[ONOS-4409] Merge getApp REST methods into one, revise unit test

Change-Id: I47e5dd1d795404d3ba2c73487858a3d389790ac9

@@ -166,34 +166,25 @@ public class ApplicationsWebResource extends AbstractWebResource {
     }
 
     /**
-     * Gets application Id entry by short id.
-     *
-     * @param shortId numerical id of application
-     * @return 200 OK; 404; 401
-     * @onos.rsModel ApplicationId
-     */
-    @GET
-    @Produces(MediaType.APPLICATION_JSON)
-    @Path("ids/short")
-    public Response getAppIdByShortId(@QueryParam("id") int shortId) {
-        CoreService service = get(CoreService.class);
-        ApplicationId appId = service.getAppId((short) shortId);
-        return response(appId);
-    }
-
-    /**
-     * Gets application Id entry by name.
+     * Gets applicationId entry by either id or name.
      *
+     * @param id   id of application
      * @param name name of application
      * @return 200 OK; 404; 401
      * @onos.rsModel ApplicationId
      */
     @GET
     @Produces(MediaType.APPLICATION_JSON)
-    @Path("ids/name")
-    public Response getAppIdByName(@QueryParam("name") String name) {
+    @Path("ids/entry")
+    public Response getAppIdByName(@QueryParam("id") Short id,
+                                   @QueryParam("name") String name) {
         CoreService service = get(CoreService.class);
-        ApplicationId appId = service.getAppId(name);
+        ApplicationId appId = null;
+        if (id != null) {
+            appId = service.getAppId(id);
+        } else if (name != null) {
+            appId = service.getAppId(name);
+        }
         return response(appId);
     }
 

@@ -22,6 +22,7 @@ import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableSet;
 import org.hamcrest.Description;
 import org.hamcrest.TypeSafeMatcher;
+import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
 import org.onlab.osgi.ServiceDirectory;
@@ -42,6 +43,7 @@ import org.onosproject.core.DefaultApplication;
 import org.onosproject.core.DefaultApplicationId;
 import org.onosproject.core.Version;
 
+import javax.ws.rs.NotFoundException;
 import javax.ws.rs.client.Entity;
 import javax.ws.rs.client.WebTarget;
 import javax.ws.rs.core.MediaType;
@@ -487,8 +489,8 @@ public class ApplicationsResourceTest extends ResourceTest {
         replay(coreService);
 
         WebTarget wt = target();
-        String response = wt.path("applications/ids/short")
-                            .queryParam("id", 1).request().get(String.class);
+        String response = wt.path("applications/ids/entry")
+                .queryParam("id", 1).request().get(String.class);
 
         JsonObject result = Json.parse(response).asObject();
         assertThat(result, notNullValue());
@@ -507,7 +509,7 @@ public class ApplicationsResourceTest extends ResourceTest {
         replay(coreService);
 
         WebTarget wt = target();
-        String response = wt.path("applications/ids/name")
+        String response = wt.path("applications/ids/entry")
                 .queryParam("name", "app2").request().get(String.class);
 
         JsonObject result = Json.parse(response).asObject();
@@ -517,4 +519,19 @@ public class ApplicationsResourceTest extends ResourceTest {
 
         verify(coreService);
     }
+
+    /**
+     * Tests a GET of an applicationId without specifying any parameters.
+     */
+    @Test
+    public void getAppWithNoParam() {
+        WebTarget wt = target();
+
+        try {
+            wt.path("applications/ids/entry").request().get();
+        } catch (NotFoundException ex) {
+            Assert.assertThat(ex.getMessage(),
+                    containsString("HTTP 404 Not Found"));
+        }
+    }
 }