ONAP-PAP-REST/src/main/java/org/onap/policy/pap/xacml/rest/components/ActionPolicy.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ONAP-PAP-REST
   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.onap.policy.pap.xacml.rest.components;
  22
  23 import java.io.BufferedWriter;
  24 import java.io.File;
  25 import java.io.FileWriter;
  26 import java.io.IOException;
  27 import java.nio.file.Path;
  28 import java.nio.file.Paths;
  29 import java.util.HashMap;
  30 import java.util.LinkedList;
  31 import java.util.List;
  32 import java.util.Map;
  33
  34 import oasis.names.tc.xacml._3_0.core.schema.wd_17.AllOfType;
  35 import oasis.names.tc.xacml._3_0.core.schema.wd_17.AnyOfType;
  36 import oasis.names.tc.xacml._3_0.core.schema.wd_17.ApplyType;
  37 import oasis.names.tc.xacml._3_0.core.schema.wd_17.AttributeAssignmentExpressionType;
  38 import oasis.names.tc.xacml._3_0.core.schema.wd_17.AttributeDesignatorType;
  39 import oasis.names.tc.xacml._3_0.core.schema.wd_17.AttributeValueType;
  40 import oasis.names.tc.xacml._3_0.core.schema.wd_17.ConditionType;
  41 import oasis.names.tc.xacml._3_0.core.schema.wd_17.EffectType;
  42 import oasis.names.tc.xacml._3_0.core.schema.wd_17.MatchType;
  43 import oasis.names.tc.xacml._3_0.core.schema.wd_17.ObjectFactory;
  44 import oasis.names.tc.xacml._3_0.core.schema.wd_17.ObligationExpressionType;
  45 import oasis.names.tc.xacml._3_0.core.schema.wd_17.ObligationExpressionsType;
  46 import oasis.names.tc.xacml._3_0.core.schema.wd_17.PolicyType;
  47 import oasis.names.tc.xacml._3_0.core.schema.wd_17.RuleType;
  48 import oasis.names.tc.xacml._3_0.core.schema.wd_17.TargetType;
  49
  50 import org.onap.policy.pap.xacml.rest.XACMLPapServlet;
  51 import org.onap.policy.pap.xacml.rest.util.JPAUtils;
  52 import org.onap.policy.rest.adapter.PolicyRestAdapter;
  53 import org.onap.policy.rest.jpa.Datatype;
  54 import org.onap.policy.rest.jpa.FunctionDefinition;
  55 import org.onap.policy.xacml.api.XACMLErrorConstants;
  56
  57 import com.att.research.xacml.api.pap.PAPException;
  58
  59 import org.onap.policy.common.logging.eelf.MessageCodes;
  60 import org.onap.policy.common.logging.eelf.PolicyLogger;
  61 import org.onap.policy.common.logging.flexlogger.FlexLogger;
  62 import org.onap.policy.common.logging.flexlogger.Logger;
  63
  64 public class ActionPolicy extends Policy {
  65
  66     /**
  67      * ActionPolicy Fields
  68      */
  69     private static final Logger LOGGER = FlexLogger.getLogger(ActionPolicy.class);
  70
  71     public static final String JSON_CONFIG = "JSON";
  72
  73     public static final String PDP_ACTION = "PDP";
  74     public static final String PEP_ACTION = "PEP";
  75     public static final String TYPE_ACTION = "REST";
  76
  77     public static final String GET_METHOD = "GET";
  78     public static final String PUT_METHOD = "PUT";
  79     public static final String POST_METHOD = "POST";
  80
  81     public static final String PERFORMER_ATTRIBUTEID = "performer";
  82     public static final String TYPE_ATTRIBUTEID = "type";
  83     public static final String METHOD_ATTRIBUTEID = "method";
  84     public static final String HEADERS_ATTRIBUTEID = "headers";
  85     public static final String URL_ATTRIBUTEID = "url";
  86     public static final String BODY_ATTRIBUTEID = "body";
  87
  88     List<String> dynamicLabelRuleAlgorithms = new LinkedList<>();
  89     List<String> dynamicFieldFunctionRuleAlgorithms = new LinkedList<>();
  90     List<String> dynamicFieldOneRuleAlgorithms = new LinkedList<>();
  91     List<String> dynamicFieldTwoRuleAlgorithms = new LinkedList<>();
  92
  93     protected Map<String, String> dropDownMap = new HashMap<>();
  94
  95     private static boolean isAttribute = false;
  96     private synchronized static boolean getAttribute () {
  97         return isAttribute;
  98
  99     }
 100
 101     public ActionPolicy() {
 102         super();
 103     }
 104
 105     public ActionPolicy(PolicyRestAdapter policyAdapter){
 106         this.policyAdapter = policyAdapter;
 107     }
 108
 109     @Override
 110     public Map<String, String> savePolicies() throws PAPException {
 111
 112         Map<String, String> successMap = new HashMap<>();
 113         if(isPolicyExists()){
 114             successMap.put("EXISTS", "This Policy already exist on the PAP");
 115             return successMap;
 116         }
 117
 118         if(!ActionPolicy.getAttribute()) {
 119             successMap.put("invalidAttribute", "Action Attrbute was not in the database.");
 120             return successMap;
 121         }
 122
 123         if(!isPreparedToSave()){
 124             //Prep and configure the policy for saving
 125             prepareToSave();
 126         }
 127
 128         // Until here we prepared the data and here calling the method to create xml.
 129         Path newPolicyPath = null;
 130         newPolicyPath = Paths.get(policyAdapter.getNewFileName());
 131         successMap = createPolicy(newPolicyPath,getCorrectPolicyDataObject() );
 132         return successMap;
 133     }
 134
 135     //This is the method for preparing the policy for saving.  We have broken it out
 136     //separately because the fully configured policy is used for multiple things
 137     @Override
 138     public boolean prepareToSave() throws PAPException{
 139
 140         if(isPreparedToSave()){
 141             //we have already done this
 142             return true;
 143         }
 144
 145         int version = 0;
 146         String policyID = policyAdapter.getPolicyID();
 147         version = policyAdapter.getHighestVersion();
 148
 149         // Create the Instance for pojo, PolicyType object is used in marshalling.
 150         if (policyAdapter.getPolicyType().equals("Action")) {
 151             PolicyType policyConfig = new PolicyType();
 152
 153             policyConfig.setVersion(Integer.toString(version));
 154             policyConfig.setPolicyId(policyID);
 155             policyConfig.setTarget(new TargetType());
 156             policyAdapter.setData(policyConfig);
 157         }
 158
 159         policyName = policyAdapter.getNewFileName();
 160
 161         if (policyAdapter.getData() != null) {
 162             // Action body is optional so checking value provided or not
 163             String comboDictValue = policyAdapter.getActionAttribute();
 164             String actionBody = policyAdapter.getActionBody();
 165             setAttribute(false);
 166
 167             //if actionBody is null or empty then we know the ActionAttribute in the request does not exist in the dictionary
 168             if(!(actionBody==null || "".equals(actionBody))){
 169                 saveActionBody(policyName, actionBody);
 170                 setAttribute(true);
 171             } else {
 172                 if(!getAttribute()){
 173                     LOGGER.error(XACMLErrorConstants.ERROR_DATA_ISSUE + "Could not find " + comboDictValue + " in the ActionPolicyDict table.");
 174                     return false;
 175                 }
 176             }
 177
 178             PolicyType actionPolicy = (PolicyType) policyAdapter.getData();
 179             actionPolicy.setDescription(policyAdapter.getPolicyDescription());
 180             actionPolicy.setRuleCombiningAlgId(policyAdapter.getRuleCombiningAlgId());
 181
 182             AllOfType allOf = new AllOfType();
 183
 184             Map<String, String> dynamicFieldComponentAttributes = policyAdapter.getDynamicFieldConfigAttributes();
 185
 186             // If there is any dynamic field attributes create the matches here
 187             for (String keyField : dynamicFieldComponentAttributes.keySet()) {
 188                 String key = keyField;
 189                 String value = dynamicFieldComponentAttributes.get(key);
 190                 MatchType dynamicMatch = createDynamicMatch(key, value);
 191                 allOf.getMatch().add(dynamicMatch);
 192             }
 193
 194             AnyOfType anyOf = new AnyOfType();
 195             anyOf.getAllOf().add(allOf);
 196
 197             TargetType target = new TargetType();
 198             target.getAnyOf().add(anyOf);
 199
 200             // Adding the target to the policy element
 201             actionPolicy.setTarget(target);
 202
 203             RuleType rule = new RuleType();
 204             rule.setRuleId(policyAdapter.getRuleID());
 205
 206             rule.setEffect(EffectType.PERMIT);
 207             rule.setTarget(new TargetType());
 208
 209             dynamicLabelRuleAlgorithms = policyAdapter.getDynamicRuleAlgorithmLabels();
 210             dynamicFieldFunctionRuleAlgorithms = policyAdapter.getDynamicRuleAlgorithmCombo();
 211             dynamicFieldOneRuleAlgorithms = policyAdapter.getDynamicRuleAlgorithmField1();
 212             dynamicFieldTwoRuleAlgorithms = policyAdapter.getDynamicRuleAlgorithmField2();
 213             dropDownMap = createDropDownMap();
 214
 215             // Rule attributes are optional and dynamic so check and add them to condition.
 216             if (dynamicLabelRuleAlgorithms != null && dynamicLabelRuleAlgorithms.size() > 0) {
 217                 boolean isCompound = false;
 218                 ConditionType condition = new ConditionType();
 219                 int index = dynamicFieldOneRuleAlgorithms.size() - 1;
 220
 221                 for (String labelAttr : dynamicLabelRuleAlgorithms) {
 222                     // if the rule algorithm as a label means it is a compound
 223                     if (dynamicFieldOneRuleAlgorithms.get(index).toString().equals(labelAttr)) {
 224                         ApplyType actionApply = new ApplyType();
 225
 226                         String selectedFunction = (String) dynamicFieldFunctionRuleAlgorithms.get(index).toString();
 227                         String value1 = (String) dynamicFieldOneRuleAlgorithms.get(index).toString();
 228                         String value2 = dynamicFieldTwoRuleAlgorithms.get(index).toString();
 229                         actionApply.setFunctionId(dropDownMap.get(selectedFunction));
 230                         actionApply.getExpression().add(new ObjectFactory().createApply(getInnerActionApply(value1)));
 231                         actionApply.getExpression().add(new ObjectFactory().createApply(getInnerActionApply(value2)));
 232                         condition.setExpression(new ObjectFactory().createApply(actionApply));
 233                         isCompound = true;
 234                     }
 235                 }
 236                 // if rule algorithm not a compound
 237                 if (!isCompound) {
 238                     condition.setExpression(new ObjectFactory().createApply(getInnerActionApply(dynamicLabelRuleAlgorithms.get(index).toString())));
 239                 }
 240                 rule.setCondition(condition);
 241             }
 242             // set the obligations to rule
 243             rule.setObligationExpressions(getObligationExpressions());
 244             actionPolicy.getCombinerParametersOrRuleCombinerParametersOrVariableDefinition().add(rule);
 245             policyAdapter.setPolicyData(actionPolicy);
 246         }  else {
 247             PolicyLogger.error(MessageCodes.ERROR_DATA_ISSUE + "Unsupported data object." + policyAdapter.getData().getClass().getCanonicalName());
 248         }
 249
 250         setPreparedToSave(true);
 251         return true;
 252     }
 253
 254     private static synchronized void setAttribute(boolean b) {
 255         isAttribute = b;
 256     }
 257
 258     // Saving the json Configurations file if exists at server location for action policy.
 259     private void saveActionBody(String policyName, String actionBodyData) {
 260         try {
 261             if(policyName.endsWith(".xml")){
 262                 policyName = policyName.replace(".xml", "");
 263             }
 264             File file = new File(ACTION_HOME+ File.separator + policyName + ".json");
 265             FileWriter fw = new FileWriter(file.getAbsoluteFile());
 266             BufferedWriter bw = new BufferedWriter(fw);
 267             bw.write(actionBodyData);
 268             bw.close();
 269             if (LOGGER.isInfoEnabled()) {
 270                 LOGGER.info("Action Body is succesfully saved at " + file.getAbsolutePath());
 271             }
 272         } catch (IOException e) {
 273             LOGGER.error("Exception Occured"+e);
 274         }
 275     }
 276
 277     // Data required for obligation part is setting here.
 278     private ObligationExpressionsType getObligationExpressions() {
 279         ObligationExpressionsType obligations = new ObligationExpressionsType();
 280
 281         ObligationExpressionType obligation = new ObligationExpressionType();
 282         String comboDictValue = policyAdapter.getActionAttribute();
 283         obligation.setObligationId(comboDictValue);
 284         obligation.setFulfillOn(EffectType.PERMIT);
 285
 286         // Add Action Assignment:
 287         AttributeAssignmentExpressionType assignment1 = new AttributeAssignmentExpressionType();
 288         assignment1.setAttributeId(PERFORMER_ATTRIBUTEID);
 289         assignment1.setCategory(CATEGORY_RECIPIENT_SUBJECT);
 290
 291         AttributeValueType actionNameAttributeValue = new AttributeValueType();
 292         actionNameAttributeValue.setDataType(STRING_DATATYPE);
 293         actionNameAttributeValue.getContent().add(performer.get(policyAdapter.getActionPerformer()));
 294
 295         assignment1.setExpression(new ObjectFactory().createAttributeValue(actionNameAttributeValue));
 296         obligation.getAttributeAssignmentExpression().add(assignment1);
 297
 298         // Add Type Assignment:
 299         AttributeAssignmentExpressionType assignmentType = new AttributeAssignmentExpressionType();
 300         assignmentType.setAttributeId(TYPE_ATTRIBUTEID);
 301         assignmentType.setCategory(CATEGORY_RESOURCE);
 302
 303         AttributeValueType typeAttributeValue = new AttributeValueType();
 304         typeAttributeValue.setDataType(STRING_DATATYPE);
 305         String actionDictType = policyAdapter.getActionDictType();
 306         typeAttributeValue.getContent().add(actionDictType);
 307
 308         assignmentType.setExpression(new ObjectFactory().createAttributeValue(typeAttributeValue));
 309         obligation.getAttributeAssignmentExpression().add(assignmentType);
 310
 311         // Add Rest_URL Assignment:
 312         AttributeAssignmentExpressionType assignmentURL = new AttributeAssignmentExpressionType();
 313         assignmentURL.setAttributeId(URL_ATTRIBUTEID);
 314         assignmentURL.setCategory(CATEGORY_RESOURCE);
 315
 316         AttributeValueType actionURLAttributeValue = new AttributeValueType();
 317         actionURLAttributeValue.setDataType(URI_DATATYPE);
 318         String actionDictUrl = policyAdapter.getActionDictUrl();
 319         actionURLAttributeValue.getContent().add(actionDictUrl);
 320
 321         assignmentURL.setExpression(new ObjectFactory().createAttributeValue(actionURLAttributeValue));
 322         obligation.getAttributeAssignmentExpression().add(assignmentURL);
 323
 324         // Add Method Assignment:
 325         AttributeAssignmentExpressionType assignmentMethod = new AttributeAssignmentExpressionType();
 326         assignmentMethod.setAttributeId(METHOD_ATTRIBUTEID);
 327         assignmentMethod.setCategory(CATEGORY_RESOURCE);
 328
 329         AttributeValueType methodAttributeValue = new AttributeValueType();
 330         methodAttributeValue.setDataType(STRING_DATATYPE);
 331         String actionDictMethod = policyAdapter.getActionDictMethod();
 332         methodAttributeValue.getContent().add(actionDictMethod);
 333
 334         assignmentMethod.setExpression(new ObjectFactory().createAttributeValue(methodAttributeValue));
 335         obligation.getAttributeAssignmentExpression().add(assignmentMethod);
 336
 337         // Add JSON_URL Assignment:
 338         String actionBody = policyAdapter.getActionBody();
 339         if (actionBody != null) {
 340             AttributeAssignmentExpressionType assignmentJsonURL = new AttributeAssignmentExpressionType();
 341             assignmentJsonURL.setAttributeId(BODY_ATTRIBUTEID);
 342             assignmentJsonURL.setCategory(CATEGORY_RESOURCE);
 343
 344             AttributeValueType jsonURLAttributeValue = new AttributeValueType();
 345             jsonURLAttributeValue.setDataType(URI_DATATYPE);
 346             jsonURLAttributeValue.getContent().add(CONFIG_URL + "/Action/"  + policyName + ".json");
 347
 348             assignmentJsonURL.setExpression(new ObjectFactory().createAttributeValue(jsonURLAttributeValue));
 349             obligation.getAttributeAssignmentExpression().add(assignmentJsonURL);
 350         }
 351
 352         String headerVal = policyAdapter.getActionDictHeader();
 353         if(headerVal != null && !headerVal.trim().isEmpty()){
 354             // parse it on : to get number of headers
 355             String[] result = headerVal.split(":");
 356             for (String eachString : result){
 357                 // parse each value on =
 358                 String[] textFieldVals = eachString.split("=");
 359                 obligation.getAttributeAssignmentExpression().add(addDynamicHeaders(textFieldVals[0], textFieldVals[1]));
 360             }
 361         }
 362
 363         obligations.getObligationExpression().add(obligation);
 364         return obligations;
 365     }
 366
 367
 368     // if compound setting the inner apply here
 369     protected ApplyType getInnerActionApply(String value1Label) {
 370         ApplyType actionApply = new ApplyType();
 371         int index = 0;
 372         // check the index for the label.
 373         for (String labelAttr : dynamicLabelRuleAlgorithms) {
 374             if (labelAttr.equals(value1Label)) {
 375                 String value1 = dynamicFieldOneRuleAlgorithms.get(index).toString();
 376                 // check if the row contains label again
 377                 for (String labelValue : dynamicLabelRuleAlgorithms) {
 378                     if (labelValue.equals(value1)) {
 379                         return getCompoundApply(index);
 380                     }
 381                 }
 382
 383                 // Getting the values from the form.
 384                 String functionKey = dynamicFieldFunctionRuleAlgorithms.get(index).toString();
 385                 String value2 = dynamicFieldTwoRuleAlgorithms.get(index).toString();
 386                 actionApply.setFunctionId(dropDownMap.get(functionKey));
 387                 // if two text field are rule attributes.
 388                 if ((value1.contains(RULE_VARIABLE)) && (value2.contains(RULE_VARIABLE))) {
 389                     ApplyType innerActionApply1 = new ApplyType();
 390                     ApplyType innerActionApply2 = new ApplyType();
 391                     AttributeDesignatorType attributeDesignator1 = new AttributeDesignatorType();
 392                     AttributeDesignatorType attributeDesignator2 = new AttributeDesignatorType();
 393                     // If selected function is Integer function set integer functionID
 394                     if (functionKey.toLowerCase().contains("integer")) {
 395                         innerActionApply1.setFunctionId(FUNTION_INTEGER_ONE_AND_ONLY);
 396                         innerActionApply2.setFunctionId(FUNTION_INTEGER_ONE_AND_ONLY);
 397                         attributeDesignator1.setDataType(INTEGER_DATATYPE);
 398                         attributeDesignator2.setDataType(INTEGER_DATATYPE);
 399                     } else {
 400                         // If selected function is not a Integer function
 401                         // set String functionID
 402                         innerActionApply1.setFunctionId(FUNCTION_STRING_ONE_AND_ONLY);
 403                         innerActionApply2.setFunctionId(FUNCTION_STRING_ONE_AND_ONLY);
 404                         attributeDesignator1.setDataType(STRING_DATATYPE);
 405                         attributeDesignator2.setDataType(STRING_DATATYPE);
 406                     }
 407                     attributeDesignator1.setCategory(CATEGORY_RESOURCE);
 408                     attributeDesignator2.setCategory(CATEGORY_RESOURCE);
 409
 410                     // Here set actual field values
 411                     attributeDesignator1.setAttributeId(value1.contains("resource:") ? value1.substring(9): value1.substring(8));
 412                     attributeDesignator2.setAttributeId(value1.contains("resource:") ? value1.substring(9): value1.substring(8));
 413
 414                     innerActionApply1.getExpression().add(new ObjectFactory().createAttributeDesignator(attributeDesignator1));
 415                     innerActionApply2.getExpression().add(new ObjectFactory().createAttributeDesignator(attributeDesignator2));
 416
 417                     actionApply.getExpression().add(new ObjectFactory().createApply(innerActionApply1));
 418                     actionApply.getExpression().add(new ObjectFactory().createApply(innerActionApply2));
 419
 420                 } else {// if either of one text field is rule attribute.
 421                     ApplyType innerActionApply = new ApplyType();
 422                     AttributeDesignatorType attributeDesignator = new AttributeDesignatorType();
 423                     AttributeValueType actionConditionAttributeValue = new AttributeValueType();
 424
 425                     if (functionKey.toLowerCase().contains("integer")) {
 426                         innerActionApply.setFunctionId(FUNTION_INTEGER_ONE_AND_ONLY);
 427                         actionConditionAttributeValue.setDataType(INTEGER_DATATYPE);
 428                         attributeDesignator.setDataType(INTEGER_DATATYPE);
 429                     } else {
 430                         innerActionApply.setFunctionId(FUNCTION_STRING_ONE_AND_ONLY);
 431                         actionConditionAttributeValue.setDataType(STRING_DATATYPE);
 432                         attributeDesignator.setDataType(STRING_DATATYPE);
 433                     }
 434
 435                     String attributeId = null;
 436                     String attributeValue = null;
 437
 438                     // Find which textField has rule attribute and set it as
 439                     attributeId = value1;
 440                     attributeValue = value2;
 441
 442                     if (attributeId != null) {
 443                         attributeDesignator.setCategory(CATEGORY_RESOURCE);
 444                         attributeDesignator.setAttributeId(attributeId);
 445                     }
 446                     actionConditionAttributeValue.getContent().add(attributeValue);
 447                     innerActionApply.getExpression().add(new ObjectFactory().createAttributeDesignator(attributeDesignator));
 448                     // Decide the order of element based the values.
 449                     if (attributeId.equals(value1)) {
 450                         actionApply.getExpression().add(new ObjectFactory().createApply(innerActionApply));
 451                         actionApply.getExpression().add(new ObjectFactory().createAttributeValue(actionConditionAttributeValue));
 452                     } else {
 453                         actionApply.getExpression().add(new ObjectFactory().createAttributeValue(actionConditionAttributeValue));
 454                         actionApply.getExpression().add(new ObjectFactory().createApply(innerActionApply));
 455                     }
 456                 }
 457             }
 458             index++;
 459         }
 460         return actionApply;
 461     }
 462
 463     // if the rule algorithm is multiple compound one setting the apply
 464     protected ApplyType getCompoundApply(int index) {
 465         ApplyType actionApply = new ApplyType();
 466         String selectedFunction = dynamicFieldFunctionRuleAlgorithms.get(index).toString();
 467         String value1 = dynamicFieldOneRuleAlgorithms.get(index).toString();
 468         String value2 = dynamicFieldTwoRuleAlgorithms.get(index).toString();
 469         actionApply.setFunctionId(dropDownMap.get(selectedFunction));
 470         actionApply.getExpression().add(new ObjectFactory().createApply(getInnerActionApply(value1)));
 471         actionApply.getExpression().add(new ObjectFactory().createApply(getInnerActionApply(value2)));
 472         return actionApply;
 473     }
 474
 475     // Adding the dynamic headers if any
 476     private AttributeAssignmentExpressionType addDynamicHeaders(String header, String value) {
 477         AttributeAssignmentExpressionType assignmentHeaders = new AttributeAssignmentExpressionType();
 478         assignmentHeaders.setAttributeId("headers:" + header);
 479         assignmentHeaders.setCategory(CATEGORY_RESOURCE);
 480
 481         AttributeValueType headersAttributeValue = new AttributeValueType();
 482         headersAttributeValue.setDataType(STRING_DATATYPE);
 483         headersAttributeValue.getContent().add(value);
 484
 485         assignmentHeaders.setExpression(new ObjectFactory().createAttributeValue(headersAttributeValue));
 486         return assignmentHeaders;
 487     }
 488
 489     private Map<String,String> createDropDownMap(){
 490         JPAUtils jpaUtils = null;
 491         Map<String, String> dropDownMap = new HashMap<>();
 492         try {
 493             jpaUtils = JPAUtils.getJPAUtilsInstance(XACMLPapServlet.getEmf());
 494         } catch (Exception e) {
 495             LOGGER.error("Exception Occured"+e);
 496         }
 497         if(jpaUtils != null){
 498             Map<Datatype, List<FunctionDefinition>> functionMap = jpaUtils.getFunctionDatatypeMap();
 499
 500             for (Datatype id : functionMap.keySet()) {
 501                 List<FunctionDefinition> functionDefinitions = (List<FunctionDefinition>) functionMap
 502                         .get(id);
 503                 for (FunctionDefinition functionDef : functionDefinitions) {
 504                     dropDownMap.put(functionDef.getShortname(),functionDef.getXacmlid());
 505                 }
 506             }
 507         }
 508         return dropDownMap;
 509     }
 510
 511     @Override
 512     public Object getCorrectPolicyDataObject() {
 513         return policyAdapter.getPolicyData();
 514     }
 515
 516 }