Hi,
I have a problem about using REST with JSON and GWT. I created a small web
service with Restlet simulating a lottery and I have a resource /tirages that
sends me all the drawings made since the last reset.
The GET method returns a container that contains all draws.
public class ContainerTirages implements Serializable {
private static final long serialVersionUID = 1L;
public List<Tirage> tirages_list;
public List<Tirage> getTirage_list() {
return tirages_list;
}
public void setTirage_list(List<Tirage> tirages_list) {
this.tirages_list = tirages_list;
}
public ContainerTirages() {
tirages_list = new ArrayList<Tirage>();
}
public ContainerTirages(List<Tirage> tirage_list) {
this.tirages_list = tirage_list;
}
}
public class Tirage implements Serializable {
private static final long serialVersionUID = 1L;
@Id Long Id;
private int noTirage;
private int[] numeros=new int[6];
private String dateHeure;
public int getNoTirage() {
return noTirage;
}
public void setNoTirage(int no) {
noTirage=no;
}
public int[] getNumeros() {
return numeros;
}
public void setNumeros(int[] num) {
for (int i=0 ; i<6 ; i++)
numeros[i]=num[i];
}
public String getDateHeure() {
return dateHeure;
}
public void setDateHeure(String dateTime) {
dateHeure=dateTime;
}
}
If I do not declare ContainerTirages as serializable, the server works
correctly and when I invoke this resource in any web brower, I get :
{"tirages_list":[{"numeros":[24,8,4,19,32,18],"noTirage":1,"dateHeure":"06/03/2012
10:13:03"},{"numeros":[15,23,1,41,22,37],"noTirage":2,"dateHeure":"06/03/2012
10:52:59" ...
But, in this case, The GWT client do not works correctly because
ContainerTriages is not serializable.
If I declare ContainerTirages as serializable, the client works correctly but
when I invoke this resource in any web brower, I get this strange result:
//OK[19,11,17,20,38,33,6,6,13,18,'Fo',4,3,27,20,13,41,35,39,6,6,12,17,'Fg',4,3,21,28,31,19,16,15,6,6,11,16,'FZ',4,3,27,2,28,3,47,29,6,6,10,15,'FS',4,3,26,47,17,6,46,27,6,6,9,14,'FL',4,3,25,46,9,15,18,22,6,6,8,13,'FA',4,3,5,46,2,18,...
I tried to put restlet.ext.gwt.jar after org.restlet.ext.jackson.jar in the
classpath. To do this, I wrote these lines in my server:
Engine.getInstance().getRegisteredConverters().clear();
Engine.getInstance().getRegisteredConverters().add(new JacksonConverter());
Engine.getInstance().getRegisteredConverters().add(new GwtConverter());
In this case, data obtained by calling the browser are correct, but the client
can't retrieve data and generates this error: "can not parse the enclosed
entity".
Do you have an explanation ?
Best regards
Vincent ROBERT
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