Question

Here is what I am trying to do:

@POST
@Path("/MyPath")
@Produces("text/xml")
@RolesAllowed({"user"})
public Output myMethod (@QueryParam("itemId") long ItemId, 
                                    @QueryParam("plannedstartdate") Calendar plannedStartDate, 
                                    @QueryParam("plannedreturndate") Calendar plannedReturnDate)

I am using JBoss AS7. As far as I understan, resteasy is integrated into JBoss AS7. I am able to run simple rest services.

The only documentation I found about passing dates is at the link :
http://docs.jboss.org/resteasy/2.0.0.GA/userguide/html/StringConverter.html#StringParamUnmarshaller

I am not able to follow this and fix the issue as the instructions are not clear.
When I try to create an annotation DateFormat as given in the example, it does not recognize StringParamUnmarshaller. I don’t know where to get it from. If resteasy is already integrated into JBoss AS7, is this not supposed to be recognized?

My pom.xml has the following dependency:

  <!-- Import the JAX-RS API, we use provided scope as the API is included 
     in JBoss AS 7 -->
  <dependency>
     <groupId>org.jboss.spec.javax.ws.rs</groupId>
     <artifactId>jboss-jaxrs-api_1.1_spec</artifactId>
     <scope>provided</scope>
  </dependency>

The calls to this method fail as the String to Calendar conversion does not happen. I dont want to pass String instead of Calendar as there are other clients that make java call directly. Can anyone help with how I can pass dates to Rest Calls?

Thanks
Veer

Answer 1

This issue is resolved. See the following code.

Create an Annotation class CalendarFormat.java:

@Retention(RUNTIME)
@StringParameterUnmarshallerBinder(CalendarFormatter.class)
public @interface CalendarFormat {
    String value();
}

Add a class CalendarFormatter.java:

public class CalendarFormatter implements StringParameterUnmarshaller<Calendar> {
    private SimpleDateFormat formatter;

    public void setAnnotations(Annotation[] annotations) {
        CalendarFormat format = FindAnnotation.findAnnotation(annotations, CalendarFormat.class);
        formatter = new SimpleDateFormat(format.value());
    }

    public Calendar fromString(String str) {
        try {
            Calendar cal = Calendar.getInstance();
            cal.setTime(formatter.parse(str));
            return cal;
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    }
}

Add to POM

<dependency>
    <groupId>org.jboss.resteasy</groupId>
    <artifactId>resteasy-jaxrs</artifactId>
    <version>2.3.3.Final</version>
    <scope>provided</scope>
</dependency>

<dependency>
    <groupId>org.jboss.resteasy</groupId>
    <artifactId>resteasy-multipart-provider</artifactId>
    <version>2.3.4.Final</version>
    <exclusions>
        <exclusion>
            <artifactId>resteasy-jaxrs</artifactId>
            <groupId>org.jboss.resteasy</groupId>
        </exclusion>
    </exclusions>
</dependency>

Change the method signature to use the annotation

@POST
@Path("/MyPath")
@Produces("text/xml")
@RolesAllowed({"user"})
public Output myMethod(@QueryParam("itemId") long ItemId,            
        @QueryParam("plannedstartdate") @CalendarFormat("MM-dd-yyyy") Calendar plannedStartDate, 
        @QueryParam("plannedreturndate") @CalendarFormat("MM-dd-yyyy") Calendar plannedReturnDate)

That’s it.