I have something like
@XmlElementWrapper(name="Mylist")
List<Items> myItems = new ArrayList<Items>()
and that comes out like
<Mylist>
<myItems>item 1</myItems>
<myItems>item 2</myItems>
<myItems>item 3</myItems>
</Mylist>
Is it possible to make this come out more like
<Mylist>
<myItems>item 1, item 2, item 3</myItems>
</Mylist>
Since the data I am after is all just textual anyway?
You can use @XmlList to make it a space separated value.
For a comma separated list you will need to use an XmlAdapter. For more information on XmlAdapter see:
Here's an XmlAdapter to handle comma separated lists:
import java.util.ArrayList;
import java.util.List;
import javax.xml.bind.annotation.adapters.XmlAdapter;
public class CommaSeparatedListAdapter extends XmlAdapter<String, List<String>> {
@Override
public List<String> unmarshal(final String string) {
final List<String> strings = new ArrayList<String>();
for (final String s : string.split(",")) {
final String trimmed = s.trim();
if (trimmed.length() > 0) {
strings.add(trimmed);
}
}
return strings;
}
@Override
public String marshal(final List<String> strings) {
final StringBuilder sb = new StringBuilder();
for (final String string : strings) {
if (sb.length() > 0) {
sb.append(", ");
}
sb.append(string);
}
return sb.toString();
}
}
You would use it like this:
@XmlElementWrapper(name="Mylist")
@XmlJavaTypeAdapter(CommaSeparatedListAdapter.class)
List<Items> myItems = new ArrayList<Items>()
you can accomplish that by making the field transient @XmlTransient and creating a method for calculating a String with a comma-separated.
@XmlTransient
List<Items> myItems = new ArrayList<Items>()
@XmlElement(name = "myItems")
public String getItemsAsCommasSeparated() {
return String.join(", ", myItems);
}
About the wrapping <Mylist> if it is really necessary you will have to wrap the list into a another object.
