adding get location api witch was missing from previous emm versions

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/RoleManagementServiceImpl.java

@@ -30,37 +30,20 @@ import org.wso2.carbon.device.mgt.jaxrs.service.impl.util.FilteringUtil;
 import org.wso2.carbon.device.mgt.jaxrs.service.impl.util.RequestValidationUtil;
 import org.wso2.carbon.device.mgt.jaxrs.util.DeviceMgtAPIUtils;
 import org.wso2.carbon.device.mgt.jaxrs.util.SetReferenceTransformer;
-import org.wso2.carbon.user.api.AuthorizationManager;
-import org.wso2.carbon.user.api.Permission;
-import org.wso2.carbon.user.api.UserRealm;
-import org.wso2.carbon.user.api.UserStoreException;
-import org.wso2.carbon.user.api.UserStoreManager;
+import org.wso2.carbon.user.api.*;
 import org.wso2.carbon.user.core.common.AbstractUserStoreManager;
 import org.wso2.carbon.user.mgt.UserRealmProxy;
 import org.wso2.carbon.user.mgt.common.UIPermissionNode;
 import org.wso2.carbon.user.mgt.common.UserAdminException;
 
-import javax.ws.rs.Consumes;
-import javax.ws.rs.DELETE;
-import javax.ws.rs.GET;
-import javax.ws.rs.HeaderParam;
-import javax.ws.rs.POST;
-import javax.ws.rs.PUT;
-import javax.ws.rs.Path;
-import javax.ws.rs.PathParam;
-import javax.ws.rs.Produces;
-import javax.ws.rs.QueryParam;
+import javax.ws.rs.*;
 import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
 import java.io.UnsupportedEncodingException;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.net.URLEncoder;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Set;
+import java.util.*;
 
 import static org.wso2.carbon.device.mgt.jaxrs.util.Constants.PRIMARY_USER_STORE;
 
@@ -105,6 +88,46 @@ public class RoleManagementServiceImpl implements RoleManagementService {
         }
     }
 
+    @Override
+    public Response getFilteredRoles(
+            @PathParam("prefix") String prefix,
+            @QueryParam("filter") String filter,
+            @QueryParam("user-store") String userStore,
+            @HeaderParam("If-Modified-Since") String ifModifiedSince,
+            @QueryParam("offset") int offset, @QueryParam("limit") int limit) {
+        RequestValidationUtil.validatePaginationParameters(offset, limit);
+        List<String> finalRoleList;
+        RoleList targetRoles = new RoleList();
+
+        //if user store is null set it to primary
+        if (userStore == null || "".equals(userStore)) {
+            userStore = PRIMARY_USER_STORE;
+        }
+
+        try {
+
+            //Get the total role count that matches the given filter
+            List<String> filteredRoles = getRolesFromUserStore(filter, userStore);
+            finalRoleList = new ArrayList<String>();
+            targetRoles.setCount(filteredRoles.size());
+
+            filteredRoles = FilteringUtil.getFilteredList(getRolesFromUserStore(filter, userStore), offset, limit);
+            for (String rolename : filteredRoles){
+                if (rolename.startsWith(prefix)){
+                    finalRoleList.add(rolename);
+                }
+            }
+            targetRoles.setList(finalRoleList);
+
+            return Response.ok().entity(targetRoles).build();
+        } catch (UserStoreException e) {
+            String msg = "Error occurred while retrieving roles from the underlying user stores";
+            log.error(msg, e);
+            return Response.serverError().entity(
+                    new ErrorResponse.ErrorResponseBuilder().setMessage(msg).build()).build();
+        }
+    }
+
     @GET
     @Path("/{roleName}/permissions")
     @Override