map-to xml="sub_product"></map-to>
<field name="name" type="java.lang.String">
<bind-xml name="name" node="attribute"/>
</field>
<field name="value" type="java.lang.String">
<bind-xml name="value" node="element"/>
</field>
</class>
</mapping>When I marshall the class, everything works fine. However, when I unmarshall it, it throws an error because it can't find the constructor for SubProduct. Reading the documentation, it says to use the xsi:type attribute…but that seems like something that has to be added to the final marshalled class. Since I want this to be an identity transformation, if I can't do that automatically, it is not very useful. Does anyone have any ideas how I could make this into an two-way transform using interfaces?
Thanks,
Matt
The Error:
#endElement: class
#endElement: mapping
#startElement: WrapperProductClass
#startElement: sample_productunable to instantiate a new type of: com.fmr.cfit.matt.castor.SubProductIF org.xml.sax.SAXException: unable to instantiate a new type of: com.fmr.cfit.matt.castor.SubProductIF
void org.exolab.castor.xml.UnmarshalHandler.startElement(java.lang.String, java.lang.String, org.exolab.castor.xml.AttributeSet) UnmarshalHandler.java:2096
void org.exolab.castor.xml.UnmarshalHandler.startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes) UnmarshalHandler.java:1292
void org.apache.xerces.parsers.SAXParser.startElement(org.apache.xerces.utils.QName, org.apache.xerces.framework.XMLAttrList, int) SAXParser.java:1371
void org.apache.xerces.validators.common.XMLValidator.callStartElement(org.apache.xerces.utils.QName) XMLValidator.java:840
boolean org.apache.xerces.framework.XMLDocumentScanner.scanElement(org.apache.xerces.utils.QName) XMLDocumentScanner.java:1852 boolean org.apache.xerces.framework.XMLDocumentScanner$ContentDispatcher.dispatch(boolean) XMLDocumentScanner.java:1233 boolean org.apache.xerces.framework.XMLDocumentScanner.parseSome(boolean) XMLDocumentScanner.java:380 void org.apache.xerces.framework.XMLParser.parse(org.xml.sax.InputSource)
XMLParser.java:908
java.lang.Object org.exolab.castor.xml.Unmarshaller.unmarshal(org.xml.sax.InputSource)
Unmarshaller.java:605
java.lang.Object org.exolab.castor.xml.Unmarshaller.unmarshal(java.io.Reader)
Unmarshaller.java:513 void com.fmr.cfit.matt.castor.TestCastor.runTest2()
TestCastor.java:76 void com.fmr.cfit.matt.castor.TestCastor.main(ja
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