ECOMP-ControlloopPolicy/src/main/java/org/openecomp/policy/controlloop/compiler/ControlLoopCompiler.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ECOMP Policy Engine
   4  * ================================================================================
   5  * Copyright (C) 2017 AT&T Intellectual Property. 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.openecomp.policy.controlloop.compiler;
  22
  23 import java.io.InputStream;
  24 import java.io.Serializable;
  25 import java.util.Collections;
  26 import java.util.HashMap;
  27 import java.util.List;
  28 import java.util.Map;
  29 import java.util.Map.Entry;
  30
  31 import org.jgrapht.DirectedGraph;
  32 import org.jgrapht.graph.ClassBasedEdgeFactory;
  33 import org.jgrapht.graph.DefaultEdge;
  34 import org.jgrapht.graph.DirectedMultigraph;
  35 import org.openecomp.policy.common.logging.flexlogger.FlexLogger;
  36 import org.openecomp.policy.common.logging.flexlogger.Logger;
  37 import org.openecomp.policy.controlloop.policy.ControlLoop;
  38 import org.openecomp.policy.controlloop.policy.ControlLoopPolicy;
  39 import org.openecomp.policy.controlloop.policy.FinalResult;
  40 import org.openecomp.policy.controlloop.policy.Policy;
  41 import org.openecomp.policy.controlloop.policy.PolicyResult;
  42 import org.openecomp.policy.controlloop.policy.TargetType;
  43 import org.yaml.snakeyaml.Yaml;
  44 import org.yaml.snakeyaml.constructor.Constructor;
  45
  46 import com.google.common.collect.ImmutableList;
  47 import com.google.common.collect.ImmutableMap;
  48
  49 public class ControlLoopCompiler {
  50         private static Logger LOGGER = FlexLogger.getLogger(ControlLoopCompiler.class.getName());
  51
  52         public static ControlLoopPolicy compile(ControlLoopPolicy policy, ControlLoopCompilerCallback callback) throws CompilerException {
  53                 //
  54                 // Ensure the control loop is sane
  55                 //
  56                 validateControlLoop(policy.getControlLoop(), callback);
  57                 //
  58                 // Validate the policies
  59                 //
  60                 validatePolicies(policy, callback);
  61
  62                 return policy;
  63         }
  64
  65         public static ControlLoopPolicy compile(InputStream yamlSpecification, ControlLoopCompilerCallback callback) throws CompilerException {
  66                 Yaml yaml = new Yaml(new Constructor(ControlLoopPolicy.class));
  67                 Object obj = yaml.load(yamlSpecification);
  68                 if (obj == null) {
  69                         throw new CompilerException("Could not parse yaml specification.");
  70                 }
  71                 if (! (obj instanceof ControlLoopPolicy)) {
  72                         throw new CompilerException("Yaml could not parse specification into required ControlLoopPolicy object");
  73                 }
  74                 return ControlLoopCompiler.compile((ControlLoopPolicy) obj, callback);
  75         }
  76
  77         private static void validateControlLoop(ControlLoop controlLoop, ControlLoopCompilerCallback callback) throws CompilerException {
  78                 if (controlLoop == null && callback != null) {
  79                         callback.onError("controlLoop cannot be null");
  80                 }
  81                 if ((controlLoop.getControlLoopName() == null || controlLoop.getControlLoopName().length() < 1) && callback != null) {
  82                         callback.onError("Missing controlLoopName");
  83                 }
  84                 if ((!controlLoop.getVersion().contentEquals(ControlLoop.getVERSION())) && callback != null) {
  85                         callback.onError("Unsupported version for this compiler");
  86                 }
  87                 if (controlLoop.getTrigger_policy() == null || controlLoop.getTrigger_policy().length() < 1) {
  88                         throw new CompilerException("trigger_policy is not valid");
  89                 }
  90         }
  91
  92         private static void validatePolicies(ControlLoopPolicy policy, ControlLoopCompilerCallback callback) throws CompilerException {
  93                 if (policy == null) {
  94                         throw new CompilerException("policy cannot be null");
  95                 }
  96                 //
  97                 // verify controlLoop overall timeout should be no less than the sum of operational policy timeouts
  98                 //
  99                 if (policy.getPolicies() == null) {
 100             callback.onWarning("controlLoop is an open loop.");
 101         }
 102         else{
 103             int sum = 0;
 104                     for (Policy operPolicy : policy.getPolicies()) {
 105                         sum += operPolicy.getTimeout().intValue();
 106                     }
 107                     if (policy.getControlLoop().getTimeout().intValue() < sum && callback != null) {
 108                         callback.onError("controlLoop overall timeout is less than the sum of operational policy timeouts.");
 109                     }
 110                     //
 111                     // For this version we can use a directed multigraph, in the future we may not be able to
 112                     //
 113                     DirectedGraph<NodeWrapper, LabeledEdge> graph = new DirectedMultigraph<>(new ClassBasedEdgeFactory<NodeWrapper, LabeledEdge>(LabeledEdge.class));
 114                     //
 115                     // Check to see if the trigger Event is for OpenLoop, we do so by
 116                     // attempting to create a FinalResult object from it. If its a policy id, this should
 117                     // return null.
 118                     //
 119                     FinalResult triggerResult = FinalResult.toResult(policy.getControlLoop().getTrigger_policy());
 120                     TriggerNodeWrapper triggerNode;
 121                     //
 122                     // Did this turn into a FinalResult object?
 123                     //
 124                     if (triggerResult != null) {
 125                         //
 126                         // Ensure they didn't use some other FinalResult code
 127                         //
 128                         if (triggerResult != FinalResult.FINAL_OPENLOOP) {
 129                                 throw new CompilerException("Unexpected Final Result for trigger_policy, should only be " + FinalResult.FINAL_OPENLOOP.toString() + " or a valid Policy ID");
 130                         }
 131                         //
 132                         // They really shouldn't have any policies attached.
 133                         //
 134                         if ((policy.getPolicies() != null || policy.getPolicies().isEmpty())&& callback != null ) {
 135                                 callback.onWarning("Open Loop policy contains policies. The policies will never be invoked.");
 136                         }
 137                         return;
 138                         //
 139                     } else {
 140                         //
 141                         // Ok, not a FinalResult object so let's assume that it is a Policy. Which it should be.
 142                         //
 143                         triggerNode = new TriggerNodeWrapper(policy.getControlLoop().getControlLoopName());
 144                     }
 145                     //
 146                     // Add in the trigger node
 147                     //
 148                     graph.addVertex(triggerNode);
 149                     //
 150                     // Add in our Final Result nodes. All paths should end to these nodes.
 151                     //
 152                     FinalResultNodeWrapper finalSuccess = new FinalResultNodeWrapper(FinalResult.FINAL_SUCCESS);
 153                     FinalResultNodeWrapper finalFailure = new FinalResultNodeWrapper(FinalResult.FINAL_FAILURE);
 154                     FinalResultNodeWrapper finalFailureTimeout = new FinalResultNodeWrapper(FinalResult.FINAL_FAILURE_TIMEOUT);
 155                     FinalResultNodeWrapper finalFailureRetries = new FinalResultNodeWrapper(FinalResult.FINAL_FAILURE_RETRIES);
 156                     FinalResultNodeWrapper finalFailureException = new FinalResultNodeWrapper(FinalResult.FINAL_FAILURE_EXCEPTION);
 157                     FinalResultNodeWrapper finalFailureGuard = new FinalResultNodeWrapper(FinalResult.FINAL_FAILURE_GUARD);
 158                     graph.addVertex(finalSuccess);
 159                     graph.addVertex(finalFailure);
 160                     graph.addVertex(finalFailureTimeout);
 161                     graph.addVertex(finalFailureRetries);
 162                     graph.addVertex(finalFailureException);
 163                     graph.addVertex(finalFailureGuard);
 164                     //
 165                     // Work through the policies and add them in as nodes.
 166                     //
 167                     Map<Policy, PolicyNodeWrapper> mapNodes = new HashMap<>();
 168                     for (Policy operPolicy : policy.getPolicies()) {
 169                         //
 170                         // Is it still ok to add?
 171                         //
 172                         if (!okToAdd(operPolicy, callback)) {
 173                                 //
 174                                 // Do not add it in
 175                                 //
 176                                 continue;
 177                         }
 178                         //
 179                         // Create wrapper policy node and save it into our map so we can
 180                         // easily retrieve it.
 181                         //
 182                         PolicyNodeWrapper node = new PolicyNodeWrapper(operPolicy);
 183                         mapNodes.put(operPolicy, node);
 184                         graph.addVertex(node);
 185                         //
 186                         // Is this the trigger policy?
 187                         //
 188                         if (operPolicy.getId().equals(policy.getControlLoop().getTrigger_policy())) {
 189                                 //
 190                                 // Yes add an edge from our trigger event node to this policy
 191                                 //
 192                                 graph.addEdge(triggerNode, node, new LabeledEdge(triggerNode, node, new TriggerEdgeWrapper("ONSET")));
 193                         }
 194                     }
 195                     //
 196                     // last sweep to connect remaining edges for policy results
 197                     //
 198                     for (Policy operPolicy : policy.getPolicies()) {
 199                         PolicyNodeWrapper node = mapNodes.get(operPolicy);
 200                         //
 201                         // Just ensure this has something
 202                         //
 203                         if (node == null) {
 204                                 continue;
 205                         }
 206                         if (FinalResult.isResult(operPolicy.getSuccess(), FinalResult.FINAL_SUCCESS)) {
 207                                 graph.addEdge(node, finalSuccess, new LabeledEdge(node, finalSuccess, new FinalResultEdgeWrapper(FinalResult.FINAL_SUCCESS)));
 208                         } else {
 209                                 PolicyNodeWrapper toNode = findPolicyNode(mapNodes, operPolicy.getSuccess());
 210                                 if (toNode == null) {
 211                                         throw new CompilerException("Operation Policy " + operPolicy.getId() + " success is connected to unknown policy " + operPolicy.getSuccess());
 212                                 } else {
 213                                  graph.addEdge(node, toNode, new LabeledEdge(node, toNode, new PolicyResultEdgeWrapper(PolicyResult.SUCCESS)));
 214                                 }
 215                         }
 216                         if (FinalResult.isResult(operPolicy.getFailure(), FinalResult.FINAL_FAILURE)) {
 217                                 graph.addEdge(node, finalFailure, new LabeledEdge(node, finalFailure, new FinalResultEdgeWrapper(FinalResult.FINAL_FAILURE)));
 218                         } else {
 219                                 PolicyNodeWrapper toNode = findPolicyNode(mapNodes, operPolicy.getFailure());
 220                                 if (toNode == null) {
 221                                         throw new CompilerException("Operation Policy " + operPolicy.getId() + " failure is connected to unknown policy " + operPolicy.getFailure());
 222                                 } else {
 223                                         graph.addEdge(node, toNode, new LabeledEdge(node, toNode, new PolicyResultEdgeWrapper(PolicyResult.FAILURE)));
 224                                 }
 225                         }
 226                         if (FinalResult.isResult(operPolicy.getFailure_timeout(), FinalResult.FINAL_FAILURE_TIMEOUT)) {
 227                                 graph.addEdge(node, finalFailureTimeout, new LabeledEdge(node, finalFailureTimeout, new FinalResultEdgeWrapper(FinalResult.FINAL_FAILURE_TIMEOUT)));
 228                         } else {
 229                                 PolicyNodeWrapper toNode = findPolicyNode(mapNodes, operPolicy.getFailure_timeout());
 230                                 if (toNode == null) {
 231                                         throw new CompilerException("Operation Policy " + operPolicy.getId() + " failure_timeout is connected to unknown policy " + operPolicy.getFailure_timeout());
 232                                 } else {
 233                                         graph.addEdge(node, toNode, new LabeledEdge(node, toNode, new PolicyResultEdgeWrapper(PolicyResult.FAILURE_TIMEOUT)));
 234                                 }
 235                         }
 236                         if (FinalResult.isResult(operPolicy.getFailure_retries(), FinalResult.FINAL_FAILURE_RETRIES)) {
 237                                 graph.addEdge(node, finalFailureRetries, new LabeledEdge(node, finalFailureRetries, new FinalResultEdgeWrapper(FinalResult.FINAL_FAILURE_RETRIES)));
 238                         } else {
 239                                 PolicyNodeWrapper toNode = findPolicyNode(mapNodes, operPolicy.getFailure_retries());
 240                                 if (toNode == null) {
 241                                         throw new CompilerException("Operation Policy " + operPolicy.getId() + " failure_retries is connected to unknown policy " + operPolicy.getFailure_retries());
 242                                 } else {
 243                                         graph.addEdge(node, toNode, new LabeledEdge(node, toNode, new PolicyResultEdgeWrapper(PolicyResult.FAILURE_RETRIES)));
 244                                 }
 245                         }
 246                         if (FinalResult.isResult(operPolicy.getFailure_exception(), FinalResult.FINAL_FAILURE_EXCEPTION)) {
 247                                 graph.addEdge(node, finalFailureException, new LabeledEdge(node, finalFailureException, new FinalResultEdgeWrapper(FinalResult.FINAL_FAILURE_EXCEPTION)));
 248                         } else {
 249                                 PolicyNodeWrapper toNode = findPolicyNode(mapNodes, operPolicy.getFailure_exception());
 250                                 if (toNode == null) {
 251                                         throw new CompilerException("Operation Policy " + operPolicy.getId() + " failure_exception is connected to unknown policy " + operPolicy.getFailure_exception());
 252                                 } else {
 253                                         graph.addEdge(node, toNode, new LabeledEdge(node, toNode, new PolicyResultEdgeWrapper(PolicyResult.FAILURE_EXCEPTION)));
 254                                 }
 255                         }
 256                         if (FinalResult.isResult(operPolicy.getFailure_guard(), FinalResult.FINAL_FAILURE_GUARD)) {
 257                                 graph.addEdge(node, finalFailureGuard, new LabeledEdge(node, finalFailureGuard, new FinalResultEdgeWrapper(FinalResult.FINAL_FAILURE_GUARD)));
 258                         } else {
 259                                 PolicyNodeWrapper toNode = findPolicyNode(mapNodes, operPolicy.getFailure_guard());
 260                                 if (toNode == null) {
 261                                         throw new CompilerException("Operation Policy " + operPolicy.getId() + " failure_guard is connected to unknown policy " + operPolicy.getFailure_guard());
 262                                 } else {
 263                                         graph.addEdge(node, toNode, new LabeledEdge(node, toNode, new PolicyResultEdgeWrapper(PolicyResult.FAILURE_GUARD)));
 264                                 }
 265                         }
 266                 }
 267                     //
 268                     // Now validate all the nodes/edges
 269                     //
 270                     for (NodeWrapper node : graph.vertexSet()) {
 271                         if (node instanceof TriggerNodeWrapper) {
 272                                 LOGGER.info("Trigger Node " + node.toString());
 273                                 if (graph.inDegreeOf(node) > 0 ) {
 274                                         //
 275                                         // Really should NEVER get here unless someone messed up the code above.
 276                                         //
 277                                         throw new CompilerException("No inputs to event trigger");
 278                                 }
 279                                 //
 280                                 // Should always be 1, except in the future we may support multiple events
 281                                 //
 282                                 if (graph.outDegreeOf(node) > 1) {
 283                                         throw new CompilerException("The event trigger should only go to ONE node");
 284                                 }
 285                         } else if (node instanceof FinalResultNodeWrapper) {
 286                                 LOGGER.info("FinalResult Node " + node.toString());
 287                                 //
 288                                 // FinalResult nodes should NEVER have an out edge
 289                                 //
 290                                 if (graph.outDegreeOf(node) > 0) {
 291                                         throw new CompilerException("FinalResult nodes should never have any out edges.");
 292                                 }
 293                         } else if (node instanceof PolicyNodeWrapper) {
 294                                 LOGGER.info("Policy Node " + node.toString());
 295                                 //
 296                                 // All Policy Nodes should have the 5 out degrees defined.
 297                                 //
 298                                 if (graph.outDegreeOf(node) != 6) {
 299                                         throw new CompilerException("Policy node should ALWAYS have 6 out degrees.");
 300                                 }
 301                                 //
 302                                 // All Policy Nodes should have at least 1 in degrees
 303                                 //
 304                                 if (graph.inDegreeOf(node) == 0 && callback != null) {
 305                                         callback.onWarning("Policy " + node.getID() + " is not reachable.");
 306                                 }
 307                         }
 308                         for (LabeledEdge edge : graph.outgoingEdgesOf(node)){
 309                                 LOGGER.info(edge.from.getID() + " invokes " + edge.to.getID() + " upon " + edge.edge.getID());
 310                         }
 311                     }
 312             }
 313         }
 314
 315         private static boolean okToAdd(Policy operPolicy, ControlLoopCompilerCallback callback) {
 316                 //
 317         // Check the policy id and make sure its sane
 318         //
 319         boolean okToAdd = true;
 320         if (operPolicy.getId() == null || operPolicy.getId().length() < 1) {
 321                 if (callback != null) {
 322                         callback.onError("Operational Policy has an bad ID");
 323                 }
 324                 okToAdd = false;
 325         }
 326         //
 327         // Check if they decided to make the ID a result object
 328         //
 329         if (PolicyResult.toResult(operPolicy.getId()) != null) {
 330                 if (callback != null) {
 331                         callback.onError("Policy id is set to a PolicyResult " + operPolicy.getId());
 332                 }
 333                 okToAdd = false;
 334         }
 335         if (FinalResult.toResult(operPolicy.getId()) != null) {
 336                 if (callback != null) {
 337                         callback.onError("Policy id is set to a FinalResult " + operPolicy.getId());
 338                 }
 339                 okToAdd = false;
 340         }
 341         //
 342         // Check that the actor/recipe/target are valid
 343         //
 344         if (operPolicy.getActor() == null) {
 345                 if (callback != null) {
 346                         callback.onError("Policy actor is null");
 347                 }
 348                 okToAdd = false;
 349         }
 350         //
 351         // Construct a list for all valid actors
 352         //
 353         ImmutableList<String> actors = ImmutableList.of("APPC", "AOTS", "MSO", "SDNO", "SDNR", "AAI");
 354         //
 355         if (operPolicy.getActor() != null && (!actors.contains(operPolicy.getActor())) ) {
 356                 if (callback != null) {
 357                         callback.onError("Policy actor is invalid");
 358                 }
 359                 okToAdd = false;
 360         }
 361         if (operPolicy.getRecipe() == null) {
 362                 if (callback != null) {
 363                         callback.onError("Policy recipe is null");
 364                 }
 365                 okToAdd = false;
 366         }
 367         //
 368         // NOTE: We need a way to find the acceptable recipe values (either Enum or a database that has these)
 369         //
 370         ImmutableMap<String, List<String>> recipes = new ImmutableMap.Builder<String, List<String>>()
 371                                 .put("APPC", ImmutableList.of("Restart", "Rebuild", "Migrate", "ModifyConfig"))
 372                         .put("AOTS", ImmutableList.of("checkMaintenanceWindow", "checkENodeBTicketHours", "checkEquipmentStatus", "checkEimStatus", "checkEquipmentMaintenance"))
 373                         .put("MSO", ImmutableList.of("VF Module Create"))
 374                         .put("SDNO", ImmutableList.of("health-diagnostic-type", "health-diagnostic", "health-diagnostic-history", "health-diagnostic-commands", "health-diagnostic-aes"))
 375                         .put("SDNR", ImmutableList.of("Restart", "Reboot"))
 376                         .build();
 377         //
 378         if (operPolicy.getRecipe() != null && (!recipes.getOrDefault(operPolicy.getActor(), Collections.emptyList()).contains(operPolicy.getRecipe()))) {
 379                 if (callback != null) {
 380                         callback.onError("Policy recipe is invalid");
 381                 }
 382                 okToAdd = false;
 383         }
 384         if (operPolicy.getTarget() == null) {
 385                 if (callback != null) {
 386                         callback.onError("Policy target is null");
 387                 }
 388                 okToAdd = false;
 389         }
 390         if (operPolicy.getTarget() != null && operPolicy.getTarget().getType() != TargetType.VM && operPolicy.getTarget().getType() != TargetType.VFC && operPolicy.getTarget().getType() != TargetType.PNF) {
 391                 if (callback != null) {
 392                         callback.onError("Policy target is invalid");
 393                 }
 394                 okToAdd = false;
 395         }
 396         //
 397         // Check that policy results are connected to either default final * or another policy
 398         //
 399         if (FinalResult.toResult(operPolicy.getSuccess()) != null && operPolicy.getSuccess() != FinalResult.FINAL_SUCCESS.toString()) {
 400                 if (callback != null) {
 401                         callback.onError("Policy success is neither another policy nor FINAL_SUCCESS");
 402                 }
 403                 okToAdd = false;
 404         }
 405         if (FinalResult.toResult(operPolicy.getFailure()) != null && operPolicy.getFailure() != FinalResult.FINAL_FAILURE.toString()) {
 406                 if (callback != null) {
 407                         callback.onError("Policy failure is neither another policy nor FINAL_FAILURE");
 408                 }
 409                 okToAdd = false;
 410         }
 411         if (FinalResult.toResult(operPolicy.getFailure_retries()) != null && operPolicy.getFailure_retries() != FinalResult.FINAL_FAILURE_RETRIES.toString()) {
 412                 if (callback != null) {
 413                         callback.onError("Policy failure retries is neither another policy nor FINAL_FAILURE_RETRIES");
 414                 }
 415                 okToAdd = false;
 416         }
 417         if (FinalResult.toResult(operPolicy.getFailure_timeout()) != null && operPolicy.getFailure_timeout() != FinalResult.FINAL_FAILURE_TIMEOUT.toString()) {
 418                 if (callback != null) {
 419                         callback.onError("Policy failure timeout is neither another policy nor FINAL_FAILURE_TIMEOUT");
 420                 }
 421                 okToAdd = false;
 422         }
 423         if (FinalResult.toResult(operPolicy.getFailure_exception()) != null && operPolicy.getFailure_exception() != FinalResult.FINAL_FAILURE_EXCEPTION.toString()) {
 424                 if (callback != null) {
 425                         callback.onError("Policy failure exception is neither another policy nor FINAL_FAILURE_EXCEPTION");
 426                 }
 427                 okToAdd = false;
 428         }
 429         if (FinalResult.toResult(operPolicy.getFailure_guard()) != null && operPolicy.getFailure_guard() != FinalResult.FINAL_FAILURE_GUARD.toString()) {
 430                 if (callback != null) {
 431                         callback.onError("Policy failure guard is neither another policy nor FINAL_FAILURE_GUARD");
 432                 }
 433                 okToAdd = false;
 434         }
 435         return okToAdd;
 436         }
 437
 438         private static PolicyNodeWrapper findPolicyNode(Map<Policy, PolicyNodeWrapper> mapNodes, String id) {
 439                 for (Entry<Policy, PolicyNodeWrapper> entry : mapNodes.entrySet()) {
 440                         if (entry.getKey().getId().equals(id)) {
 441                                 return entry.getValue();
 442                         }
 443                 }
 444                 return null;
 445         }
 446
 447         @FunctionalInterface
 448         private interface NodeWrapper extends Serializable{
 449                 public String   getID();
 450         }
 451
 452         private static class TriggerNodeWrapper implements NodeWrapper {
 453                 private static final long serialVersionUID = -187644087811478349L;
 454                 private String closedLoopControlName;
 455
 456                 public TriggerNodeWrapper(String closedLoopControlName) {
 457                         this.closedLoopControlName = closedLoopControlName;
 458                 }
 459
 460                 @Override
 461                 public String toString() {
 462                         return "TriggerNodeWrapper [closedLoopControlName=" + closedLoopControlName + "]";
 463                 }
 464
 465                 @Override
 466                 public String getID() {
 467                         return closedLoopControlName;
 468                 }
 469
 470         }
 471
 472         private static class FinalResultNodeWrapper implements NodeWrapper {
 473                 private static final long serialVersionUID = 8540008796302474613L;
 474                 private FinalResult result;
 475
 476                 public FinalResultNodeWrapper(FinalResult result) {
 477                         this.result = result;
 478                 }
 479
 480                 @Override
 481                 public String toString() {
 482                         return "FinalResultNodeWrapper [result=" + result + "]";
 483                 }
 484
 485                 @Override
 486                 public String getID() {
 487                         return result.toString();
 488                 }
 489         }
 490
 491         private static class PolicyNodeWrapper implements NodeWrapper {
 492                 private static final long serialVersionUID = 8170162175653823082L;
 493                 private Policy policy;
 494
 495                 public PolicyNodeWrapper(Policy operPolicy) {
 496                         this.policy = operPolicy;
 497                 }
 498
 499                 @Override
 500                 public String toString() {
 501                         return "PolicyNodeWrapper [policy=" + policy + "]";
 502                 }
 503
 504                 @Override
 505                 public String getID() {
 506                         return policy.getId();
 507                 }
 508         }
 509
 510         @FunctionalInterface
 511         private interface EdgeWrapper extends Serializable{
 512                 public String getID();
 513
 514         }
 515
 516         private static class TriggerEdgeWrapper implements EdgeWrapper {
 517                 private static final long serialVersionUID = 2678151552623278863L;
 518                 private String trigger;
 519
 520                 public TriggerEdgeWrapper(String trigger) {
 521                         this.trigger = trigger;
 522                 }
 523
 524                 @Override
 525                 public String getID() {
 526                         return trigger;
 527                 }
 528
 529                 @Override
 530                 public String toString() {
 531                         return "TriggerEdgeWrapper [trigger=" + trigger + "]";
 532                 }
 533
 534         }
 535
 536         private static class PolicyResultEdgeWrapper implements EdgeWrapper {
 537                 private static final long serialVersionUID = 6078569477021558310L;
 538                 private PolicyResult policyResult;
 539
 540                 public PolicyResultEdgeWrapper(PolicyResult policyResult) {
 541                         super();
 542                         this.policyResult = policyResult;
 543                 }
 544
 545                 @Override
 546                 public String toString() {
 547                         return "PolicyResultEdgeWrapper [policyResult=" + policyResult + "]";
 548                 }
 549
 550                 @Override
 551                 public String getID() {
 552                         return policyResult.toString();
 553                 }
 554
 555
 556         }
 557
 558         private static class FinalResultEdgeWrapper implements EdgeWrapper {
 559                 private static final long serialVersionUID = -1486381946896779840L;
 560                 private FinalResult finalResult;
 561                 public FinalResultEdgeWrapper(FinalResult result) {
 562                         this.finalResult = result;
 563                 }
 564
 565                 @Override
 566                 public String toString() {
 567                         return "FinalResultEdgeWrapper [finalResult=" + finalResult + "]";
 568                 }
 569
 570                 @Override
 571                 public String getID() {
 572                         return finalResult.toString();
 573                 }
 574         }
 575
 576
 577         private static class LabeledEdge extends DefaultEdge {
 578                 private static final long serialVersionUID = 579384429573385524L;
 579
 580                 private NodeWrapper from;
 581                 private NodeWrapper to;
 582                 private EdgeWrapper edge;
 583
 584                 public LabeledEdge(NodeWrapper from, NodeWrapper to, EdgeWrapper edge) {
 585                         this.from = from;
 586                         this.to = to;
 587                         this.edge = edge;
 588                 }
 589
 590                 @SuppressWarnings("unused")
 591                 public NodeWrapper from() {
 592                         return from;
 593                 }
 594
 595                 @SuppressWarnings("unused")
 596                 public NodeWrapper to() {
 597                         return to;
 598                 }
 599
 600                 @SuppressWarnings("unused")
 601                 public EdgeWrapper edge() {
 602                         return edge;
 603                 }
 604
 605                 @Override
 606                 public String toString() {
 607                         return "LabeledEdge [from=" + from + ", to=" + to + ", edge=" + edge + "]";
 608                 }
 609         }
 610
 611 }