Ok, I'm stumped.
I want my sequence to be umarshaled as a Map so I'm trying to create an
XMLAdaptor so that I can unmarshal a sequence of tags into a Map.
E.g. unmarshal some XML:
----------------------------------
<config>
<field id="1">...</field>
<field id="2">...</field>
<field id="3">...</field>
<field id="4">...</field>
</config>
----------------------------------
into a class Config:
----------------------------------
@XmlRootElement(name = "config")
public class Config {
@XmlJavaTypeAdapter(FieldListAdapter.class)
@XmlElement(name = "field")
protected Map<String,Field> fields;
/* accessors omitted for brevity */
}
----------------------------------
With this adapter:
----------------------------------
public class FieldListAdapter extends XmlAdapter<Field[], Map<String,
Field>> {
public Map<String, Field> unmarshal(Field[] value) {
Map<String, Field> r = new HashMap<String, Field>();
for (Field c : value)
r.put(c.getId(), c);
return r;
}
public Field[] marshal(Map<String, Field> value) {
return value.values().toArray(new Field[value.size()]);
}
}
----------------------------------
So my adapter unmarshal method gets called but 'value' is empty. Why?
If I change my Config class to use a List instead of a Map and take away
the adapter the data gets unmarshaled so I know it's not my XML.
I even tried creating an adapter to convert Field[] to List<Field> but
value is still empty.
Cleary JAXB can do it on it's own, so why can't I? Am I just doing
something wrong or is what I want impossible?
Thanks for your help.
-Matthew
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