gerrit.onap Code Review - ccsdk/oran.git/blob

   1 /*-
   2  * ========================LICENSE_START=================================
   3  * ONAP : ccsdk oran
   4  * ======================================================================
   5  * Copyright (C) 2019-2020 Nordix Foundation. All rights reserved.
   6  * ======================================================================
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ========================LICENSE_END===================================
  19  */
  20
  21 package org.onap.ccsdk.oran.a1policymanagementservice.controllers.v2;
  22
  23 import com.google.gson.Gson;
  24 import com.google.gson.GsonBuilder;
  25
  26 import io.swagger.annotations.Api;
  27 import io.swagger.annotations.ApiOperation;
  28 import io.swagger.annotations.ApiParam;
  29 import io.swagger.annotations.ApiResponse;
  30 import io.swagger.annotations.ApiResponses;
  31
  32 import java.lang.invoke.MethodHandles;
  33 import java.time.Instant;
  34 import java.util.ArrayList;
  35 import java.util.Collection;
  36 import java.util.List;
  37
  38 import lombok.Getter;
  39
  40 import org.onap.ccsdk.oran.a1policymanagementservice.clients.A1ClientFactory;
  41 import org.onap.ccsdk.oran.a1policymanagementservice.controllers.VoidResponse;
  42 import org.onap.ccsdk.oran.a1policymanagementservice.exceptions.ServiceException;
  43 import org.onap.ccsdk.oran.a1policymanagementservice.repository.ImmutablePolicy;
  44 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Lock.LockType;
  45 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Policies;
  46 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Policy;
  47 import org.onap.ccsdk.oran.a1policymanagementservice.repository.PolicyType;
  48 import org.onap.ccsdk.oran.a1policymanagementservice.repository.PolicyTypes;
  49 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Ric;
  50 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Rics;
  51 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Service;
  52 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Services;
  53 import org.slf4j.Logger;
  54 import org.slf4j.LoggerFactory;
  55 import org.springframework.beans.factory.annotation.Autowired;
  56 import org.springframework.http.HttpStatus;
  57 import org.springframework.http.MediaType;
  58 import org.springframework.http.ResponseEntity;
  59 import org.springframework.web.bind.annotation.DeleteMapping;
  60 import org.springframework.web.bind.annotation.GetMapping;
  61 import org.springframework.web.bind.annotation.PutMapping;
  62 import org.springframework.web.bind.annotation.RequestBody;
  63 import org.springframework.web.bind.annotation.RequestParam;
  64 import org.springframework.web.bind.annotation.RestController;
  65 import org.springframework.web.reactive.function.client.WebClientResponseException;
  66 import reactor.core.publisher.Mono;
  67
  68 @RestController("PolicyControllerV2")
  69 @Api(tags = {Consts.V2_API_NAME}, description = "Policy management")
  70 public class PolicyController {
  71
  72     public static class RejectionException extends Exception {
  73         private static final long serialVersionUID = 1L;
  74
  75         @Getter
  76         private final HttpStatus status;
  77
  78         public RejectionException(String message, HttpStatus status) {
  79             super(message);
  80             this.status = status;
  81         }
  82     }
  83
  84     @Autowired
  85     private Rics rics;
  86     @Autowired
  87     private PolicyTypes policyTypes;
  88     @Autowired
  89     private Policies policies;
  90     @Autowired
  91     private A1ClientFactory a1ClientFactory;
  92     @Autowired
  93     private Services services;
  94
  95     private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
  96     private static Gson gson = new GsonBuilder() //
  97         .serializeNulls() //
  98         .create(); //
  99
 100     @GetMapping(path = Consts.V2_API_ROOT + "/policy-schemas", produces = MediaType.APPLICATION_JSON_VALUE)
 101     @ApiOperation(value = "Returns policy type schema definitions")
 102     @ApiResponses(
 103         value = { //
 104             @ApiResponse(code = 200, message = "Policy schemas", response = PolicySchemaList.class), //
 105             @ApiResponse(code = 404, message = "Near-RT RIC is not found", response = ErrorResponse.ErrorInfo.class)})
 106     public ResponseEntity<Object> getPolicySchemas( //
 107         @ApiParam(
 108             name = Consts.RIC_ID_PARAM,
 109             required = false,
 110             value = "The identity of the Near-RT RIC to get the definitions for.") //
 111         @RequestParam(name = Consts.RIC_ID_PARAM, required = false) String ricId,
 112         @ApiParam(
 113             name = Consts.POLICY_TYPE_ID_PARAM,
 114             required = true,
 115             value = "The identity of the policy type to get the definition for. When this parameter is given, max one schema will be returned") //
 116         @RequestParam(name = Consts.POLICY_TYPE_ID_PARAM, required = false) String policyTypeId) {
 117         try {
 118             Ric ric = ricId == null ? null : rics.getRic(ricId);
 119             if (ric == null && policyTypeId == null) {
 120                 Collection<PolicyType> types = this.policyTypes.getAll();
 121                 return new ResponseEntity<>(toPolicyTypeSchemasJson(types), HttpStatus.OK);
 122             } else if (ric != null && policyTypeId != null) {
 123                 synchronized (ric) {
 124                     assertRicStateIdleSync(ric);
 125                     Collection<PolicyType> types = new ArrayList<>();
 126                     if (rics.getRic(ricId).isSupportingType(policyTypeId)) {
 127                         types.add(policyTypes.getType(policyTypeId));
 128                     }
 129                     return new ResponseEntity<>(toPolicyTypeSchemasJson(types), HttpStatus.OK);
 130                 }
 131             } else if (ric != null) {
 132                 synchronized (ric) {
 133                     assertRicStateIdleSync(ric);
 134                     Collection<PolicyType> types = rics.getRic(ricId).getSupportedPolicyTypes();
 135                     return new ResponseEntity<>(toPolicyTypeSchemasJson(types), HttpStatus.OK);
 136                 }
 137             } else {
 138                 Collection<PolicyType> types = new ArrayList<>();
 139                 types.add(policyTypes.getType(policyTypeId));
 140                 return new ResponseEntity<>(toPolicyTypeSchemasJson(types), HttpStatus.OK);
 141             }
 142         } catch (ServiceException e) {
 143             return ErrorResponse.create(e, HttpStatus.NOT_FOUND);
 144         }
 145     }
 146
 147     @GetMapping(path = Consts.V2_API_ROOT + "/policy-types", produces = MediaType.APPLICATION_JSON_VALUE)
 148     @ApiOperation(value = "Query policy type identities", produces = MediaType.APPLICATION_JSON_VALUE)
 149     @ApiResponses(
 150         value = {@ApiResponse(code = 200, message = "Policy type IDs", response = PolicyTypeIdList.class),
 151             @ApiResponse(code = 404, message = "Near-RT RIC is not found", response = ErrorResponse.ErrorInfo.class)})
 152     public ResponseEntity<Object> getPolicyTypes( //
 153         @ApiParam(
 154             name = Consts.RIC_ID_PARAM,
 155             required = false,
 156             value = "The identity of the Near-RT RIC to get types for.") //
 157         @RequestParam(name = Consts.RIC_ID_PARAM, required = false) String ricId) {
 158         if (ricId == null) {
 159             Collection<PolicyType> types = this.policyTypes.getAll();
 160             return new ResponseEntity<>(toPolicyTypeIdsJson(types), HttpStatus.OK);
 161         } else {
 162             try {
 163                 Collection<PolicyType> types = rics.getRic(ricId).getSupportedPolicyTypes();
 164                 return new ResponseEntity<>(toPolicyTypeIdsJson(types), HttpStatus.OK);
 165             } catch (ServiceException e) {
 166                 return ErrorResponse.create(e, HttpStatus.NOT_FOUND);
 167             }
 168         }
 169     }
 170
 171     @GetMapping(path = Consts.V2_API_ROOT + "/policy", produces = MediaType.APPLICATION_JSON_VALUE)
 172     @ApiOperation(value = "Returns a policy configuration") //
 173     @ApiResponses(
 174         value = { //
 175             @ApiResponse(code = 200, message = "Policy found", response = JsonObject.class), //
 176             @ApiResponse(code = 404, message = "Policy is not found", response = ErrorResponse.ErrorInfo.class)} //
 177     )
 178     public ResponseEntity<Object> getPolicy( //
 179         @ApiParam(name = Consts.POLICY_ID_PARAM, required = true, value = "The identity of the policy instance.") //
 180         @RequestParam(name = Consts.POLICY_ID_PARAM, required = true) String id) {
 181         try {
 182             Policy p = policies.getPolicy(id);
 183             return new ResponseEntity<>(p.json(), HttpStatus.OK);
 184         } catch (ServiceException e) {
 185             return ErrorResponse.create(e, HttpStatus.NOT_FOUND);
 186         }
 187     }
 188
 189     @DeleteMapping(Consts.V2_API_ROOT + "/policy")
 190     @ApiOperation(value = "Delete a policy")
 191     @ApiResponses(
 192         value = { //
 193             @ApiResponse(code = 200, message = "Not used", response = VoidResponse.class),
 194             @ApiResponse(code = 204, message = "Policy deleted", response = VoidResponse.class),
 195             @ApiResponse(code = 404, message = "Policy is not found", response = ErrorResponse.ErrorInfo.class),
 196             @ApiResponse(
 197                 code = 423,
 198                 message = "Near-RT RIC is not operational",
 199                 response = ErrorResponse.ErrorInfo.class)})
 200     public Mono<ResponseEntity<Object>> deletePolicy( //
 201         @ApiParam(name = Consts.POLICY_ID_PARAM, required = true, value = "The identity of the policy instance.") //
 202         @RequestParam(name = Consts.POLICY_ID_PARAM, required = true) String id) {
 203         try {
 204             Policy policy = policies.getPolicy(id);
 205             keepServiceAlive(policy.ownerServiceId());
 206             Ric ric = policy.ric();
 207             return ric.getLock().lock(LockType.SHARED) //
 208                 .flatMap(notUsed -> assertRicStateIdle(ric)) //
 209                 .flatMap(notUsed -> a1ClientFactory.createA1Client(policy.ric())) //
 210                 .doOnNext(notUsed -> policies.remove(policy)) //
 211                 .flatMap(client -> client.deletePolicy(policy)) //
 212                 .doOnNext(notUsed -> ric.getLock().unlockBlocking()) //
 213                 .doOnError(notUsed -> ric.getLock().unlockBlocking()) //
 214                 .flatMap(notUsed -> Mono.just(new ResponseEntity<>(HttpStatus.NO_CONTENT)))
 215                 .onErrorResume(this::handleException);
 216         } catch (ServiceException e) {
 217             return ErrorResponse.createMono(e, HttpStatus.NOT_FOUND);
 218         }
 219     }
 220
 221     @PutMapping(path = Consts.V2_API_ROOT + "/policy", produces = MediaType.APPLICATION_JSON_VALUE)
 222     @ApiOperation(value = "Create or update a policy")
 223     @ApiResponses(
 224         value = { //
 225             @ApiResponse(code = 201, message = "Policy created", response = VoidResponse.class), //
 226             @ApiResponse(code = 200, message = "Policy updated", response = VoidResponse.class), //
 227             @ApiResponse(
 228                 code = 423,
 229                 message = "Near-RT RIC is not operational",
 230                 response = ErrorResponse.ErrorInfo.class), //
 231             @ApiResponse(
 232                 code = 404,
 233                 message = "Near-RT RIC or policy type is not found",
 234                 response = ErrorResponse.ErrorInfo.class) //
 235         })
 236     public Mono<ResponseEntity<Object>> putPolicy( //
 237         @ApiParam(name = Consts.POLICY_TYPE_ID_PARAM, required = false, value = "The identity of the policy type.") //
 238         @RequestParam(name = Consts.POLICY_TYPE_ID_PARAM, required = false, defaultValue = "") String policyTypeId, //
 239         @ApiParam(name = Consts.POLICY_ID_PARAM, required = true, value = "The identity of the policy instance.") //
 240         @RequestParam(name = Consts.POLICY_ID_PARAM, required = true) String instanceId, //
 241         @ApiParam(
 242             name = Consts.RIC_ID_PARAM,
 243             required = true,
 244             value = "The identity of the Near-RT RIC where the policy will be " + //
 245                 "created.") //
 246         @RequestParam(name = Consts.RIC_ID_PARAM, required = true) String ricId, //
 247         @ApiParam(
 248             name = Consts.SERVICE_ID_PARAM,
 249             required = true,
 250             value = "The identity of the service creating the policy.") //
 251         @RequestParam(name = Consts.SERVICE_ID_PARAM, required = true) String serviceId, //
 252         @ApiParam(
 253             name = Consts.TRANSIENT_PARAM,
 254             required = false,
 255             value = "If the policy is transient or not (boolean " + //
 256                 "defaulted to false). A policy is transient if it will not be recreated in the Near-RT RIC " + //
 257                 "when it has been lost (for instance due to a restart)") //
 258         @RequestParam(name = Consts.TRANSIENT_PARAM, required = false, defaultValue = "false") boolean isTransient, //
 259         @RequestBody Object jsonBody) {
 260
 261         String jsonString = gson.toJson(jsonBody);
 262         Ric ric = rics.get(ricId);
 263         PolicyType type = policyTypes.get(policyTypeId);
 264         keepServiceAlive(serviceId);
 265         if (ric == null || type == null) {
 266             return ErrorResponse.createMono("Near-RT RIC or policy type not found", HttpStatus.NOT_FOUND);
 267         }
 268         Policy policy = ImmutablePolicy.builder() //
 269             .id(instanceId) //
 270             .json(jsonString) //
 271             .type(type) //
 272             .ric(ric) //
 273             .ownerServiceId(serviceId) //
 274             .lastModified(Instant.now()) //
 275             .isTransient(isTransient) //
 276             .build();
 277
 278         final boolean isCreate = this.policies.get(policy.id()) == null;
 279
 280         return ric.getLock().lock(LockType.SHARED) //
 281             .flatMap(notUsed -> assertRicStateIdle(ric)) //
 282             .flatMap(notUsed -> checkSupportedType(ric, type)) //
 283             .flatMap(notUsed -> validateModifiedPolicy(policy)) //
 284             .flatMap(notUsed -> a1ClientFactory.createA1Client(ric)) //
 285             .flatMap(client -> client.putPolicy(policy)) //
 286             .doOnNext(notUsed -> policies.put(policy)) //
 287             .doOnNext(notUsed -> ric.getLock().unlockBlocking()) //
 288             .doOnError(trowable -> ric.getLock().unlockBlocking()) //
 289             .flatMap(notUsed -> Mono.just(new ResponseEntity<>(isCreate ? HttpStatus.CREATED : HttpStatus.OK))) //
 290             .onErrorResume(this::handleException);
 291     }
 292
 293     private Mono<ResponseEntity<Object>> handleException(Throwable throwable) {
 294         if (throwable instanceof WebClientResponseException) {
 295             WebClientResponseException e = (WebClientResponseException) throwable;
 296             return ErrorResponse.createMono(e.getResponseBodyAsString(), e.getStatusCode());
 297         } else if (throwable instanceof RejectionException) {
 298             RejectionException e = (RejectionException) throwable;
 299             return ErrorResponse.createMono(e.getMessage(), e.getStatus());
 300         } else {
 301             return ErrorResponse.createMono(throwable.getMessage(), HttpStatus.INTERNAL_SERVER_ERROR);
 302         }
 303     }
 304
 305     private Mono<Object> validateModifiedPolicy(Policy policy) {
 306         // Check that ric is not updated
 307         Policy current = this.policies.get(policy.id());
 308         if (current != null && !current.ric().id().equals(policy.ric().id())) {
 309             RejectionException e = new RejectionException("Policy cannot change RIC, policyId: " + current.id() + //
 310                 ", RIC ID: " + current.ric().id() + //
 311                 ", new ID: " + policy.ric().id(), HttpStatus.CONFLICT);
 312             logger.debug("Request rejected, {}", e.getMessage());
 313             return Mono.error(e);
 314         }
 315         return Mono.just("{}");
 316     }
 317
 318     private Mono<Object> checkSupportedType(Ric ric, PolicyType type) {
 319         if (!ric.isSupportingType(type.id())) {
 320             logger.debug("Request rejected, type not supported, RIC: {}", ric);
 321             RejectionException e = new RejectionException("Type: " + type.id() + " not supported by RIC: " + ric.id(),
 322                 HttpStatus.NOT_FOUND);
 323             return Mono.error(e);
 324         }
 325         return Mono.just("{}");
 326     }
 327
 328     private void assertRicStateIdleSync(Ric ric) throws ServiceException {
 329         if (ric.getState() != Ric.RicState.AVAILABLE) {
 330             throw new ServiceException("Near-RT RIC: " + ric.id() + " is " + ric.getState());
 331         }
 332     }
 333
 334     private Mono<Object> assertRicStateIdle(Ric ric) {
 335         if (ric.getState() == Ric.RicState.AVAILABLE) {
 336             return Mono.just("{}");
 337         } else {
 338             logger.debug("Request rejected Near-RT RIC not IDLE, ric: {}", ric);
 339             RejectionException e = new RejectionException(
 340                 "Near-RT RIC: is not operational, id: " + ric.id() + ", state: " + ric.getState(), HttpStatus.LOCKED);
 341             return Mono.error(e);
 342         }
 343     }
 344
 345     static final String GET_POLICIES_QUERY_DETAILS =
 346         "Returns a list of A1 policies matching given search criteria. <br>" //
 347             + "If several query parameters are defined, the policies matching all conditions are returned.";
 348
 349     @GetMapping(path = Consts.V2_API_ROOT + "/policies", produces = MediaType.APPLICATION_JSON_VALUE)
 350     @ApiOperation(value = "Query for existing A1 policies", notes = GET_POLICIES_QUERY_DETAILS)
 351     @ApiResponses(
 352         value = { //
 353             @ApiResponse(code = 200, message = "Policies", response = PolicyInfoList.class),
 354             @ApiResponse(
 355                 code = 404,
 356                 message = "Near-RT RIC, policy type or service not found",
 357                 response = ErrorResponse.ErrorInfo.class)})
 358     public ResponseEntity<Object> getPolicies( //
 359         @ApiParam(
 360             name = Consts.POLICY_TYPE_ID_PARAM,
 361             required = false,
 362             value = "The identity of the policy type to get policies for.") //
 363         @RequestParam(name = Consts.POLICY_TYPE_ID_PARAM, required = false) String type, //
 364         @ApiParam(
 365             name = Consts.RIC_ID_PARAM,
 366             required = false,
 367             value = "The identity of the Near-RT RIC to get policies for.") //
 368         @RequestParam(name = Consts.RIC_ID_PARAM, required = false) String ric, //
 369         @ApiParam(
 370             name = Consts.SERVICE_ID_PARAM,
 371             required = false,
 372             value = "The identity of the service to get policies for.") //
 373         @RequestParam(name = Consts.SERVICE_ID_PARAM, required = false) String service) //
 374     {
 375         if ((type != null && this.policyTypes.get(type) == null)) {
 376             return ErrorResponse.create("Policy type not found", HttpStatus.NOT_FOUND);
 377         }
 378         if ((ric != null && this.rics.get(ric) == null)) {
 379             return ErrorResponse.create("Near-RT RIC not found", HttpStatus.NOT_FOUND);
 380         }
 381
 382         String filteredPolicies = policiesToJson(filter(type, ric, service));
 383         return new ResponseEntity<>(filteredPolicies, HttpStatus.OK);
 384     }
 385
 386     @GetMapping(path = Consts.V2_API_ROOT + "/policy-ids", produces = MediaType.APPLICATION_JSON_VALUE)
 387     @ApiOperation(value = "Query policies, only policy identities are returned", notes = GET_POLICIES_QUERY_DETAILS)
 388     @ApiResponses(
 389         value = { //
 390             @ApiResponse(code = 200, message = "Policy identities", response = PolicyIdList.class),
 391             @ApiResponse(
 392                 code = 404,
 393                 message = "Near-RT RIC or type not found",
 394                 response = ErrorResponse.ErrorInfo.class)})
 395     public ResponseEntity<Object> getPolicyIds( //
 396         @ApiParam(
 397             name = Consts.POLICY_TYPE_ID_PARAM,
 398             required = false,
 399             value = "The identity of the policy type to get policies for.") //
 400         @RequestParam(name = Consts.POLICY_TYPE_ID_PARAM, required = false) String policyTypeId, //
 401         @ApiParam(
 402             name = Consts.RIC_ID_PARAM,
 403             required = false,
 404             value = "The identity of the Near-RT RIC to get policies for.") //
 405         @RequestParam(name = Consts.RIC_ID_PARAM, required = false) String ricId, //
 406         @ApiParam(
 407             name = Consts.SERVICE_ID_PARAM,
 408             required = false,
 409             value = "The identity of the service to get policies for.") //
 410         @RequestParam(name = Consts.SERVICE_ID_PARAM, required = false) String serviceId) //
 411     {
 412         if ((policyTypeId != null && this.policyTypes.get(policyTypeId) == null)) {
 413             return ErrorResponse.create("Policy type not found", HttpStatus.NOT_FOUND);
 414         }
 415         if ((ricId != null && this.rics.get(ricId) == null)) {
 416             return ErrorResponse.create("Near-RT RIC not found", HttpStatus.NOT_FOUND);
 417         }
 418
 419         String policyIdsJson = toPolicyIdsJson(filter(policyTypeId, ricId, serviceId));
 420         return new ResponseEntity<>(policyIdsJson, HttpStatus.OK);
 421     }
 422
 423     @GetMapping(path = Consts.V2_API_ROOT + "/policy-status", produces = MediaType.APPLICATION_JSON_VALUE)
 424     @ApiOperation(value = "Returns a policy status") //
 425     @ApiResponses(
 426         value = { //
 427             @ApiResponse(code = 200, message = "Policy status", response = JsonObject.class), //
 428             @ApiResponse(code = 404, message = "Policy is not found", response = ErrorResponse.ErrorInfo.class)} //
 429     )
 430     public Mono<ResponseEntity<Object>> getPolicyStatus( //
 431         @ApiParam(name = Consts.POLICY_ID_PARAM, required = true, value = "The identity of the policy.") //
 432         @RequestParam(name = Consts.POLICY_ID_PARAM, required = true) String policyId) {
 433         try {
 434             Policy policy = policies.getPolicy(policyId);
 435
 436             return a1ClientFactory.createA1Client(policy.ric()) //
 437                 .flatMap(client -> client.getPolicyStatus(policy)) //
 438                 .flatMap(status -> Mono.just(new ResponseEntity<>((Object) status, HttpStatus.OK)))
 439                 .onErrorResume(this::handleException);
 440         } catch (ServiceException e) {
 441             return ErrorResponse.createMono(e, HttpStatus.NOT_FOUND);
 442         }
 443     }
 444
 445     private void keepServiceAlive(String name) {
 446         Service s = this.services.get(name);
 447         if (s != null) {
 448             s.keepAlive();
 449         }
 450     }
 451
 452     private boolean include(String filter, String value) {
 453         return filter == null || value.equals(filter);
 454     }
 455
 456     private Collection<Policy> filter(Collection<Policy> collection, String type, String ric, String service) {
 457         if (type == null && ric == null && service == null) {
 458             return collection;
 459         }
 460         List<Policy> filtered = new ArrayList<>();
 461         for (Policy p : collection) {
 462             if (include(type, p.type().id()) && include(ric, p.ric().id()) && include(service, p.ownerServiceId())) {
 463                 filtered.add(p);
 464             }
 465         }
 466         return filtered;
 467     }
 468
 469     private Collection<Policy> filter(String type, String ric, String service) {
 470         if (type != null) {
 471             return filter(policies.getForType(type), null, ric, service);
 472         } else if (service != null) {
 473             return filter(policies.getForService(service), type, ric, null);
 474         } else if (ric != null) {
 475             return filter(policies.getForRic(ric), type, null, service);
 476         } else {
 477             return policies.getAll();
 478         }
 479     }
 480
 481     private String policiesToJson(Collection<Policy> policies) {
 482         List<PolicyInfo> v = new ArrayList<>(policies.size());
 483         for (Policy p : policies) {
 484             PolicyInfo policyInfo = new PolicyInfo();
 485             policyInfo.policyId = p.id();
 486             policyInfo.policyData = fromJson(p.json());
 487             policyInfo.ricId = p.ric().id();
 488             policyInfo.policyTypeId = p.type().id();
 489             policyInfo.serviceId = p.ownerServiceId();
 490             policyInfo.lastModified = p.lastModified().toString();
 491             if (!policyInfo.validate()) {
 492                 logger.error("BUG, all fields must be set");
 493             }
 494             v.add(policyInfo);
 495         }
 496         PolicyInfoList list = new PolicyInfoList(v);
 497         return gson.toJson(list);
 498     }
 499
 500     private Object fromJson(String jsonStr) {
 501         return gson.fromJson(jsonStr, Object.class);
 502     }
 503
 504     private String toPolicyTypeSchemasJson(Collection<PolicyType> types) {
 505
 506         Collection<String> schemas = new ArrayList<>();
 507         for (PolicyType t : types) {
 508             schemas.add(t.schema());
 509         }
 510         PolicySchemaList res = new PolicySchemaList(schemas);
 511         return gson.toJson(res);
 512     }
 513
 514     private String toPolicyTypeIdsJson(Collection<PolicyType> types) {
 515         List<String> v = new ArrayList<>(types.size());
 516         for (PolicyType t : types) {
 517             v.add(t.id());
 518         }
 519         PolicyTypeIdList ids = new PolicyTypeIdList(v);
 520         return gson.toJson(ids);
 521     }
 522
 523     private String toPolicyIdsJson(Collection<Policy> policies) {
 524         List<String> v = new ArrayList<>(policies.size());
 525         for (Policy p : policies) {
 526             v.add(p.id());
 527         }
 528         return gson.toJson(new PolicyIdList(v));
 529     }
 530
 531 }