| /* |
| * 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| * Unpublished and Not for Publication |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 org.apache.openaz.xacml.pdp.policy; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * TargetedCombinerParameterMap is a utility for maintaining a collection of |
| * {@link org.apache.openaz.xacml.policy.TargetedCombinerParameter} objects with the mappings to their |
| * targets. |
| * |
| * @param <T> the type of the identifier for the <code>TargetedCombinerParameter</code>s in the map |
| * @param <U> the type of the object referenced by the identifier |
| */ |
| public class TargetedCombinerParameterMap<T, U> { |
| List<TargetedCombinerParameter<T, U>> targetedCombinerParameters = null; |
| Map<T, U> mapTargetIdToTarget = new HashMap<T, U>(); |
| Map<U, List<CombinerParameter>> mapTargetToCombinerParameters = null; |
| |
| private void ensureTargetedCombinerParameters() { |
| if (this.targetedCombinerParameters == null) { |
| this.targetedCombinerParameters = new ArrayList<TargetedCombinerParameter<T, U>>(); |
| } |
| } |
| |
| /** |
| * Gets the target from the given <code>TargetedCombinerParameter</code> if present. If not, find the |
| * target in the target id to target mapping, update the <code>TargetedCombinerParameter</code> and then |
| * return the target. |
| * |
| * @param targetedCombinerParameter the <code>TargetedCombinerParameter</code> to resolve |
| * @return the target for the given <code>TargetedCombinerParameter</code> |
| */ |
| protected U resolve(TargetedCombinerParameter<T, U> targetedCombinerParameter) { |
| U result; |
| if ((result = targetedCombinerParameter.getTarget()) != null) { |
| return result; |
| } else if ((result = this.mapTargetIdToTarget.get(targetedCombinerParameter.getTargetId())) != null) { |
| targetedCombinerParameter.setTarget(result); |
| return result; |
| } else { |
| return null; |
| } |
| } |
| |
| /** |
| * Ensures the <code>Map</code> from targets to <code>List</code> of <code>CombinerParameter</code>s has |
| * been created if needed. |
| * |
| * @throws IllegalStateException if there are <code>TargetedCombinerParameter</code>s that cannot be |
| * resolved |
| */ |
| protected void ensureMap() throws IllegalStateException { |
| if (this.mapTargetToCombinerParameters == null |
| && this.targetedCombinerParameters != null && this.targetedCombinerParameters.size() > 0) { |
| this.mapTargetToCombinerParameters = new HashMap<U, List<CombinerParameter>>(); |
| for (TargetedCombinerParameter<T, U> targetedCombinerParameter : this.targetedCombinerParameters) { |
| U target = this.resolve(targetedCombinerParameter); |
| if (target == null) { |
| throw new IllegalStateException("Unresolved TargetCombinerParameter \"" |
| + targetedCombinerParameter.toString() + "\""); |
| } |
| List<CombinerParameter> listCombinerParameters = this.mapTargetToCombinerParameters |
| .get(target); |
| if (listCombinerParameters == null) { |
| listCombinerParameters = new ArrayList<CombinerParameter>(); |
| this.mapTargetToCombinerParameters.put(target, listCombinerParameters); |
| } |
| listCombinerParameters.add(targetedCombinerParameter); |
| } |
| } |
| } |
| |
| /** |
| * Creates a new <code>TargetedCombinerParameterMap</code>. |
| */ |
| public TargetedCombinerParameterMap() { |
| } |
| |
| /** |
| * Adds a new target object to the identifier map. |
| * |
| * @param targetId the id for the target |
| * @param target the target |
| */ |
| public void addTarget(T targetId, U target) { |
| this.mapTargetIdToTarget.put(targetId, target); |
| } |
| |
| /** |
| * Adds a new <code>TargetedCombinerParameter</code> to this <code>TargetedCombinerParameterMap</code>. |
| * |
| * @param targetdCombinerParameter the <code>TargetedCombinerParameter</code> to add |
| */ |
| public void addCombinerParameter(TargetedCombinerParameter<T, U> targetdCombinerParameter) { |
| this.ensureTargetedCombinerParameters(); |
| this.targetedCombinerParameters.add(targetdCombinerParameter); |
| this.mapTargetToCombinerParameters = null; |
| } |
| |
| /** |
| * Adds the contents of the given <code>Collection</code> of <code>TargetedCombinerParameter</code>s to |
| * this <code>TargetedCombinerParameterMap</code>. |
| * |
| * @param listTargetedCombinerParameters the <code>Collection</code> of |
| * <code>TargetedCombinerParameter</code>s to add |
| */ |
| public void addCombinerParameters(Collection<TargetedCombinerParameter<T, U>> listTargetedCombinerParameters) { |
| this.ensureTargetedCombinerParameters(); |
| this.targetedCombinerParameters.addAll(listTargetedCombinerParameters); |
| this.mapTargetToCombinerParameters = null; |
| } |
| |
| /** |
| * Sets the set of <code>TargetedCombinerParameter</code>s for this |
| * <code>TargetedCombinerParameterMap</code> to the contents of the given <code>Collection</code>> |
| * |
| * @param listTargetedCombinerParameters the <code>Collection</code> of |
| * <code>TargetedCombinerParameter</code>s to set |
| */ |
| public void setCombinerParameters(Collection<TargetedCombinerParameter<T, U>> listTargetedCombinerParameters) { |
| this.targetedCombinerParameters = null; |
| if (listTargetedCombinerParameters != null) { |
| this.addCombinerParameters(targetedCombinerParameters); |
| } |
| } |
| |
| /** |
| * Looks up the given target in the map for any {@link CombinerParameter}s for the given target. |
| * |
| * @param target the target |
| * @return a <code>List</code> of <code>CombinerParameter</code>s for the target or null if none |
| * @throws IllegalStateException if there are <code>TargetedCombinerParameter</code>s that cannot be |
| * resolved |
| */ |
| public List<CombinerParameter> getCombinerParameters(U target) throws IllegalStateException { |
| this.ensureMap(); |
| return (this.mapTargetToCombinerParameters == null ? null : this.mapTargetToCombinerParameters |
| .get(target)); |
| } |
| |
| public Iterator<TargetedCombinerParameter<T, U>> getTargetedCombinerParameters() { |
| return (this.targetedCombinerParameters == null ? null : this.targetedCombinerParameters.iterator()); |
| } |
| |
| } |