ECOMP-PDP/src/main/java/org/openecomp/policy/xacml/custom/EcompFunctionDefinitionFactory.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ECOMP-PDP
   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.xacml.custom;
  21
  22 import java.lang.reflect.Field;
  23 import java.lang.reflect.Modifier;
  24 import java.util.HashMap;
  25 import java.util.Map;
  26
  27 import org.openecomp.policy.xacml.pdp.std.functions.FunctionDefinitionCustomRegexpMatch;
  28
  29 import com.att.research.xacml.api.Identifier;
  30 import com.att.research.xacml.std.IdentifierImpl;
  31 import com.att.research.xacml.std.datatypes.DataTypes;
  32 import com.att.research.xacmlatt.pdp.policy.FunctionDefinition;
  33 import com.att.research.xacmlatt.pdp.policy.FunctionDefinitionFactory;
  34 import com.att.research.xacmlatt.pdp.std.StdFunctions;
  35
  36 public class EcompFunctionDefinitionFactory extends FunctionDefinitionFactory {
  37         private static Map<Identifier,FunctionDefinition>       mapFunctionDefinitions  = new HashMap<>();
  38         private static boolean                                                          needMapInit                             = true;
  39
  40         public static final Identifier ID_FUNCTION_CUSTOM_REGEXP_MATCH                                          = new IdentifierImpl("org.openecomp.function.regex-match");
  41
  42         private static final FunctionDefinition FD_CUSTOM_REGEXP_MATCH = new FunctionDefinitionCustomRegexpMatch<>(ID_FUNCTION_CUSTOM_REGEXP_MATCH, DataTypes.DT_STRING);
  43
  44         private static void register(FunctionDefinition functionDefinition) {
  45                 mapFunctionDefinitions.put(functionDefinition.getId(), functionDefinition);
  46         }
  47
  48         private static void initMap() {
  49                 if (needMapInit) {
  50                         synchronized(mapFunctionDefinitions) {
  51                                 if (needMapInit) {
  52                                         needMapInit     = false;
  53                                         Field[] declaredFields  = StdFunctions.class.getDeclaredFields();
  54                                         for (Field field : declaredFields) {
  55                                                 if (Modifier.isStatic(field.getModifiers()) &&
  56                                                         field.getName().startsWith(StdFunctions.FD_PREFIX) &&
  57                                                         FunctionDefinition.class.isAssignableFrom(field.getType()) &&
  58                                                         Modifier.isPublic(field.getModifiers())
  59                                                 ) {
  60                                                         try {
  61                                                                 register((FunctionDefinition)(field.get(null)));
  62                                                         } catch (IllegalAccessException ex) {
  63
  64                                                         }
  65                                                 }
  66                                         }
  67                                         //
  68                                         // Our custom function
  69                                         //
  70                                         //register(FunctionDefinitionCustomRegexpMatch);
  71                                         register(FD_CUSTOM_REGEXP_MATCH);
  72                                 }
  73                         }
  74                 }
  75         }
  76
  77         public EcompFunctionDefinitionFactory() {
  78                 initMap();
  79         }
  80
  81         @Override
  82         public FunctionDefinition getFunctionDefinition(Identifier functionId) {
  83                 return mapFunctionDefinitions.get(functionId);
  84         }
  85 }