Castor Gurus:
I have the following xml to be unmarshalled:
<foo>
<id>42</id>
<bar>
<greeting>hello world</greeting>
</bar>
</foo>
into the following classes:
public class Foo {
public Bar bar;
public String id;
public Bar getBar() {
return bar;
}
public void setBar(Bar bar) {
this.bar = bar;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
}
and
public class Bar {
public String greeting;
public Foo foo;
public String getGreeting() {
return greeting;
}
public void setGreeting(String greeting) {
this.greeting = greeting;
}
public Foo getFoo() {
return foo;
}
public void setFoo(Foo foo) {
this.foo = foo;
}
}
where in Bar I would like a reference to the parent
class Foo.
I set up the mapping as such:
<?xml version="1.0"?>
<!DOCTYPE mapping PUBLIC "-//EXOLAB/Castor Object
Mapping DTD Version 1.0//EN"
"http://castor.exolab.org/mapping.dtd";>
<mapping>
<class name="tudo.foobar.castor.domain.Foo">
<map-to xml="foo"/>
<field name="id"
type="java.lang.String">
<bind-xml name="id"
node="element"/>
</field>
<field name="bar"
type="tudo.foobar.castor.domain.Bar">
<bind-xml name="bar"
node="element"/>
</field>
</class>
<class name="tudo.foobar.castor.domain.Bar">
<map-to xml="bar"/>
<field name="greeting"
type="java.lang.String">
<bind-xml name="greeting"
node="element"/>
</field>
<field name="foo"
type="tudo.foobar.castor.domain.Foo" >
<bind-xml name="foo" />
</field>
</class>
</mapping>
and test it as such:
private void execute(){
Mapping mapping = new Mapping();
try {
// 1. Load the mapping information from the file
mapping.loadMapping( "fooMap.xml" );
// 2. Unmarshal the data
Unmarshaller unmar = new Unmarshaller(mapping);
Foo foo = (Foo)unmar.unmarshal(new InputSource(new
FileReader("FooTest.xml")));
// 3. Do some processing on the data
System.out.println(foo.getBar().getGreeting());
System.out.println(foo.getBar().getFoo().getId());
} catch (Exception e) {
System.out.println(e);
return;
}
}
and the result is:
hello world
java.lang.NullPointerException
I have tried setting the location attribute to ".."
but it does not seem to go "backwards". I have also
tried handlers but can only get the current class- not
the parent class.
Does anyone know how to get a reference to the parent
class of which another class is a member- as just
described????
I tried many sources but have come up with nothing- is
this a Castor limitation?????
Thaanks,
Jim
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