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xmlxstream

XStream parse attributes and values at the same time


I have the following XML

<search ver="3.0">
    <loc id="ARBA0009" type="1">Buenos Aires, Argentina</loc>
    <loc id="BRXX1283" type="1">Buenos Aires, Brazil</loc>
    <loc id="ARDF0127" type="1">Aeroparque Buenos Aires, Argentina</loc>
    <loc id="MXJO0669" type="1">Concepcion De Buenos Aires, Mexico</loc>
    <loc id="MXPA1785" type="1">San Nicolas De Buenos Aires, Mexico</loc>
    <loc id="ARBA0005" type="1">Balcarce, Argentina</loc>
    <loc id="ARBA0008" type="1">Bragado, Argentina</loc>
    <loc id="ARBA0010" type="1">Campana, Argentina</loc>
    <loc id="ARBA0016" type="1">Chascomus, Argentina</loc>
    <loc id="ARBA0019" type="1">Chivilcoy, Argentina</loc>
</search>

And a City class

public class City {

    private String  id;
    private Integer type;
    private String  name;

    // getters & setters...
}

I tried the following aliases to parse the XML

xStream.alias("search", List.class);
xStream.alias("loc", City.class);
xStream.useAttributeFor("id", String.class);
xStream.useAttributeFor("type", Integer.class);

But I can't figure out how to set the value of the "loc" tag, if I try to transform the City object in XML I get

<search>
    <loc id="ARBA0001" type="1">
        <name>Buenos Aires</name>
    </loc>
</search>

When I really need to get this

<search>
    <loc id="ARBA0001" type="1">Buenos Aires</loc>
</search>

Then, if I try to parse the XML to a City object I get the field "name" with a null value.

Anybody knows how to set te correct aliases to do this? Thanks in advance.


Solution

  • I finally found the solution, a Converter solves this, here is the code

    public class CityConverter implements Converter {
    
        public void marshal(Object value, HierarchicalStreamWriter writer, 
                                                                   MarshallingContext context) {
            City city = (City) value;
            writer.addAttribute("id", city.getId());
            writer.addAttribute("type", city.getType().toString());
            writer.setValue(city.getName());
        }
    
        public Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext context) {
            City city = new City();
            city.setName(reader.getValue());
            city.setId(reader.getAttribute("id"));
            city.setType(reader.getAttribute("type"));
            return city;
        }
    
        public boolean canConvert(Class clazz) {
            return clazz.equals(City.class);
        }
    
    }
    

    And in the part of setting the aliases I also set up the CityConverter

    xStream.registerConverter(new CityConverter());
    xStream.alias("search", List.class);
    xStream.alias("loc", City.class);
    

    And all works fine :)