ECOMP-PAP-REST/src/main/java/org/openecomp/policy/pap/xacml/rest/components/SafePolicyBuilder.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ECOMP-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 package org.openecomp.policy.pap.xacml.rest.components;
  21
  22 import java.util.List;
  23 import java.util.Map;
  24 import java.util.regex.Matcher;
  25 import java.util.regex.Pattern;
  26
  27 import org.openecomp.policy.common.logging.eelf.PolicyLogger;
  28 import org.openecomp.policy.controlloop.policy.guard.ControlLoopGuard;
  29 import org.yaml.snakeyaml.Yaml;
  30 import org.yaml.snakeyaml.constructor.Constructor;
  31
  32 public class SafePolicyBuilder {
  33
  34         private SafePolicyBuilder(){
  35                 //Private Constructor.
  36         }
  37
  38         public static ControlLoopGuard loadYamlGuard(String specification) {
  39                 //
  40                 // Read the yaml into our Java Object
  41                 //
  42                 PolicyLogger.info("Requested YAML to convert : " + specification);
  43                 Yaml yaml = new Yaml(new Constructor(ControlLoopGuard.class));
  44                 Object obj = yaml.load(specification);
  45                 return (ControlLoopGuard) obj;
  46         }
  47
  48         public static String generateXacmlGuard(String xacmlFileContent,Map<String, String> generateMap, List<String> blacklist) {
  49                 for(Map.Entry<String,String> map: generateMap.entrySet()){
  50                         Pattern p = Pattern.compile("\\$\\{" +map.getKey() +"\\}");
  51                         Matcher m = p.matcher(xacmlFileContent);
  52                         String finalInput = map.getValue();
  53                         if(finalInput.contains("$")){
  54                                 finalInput = finalInput.replace("$", "\\$");
  55                         }
  56                         xacmlFileContent=m.replaceAll(finalInput);
  57                 }
  58                 if(blacklist!=null && !blacklist.isEmpty()){
  59                         StringBuilder rule = new StringBuilder();
  60                         for(String blackListName : blacklist){
  61                                 if(blackListName.contains("$")){
  62                                         blackListName = blackListName.replace("$", "\\$");
  63                                 }
  64                                 rule.append("<AttributeValue DataType=\"http://www.w3.org/2001/XMLSchema#string\">"+blackListName+"</AttributeValue>");
  65                         }
  66                         Pattern p = Pattern.compile("\\$\\{blackListElement\\}");
  67                         Matcher m = p.matcher(xacmlFileContent);
  68                         xacmlFileContent=m.replaceAll(rule.toString());
  69                 }
  70                 PolicyLogger.info("Generated XACML from the YAML Spec: \n" + xacmlFileContent);
  71                 return xacmlFileContent;
  72         }
  73 }