Jersey JAX-RS - matching regular expression

Question

I have the following resources:

rounds resource

@Path("/rounds")
public class RoundResource {
  RoundService roundService = new RoundService();

    @Path("{roundUri}/matches")
    public MatchResource getMatchResource() {
        return new MatchResource();
    }
}

teams resource

@Path("/teams")
public class TeamResource {
    TeamService teamService = new TeamService();

    @Path("/{teamUri}/matches")
    public MatchResource getMatchResource() {
        return new MatchResource();
    }
}

matches resource

@Path("/matches")
public class MatchResource {
    private MatchService matchService = new MatchService();

    @GET
    @Produces(MediaType.APPLICATION_JSON)
    public List<Match> getTeamMatches(@PathParam("teamUri") String teamUri) {
        return matchService.getTeamMatches(teamUri);
    }

    @GET
    @Produces(MediaType.APPLICATION_JSON)
    public List<Match> getRoundMatches(@PathParam("roundUri") String roundUri) {
        return matchService.getRoundMatches(roundUri);
    }
}

Where

/rounds/{roundUri}/matches 

gets the matches of a round

/teams/{teamUri}/matches 

gets the matches of a team

I got the matching regular expression error because the path in matches resource is /matches and both paths end with it. How to solve it?

Answer 1

The problem is in your matches resource . The two methods map to same url i,e

/matches So if you are not giving any @Path annotation to the methods then only one method should be there to avoid collision or give @Path annotation to either one of them or to both of them . it will work

I don't see why you have mentioned regular expression in your question . When the question you are asking is nothing related to regular expression .

Anyway to give pattern for path parameters you can add code like this

@Path("method1/{parameter1: [a-zA-Z][a-zA-Z_0-9]*}") // this regular  expression is for alphanumeric

you should have both @Path annotation on method and @PathParam annotation on argument to work properly

you should code like this in your matches resource

@Path("{teamUri}")

and

@Path("/roundUri/{roundUri}") 

on your methods to work

this will work for urls like /matches/xxxdf and /matches/roundUri/xalfo

change your code like this it will work

@Path("/matches")
public class MatchResource {
private MatchService matchService = new MatchService();

@GET
@Path("{teamUri}")
 //or  @Path("{teamUri:[a-zA-Z][a-zA-Z_0-9]*}") if you want to use regular expressions
@Produces(MediaType.APPLICATION_JSON)
public List<Match> getTeamMatches(@PathParam("teamUri") String teamUri) {
    return matchService.getTeamMatches(teamUri);
}

@GET
@Path("roundUri/{roudUri}")
  //or  @Path("{roundUri:[a-zA-Z][a-zA-Z_0-9]*}") if you want to use regular expressions
@Produces(MediaType.APPLICATION_JSON)
public List<Match> getRoundMatches(@PathParam("roundUri") String roundUri) {
    return matchService.getRoundMatches(roundUri);
}
}

The point here is your url for resources should not clash

Answer 2

I added @Path(" OPTION ") annotation to the match resource methods to specify if I want the matches by round or by team:

rounds resource

@Path("/rounds")
public class RoundResource {
  RoundService roundService = new RoundService();

    @Path("{roundUri}/matches")
    public MatchResource getMatchResource() {
        return new MatchResource();
    }
}

teams resource

@Path("/teams")
public class TeamResource {
    TeamService teamService = new TeamService();

    @Path("/{teamUri}/matches")
    public MatchResource getMatchResource() {
        return new MatchResource();
    }
}

matches resource

@Path("/matches")
public class MatchResource {
    private MatchService matchService = new MatchService();

    @GET
    @Path("/byteam")
    @Produces(MediaType.APPLICATION_JSON)
    public List<Match> getTeamMatches(@PathParam("teamUri") String teamUri) {
        return matchService.getTeamMatches(teamUri);
    }

    @GET
    @Path("/byround")
    @Produces(MediaType.APPLICATION_JSON)
    public List<Match> getRoundMatches(@PathParam("roundUri") String roundUri) {
        return matchService.getRoundMatches(roundUri);
    }
}

Now I have:

/rounds/{roundUri}/matches/byround 

gets the matches of a round

/teams/{teamUri}/matches/byteam 

gets the matches of a team