| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| |
| /* |
| * AT&T - PROPRIETARY |
| * THIS FILE CONTAINS PROPRIETARY INFORMATION OF |
| * AT&T AND IS NOT TO BE DISCLOSED OR USED EXCEPT IN |
| * ACCORDANCE WITH APPLICABLE AGREEMENTS. |
| * |
| * Copyright (c) 2013 AT&T Knowledge Ventures |
| * Unpublished and Not for Publication |
| * All Rights Reserved |
| */ |
| package com.att.research.xacmlatt.pdp.std; |
| |
| import java.lang.reflect.Field; |
| import java.lang.reflect.Modifier; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import com.att.research.xacml.api.Identifier; |
| import com.att.research.xacmlatt.pdp.policy.CombiningAlgorithm; |
| import com.att.research.xacmlatt.pdp.policy.CombiningAlgorithmFactory; |
| import com.att.research.xacmlatt.pdp.policy.PolicySetChild; |
| import com.att.research.xacmlatt.pdp.policy.Rule; |
| |
| /** |
| * StdCombiningAlgorithmFactory extends {@link com.att.research.xacmlatt.pdp.policy.CombiningAlgorithmFactory} to implement |
| * a mapping from {@link com.att.research.xacml.api.Identifier}s to |
| * the standard {@link com.att.research.xacmlatt.pdp.policy.CombiningAlgorithm} implementations. |
| * |
| * @author car |
| * @version $Revision: 1.2 $ |
| */ |
| public class StdCombiningAlgorithmFactory extends CombiningAlgorithmFactory { |
| private static Map<Identifier,CombiningAlgorithm<Rule>> mapRuleCombiningAlgorithms |
| = new HashMap<Identifier,CombiningAlgorithm<Rule>>(); |
| private static Map<Identifier,CombiningAlgorithm<PolicySetChild>> mapPolicyCombiningAlgorithms |
| = new HashMap<Identifier,CombiningAlgorithm<PolicySetChild>>(); |
| private static boolean needInit = true; |
| |
| protected static void registerRuleCombiningAlgorithm(CombiningAlgorithm<Rule> ruleCombiningAlgorithm) { |
| mapRuleCombiningAlgorithms.put(ruleCombiningAlgorithm.getId(), ruleCombiningAlgorithm); |
| } |
| |
| protected static void registerPolicyCombiningAlgorithm(CombiningAlgorithm<PolicySetChild> policyCombiningAlgorithm) { |
| mapPolicyCombiningAlgorithms.put(policyCombiningAlgorithm.getId(), policyCombiningAlgorithm); |
| } |
| |
| @SuppressWarnings("unchecked") |
| private static void initMap() { |
| if (needInit) { |
| synchronized(mapRuleCombiningAlgorithms) { |
| if (needInit) { |
| needInit = false; |
| Field[] declaredFields = StdCombiningAlgorithms.class.getFields(); |
| for (Field field : declaredFields) { |
| if (Modifier.isStatic(field.getModifiers()) && |
| Modifier.isPublic(field.getModifiers()) && |
| field.getName().startsWith(StdCombiningAlgorithms.PREFIX_CA) && |
| CombiningAlgorithm.class.isAssignableFrom(field.getType()) |
| ) { |
| try { |
| if (field.getName().startsWith(StdCombiningAlgorithms.PREFIX_RULE)) { |
| registerRuleCombiningAlgorithm((CombiningAlgorithm<Rule>)field.get(null)); |
| } else if (field.getName().startsWith(StdCombiningAlgorithms.PREFIX_POLICY)) { |
| registerPolicyCombiningAlgorithm((CombiningAlgorithm<PolicySetChild>)field.get(null)); |
| } |
| } catch (IllegalAccessException ex) { |
| |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| public StdCombiningAlgorithmFactory() { |
| initMap(); |
| } |
| |
| @Override |
| public CombiningAlgorithm<Rule> getRuleCombiningAlgorithm(Identifier combiningAlgorithmId) { |
| return mapRuleCombiningAlgorithms.get(combiningAlgorithmId); |
| } |
| |
| @Override |
| public CombiningAlgorithm<PolicySetChild> getPolicyCombiningAlgorithm(Identifier combiningAlgorithmId) { |
| return mapPolicyCombiningAlgorithms.get(combiningAlgorithmId); |
| } |
| } |