> > . Suppose i have
> > class A
> > ..
> > Map getFooMap()
> > void addFoo(B foo)
> >
> > Can i map A into
> > <a>
> > <foo name="name1" value="value1"/>
> > <foo name="name2" value="value2"/>
> > <foo name="name3" value="value3"/>
> > </a>
>
> (at the moment) betwixt always outputs map entries using the following
> format:
>
> <entry>
> <key>xxx</key>
> <value>yyy</value>
> <entry>
> it might be more difficult for object values maps since you'll need
> appropriate object->value conversion. it would make round tripping complex
> since you'd need a string -> object factory. it's not impossible but it'd
> need some thinking about. i'd be interested to hear other people views on
I solve this problem in the following way:
1. I create the following implementation of the Expression
public class MapValuesExpression implements Expression{
Expression expression;
public Object evaluate(Context context){
Object value = expression.evaluate(context);
if(value instanceof Map){
Map map = (Map)value;
value = map.values().iterator();
}
return value;
}
.....
}
2. In the main method
// Init
BeanWriter beanWriter = new BeanWriter(outputWriter);
XMLIntrospector introspector = beanWriter.getXMLIntrospector();
XMLBeanInfoRegistry registry = introspector.getRegistry();
// Take ElementDesciptor object
introspector.introspect(A.class);
ElementDescriptor fooMapProperty =
registry.get(A.class).getElementDescriptor().getElementDescriptors()[0];
ElementDescriptor fooProperty =
fooMapProperty.getElementDescriptors()[0];
fieldProperty.setContextExpression(
new MapValuesExpression(
new MethodExpression(
A.class.getMethod("getFooMap",new Class[]{})
)
) );
// Init a object and write it
A a = new A();
.......
beanWriter.write(a);
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